You know you're being audited primarily by receiving an official letter from the IRS (Internal Revenue Service) in the mail, as they don't start audits with phone calls or emails, which are often scams. This letter, often a CP75 or similar notice, explains why your return was selected for review (like missing income reports or large deductions) and details what documents you need to provide, either by mail or for an in-person/field audit.
Should your account be selected for audit, we will notify you by mail. We won't initiate an audit by telephone. Assistance is available to help you understand the letter/notice received: Understanding your IRS notice or letter.
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.
2. Making a lot of money. 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 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.
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.
The more risk factors a taxpayer has, the greater the odds of being audited
The four key components of audit risk, as defined by the Audit Risk Model, are Inherent Risk, Control Risk, Detection Risk, and Acceptable Audit Risk (or Overall Audit Risk), representing the susceptibility of accounts to misstatement, failures in internal controls, the auditor's chance of missing errors, and the acceptable level of risk for the audit, respectively, all combining to determine if a materially misstated financial statement receives an inappropriate opinion.
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.
An IRS notice may alert you to a mistake on your tax return or that it's being audited. You can verify the information that was processed by the IRS by viewing a transcript of the return to compare it to the return you may have signed or approved. You can access your tax records through your account.
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 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.
Ten Red Flags that Could Trigger an IRS Audit
A CRA auditor will contact you by mail or phone, or both, to start the audit process and tell you the date, time, and location of the audit. Normally, an on-site audit takes place at your residence, your place of business, or at your representative's office.
Canada's 90% rule helps non-residents and recent immigrants claim full federal tax credits (like the Basic Personal Amount) if 90% or more of their net worldwide income for the relevant tax year is from Canadian sources; otherwise, credits are prorated (reduced) based on their Canadian residency period, ensuring fairness for those who weren't residents all year.
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.
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.
What Not to Say During an Audit?
The "20k rule" refers to the traditional IRS threshold for reporting income from payment apps and online marketplaces on Form 1099-K: over $20,000 in gross payments AND more than 200 transactions in a calendar year. While a law (the American Rescue Plan) temporarily lowered the threshold to $600, recent legislation, the One Big Beautiful Bill Act (OBBBA) (OBBBA), has reinstated the $20,000/200-transaction rule for tax years starting in 2025, providing relief for casual sellers and gig workers.
To avoid the 22% tax bracket (or any higher bracket), focus on reducing your taxable income through strategies like maxing out 401(k)s and HSAs, deferring bonuses, tax-loss harvesting, smart charitable giving, and strategic asset location, understanding that higher rates only apply to income within that bracket, not your entire income.