Legal Information Notice
This guide provides general educational information about IRS audits. It is not legal or tax advice. If you have received an IRS audit notice, consult a licensed tax attorney or enrolled agent before responding. Do not ignore IRS correspondence — deadlines are real and missing them has serious consequences. Reading this does not create an attorney-client relationship.
First: Don't Panic — But Don't Ignore It
Receiving an IRS notice is unsettling, but most IRS contacts are not full audits. The IRS sends millions of notices each year for routine matters — math corrections, mismatched information returns, identity verification. Understanding exactly what type of contact you have received is the first step.
The most important rule: do not ignore IRS correspondence. Every IRS notice has a deadline. Missing it can waive your rights, result in automatic assessment of additional tax, or escalate a manageable situation into a serious one.
Types of IRS Audits
1. Correspondence Audit (Most Common)
Conducted entirely by mail. The IRS requests documentation for one or more specific items on your return — typically a deduction, credit, or income item. You respond with supporting documents. These are the most common type of IRS audit and, when properly handled, are often resolved without significant changes. Common correspondence audit notices include CP2000 (proposed changes based on third-party information), CP05 (identity and refund verification), and Letter 525 (examination of specific items).
2. Office Audit
Conducted at an IRS office. You bring documentation supporting specific items the IRS has identified. These are more involved than correspondence audits and may require representation by a tax attorney or enrolled agent.
3. Field Audit
Conducted at your home or business by an IRS Revenue Agent. These are the most thorough type of audit and typically involve complex tax issues, business returns, or large discrepancies. Professional representation is strongly advisable for field audits.
4. TCMP / Research Audits
Random selection audits with no specific trigger — used by the IRS to develop statistical models. Comprehensive and time-consuming, but relatively rare.
Common IRS Audit Triggers
The IRS uses a computer scoring system (the Discriminant Information Function, or DIF) to identify returns that deviate significantly from statistical norms. Common factors that increase audit risk:
- Unusually large deductions relative to income (especially charitable contributions, business expenses, or home office)
- Claiming business losses multiple years in a row (hobby loss rules)
- High cash-based business income with round-number expenses
- Income not matching third-party Forms 1099 or W-2
- Large Schedule C (self-employment) losses
- Cryptocurrency transactions not reported or underreported
- Foreign bank accounts or assets not reported (FBAR/FATCA)
- Very high income — returns over $1 million face higher audit rates
- Mathematical errors or inconsistencies on the return
Your Rights During an IRS Audit
The IRS Taxpayer Bill of Rights (TBOR) provides critical protections. Every taxpayer has the right to:
- Be informed about the audit process and what the IRS is examining
- Professional representation by a tax attorney, CPA, or enrolled agent at any stage
- Record interviews with the IRS (with advance notice)
- Only be asked for information relevant to the tax year and items under examination
- Appeal IRS findings to the Independent Office of Appeals
- Have a final independent review by the U.S. Tax Court, U.S. District Court, or Court of Federal Claims
- Stop an interview at any time to consult with a representative
The Most Important Audit Rule: Get Representation Early
Many taxpayers attempt to handle an IRS audit on their own and inadvertently provide information that expands the scope of the audit, creates new issues, or waives procedural protections. A tax attorney or enrolled agent knows what the IRS can and cannot request, how to present documentation effectively, and when to push back.
Early representation — before the first response to the IRS — typically produces better outcomes than bringing in a professional after the process has gone sideways. The cost of representation is almost always justified by the reduction in tax, penalties, and interest that results from professional handling.
General information. Consult a licensed tax attorney or enrolled agent before responding to any IRS audit notice.
The Audit Process Step by Step
Receive and Identify the Notice
Read carefully. Identify: the tax year under examination, the specific items being questioned, the deadline for response, and the type of audit. Do not respond before you fully understand what is being asked.
Consult a Tax Professional
Before responding to any audit notice — especially an office or field audit — consult a tax attorney, CPA, or enrolled agent. They will review your return, assess the strength of your position, and advise on the best response strategy.
Gather Documentation
Organize records supporting the items under examination — receipts, bank statements, contracts, logs. Only provide what is specifically requested. Never volunteer additional information beyond what the audit requires.
Respond by the Deadline
Respond clearly, completely, and by the stated deadline. If you need more time, a one-time extension is typically available for correspondence audits. Missing a deadline can result in automatic assessment or loss of appeal rights.
Review the IRS's Findings
If the IRS proposes changes, you will receive a 30-day letter. You can agree (and pay any additional tax, penalties, and interest), request an appeal to the IRS Independent Office of Appeals, or — ultimately — petition the U.S. Tax Court.
Appeal if Warranted
The IRS Independent Office of Appeals resolves the majority of disputed audit cases without litigation. An Appeals Officer reviews the case independently and can reduce or eliminate proposed deficiencies. Most audit disputes are better resolved at Appeals than in Tax Court.