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IRS Resolution Sep 17, 2026 4 min read
Filed an Extension? Don't Let October 15 Sneak Up on You
An extension buys time to file — not time to pay. Here's how to finish strong before the fall deadline.
Millions of taxpayers file extensions every April, and that's perfectly fine. The trouble starts when October 15 arrives and the paperwork still isn't ready.
What an extension does — and doesn't — do
An extension gives you more time to file your return. It does not extend the time to pay. Interest and late-payment penalties can build on any balance that wasn't paid by April.
Your four-week finish plan
- Gather any missing documents now: K-1s, brokerage statements and corrected 1099s.
- Confirm estimated payments made so far this year.
- Get your file to your preparer by early October.
- If you can't pay in full, file anyway — the failure-to-file penalty is typically much steeper than the failure-to-pay penalty.
