How to Handle an IRS Audit: A Complete Guide
Types of IRS Audits
Not all audits are the same. Most are far less dramatic than people fear. Understanding which type you face is the first step:
Correspondence Audit (Most Common)
The IRS mails you a letter asking for documentation to support a specific item on your return — a charitable deduction, a home office claim, or a business expense. You respond by mail with the requested documents. These are resolved without any in-person meeting and account for roughly 75% of all audits. A CPA can handle the entire response on your behalf.
Office Audit
You are asked to appear at an IRS office and bring specific records. These are more serious than correspondence audits and typically involve a broader review of your return. You have the right to bring a CPA, Enrolled Agent, or tax attorney to represent you. You do not need to attend yourself if your representative has a properly signed Power of Attorney (Form 2848).
Field Audit
An IRS agent comes to your home, business, or accountant's office to conduct an examination. Field audits are reserved for complex returns — typically businesses, high-income individuals, and complex tax situations. Having a CPA manage the field audit and serve as the primary point of contact is strongly advisable.
What to Do When You Receive an IRS Notice
- Read it carefully. IRS notices are specific — they request particular documents or ask you to confirm or dispute a specific figure. Not all IRS letters are audits.
- Don't panic. Many notices are routine — a CP2000 notice proposing additional tax based on 1099 income not reported is often resolved by providing the correct information.
- Contact your CPA immediately. Forward the notice and the relevant return to your CPA. Do not respond to the IRS yourself without professional guidance on complex matters.
- Respond by the deadline. IRS notices include a response deadline. Missing it leads to automatic assessments that are harder and more expensive to reverse.
How a CPA Helps During an Audit
- Reviews the notice and identifies exactly what the IRS is examining
- Gathers and organizes documentation to substantiate each questioned item
- Prepares a written response that addresses the IRS's concerns in the language auditors expect
- Represents you at any IRS meetings (with Form 2848 authorization) so you never have to face an auditor alone
- Negotiates any proposed adjustments and files appeals if the initial response is rejected
Your Rights During an Audit
The IRS Taxpayer Bill of Rights guarantees you the right to professional representation, the right to privacy and confidentiality, the right to appeal IRS decisions, and the right to a fair and just tax system. You are never required to speak directly with an IRS auditor if you have an authorized representative. Exercise this right.
Preventing Future Audits
- Keep receipts and documentation for every deduction claimed
- Report all income — the IRS matches 1099s and W-2s to your return automatically
- Avoid disproportionately large deductions without solid documentation
- File on time, or file an extension — do not ignore deadlines
- Work with a CPA so your return is prepared correctly the first time
Find a CPA who includes audit support in their engagement by browsing our city directory.
Frequently Asked Questions
- What triggers an IRS audit?
- Common audit triggers include reporting income significantly below the average for your occupation, claiming unusually large deductions relative to income (especially home office and vehicle deductions), math errors on your return, claiming 100% business use of a vehicle, large charitable contributions relative to AGI, and cryptocurrency transactions. The IRS also conducts random audits through its Discriminant Information Function (DIF) scoring system.
- Do I need a CPA or tax attorney for an IRS audit?
- For correspondence audits (the most common type), a CPA is usually sufficient. For field audits or office audits involving significant amounts, complex issues, or potential fraud allegations, you should have a CPA or Enrolled Agent represent you. If there is any possibility of criminal tax fraud, engage a tax attorney immediately before speaking with the IRS.
- How long does an IRS audit take?
- Correspondence audits typically resolve in 3–6 months. Office audits take 6–12 months. Field audits can run 12–24+ months for complex cases. The IRS generally has 3 years from the return due date to initiate an audit (6 years if you understated income by more than 25%, and no statute of limitations for fraud).