Overall chances of an IRS audit are low (often under 1%), but increase significantly with higher income, complex returns (like Schedule C for self-employment), large deductions, claiming the Earned Income Tax Credit (EITC), or mismatches with third-party reports (W-2s, 1099s). The IRS uses computerized systems to flag returns that deviate from "norms," focusing resources on high-wealth, small businesses, and EITC fraud.
Who gets audited by the IRS the most? 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.
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.
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.
Most audits start a few months after you file your return
Once you answer the IRS' questions about the accuracy of your return, the IRS will release your refund. Audits that start soon after filing usually focus on tax credits, such as the earned income tax credit and the child tax credit.
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. The IRS mostly audits tax returns of those earning more than $200,000 and corporations with more than $10 million in assets.
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.
Correspondence audits are the most common IRS audit types. The Internal Revenue Service conducts this audit to request additional documentation from taxpayers.
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.
Remember, you will be contacted initially by mail. The IRS will provide all contact information and instructions in the letter you receive. If we conduct your audit by mail, our letter will request additional information about certain items shown on the tax return such as income, expenses, and itemized deductions.
The IRS usually reviews receipts during an audit — if you don't have the receipts, you can sometimes use bank statements or credit card statements to prove your claims instead. Consequences of being audited without receipts can include additional taxes, interest, and financial penalties.
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.
A tax audit doesn't automatically mean you're in trouble. While it's true that the IRS can audit people suspected of doing something wrong, that's not always the case. As part of the audit process, the IRS audits a random portion of the taxpaying public every year.
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.
Ten Red Flags that Could Trigger an IRS Audit
Five Common Audit Findings and How to Address Them: Insights from Page Kirk
Audit tips and tricks key takeaways:
Preparing the Audit Report
The audit report is perhaps the most critical deliverable of the audit process. It provides an independent opinion on the fairness and accuracy of the financial statements.
If the IRS proves willful misconduct, you may face criminal charges, fines, and— in severe cases—prison. Most taxpayers, however, receive civil penalties only. Refunds are paused until the audit finishes.
The IRS does 70% of audits by mail. But just because you get an IRS audit letter instead of an IRS agent at your door, the outcome may not be much different than a face-to-face audit with an IRS agent. In fact, in 2016, the IRS made a change to the return in 89% of all mail audits.
The IRS "10k rule" primarily refers to the requirement for businesses and financial institutions to report cash transactions over $10,000 by filing Form 8300 (for businesses) or a Currency Transaction Report (CTR) (for banks), under the Bank Secrecy Act. This rule helps combat money laundering, tax evasion, and terrorist financing, requiring reporting for single transactions or related transactions totaling over $10,000 in cash within a year, with penalties for non-compliance.
What is a 1099-K form? IRS Form 1099-K is a tax document that reports any payments you received through third-party networks like Venmo, PayPal, or Apple Pay. If you receive more than $20,000 in at least 200 transactions through these platforms, you'll likely get a 1099-K.