Most IRS audits are resolved on paper — but every examination carries deadlines, document demands, and appeal rights that matter. Understand the types of audits, how the IRS selects returns, and how to protect yourself at each step.
An audit is the IRS's review of your return to confirm that income, deductions, and credits were reported correctly. Being selected doesn't necessarily mean you did anything wrong — and the process follows predictable steps.
Many returns are pulled by statistical scoring or because they connect to another taxpayer's audit. A measured, well-documented response is almost always the right first move — not panic.
Straight from the source: the IRS overview, IRS Audits, explains how returns are selected, how audits are conducted, and your rights as a taxpayer.
Not all audits are equal. The format the IRS chooses signals how serious — and how document-intensive — the examination is likely to be.
The most common type of audit by far. The IRS sends a letter — often a CP2000 for income mismatches or a CP75 for credits — asking you to verify specific items such as a deduction, a credit, or income that doesn't match a third-party form like a W-2 or 1099.
You respond by mail or fax with copies of supporting documents; there's no in-person meeting. Most correspondence audits focus on one or two issues — but ignoring the letter turns a narrow inquiry into a full proposed assessment.
The IRS asks you to bring records to a local IRS office for an in-person interview with an examiner. Office audits are broader than mail audits and usually involve several items — for example, business income, itemized deductions, or filing status.
Bringing organized records — and ideally a representative — makes a real difference. You're allowed to have an attorney, CPA, or enrolled agent attend in your place.
The most comprehensive type. A revenue agent visits your home, place of business, or your representative's office to examine your books and records in depth. Field audits are typical for businesses, the self-employed, and higher-complexity returns.
Because the agent can review your full operation, the scope can expand quickly. Representation is strongly advisable from the very start.
If you claimed the Earned Income Tax Credit or certain other refundable credits, the IRS may send a CP75 or CP75A holding your refund until you prove eligibility — for example, that a child meets the relationship, age, and residency tests.
These are document-verification audits. Responding with the right proof — school, medical, or residency records — is usually enough to release the refund.
Returns are chosen several ways: statistical scoring (the IRS compares your return to “norms” built from its National Research Program), document mismatches (reported income that doesn't match W-2s or 1099s), and related examinations (a business partner, investor, or other taxpayer connected to your return was audited).
A couple of myths worth retiring: filing an amended return doesn't automatically trigger an audit, and receiving a refund is not, by itself, a trigger.
How you handle the first response often shapes the entire outcome. A few principles apply to almost every examination.
Read the letter carefully to see exactly which items and which tax years are under review, then confirm the IRS received your response — use certified mail or a delivery service with confirmation.
Provide the specific documents the IRS asks for — receipts, bank statements, mileage logs, 1099s, and similar records. Send copies, never originals, and keep a complete set for yourself.
Volunteering extra information can widen the scope of the audit. Answer what's asked — completely and accurately — and no more.
For mail audits, you can usually get a one-time automatic 30-day extension by faxing or mailing the request shown on your letter. For in-person audits, contact the assigned examiner — or their manager — to reschedule.
You never have to face the IRS alone. You can authorize an attorney, CPA, or enrolled agent to deal with the examiner on your behalf — including attending interviews in your place — using Form 2848, Power of Attorney.
Every audit closes one of three ways — and if you disagree, you have real options before anything becomes final.
You substantiated everything under review and the IRS proposes no changes. The audit closes with nothing owed — the best possible result.
The IRS proposes changes and you understand and agree with them. You sign the examination report. If you owe a balance, payment options include an installment agreement and, in some cases, an offer in compromise.
You understand the proposed changes but disagree. You can request a conference with the examiner's manager, use IRS mediation (alternative dispute resolution), or file a formal appeal with the IRS Independent Office of Appeals — as long as time remains on the statute of limitations.
If the IRS issues a Notice of Deficiency, you then have 90 days to petition the U.S. Tax Court — without paying the disputed tax first.
The IRS generally audits returns filed within the last three years. A substantial error can extend that window, but it usually won't go back more than six years. Most audits cover returns filed within the last two years.
Not necessarily. Many returns are selected by statistical formulas or because they're linked to another taxpayer's audit. An audit is a verification process — with good records and a measured response, many close with little or no change.
It varies widely with the type of audit, the complexity of the issues, how quickly documents are provided, and whether you agree with the findings. Correspondence audits can wrap up in a few months; field audits may take considerably longer.
For a simple one-issue mail audit, you may be able to respond yourself. For office audits, field audits, large dollar amounts, or anything touching potential fraud or unreported income, representation is strongly advisable — and you have the right to it.
Whatever supports the items being examined: receipts, invoices, bank and credit-card statements, mileage logs, 1099s and W-2s, and similar documentation. The IRS letter lists what it wants. Keep records at least three years from the date you filed. Obtaining your IRS transcripts can also help confirm what the IRS already has on file.
You still have options. Depending on your situation you may qualify for an installment agreement, penalty relief, or an offer in compromise. Disagreeing with the amount is separate from paying it — appeal rights and payment options can both be on the table.
A flat-fee consultation gives you a clear read on your examination — what the IRS is really asking for, what to hand over, and how to respond before the deadline.