Filed an Extension? Your October 15 Deadline Does Not Extend the Time to Pay

Which deadline is approaching?

Some Orange County households requested more time to finish their 2025 tax returns. Their extended filing deadline is October 15, 2026. This date applies to individual federal and California returns; businesses may have different deadlines.

The IRS says taxpayers who timely requested an extension have until October 15 to file without a late-filing penalty. California’s Franchise Tax Board, or FTB, also grants an automatic six-month filing extension for individual returns, with an October 15, 2026 deadline. No separate extension request is required for the FTB.

Both agencies make the same distinction: an extension gives more time to FILE paperwork. It does not give more time to PAY.

Filing a return and paying tax are separate

If you still owe tax for 2025, the IRS says you should have paid the estimated amount by the April deadline. The FTB also says California tax was due by April 15, 2026, to avoid interest and penalties.

For example, a household may have paid its estimated tax in April but needed more time to get a W-2 or business records. An extension may give that household until October to finish filing. Another household may have filed an extension but not paid all the tax it expected to owe. The October 15 date does not erase that balance.

The exact interest or penalty depends on the unpaid amount, payment date, and the taxpayer’s circumstances. This article cannot calculate what a particular family owes.

Three steps before October 15

Step 1 — Confirm that an extension was requested. Look for an electronic confirmation, Form 4868, or ask the preparer who filed it. The IRS allows people to request an extension through IRS Free File, but the request deadline was the original April filing deadline, not October.

Step 2 — Gather missing documents. Check for W-2s, 1099s, business expenses, and dependent information. If a document is missing, ask the issuing organization or tax preparer how to get a replacement.

Step 3 — File by October 15. Use an official electronic filing option or the tax professional you hired. Keep the filing confirmation. If you know you still owe tax, ask a licensed professional about payment options.

The IRS and FTB are separate agencies. Filing a federal return does not mean a California return was filed, and the reverse is also true. Check the status of both.

Where to check official information

IRS — federal filing extensions: IRS.gov — Get an extension

California FTB — state filing extensions: FTB.ca.gov — Extension to file

If you hire a tax preparer, ask about their license or credential, fee, and who will sign the return. Do not send a Social Security number or tax document through an unexpected phone number or link.

As of the draft date, October 15 is just over two weeks away. If you requested an extension, the remaining task is to file on time and keep the confirmation. If you are unsure about your filing status, check with the tax agency or a licensed professional now.