Taxes are generally due by April 15, but if a tax extension is filed, the deadline to file the tax return is extended to October 15 of the same year. However, the extension only applies to the filing of the return, not to the payment of any tax owed, which is still due by April 15 to avoid penalties and interest. The extension can be requested using IRS Form 4868 filed by the original April deadline. For 2025 tax filings (for the 2024 tax year), the extended filing deadline with an extension is October 15, 2025. If the taxpayer is an expat, an automatic two-month extension to June 16, 2025, applies, and an additional extension to October 15, 2025, can be requested. Late filings after October 15 without an extension may incur penalties.
