While it is impossible to absolutely guarantee you will never be audited, the probability is extremely low for most taxpayers, with less than 1% of individual returns audited annually. The odds increase for high-net-worth individuals ( > $ 1 > $ 1 million, 12.5 % 1 2 . 5 % audit rate), complex returns, and those with specific red flags.
While the overall individual audit rates are extremely low, the odds increase significantly as your income goes up (especially if you have business income). According to IRS audit statistics, about 0.4% of total individual returns get audited by the IRS.
The overall odds of an IRS audit are low, about 4 out of every 1,000 returns. However, high-net-worth individuals are more likely to be targeted due to complex income sources, large deductions, and sophisticated financial structures.
While most taxpayers' chance of audit is less than 1%, the odds increase once you earn $500,000 or more in taxable income. Those reporting more than $10 million have the highest risk of a tax audit. To make the most of its resources, the IRS focuses on examinations where it feels more tax liability can be uncovered.
Many people worry about IRS audits. But the chances of being audited are actually very low for most individuals. Recent IRS data shows the IRS examined 0.40% of individual returns filed and 0.66% of corporation returns filed. Most of the IRS's focus is on large businesses and high-income earners.
The IRS $600 rule refers to a change in reporting requirements for third-party payment apps (like Venmo, PayPal) for taxable income from goods and services, where platforms must send a Form 1099-K if you receive over $600 in a year, intended to capture gig economy/side hustle income, though delays and phased implementation have adjusted the timeline, with current rules for 2024 using a higher threshold ($5,000) before fully phasing to $600 for future years, but remember all taxable income, regardless of form, must always be reported.
Unreported income
The IRS receives copies of your W-2s and 1099s, and their systems automatically compare this data to the amounts you report on your tax return. A discrepancy, such as a 1099 that isn't reported on your return, could trigger further review.
The IRS uses several different selection methods: Random selection and computer screening - sometimes returns are selected based solely on a statistical formula. We compare your tax return against "norms" for similar returns.
You (or your tax pro) will meet with the IRS agent at an IRS office. The IRS usually starts these audits within a year after you file the return, and wraps them up within three to six months.
In 2025, tax authorities are using advanced analytics and AI to identify audit risks more accurately than ever. While the chances of an audit remain relatively low, certain patterns and red flags on a tax return can significantly increase your odds.
You know the IRS might be investigating you through official mail (first contact), phone calls (often with automated messages to IRS.gov), or in-person visits, but signs of a criminal probe include contact with IRS Criminal Investigation (CI) agents, subpoenas to you or your bank, questions to your accountant/bank, unusual account activity (freezing/refusing transactions), or agents suddenly going silent after an audit. Key indicators are official IRS letters, contact from CI special agents, third-party inquiries, and formal summonses for records, signaling serious scrutiny beyond a simple audit.
If the IRS or California Franchise Tax Board (FTB) believes your income tax returns were fraudulent, jail time becomes a very real possibility.
The IRS uses a combination of automated and human processes to select which tax returns to audit. Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit.
No, the IRS doesn't catch every instance of unreported income, but their advanced data-matching systems catch most discrepancies involving third-party reporting (like W-2s, 1099s for freelance/interest/dividends) through automated checks, leading to CP2000 notices and potential penalties if missed; however, cash income, crypto, or lifestyle mismatches can also trigger scrutiny, though it's less certain than reported income, and high-income non-filers are a current focus.
What happens during an audit? Internal audit conducts assurance audits through a five-phase process which includes selection, planning, conducting fieldwork, reporting results, and following up on corrective action plans.
What Not to Say During an Audit?
So What Happens if the IRS Audits Your Tax Return and You Are Missing Receipts? The IRS auditor is looking for evidence that your claimed business expenses are legitimate deductions. The auditor may ask your CPA to recreate a detailed history of your expenses using bank records and cancelled check.
The 5 Cs of audit (Criteria, Condition, Cause, Consequence, Corrective Action) are a framework for structuring clear, actionable audit findings, explaining what should be (Criteria), what is found (Condition), why it happened (Cause), what the impact is (Consequence/Effect), and how to fix it (Corrective Action/Recommendation) to drive organizational improvement and compliance.
Here's a list of seven symptoms that call for attention.
Failing to Report All Taxable Income
A mismatch sends up a red flag and causes the IRS computers to spit out a bill. If you receive a 1099 showing income that isn't yours or listing incorrect income, get the issuer to file a correct form with the IRS.
The IRS does not check every tax return. It does not check the majority of them, but the IRS implements methods that track certain factors that would result in a further examination or audit by them.
Filers most commonly receive letters from the IRS notifying them of the examination in the fall or winter months of the previous tax filing year. Yet, the auditors can mail the notifications throughout the year.