The deadline for most U.S. taxpayers to file their federal income tax returns for the 2025 tax year is Tuesday, April 15, 2026. This date applies to residents in all states except those in Maine and Massachusetts, who have until April 17 due to local holidays. The IRS strongly encourages electronic filing for faster processing and confirmation.
Failing to file a return by the deadline can result in significant penalties. The IRS imposes a failure-to-file penalty, which is typically 5% of the unpaid taxes for each month or part of a month that a return is late, up to a maximum of 25%. If a return is filed more than 60 days after the due date, the minimum penalty is either $485 or 100% of the unpaid tax, whichever is less, for returns due in 2026. Interest, currently at an annual rate of 8%, also accrues on any unpaid tax from the due date.
Taxpayers who cannot meet the deadline can request an automatic extension to file until October 15, 2026, using Form 4868. It is crucial to understand that this extension is for filing the paperwork, not for paying any taxes owed. To avoid penalties and interest, taxpayers must still pay their estimated tax liability by the original April deadline.
For those expecting a refund, there is no penalty for filing late. However, the IRS notes that taxpayers have only three years from the original filing deadline to claim a refund, after which the money is forfeited to the U.S. Treasury.
