Getting an envelope from the IRS is one of those quietly terrible feelings. The good news: most "audits" in 2026 are nothing close to the dramatic conference-room scene people imagine. They're letters. Sometimes they want a document; sometimes they want an explanation; sometimes they're just wrong.
This guide walks you through the real types of audits and what to do at each step.
What changed in 2026
- IRS funding shifts. The Inflation Reduction Act expanded enforcement budgets through 2031, but appropriations have been adjusted multiple times. Audit rates have ticked up modestly, mostly on high earners.
- Most audits remain correspondence-only. Roughly three-quarters of all individual exams are handled by mail.
- AI-assisted matching catches more discrepancies. 1099 mismatches, crypto reporting, and unreported gig income trigger more automated CP2000 notices than ever.
The 5 levels of IRS contact
- CP2000 notice — automated under-reporting notice. Not technically an audit. Easiest to resolve.
- Correspondence audit — letter requests documentation for specific deductions or items.
- Office audit — in-person at an IRS office. More serious; usually a few specific questions.
- Field audit — IRS agent visits your business or home. Rare for individuals; common for small businesses with complex returns.
- CID investigation — Criminal Investigation Division. Hire a tax attorney immediately; do not respond on your own.
1. The CP2000 notice — most common, least scary
This says: "Our records don't match your return. Here's our proposed adjustment." Compare what they have to what you reported. If they're right, sign and pay. If they're wrong, write a clear response with documentation.
The trade-off: deadlines are real. You typically have 30 days to respond. Missing the deadline turns a polite request into a bill plus interest.
2. The correspondence audit — manageable solo, easier with help
The letter will list specific items in question — usually deductions like business expenses, charitable contributions, or home office. Send the requested documents (receipts, mileage logs, bank statements). Be organized; respond once with everything they need.
The trade-off: the IRS doesn't accept "I lost the receipts." If your records are weak, hiring a CPA or EA who can reconstruct documentation through bank records is worth the $300–$1,500 fee.
3. The office or field audit — bring a pro
These involve a sit-down with a revenue agent. The agent has specific questions but can expand scope if they find issues. Speaking on your own behalf is legally allowed and frequently a mistake. Hire a CPA, Enrolled Agent, or tax attorney to attend with (or instead of) you.
The trade-off: cost. Expect $1,500–$5,000+ for full representation through resolution. It's almost always worth it relative to the assessments and penalties at stake.
Comparison: types of IRS contact in April 2026
| Type |
Risk level |
Typical resolution |
Pro recommended? |
| CP2000 |
Low |
30–60 days, mailed response |
Optional |
| Correspondence audit |
Low–medium |
60–180 days |
Optional |
| Office audit |
Medium |
3–6 months |
Yes |
| Field audit |
High |
6–18 months |
Yes |
| CID investigation |
Very high |
1–3 years |
Tax attorney, immediately |
Common mistakes to avoid
Volunteering information. Answer what's asked, not more. Off-hand comments expand scope.
Ignoring deadlines. Every IRS letter has a deadline. Calendar it the day it arrives. Missing one converts a question into an assessment.
Hiring "tax resolution" radio companies. Most are sales operations, not tax pros. A local CPA or EA at $200/hr is almost always a better deal.
FAQ
How likely am I to be audited?
Under 0.5% of individual returns each year. Rates rise steeply for incomes over $1M and for returns with large Schedule C losses.
Should I represent myself?
For a CP2000 with clean records, yes. For anything in person, no.
How far back can the IRS audit?
3 years generally, 6 years for substantial under-reporting (over 25%), forever for unfiled returns or fraud.
Where to go next
For related guides see How to amend a tax return in 2026, Self-employed tax deductions for 2026, and Quarterly estimated taxes guide for 2026.