Last Day For Filing 2025 Taxes. Tax season starts the day the irs begins accepting returns, usually in late january, and ends on tax day, which will be april 15, 2025. This is the last day to file and pay without penalty unless you request a tax extension.

The federal tax filing deadline (tax day) is april 15, 2025, with an extension deadline of october 15, 2025. “tax day” is april 15, 2025, but there are many other tax deadlines throughout the year depending on your business entity type.