October 15 Tax Deadline: What Late Filers Face

The October 15 deadline is the last day to file a federal income tax return for anyone who requested an automatic extension. Missing it brings a failure-to-file penalty of 5% of unpaid tax per month, capped at 25%. The extension covers filing only, not payment. Taxes owed were due April 15.

The IRS encourages e-filing for faster processing and immediate confirmation. Electronic payments can be made through IRS.gov via bank account or card. Taxpayers affected by disasters may qualify for additional relief, including extended deadlines through September 30, 2026 for those impacted by the Israel terrorist actions, the IRS said.

For those who miss the October 15 cutoff, filing as soon as possible reduces penalty accumulation. The failure-to-pay penalty runs at 0.5% per month on unpaid balances. Setting up an IRS payment plan can cap further charges.

The Franchise Tax Board expects over 20 million California filers to submit by the state's deadline. Individuals who fail to file within three years lose any refund due.

The final extension date is firm. No further automatic extensions are available after October 15.