Chances of Getting Audited by the IRS: Rates, Triggers, and Timeline

Your chances of getting audited by the IRS are roughly 1 in 500 if you’re a typical individual filer. The overall audit rate for individual returns sits at about 0.2%, meaning 99.8% of returns go unexamined in any given year.1Internal Revenue Service. Internal Revenue Service Data Book, 2024 That average hides a lot. Income level, the kinds of deductions on your return, and whether you hold assets like foreign accounts or cryptocurrency all move the odds up or down, sometimes by a factor of ten or more.

Audit Rates by Income

The IRS publishes audit coverage rates in its annual Data Book. The most recent complete numbers cover Tax Year 2022 returns examined through the end of Fiscal Year 2024:1Internal Revenue Service. Internal Revenue Service Data Book, 2024

  • Under $25,000: 0.4% (driven largely by Earned Income Tax Credit examinations)
  • $25,000 to $50,000: 0.2%
  • $50,000 to $200,000: 0.1%
  • $200,000 to $500,000: 0.1%
  • $500,000 to $1 million: 0.6%
  • $1 million to $5 million: 1.1%
  • $5 million to $10 million: 3.1%
  • $10 million or more: 4.0%

If you earn between $50,000 and $200,000, the odds sit closer to 1 in 1,000. Once income crosses $1 million, the rate jumps more than tenfold. The very low-income bracket looks like an outlier because it is: a large share of those audits are correspondence reviews of EITC claims, not deep examinations.

Why the Snapshot Understates High-Income Audits

Complex examinations often don’t open until years after a return is filed. When the IRS eventually tallies every audit completed for a given tax year, the rates for top earners climb well above the initial snapshot. For Tax Year 2019, returns reporting $10 million or more had an 11.0% examination rate by the time the statute of limitations closed.2Internal Revenue Service. Compliance Presence A 4% rate in year one can become double digits by year three or four.

Congress provided the IRS with substantial additional enforcement funding in 2022, and the agency has publicly committed to raising audit rates on taxpayers earning above $400,000 while holding rates steady for everyone below that threshold.

What Actually Triggers an Audit

The DIF Score

The IRS’s primary screening tool is the Discriminant Function System, or DIF. Every return receives a computer-generated score based on how its numbers compare to statistical norms for similar taxpayers. The higher the score, the more unusual your return looks relative to people with comparable income, filing status, and occupation. Returns with the highest scores get pulled for manual review by a classifier, who decides whether to open a formal examination.3Internal Revenue Service. The Examination (Audit) Process A companion model called UIDIF rates returns for the likelihood of unreported income.

The formulas aren’t public, but the principle is simple: the further your return deviates from what the IRS expects to see from someone in your situation, the more likely it is to get flagged. A $300,000 charitable deduction on $90,000 of income draws attention. The same deduction on $2 million of income might not.

Information Matching

Before DIF even runs, the IRS already knows most of your income. Employers, banks, brokerages, and other payers send copies of every W-2 and 1099 to the IRS. The Automated Underreporter program compares those third-party filings against what you reported.4Internal Revenue Service. IRM 4.1.27 Document Matching, Analysis and Case Selection If a brokerage reports $8,000 in dividends and you reported $3,000, the system catches it automatically. The resulting notice, usually a CP2000, isn’t technically an audit, but it proposes additional tax and demands either payment or an explanation.

Predictive Modeling

The IRS has moved past static scoring. Machine learning systems now run in iterative passes throughout the filing season. One model targets complex partnerships like hedge funds and private-equity structures. Another, the Line Anomaly Recommender, flags corporate returns with $10 million to $250 million in assets. For individual returns, a newer AI tool identifies the top issues most likely to need adjustment on each return and hands examiners a starting point.

Specific Red Flags

Certain items on a return raise the audit odds meaningfully:

  • Schedule C losses year after year. Under the hobby loss rule, an activity is presumed to be for profit if it shows a net profit in at least three out of five consecutive years. Four straight years of losses on a side business invites the IRS to reclassify it as a hobby and disallow the deductions.5Office of the Law Revision Counsel. 26 US Code 183 – Activities Not Engaged in for Profit
  • Claiming 100% business use of a vehicle. Without a separate personal vehicle and a contemporaneous mileage log, that claim is difficult to sustain.
  • Itemized deductions that are outsized for your income bracket, especially charitable contributions and unreimbursed expenses. Round-number expenses ($5,000, $3,000) reinforce the impression of estimation rather than recordkeeping.
  • Cash-intensive businesses. Restaurants, salons, and similar operations get extra scrutiny because their income is harder to verify electronically. The IRS may use indirect methods like bank deposit analysis to test whether reported income is realistic.
  • EITC claims. The credit has a high error rate, and the IRS examines EITC returns at roughly four to five times the overall individual audit rate. Most are correspondence audits asking for proof of a qualifying child’s residency, relationship, and age.6Taxpayer Advocate Service. EITC Audits Will Once Again Begin; Proactively Responding to an EITC Audit Is Crucial
  • Foreign accounts. If your foreign financial accounts exceeded $10,000 in combined value at any point during the year, you must file FinCEN Form 114. The base civil penalty for a non-willful failure is up to $10,000 per violation, and willful violations run the greater of $100,000 or 50% of the account balance.7Financial Crimes Enforcement Network. Report Foreign Bank and Financial Accounts8Office of the Law Revision Counsel. 31 US Code 5321 – Civil Penalties
  • Digital assets. Form 1040 asks directly whether you received, sold, exchanged, or otherwise disposed of any digital asset during the year. Answering “no” when third-party data suggests otherwise creates the same mismatch that catches unreported wage or dividend income. Form 1099-DA is being phased in to require brokers to report digital-asset proceeds much like stock sales.9Internal Revenue Service. Digital Assets10Internal Revenue Service. Treasury, IRS Issue Proposed Regulations to Make It Easier for Digital Asset Brokers to Provide 1099-DA Statements Electronically

During any audit, the burden falls on you to prove every deduction. Receipts, bank statements, mileage logs, and other contemporaneous records are what stand up.11Internal Revenue Service. Burden of Proof Travel, entertainment, gifts, and vehicle expenses require the most detailed documentation. Without it, the deduction gets disallowed whether the spending happened or not.

What an Audit Actually Looks Like

Not every audit is an agent across a table from you. Format depends on complexity:12Internal Revenue Service. IRS Audits

  • Correspondence audit. Handled by mail. The IRS asks you to substantiate one or two specific items; you mail back your documentation. These make up the majority of individual audits and typically wrap up in three to six months.
  • Office audit. You bring your records to a local IRS office for in-person review. Broader in scope than correspondence, still limited.
  • Field audit. A revenue agent comes to your home, business, or representative’s office. Reserved for complex returns, businesses, and high-net-worth individuals. Can take a year or more.

The IRS always contacts you initially by mail. Anyone calling and demanding immediate payment is running a scam. You have the right to professional representation, whether that’s an enrolled agent, CPA, or tax attorney, at every stage.

How Long the IRS Has to Audit You

The IRS generally has three years from the date you file to assess additional tax.13Office of the Law Revision Counsel. 26 US Code 6501 – Limitations on Assessment and Collection Three exceptions extend or eliminate that window:

  • If you omit more than 25% of your gross income, the window doubles to six years.
  • If the IRS proves fraud by clear and convincing evidence, there is no time limit at all.
  • If you never file a return, the clock never starts.

Your record retention should track these timelines. The IRS recommends keeping tax records at least three years after filing, six years if there is any chance of a substantial income omission, and seven years if you claimed a deduction for worthless securities or bad debt.14Internal Revenue Service. How Long Should I Keep Records? Records tied to property you still own, such as a home purchase settlement statement or improvement receipts, should be kept until you sell and the statute of limitations for that year’s return runs out.