Q: Are there benefits to filing my tax return on time besides avoiding penalties or getting a refund sooner?
A: Yes, and it’s a benefit most taxpayers rarely hear about: Filing on time starts the IRS audit clock.
The IRS has only a limited amount of time to review and challenge a tax return. Filing a return promptly helps ensure this clock begins running as early as possible.
Here are the key rules:
The standard audit window is three years. The clock starts from the later of the filing date or the filing deadline – meaning there isn’t a meaningful difference between filing anytime before April 15. The three-year period usually begins on the filing deadline: If you filed your 2025 tax return in February, the audit window would generally run until April 15, 2029.
That said, it is helpful to meet the deadline. Filing later – such as on extension or after the extended deadline – pushes the start of the statute clock later too.
Large income omissions extend the window. If a return omits 25 percent or more of gross income, the statute of limitations extends to six years.
Fraud removes the time limit entirely. If the IRS finds evidence of willful evasion, fraud or intentional tax schemes, there is no statute of limitations, meaning the return could be audited at any time.
The bottom line: Filing on time doesn’t just avoid penalties – it also starts the IRS audit clock. The sooner that clock begins, the sooner that tax year can be closed permanently.
Send questions about your taxes to Vincent Hicks, a CPA based in Cambridge who has more than 20 years of experience, at [email protected]. You can call Hicks at (859) 553-0788.