If you understand what an IRS Revenue Agent does on paper, you understand half of an examination. The other half — the half that determines outcomes — is how they think. The mental model an agent brings to a case shapes which issues get developed, which positions get pushed, which compromises get accepted, and ultimately whether your audit closes for $0, for the full proposed adjustment, or somewhere in between.

This is the IRS audit playbook from inside. Not the procedural manual published in the Internal Revenue Manual — that document is publicly available — but the working mental framework that experienced Revenue Agents actually use as they prioritize cases, identify issues, and make the dozens of small decisions that aggregate into an examination’s outcome.

This article is informed by Kugelman Law attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm in February 2026. For an introduction to what Revenue Agents formally do and how examinations are structured, see our companion piece on what an IRS Revenue Agent does. The article below picks up where that one leaves off — focused not on the structure of an audit but on the thinking behind it.

How Returns Get on the Radar in the First Place

Most taxpayers imagine return selection as a uniform process. In practice, it is a triage. The IRS receives more than 150 million individual returns each year, and the examination function can pursue only a small fraction of them. Every return that reaches a Revenue Agent’s desk has survived multiple rounds of selection — which means by the time the examination opens, someone in the IRS has already decided this return is worth investing real resources in.

That triage happens through several mechanisms — DIF scoring, related-return pickups, information matching, project initiatives, and others — which we covered in detail in our prior article. What matters for understanding the playbook is the agent’s mindset when a case is assigned: the agent assumes there is something to find. The selection process is statistical, not certain — but it is good enough that experienced agents do not approach examinations as fishing expeditions. They approach them as recovery operations: the system has flagged something, and the agent’s job is to figure out what.

This default assumption matters defensively. Many taxpayer responses during an audit are calibrated to “look cooperative” or “explain things,” on the assumption that the agent is starting from neutral. The agent is not starting from neutral. The agent is starting from “the system thinks something is here.” Responses calibrated to that posture are different from responses calibrated to a neutral counterparty.

How a Revenue Agent Builds a Case from Suspicion to Adjustment

An audit, viewed from the agent’s seat, is not a single inquiry. It is a layered case-building exercise. Each layer corresponds to a different mental task.

Stage 1: Pre-Contact Intuition

Before the agent ever issues a notice, they have read the return, the notes from selection, prior-year filings, and any third-party data already in IRS systems. They have formed a working hypothesis about what the case is — and a working list of issues they expect to develop. Experienced agents are usually right about the rough shape of the case before the first IDR ever leaves their desk.

What the taxpayer sees as the “first contact” is, from the agent’s perspective, the third or fourth phase of the case. Defense strategies that treat the opening conference as the start of the audit are already a step behind.

Stage 2: Issue Identification Through Documents

The first Information Document Request (IDR) is the agent’s tool for confirming or refuting the pre-contact hypothesis. They are not asking for documents because they want to read receipts. They are asking because they want to see whether reality matches their hypothesis — and where reality does not match, they want to see where the gaps are.

Experienced agents read taxpayer responses for three signals: what was produced, what was conspicuously absent, and what the production reveals about how the taxpayer keeps records. A neat, well-organized response signals a sophisticated taxpayer (and probably a careful preparer). A messy, partial, or contradictory response signals issues that are likely to multiply as the audit goes deeper. Both responses tell the agent how aggressively to invest in the case.

Stage 3: Position Development

Once issues are identified, the agent shifts from finding things to building something. A “position” is the IRS’s articulated theory for why a particular adjustment should be made — and the case file the agent builds to support that position is what survives into Appeals, into Tax Court, and into any settlement discussion.

This is where mental discipline starts to differentiate experienced agents from inexperienced ones. Strong positions are built on documents, third-party records, and clean factual narratives. Weak positions rely on inference, taxpayer statements, or agent-developed math that the taxpayer can re-do. A good defense team can usually tell within the first few exchanges which kind of position the agent is building.

Stage 4: Workpaper Construction and Supervisory Sign-Off

Workpapers are not the agent’s notes. They are the IRS’s case file — the formal record that managers, IRS Counsel, Appeals officers, and (if it gets that far) the Tax Court will rely on. Every position the agent develops must eventually be expressed in workpapers that withstand internal review.

This creates a meaningful internal filter. Positions an agent personally believes in but cannot reduce to a clean workpaper get dropped. Positions a manager pushes back on get refined or abandoned. Positions IRS Counsel will not support get withdrawn. The defense team that understands this filter — that knows which positions are likely to survive review and which are not — can apply pressure exactly where it is most likely to produce results.

The Internal Pressures That Shape Every Audit Decision

A Revenue Agent does not have unlimited time, and the IRS does not have unlimited capacity. Every audit operates under three quiet but constant pressures that shape decisions taxpayers rarely see.

Cycle time. Agents have caseload expectations. An audit that drags is an audit that pulls the agent away from their other cases — and from their performance metrics. This is one of the reasons that responsive, well-organized taxpayer cooperation often produces better outcomes than passive resistance: the agent’s incentive is to close the case efficiently, and giving them a clean path to closure is sometimes worth more than fighting every issue.

Review risk. Every aggressive position the agent advances will be reviewed — by the manager, by IRS Counsel, sometimes by Appeals. An agent who advances positions that get overturned at review damages their internal credibility. This is why agents are often reluctant to push aggressive penalty positions, civil fraud allegations, or controversial legal theories unless the workpapers genuinely support them. Recognizing the threshold at which an agent will or will not commit to a position is one of the highest-leverage insights a defense team can have.

Specialty referrals. Complex examinations frequently involve specialists — international examiners, computer audit specialists, financial product specialists, valuation engineers. Bringing in a specialist takes time and case management. Agents weigh the value of escalation against its cost. A defense that signals a serious specialist would face credible counter-arguments may shift the case toward narrower issues that the agent can resolve without bringing in additional resources.

What Agents Look For That Taxpayers Don’t Recognize

Some of the most valuable inside-the-IRS knowledge is also the most counterintuitive. The signals below are things Revenue Agents are trained to read but that taxpayers and unprepared representatives often miss entirely.

• Lifestyle versus reported income. Significant gaps between what the return shows and what the taxpayer’s life suggests — homes, cars, travel, business interests visible on social media — are flags agents notice early. The IRS has access to public records and increasingly to other data streams that make these comparisons routine.
• Round numbers. Returns full of round numbers (exactly $5,000 in expenses, exactly $10,000 in donations) signal estimation rather than documentation. Agents notice this and adjust the audit accordingly.
• Inconsistencies across years. A line item that appeared in 2022 but vanished in 2023 — or a deduction that scaled non-linearly with income — invites questions. Agents do not always pursue these, but they note them, and they shape the case file.
• Related-party transactions without arms-length characteristics. Loans between entities with no documented terms, payments to family members for unspecified services, or rent to controlled entities at non-market rates draw immediate attention.
• Cash-intensive businesses with thin paper trails. Restaurants, salons, contractor businesses, and other cash-heavy operations get scrutinized differently. Agents are trained to test reported gross receipts against industry norms and against bank deposits.
• Crypto and digital asset patterns. Returns showing digital asset activity without corresponding income items, or returns answering “no” to the digital asset question while exchange data shows otherwise, are flagged. Our article on IRS cryptocurrency audits explores this pattern in detail.
• Suspiciously timed amendments and late filings. Returns amended after the IRS opened an audit, or returns filed unusually late after notices, draw heightened attention. Agents note timing.

The pattern in all of these: agents are reading the return for signals about the taxpayer, not just about the numbers. Defense strategies that focus only on document production miss this dimension entirely.

How Agents Decide Whether to Push or Fold on an Issue

One of the most useful insights from inside the IRS is the recognition that agents do not push every issue to its limit. Many issues are noticed, considered, and quietly dropped — because the cost-benefit math does not work for the IRS.

The internal calculus on a given issue weighs:

• The dollar amount at stake
• The strength of the documentary support
• The likelihood the position survives Appeals or Tax Court
• The agent’s confidence in the legal theory
• The amount of additional development needed
• Whether the issue connects to other issues already being developed

Issues with strong documentary support, clear law, and meaningful dollars tend to be pushed. Issues with weak documentary support, ambiguous law, or trivial dollars tend to be dropped — even if the agent personally suspects the taxpayer’s position is wrong. The IRS does not pursue every theoretical adjustment. It pursues the ones that pencil out.

A sophisticated defense uses this. By making strong positions stronger and exposing weak positions early, the defense can shift the agent’s calculus on a case. Issues that were borderline tend to fall toward dropping. Issues that were marginal tend to settle on terms favorable to the taxpayer.

When the Audit Plays By Different Rules

Most of the playbook described above applies to standard examinations. There are categories of audits where the rules shift, and recognizing the shift is critical.

Eggshell audits — civil examinations with potential criminal implications — operate under an entirely different set of rules. The agent’s job is no longer to develop adjustments efficiently but to develop the record carefully, with an eye toward potential referral to IRS Criminal Investigation. Cooperation strategies that make sense in a routine audit can be catastrophic in an eggshell audit.

Global High Wealth and LB&I enterprise audits are also their own world. Cycle-time pressures are different, specialist resources are abundant, and the audit considers the entire web of related entities and transactions rather than the individual return. The mental model a Global High Wealth team brings to a case is integrated and patient in ways most taxpayers do not expect.

Project-driven examinations — audits opened as part of a focused enforcement initiative — also play differently. The agent has trained on the project’s target issue, has examined other taxpayers in the same project, and has internal guidance on what positions to develop. A defense that does not recognize the project’s contours will misread the agent’s posture entirely.

In each of these scenarios, defending without inside-the-IRS perspective is defending blind.

What This Means for Defense Strategy

The aggregate of everything above has a single practical implication for taxpayers under audit: the most consequential decisions in your audit are not the visible ones. They are the unseen ones — the agent’s pre-contact hypothesis, the position-building decisions in the workpaper file, the internal review pressures, the issue-by-issue cost-benefit calculations, and the specific signals the agent is reading from your responses that you do not realize you are sending.

This is what an IRS-insider perspective on the defense team actually changes. With Otto Bosch’s experience inside the IRS Global High Wealth Group and Alex Kugelman‘s nearly two decades of federal tax controversy litigation, Kugelman Law approaches every audit defense matter with a working understanding of the playbook on the other side of the table — and a credible litigation backstop if the case cannot be resolved administratively. We covered the full team capability in our article on why a former IRS revenue agent attorney changes audit defense.

Representative outcomes from the firm’s audit defense practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

If you would like to discuss your IRS or FTB matter and how the firm’s combination of inside-the-IRS perspective and federal tax litigation experience can shape your defense, see our tax help resources or contact the firm directly.

Frequently Asked Questions

How do IRS auditors decide which issues to focus on?

Revenue Agents prioritize issues based on a combination of dollar magnitude, strength of documentary support, clarity of the legal theory, and the cost in agent time required to develop the position. Issues that are well-supported, technically clean, and material to the case tend to be pushed. Issues that are weak, ambiguous, or trivial tend to be quietly dropped — even when the agent personally suspects the taxpayer’s position is incorrect.

What red flags do IRS auditors look for?

Common signals include lifestyle inconsistent with reported income, returns full of round numbers, year-over-year inconsistencies in reported items, related-party transactions without arms-length characteristics, cash-intensive businesses with thin documentation, digital asset activity that does not align with reported income, and suspiciously timed amended or late-filed returns.

Can an IRS auditor decide to drop an issue mid-audit?

Yes. Issues that look promising in pre-contact analysis frequently get dropped during fieldwork as documents and explanations come in. Conversely, issues that were not initially identified can emerge from the development process. Audit scope is not fixed at the opening conference — it evolves as the case develops.

What does it mean when an IRS audit closes “no change”?

A no-change closing means the agent did not develop adjustments and the return is accepted as filed. This outcome is more common than many taxpayers assume. It occurs when the issues identified at selection do not survive document review, when the taxpayer’s documentation is strong, or when the cost-benefit math on the available positions does not justify pursuing them.

How do I know if my IRS audit is becoming an eggshell audit?

There are signals — agent questions that focus on knowledge, intent, and willfulness rather than documentation; involvement of specialized fraud or referral-related personnel; specific timing patterns in document requests; and sudden agent reluctance to discuss the case. Recognizing these signals reliably requires controversy experience. If you have any reason to suspect criminal exposure, attorney representation is essential and should be retained before any further communication with the IRS.

Speak With Kugelman Law

If you are facing an IRS audit, controversy, or complex federal tax matter — or if you suspect the IRS is preparing to open one — schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

If you have received an IRS audit notice — or you are worried one might be coming — one of the first questions worth answering is who, exactly, will be examining your return. The answer matters more than most taxpayers realize. The IRS is not a single, undifferentiated organization. Examinations are conducted by specific employees with specific titles, training, and authority — and the most consequential examinations are handled by a particular kind of IRS employee called a Revenue Agent.

So what does an IRS revenue agent do? In short: a Revenue Agent is the IRS employee assigned to conduct in-depth examinations of complex tax returns, develop adjustments, and build the case file the agency relies on at every stage of dispute resolution. A Revenue Agent’s findings become the basis for proposed assessments, penalties, and — if the case escalates — the record that follows the matter into Appeals or U.S. Tax Court.

This article walks through the role of an IRS Revenue Agent from the inside: how cases are selected, what an examination actually looks like step by step, how internal IRS review works, and what taxpayers should understand before responding to the first contact letter. The perspective is informed by Kugelman Law attorney Otto Bosch, who served as a Revenue Agent in the IRS Global High Wealth Group within the Large Business and International (LB&I) Division before joining the firm in February 2026.

What Is an IRS Revenue Agent?

A Revenue Agent is a credentialed IRS employee whose job is to conduct examinations of tax returns. Most Revenue Agents have backgrounds in accounting and have completed extensive in-house IRS training in tax law, examination procedure, and case development. They are professionals, not paper-pushers, and the cases they handle are generally the cases the IRS has decided are worth investing real examination resources in.

Revenue Agents work civilly. That is, they are not criminal investigators (those are Special Agents within IRS Criminal Investigation, or IRS-CI). But Revenue Agents do conduct what the IRS calls eggshell and reverse-eggshell audits — civil examinations that may have parallel or downstream criminal implications — and they are trained to recognize the badges of fraud and to coordinate with IRS-CI when appropriate.

The Revenue Agent’s authority during an examination is significant. They can issue Information Document Requests (IDRs), conduct interviews, summon third-party records under appropriate procedures, propose adjustments, and recommend penalties. What they cannot do alone is impose a final tax liability — that comes through the formal notice procedures and, if contested, through Appeals or the courts.

How IRS Revenue Agents Are Different from Other IRS Personnel

One of the most common sources of confusion for taxpayers is conflating different IRS roles. Three roles in particular are routinely mistaken for one another:

• Revenue Agents conduct civil audits of tax returns. They are accountants who develop adjustments to taxes owed.
• Revenue Officers collect taxes that have already been assessed. They handle levies, liens, wage garnishments, and the negotiation of installment agreements and offers in compromise.
• Special Agents are criminal investigators within IRS-CI. They build criminal tax fraud, money laundering, and related cases for prosecution.

Each role uses different procedures, requires different defensive strategies, and presents different risks. Knowing which IRS employee you are dealing with is the first step in any tax controversy. If a Revenue Officer is on your matter, the assessment phase is over and the focus has shifted to collections defense. If a Special Agent shows up, civil strategy is no longer the right framework. If a Revenue Agent is conducting your audit, the case is in the development phase — and how that development is managed will define the outcome.

How a Return Lands on a Revenue Agent’s Desk

Returns reach Revenue Agents through several distinct paths, and the path matters because it tells the agent — and an experienced defense team — something about the IRS’s interest in the case.

DIF scoring. The Discriminant Function (DIF) system is a statistical model the IRS uses to score returns for audit potential. High-DIF returns are flagged for review and routed for selection. Most ordinary audits begin this way.

Related-return pickups. When a Revenue Agent is examining one return and finds issues that connect to another taxpayer’s return — a partnership and a partner, a corporation and a shareholder, related entities under common ownership — the related return can be opened for examination as well. This is one reason a single audit can quickly grow into multiple coordinated examinations.

Information matching. The IRS receives extensive third-party information — W-2s, 1099s, K-1s, foreign account reports, broker reports, cryptocurrency exchange disclosures — and matches that data against filed returns. Material mismatches generate notices, and significant mismatches can escalate into a full examination.

Compliance projects and initiatives. The IRS regularly runs enforcement initiatives focused on specific issues — syndicated conservation easements, microcaptive insurance arrangements, cryptocurrency reporting, foreign account compliance, and employee retention credit claims, among others. Returns within the scope of an active initiative are far more likely to be selected.

Whistleblower and informant referrals. The IRS Whistleblower Program pays awards for actionable information about tax noncompliance, and substantiated referrals can result in examination.

Global High Wealth and LB&I selection. For the most complex high-net-worth and corporate examinations, returns are selected through specialized risk-based processes within LB&I, including the enterprise-level approach used by the Global High Wealth Group.

The path of selection often shapes the contour of the examination. A DIF-selected return is usually examined for the issues that drove the score. A related-return pickup tends to focus on the connecting transactions. A project-driven examination is concentrated on the specific issue the project is targeting. Recognizing which is which is one of the things a former IRS revenue agent attorney brings to a defense team from day one.

The Anatomy of an IRS Audit from a Revenue Agent’s Perspective

When a Revenue Agent is assigned a case, the examination unfolds along a fairly predictable arc. Understanding that arc — and the agent’s internal incentives at each stage — is essential to responding effectively.

Pre-Contact and Initial Review

Before the agent ever contacts the taxpayer, the case goes through pre-contact analysis. The agent reviews the return, analyst notes, prior-year returns, and any third-party data already on file. They develop a preliminary issue list — the things they expect to examine — and identify the documents they will need. By the time the audit notice arrives in the mail, the agent has already formed initial views about the case. Sophisticated taxpayers (and sophisticated defense counsel) plan around that reality.

The Opening Conference and First Information Document Request

The first formal contact is generally a notice of examination followed by an opening conference (in person, by telephone, or virtually). At or shortly after the opening conference, the agent issues an initial Information Document Request — the IDR — listing documents and information needed to proceed.

The first IDR is one of the most important documents in the entire examination. It defines the initial scope, signals what the agent considers most important, and frames every subsequent issue. Responses to the first IDR generate the second IDR, which is often where the audit’s actual depth becomes visible. Taxpayers who treat the first IDR as routine paperwork frequently regret it.

Issue Development and Fieldwork

This is the heart of the examination. The agent reviews documents, conducts interviews, examines books and records, and develops each issue toward a recommended adjustment. Within LB&I, this stage often involves multiple specialists — international examiners, computer audit specialists, engineers, financial product experts — coordinating on technical questions. Within the Global High Wealth Group, the entire enterprise of related entities and transactions is considered together rather than examined return by return.

During fieldwork, the agent is not only developing issues but also building the workpapers — the internal documentation that will support each adjustment through supervisor review, Appeals, and any subsequent litigation. That workpaper file is the case. Whatever is in it is what the IRS will rely on later. Whatever is not in it is what the taxpayer can challenge.

Internal Review, Supervisor Sign-Off, and Counsel Coordination

Revenue Agents do not act alone. Throughout an examination, supervisors review the agent’s work, push back on weak positions, and approve significant decisions. For complex issues, IRS Counsel may be involved to provide legal advice on questions the examination cannot resolve internally. Aggressive penalties, fraud referrals, summons enforcement, and other escalations all run through layered approval processes.

This internal architecture creates leverage points for the defense. A position the agent personally favors but the manager is reluctant to defend is a different position than one with full institutional backing. Recognizing the difference — and knowing where to apply pressure — is the kind of insight that comes from having been on the inside.

Closing the Case

Examinations close in one of three general ways. A “no-change” closing means the agent did not find adjustments and the return is accepted as filed. An “agreed” closing means the taxpayer accepts the proposed adjustments (typically by signing Form 870 or similar), the deficiency is assessed, and collections begin if amounts are owed. An “unagreed” closing means the taxpayer contests the proposed adjustments, the agent issues a Revenue Agent’s Report and a 30-day letter, and the case proceeds to Appeals — and ultimately, if necessary, to U.S. Tax Court following a statutory notice of deficiency.

How a case closes is heavily influenced by how it was developed during fieldwork. Cases that are positioned correctly during the examination tend to close cleanly. Cases that are mishandled tend to close badly — with assessments larger than they needed to be, penalties that should not have applied, or records that handicap any subsequent appeal.

Where IRS Revenue Agents Work: SB/SE, LB&I, and Global High Wealth

Not all Revenue Agents are equivalent. The IRS organizes its examination function into divisions, and the division handling a particular case tells you a great deal about the agency’s interest and approach.

Small Business / Self-Employed (SB/SE). This is the largest examination division by case volume. SB/SE Revenue Agents handle most individual and small-business audits — Schedule C examinations, smaller partnership audits, closely held business reviews, and a wide range of personal income tax matters.

Large Business and International (LB&I). LB&I handles the more complex side of corporate, partnership, and high-net-worth examinations. LB&I cases tend to involve higher stakes, more specialists, longer timelines, and significantly more sophistication in issue development.

Global High Wealth Group. Within LB&I, the Global High Wealth Group is the most specialized of all — the team that examines the most complex returns of the wealthiest U.S. taxpayers. Global High Wealth uses an enterprise audit approach, looking at the full web of related entities, trusts, partnerships, and personal returns as an integrated whole. Adjustments developed under that approach can surface issues that would be invisible in a return-by-return examination.

For taxpayers facing a Global High Wealth or LB&I examination, the importance of insider perspective is at its highest. The procedures, specialists, internal review processes, and risk calculus inside that group are not visible from the outside. This is precisely the perspective Otto Bosch brings to every Kugelman Law audit defense matter.

What This Means for You as a Taxpayer Under Audit

Two practical implications follow from understanding how Revenue Agents actually work.

First, the early stages of an examination are the most consequential. By the time the case reaches Appeals or court, much of the record is already fixed. Decisions made in responding to the first IDR, in handling the opening conference, in giving (or not giving) interviews, and in producing (or not producing) documents shape the case in ways that cannot be undone later. Audit defense begins with the first contact letter, not with the 30-day letter.

Second, who is on the other side of the table matters. A Revenue Agent in SB/SE conducting a routine Schedule C audit operates very differently than a Global High Wealth team conducting a coordinated enterprise examination. Defense strategy should match the examination — and that match starts with correctly identifying who is examining you and why.

These are the considerations that drive how Kugelman Law approaches every audit defense matter. With founder Alex Kugelman‘s nearly two decades of federal tax controversy and U.S. Tax Court litigation experience and Otto Bosch‘s direct background as a former Revenue Agent in the IRS Global High Wealth Group, the firm pairs federal litigation capability with inside-the-IRS examination experience — a combination most controversy practices simply cannot offer.

Representative outcomes from the firm’s controversy practice include a $365,000 tax debt reduced to a zero-dollar liability, a multi-year audit and non-filing matter resolved with minimal payment, and ten years of unfiled returns brought into compliance with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Frequently Asked Questions

What is the difference between an IRS Revenue Agent and an IRS auditor?

“IRS auditor” is a colloquial term that taxpayers use to describe anyone at the IRS conducting an examination. Inside the agency, the more precise terms are Tax Compliance Officer (TCO) — who handles less complex office and correspondence audits — and Revenue Agent, who handles more complex field examinations. Revenue Agents are the personnel who handle the substantive cases.

How long does an IRS Revenue Agent audit take?

Audit length varies dramatically depending on complexity. A focused single-issue examination may close in a few months. A complex partnership or high-net-worth examination, particularly one conducted through the Global High Wealth Group, can take a year or more. Length is also affected by responsiveness, the number of specialists involved, and whether the case is escalated to Appeals.

Do IRS Revenue Agents have authority to assess penalties?

Yes. Revenue Agents can propose accuracy-related penalties, late-filing and late-payment penalties, and in appropriate cases, civil fraud penalties. Penalty assessments generally require supervisory approval and are subject to challenge through Appeals and the courts. Penalty defense is a meaningful component of any sophisticated audit defense.

Can I refuse to meet with an IRS Revenue Agent?

You can decline to be personally interviewed and have your representative communicate with the agent on your behalf in most circumstances. There is rarely a strategic reason for an unrepresented taxpayer to sit for an unprepared interview with a Revenue Agent. The right approach is to retain a tax controversy attorney before any interview takes place.

What happens if I disagree with the Revenue Agent’s findings?

If the examination ends in proposed adjustments you disagree with, you can request a conference with the agent’s manager, file a formal protest with the IRS Independent Office of Appeals, and ultimately litigate the deficiency in U.S. Tax Court (after a statutory notice of deficiency) or in U.S. District Court or the Court of Federal Claims (after paying the deficiency and filing a refund claim). The path that fits your situation depends on the specific facts.

Speak With Kugelman Law

If a Revenue Agent has opened an examination of your return — or you have reason to believe one is coming — schedule a paid privileged consultation with Kugelman Law. Call (415) 968-1780 or visit our contact page. All consultations are fully protected by attorney-client privilege.

Understanding the stages of an IRS crypto audit is the single most useful thing a taxpayer under examination can do. Each stage has its own rules, its own deadlines, and its own strategic opportunities.

Missing a deadline or misjudging a stage can cost you settlement leverage, appeal rights, or in the worst cases, the ability to challenge the IRS’s position in court at all.

Kugelman Law represents cryptocurrency investors, traders, and businesses in IRS examinations nationwide. This guide walks through the full procedural arc of a federal cryptocurrency audit — from the opening notice through potential U.S. Tax Court litigation — and identifies the decision points where experienced representation changes the outcome.

Why Crypto Audits Follow a Predictable Procedural Path

Federal tax audits, including cryptocurrency audits, are governed by the Internal Revenue Manual, the Internal Revenue Code, and decades of IRS procedural practice. The IRS does not improvise the structure of an audit. It follows a defined sequence of steps, and understanding that sequence gives a prepared taxpayer meaningful strategic advantages. The crypto-specific wrinkles — blockchain forensics, cost basis reconstruction, DeFi and NFT treatment, foreign exchange issues — layer on top of this standard procedural framework.

What follows is the typical sequence for a civil cryptocurrency audit. Criminal investigations follow a different (and far more serious) path and are outside the scope of this article.

Stage 1: The Opening Notice

The audit begins with a letter. For individual cryptocurrency taxpayers, this is typically either a CP2000 notice (for mismatch-driven correspondence audits), Letter 2205 (for office or field audits), or Letter 6173 / 6174 / 6174-A (the crypto-specific “soft letters” the IRS has used to prompt voluntary compliance). Business entities may receive Letter 2205-B.

The opening notice identifies the tax years under examination, the issues to be examined, the examiner assigned, and whether the audit is a correspondence audit (handled by mail), an office audit (conducted at an IRS office), or a field audit (conducted at the taxpayer’s business or representative’s office).

Strategic opportunity at this stage: The opening notice is the best time to engage tax counsel. A Form 2848 Power of Attorney filed promptly routes all communications through your attorney, establishes attorney-client privilege over your audit strategy, and signals to the examiner that the file will be handled professionally. Taxpayers who wait until the audit is already in motion give up meaningful leverage.

For a deeper look at how each type of audit differs, see our guide to types of cryptocurrency tax audits.

Stage 2: The Initial Interview and Scope Setting

In office and field audits, the examiner will typically request an initial interview, either in person or by telephone. For cryptocurrency cases, the examiner uses this interview to understand the taxpayer’s crypto activity at a high level — what exchanges they used, whether they self-custodied, whether they engaged in mining, staking, DeFi, or NFT transactions, and whether foreign exchanges or wallets are involved.

This interview shapes the scope of the entire audit. Answers given here are difficult to walk back later. In our experience, taxpayers who attempt to handle the initial interview on their own almost always volunteer information the examiner had no independent way to obtain — and that volunteered information often becomes the basis for expanded audit scope.

What a tax attorney does at this stage: We typically attend (or handle) the initial interview on the client’s behalf, limit the scope to what is strictly relevant to the stated audit issues, and establish a document production protocol with the examiner that protects privilege and controls the pace of the examination.

Stage 3: Information Document Requests (IDRs)

The IDR is the workhorse of any crypto audit. Issued on Form 4564, an Information Document Request lists specific records the examiner wants and sets a deadline (typically 15 to 30 days) for response. In a cryptocurrency audit, IDRs commonly demand wallet addresses, exchange statements, cost basis documentation, DeFi and NFT records, foreign exchange activity, and communications with tax preparers.

Crypto audits typically involve multiple rounds of IDRs. The examiner reviews the initial response, identifies follow-up questions, and issues additional IDRs. Each round is an opportunity to narrow scope, establish favorable facts, and frame the narrative — or, handled poorly, to compound the examiner’s concerns.

We’ve written a separate in-depth guide on IRS IDRs in crypto audits because this stage is consequential enough to warrant its own treatment. At a high level, the key is that IDR responses are not document dumps — they are strategic communications that become part of the administrative record for any subsequent appeal or litigation.

Stage 4: Proposed Adjustments and the Examination Report

Once the examiner has gathered the records they consider sufficient, they prepare an examination report (generally Form 4549 for individual income tax adjustments or Form 5701 for notices of proposed adjustment). This report lists each proposed change to the return and calculates the resulting tax, interest, and penalty exposure.

In crypto audits, the most common proposed adjustments include recharacterization of transactions as taxable events the taxpayer did not report, reassignment of cost basis (often to zero, absent defensible records), reclassification of ordinary versus capital gain treatment, and the assertion of accuracy-related penalties under IRC Section 6662. FBAR and foreign information return penalties may be layered on where offshore exchange activity is involved.

The taxpayer has an opportunity to respond to the proposed adjustments before the report is finalized. This is not a token exercise. A well-crafted response, supported by reconstructed records and legal authority, frequently causes examiners to drop or reduce proposed adjustments before they ever leave the examination desk.

Stage 5: The 30-Day Letter and Protest to IRS Appeals

If the taxpayer and examiner cannot reach agreement at the examination level, the IRS issues a 30-day letter. This letter transmits the examination report and offers the taxpayer 30 days to file a written protest requesting review by the IRS Independent Office of Appeals.

IRS Appeals is procedurally and functionally independent from examination. Appeals officers have broader settlement authority than examiners and are instructed to weigh the “hazards of litigation” — meaning the likelihood that the IRS would lose all or part of its position in court. For crypto audits, where the law is still developing and where reasonable minds disagree on treatment of many transactions, the hazards-of-litigation standard often produces meaningful settlement movement.

A well-drafted protest is a consequential document. It states the facts, identifies the disputed adjustments, sets out the taxpayer’s legal position with authority, and presents the matter in a way that makes settlement attractive to the Appeals officer. This is an area where nearly two decades of federal tax controversy experience produces visibly different results than generic audit representation.

Important deadline: The 30-day response period is firm. Missing it forfeits the administrative appeal and typically accelerates the case toward a statutory notice of deficiency.

Stage 6: IRS Appeals Conference

If a protest is timely filed, the case is assigned to an Appeals officer who will schedule a conference. These conferences are generally informal and can be held by telephone, video, or in person. The Appeals officer reviews the administrative file, considers the protest and any supplemental submissions, and engages with the taxpayer’s representative to explore settlement.

In our experience, Appeals is often where crypto audits resolve. The Appeals officer’s independence, combined with broader settlement authority and the hazards-of-litigation framework, creates meaningful room to negotiate outcomes that examination would not offer. Matters that seem frozen at the examination level frequently move significantly at Appeals.

Settlement at Appeals is typically memorialized in a Form 870-AD (Offer of Waiver of Restrictions on Assessment and Collection of Deficiency in Tax and of Acceptance of Overassessment) or a closing agreement. Once signed, the matter is resolved and the tax is assessed according to the agreement.

Stage 7: The 90-Day Letter (Statutory Notice of Deficiency)

If Appeals does not resolve the case — or if the taxpayer did not protest to Appeals at the 30-day letter stage — the IRS issues a statutory notice of deficiency, commonly called a 90-day letter. This is a formal determination that triggers one of the most important deadlines in federal tax practice.

The taxpayer has 90 days from the date of the notice (150 days if the notice is addressed to a person outside the United States) to file a petition in U.S. Tax Court. If no petition is filed within the statutory period, the deficiency becomes final, the tax is assessed, and the taxpayer loses the right to contest the liability in Tax Court. At that point, the only remaining forum is to pay the tax and sue for refund in U.S. District Court or the Court of Federal Claims — a much more expensive and procedurally cumbersome path.

The 90-day deadline is jurisdictional. No extensions. No exceptions. A petition filed on day 91 is dismissed for lack of jurisdiction, full stop. If you have received a statutory notice of deficiency from a crypto audit, engage qualified tax counsel immediately — not next week.

Stage 8: U.S. Tax Court Petition and Litigation

Filing a timely Tax Court petition preserves the taxpayer’s right to challenge the IRS’s determination without first paying the tax. Tax Court is a specialized federal court with judges who exclusively hear tax cases. Cases can be designated as “small tax cases” (for deficiencies under $50,000 per year, with simplified procedures) or as regular Tax Court cases.

Filing a petition does not commit the case to trial. In practice, the majority of Tax Court cases settle before trial, often through IRS Counsel or a second trip to Appeals. The filing itself, however, preserves the taxpayer’s position and creates new settlement dynamics.

If the case proceeds to trial, the taxpayer presents evidence, calls witnesses, and argues the law before a Tax Court judge. For cryptocurrency cases, this may involve expert testimony on blockchain forensics, cost basis methodology, and technical characterization of DeFi or staking transactions.

Alex Kugelman is admitted to practice before the U.S. Tax Court and the U.S. Supreme Court, and has represented clients in U.S. Tax Court and U.S. District Court tax litigation. Our firm handles crypto audit matters through every stage, including trial, on a nationwide basis.

Stage 9: Assessment and Collection

Once the audit is fully resolved — by settlement, decision, or default — the IRS assesses the tax and begins collection. If the liability is not paid, the matter transitions from the examination side of the IRS to the collection side, and a different set of procedural rules governs. Options at that point include installment agreements, offers in compromise, currently not collectible status, and challenges through the Collection Due Process (CDP) procedure.

Collection defense is a distinct practice area. For resources on that phase, see our tax collections page.

Typical Timeframes and Realistic Expectations

Most federal cryptocurrency audits take 12 to 24 months from opening notice to resolution at the examination or Appeals level. Complex matters involving multiple years, DeFi or NFT activity, or foreign exchanges can run longer. Cases that proceed to Tax Court typically add another 12 to 24 months, though many settle before trial.

In matters we have handled, a $365,000 proposed tax debt was reduced to a zero-dollar liability, a multi-year audit and non-filing matter was resolved with minimal payment, and ten years of unfiled returns were resolved with a successful outcome. Results depend on specific facts. Past results do not guarantee future outcomes.

Why the Early Stages Matter Most

If there is one takeaway from this procedural walkthrough, it is this: the earlier in the audit you engage experienced tax counsel, the more options you preserve. Scope set at Stage 2 constrains the examination. Records produced at Stage 3 shape the administrative record for every subsequent stage. A protest filed at Stage 5 determines whether Appeals will even hear the case. A petition filed at Stage 7 determines whether Tax Court has jurisdiction.

By the time a taxpayer reaches Stage 8, many of the most favorable strategic decisions are already behind them. The best time to engage counsel is at Stage 1.

Nationwide Representation for Every Stage of a Crypto Audit

Federal cryptocurrency audits are federal matters, and Kugelman Law represents clients throughout the United States. Alex Kugelman is admitted to the U.S. Supreme Court and has nearly two decades of federal tax controversy experience, including U.S. Tax Court and U.S. District Court litigation. Our cryptocurrency specialization has been featured on the Bitcoin.tax podcast and The Mark Milton Show. Wherever you are located, if you are facing an IRS crypto audit, we can represent you at every stage.

Frequently Asked Questions About the Stages of a Crypto Audit

How long does an IRS cryptocurrency audit take?

Most crypto audits take between 12 and 24 months from opening notice to resolution, though complex matters involving multiple years, DeFi activity, or foreign exchanges can take longer. Matters that proceed to IRS Appeals or U.S. Tax Court extend further.

What is the difference between a 30-day letter and a 90-day letter?

A 30-day letter proposes adjustments at the close of examination and invites a protest to IRS Appeals. A 90-day letter, or statutory notice of deficiency, is a formal determination that gives the taxpayer 90 days to petition U.S. Tax Court or the deficiency becomes final and assessable.

Can I settle a crypto audit without going to court?

Most crypto audits are resolved at the examination or Appeals stage without litigation. IRS Appeals offers an independent review and broader settlement authority than examination. Litigation in U.S. Tax Court is always an option if Appeals does not reach a reasonable result.

When should I hire a tax attorney in a crypto audit?

Earlier is almost always better. Engaging counsel at the opening notice or first Information Document Request stage preserves strategic options, establishes attorney-client privilege, and often changes the trajectory of the entire audit.

Does the IRS audit cryptocurrency investors nationwide?

Yes. The IRS audits cryptocurrency taxpayers throughout the United States. The examination division uses blockchain analytics, exchange reporting, and John Doe summons data to identify audit candidates regardless of geography.

Under Audit? Engage Counsel at the Right Stage.

The earlier you engage experienced tax counsel, the more strategic options remain open. Kugelman Law offers paid, privileged consultations with founder Alex Kugelman — fully protected by attorney-client privilege — at any stage of a cryptocurrency audit, from opening notice through U.S. Tax Court.

Call (415) 968-1780 or contact Kugelman Law to schedule your consultation.

About the Author

Alex Kugelman is the Founder and Managing Attorney of Kugelman Law, a boutique tax controversy and cryptocurrency tax law firm representing clients nationwide. He is admitted to the California Bar (2008, No. 255463) and the U.S. Supreme Court, and is a member of the American Bar Association, the California State Bar, and the Federal Bar Association, where he served as San Francisco Chair of the FBA Tax Division in 2018. Alex also serves on the Marin County Assessment Appeals Board. He holds a J.D. from Chapman University Fowler School of Law (2007) and a B.A. in English Literature from the University of Colorado at Boulder (2001).

With nearly two decades of federal tax controversy experience — including U.S. Tax Court and U.S. District Court litigation — Alex is nationally recognized for his cryptocurrency tax specialization and has been featured on the Bitcoin.tax podcast and The Mark Milton Show.

Related Kugelman Law Resources

• Cryptocurrency Accounting & Audits
• Tax Audits
• U.S. Tax Court Litigation
• Tax Collections
• Tax Help

This article is for general informational purposes only and does not constitute legal advice. Reading this article does not create an attorney-client relationship with Kugelman Law. Results depend on specific facts. Past results do not guarantee future outcomes.