IRS Audits

Chances of Being Audited in 2027: Your Real Odds, by Income and Situation

By Angeline Balsitis, EA · Reviewed by Melissa Ly, Chief Tax Officer · Published October 8, 2025 · Updated July 7, 2026 · Editorial Standards

You're searching "chances of being audited 2027" for a reason — maybe this is your first return filed alone since the divorce, with a new filing status, a child you and your ex both feel entitled to claim, and a retirement cash-out you're not sure how to report. That uncertainty is exactly where audit anxiety lives.

Here's the good news: the odds are knowable, most of them are small, and the flags that raise them are specific and avoidable. This guide gives you the numbers by situation, the divorce-year mistakes that actually get caught, and what to do if the IRS writes.

Your real chances of being audited in 2027

Fewer than 4 out of every 1,000 individual tax returns are audited in a typical year — roughly 0.3% to 0.4%, based on historical IRS Data Book coverage rates. The IRS doesn't publish 2027 rates in advance, but with the IRS workforce reportedly cut by roughly 27% in 2025, the direction for human-led exams is down, not up.

That average hides huge variation. Refundable credits, self-employment income, and very high incomes all carry multiples of the base rate, while a plain W-2 return with the standard deduction sits well below it. Here's how the odds actually break down — for the full income-band data, see our page on the IRS audit rate by income.

Notice what dominates that table: it's not randomness. It's whether the numbers on your return can be checked against something. When they can't — or when they don't match — your odds climb.

Why the IRS picks a return — and why a divorce year raises the score

The IRS scores every return with a computer formula — the DIF score — before any human ever looks at it. Returns whose deductions, credits, or income patterns sit far from the norm for their income band score higher; the highest scores get pulled for classification, and a subset become exams. The other big selection engines are pure document matching and "related pickups" — when one return is examined, returns connected to it (including an ex-spouse's) can be pulled too.

A divorce year concentrates several classic mismatches onto one return:

• Two parents claiming the same child. The second e-filed return claiming a dependent's SSN gets rejected or flagged automatically — no examiner required. If this is your situation, our guide to both parents claiming the same child walks through the tiebreaker rules. A signed Form 8332 releasing the claim prevents the fight before it starts.
• A new head of household claim. HOH requires paying more than half the cost of a home for a qualifying person for more than half the year. Two exes both claiming HOH from the same former household is an easy screen.
• Alimony reported inconsistently. For divorces finalized after 2018, alimony is neither deductible by the payer nor taxable to the recipient. Deduct it anyway — or report it differently than your ex does — and the mismatch is mechanical.
• Retirement money split or cashed out. Every 401(k) distribution generates a Form 1099-R the IRS matches. Money moved under a QDRO and paid to the ex-spouse is treated differently than money you cash out yourself — mixing those up is expensive, as the worked example below shows.

Outside the divorce context, the perennial risers are the ones covered in our full list of IRS audit triggers: unreported income, outsized deductions, and cash-intensive self-employment — the last of which has its own playbook in our cash business audit guide.

The letter you're far more likely to get: CP2000, not an audit

For every taxpayer who gets a true audit, several more get a CP2000 notice — an automated proposal generated when income reported to the IRS doesn't match a return, with no examiner involved at all. If your practical question is "will the IRS notice X," the honest answer is: if X came with a W-2, 1099, W-2G, or 1099-R, the computer will almost certainly notice, staffing cuts or not.

This distinction matters because a CP2000 is both easier and more dangerous than people expect. Easier, because it's resolved by mail with documentation. More dangerous, because the proposed numbers are often wrong in the IRS's favor — they ignore basis, withholding already paid, and offsetting deductions — and agreeing without checking the math is the single most common CP2000 mistake.

A worked example: the divorce-year 1099-R the computer will catch

Say you're recently divorced and cashed out $31,200 from your 401(k) in 2026 to cover legal fees and the equity buyout. The plan withheld 20% ($6,240), and in the chaos of the move the 1099-R never made it into your return. This is hypothetical — but the math is exactly what the Automated Underreporter system would propose:

• Income tax at a 24% marginal rate: $31,200 × 24% = $7,488
• 10% early-withdrawal penalty (you're under 59½): $31,200 × 10% = $3,120
• Total additional tax: $10,608, minus the $6,240 already withheld = $4,368 owed
• If the understatement is substantial — more than the greater of $5,000 or 10% of the tax that should have been shown — the IRS can add a 20% accuracy-related penalty; on an understatement of $4,368 it generally would not apply
• Running total before interest: roughly $4,368 — with interest compounding daily from the return's original due date

Two lessons hide in that math. First, the withholding you already paid gets credited — the CP2000 headline number is rarely what you truly owe. Second, if that $31,200 had been transferred under a QDRO and paid out to your ex as the alternate payee, the $3,120 early-withdrawal penalty wouldn't apply at all. Sequencing the divorce paperwork correctly is worth real money. You can estimate what a proposed adjustment would cost in penalties and interest with our Penalty & Interest Calculator, and if the resulting bill is the real problem, our guide to the early-401(k)-withdrawal tax bill covers the payment side.

What happens if you're selected — and ignore the letters

An ignored audit doesn't stall; it ends in an assessment you can no longer easily dispute. Whether the opening letter is a CP2000, an exam notice like Letter 566, or a mail audit handled entirely by correspondence, the sequence runs on its own schedule — and every stage you skip surrenders a right:

1. Opening contact. A CP2000 proposal or an examination letter (Letter 566 or similar) arrives by mail, naming the year and the items in question. This is the cheapest stage to respond — your documentation gets full weight.
2. Proposed changes. If you don't respond, or the examiner disagrees, you get an exam report (Letter 525 or 915) — the "30-day letter." You can still agree, negotiate, or protest to the IRS Independent Office of Appeals.
3. Statutory notice of deficiency (CP3219A). Miss the report stage and the 90-day letter issues. You have exactly 90 days — fixed by statute — to petition the U.S. Tax Court before the tax becomes final.
4. Assessment. After the 90 days pass, the proposed tax, penalties, and interest are assessed. Your dispute rights narrow sharply; audit reconsideration is the fallback, not a guarantee.
5. Collection. The assessed balance enters the normal collection stream — a CP14 bill, escalating notices, and eventually lien and levy authority. What began as an unanswered letter is now a debt with teeth.

Your options if an audit ends with a bill

An audit that ends with a balance due drops you into the same IRS collection system as any other tax debt — with the same programs available. Which one fits is a math question, not a marketing one:

Interest and late-payment penalties keep accruing on any plan, so the arithmetic favors resolving the exam itself first — a disputed adjustment knocked down at the report stage is worth more than any payment plan on the inflated number.

How to lower your audit odds for 2027, step by step

1. Pull your wage and income transcript. Before you file, verify every W-2, 1099, and 1099-R the IRS has on record for your SSN — that list is exactly what the matching computers will compare against your return. Our walkthrough on the IRS wage and income transcript shows how.
2. Match the divorce paperwork to the return. Confirm in writing who claims which child, attach Form 8332 if you are releasing the claim, and report alimony consistently with your decree's date.
3. Report every dollar, then take every legitimate deduction. Flags come from omissions and disproportion, not from claiming what you can document.
4. Keep contemporaneous records. Custody calendars, school and medical records, mileage logs, and receipts made at the time beat reconstructions in every type of exam.
5. Answer the digital-asset question accurately. Exchange reporting reaches the IRS whether or not you report it, and an inconsistent answer is an easy screen.

When you can handle this yourself — and when help changes the outcome

Most audit-odds anxiety needs information, not representation. You can confidently handle it yourself when you're simply filing a clean return, when a CP2000 flags an item you agree with and the corrected balance is one you can pay, or when the fix is producing a document you already have — a Form 8332, a 1099-R, a closing statement.

Experienced help changes outcomes in a narrower set of situations: an exam covering multiple years or spilling onto a business return, an EITC or dependent audit where residency proof is contested — see our guide to EIC audit proof of residency — a proposed balance large enough that Appeals strategy matters, or any exam where the underlying facts could look worse than they are. That last category, where an innocent-looking audit sits on top of genuinely risky history, is what practitioners call an eggshell audit, and it's the one situation where answering questions freely can hurt you. And if your records are thin or gone, being audited with no receipts is survivable — but reconstruction is a skill worth borrowing.

Terms in audit selection, decoded

• Examination (audit): a formal IRS review of a return's items, by mail, at an IRS office, or in the field — distinct from automated matching.
• DIF score: the computer score every return receives; high scores get pulled for possible exam.
• AUR / CP2000: the Automated Underreporter program, which proposes tax changes when third-party documents don't match a return.
• Correspondence audit: an exam conducted entirely by mail — the most common audit type by far.
• Statute of limitations (assessment): the window — generally 3 years from filing — in which the IRS can audit and assess more tax.
• Notice of deficiency: the "90-day letter" (CP3219A) giving you a fixed right to contest proposed tax in Tax Court before it's assessed.

Chances of being audited: your questions answered

Your next 24 hours

1. List what the IRS already knows. Log into your IRS online account or pull your wage and income transcript, and list every W-2, 1099, and 1099-R filed under your SSN for the year — that list is what the computers will match your return against.
2. Gather the divorce-year file. Put the decree, any signed Form 8332, custody records, retirement distribution paperwork, and last year's return in one folder — the documents that answer 90% of divorce-year IRS questions.
3. Get a free case review if something's already off. If an IRS letter has arrived, or you know your return has a mismatch, talk it through before you respond — interest and penalties accrue on any balance the IRS proposes, so earlier is cheaper. Call (888) 825-7779 or use the 2-minute form.

For the underlying data, the IRS publishes its examination coverage rates each year in the IRS Data Book; its own explainer of the matching notice most filers actually receive is at Understanding your CP2000 notice; and if an IRS delay or error is causing you hardship, the independent Taxpayer Advocate Service can intervene at no cost.

This guide is general information, not tax or legal advice for your specific situation. Eligibility for IRS programs depends on individual facts and circumstances; no outcome is guaranteed.

Related: see how far back the IRS can audit, whether IRS layoffs mean you'll still get audited, and the full list of IRS audit triggers — or browse all guides.