Alabama (AL)
April 15, 2026
October 15, 2026
✓ Automatic
AL — AlabamaAlabama Personal Income Tax Extension — What You Need to Do
Alabama automatically extends your personal income tax filing deadline to October 15, 2026 — no form, no application, no federal extension required. Your only obligation before April 15 is to pay any Alabama tax you owe. Miss that payment and penalties start accruing, even with the automatic extension in place.
Alabama Extension Checklist — 2026
Two things to handle. One deadline that matters.
April 15, 2026
Pay Any Alabama Tax You Owe
Alabama’s extension only covers filing — not payment. Pay as much as possible by April 15 to stop penalties and interest from accruing.
Check with Form 40V Alabama Department of Revenue
P.O. Box 327467
Montgomery, AL 36132-7467
October 15, 2026
File Federal + Alabama Return
File your federal return now and add your Alabama state return — Form 40, 40A, or 40NR — in the same session. Filing sooner means a faster refund. Your Alabama extended deadline is October 15.
Start Federal + Alabama Return →
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Alabama Late Payment Penalties — What It Costs to Wait
The extension gives you until October 15 to file. But unpaid tax starts costing you money the day after April 15.
| Penalty Type | Rate | Cap | Trigger |
|---|---|---|---|
| Failure to Pay | 1% per month | 25% | Unpaid balance after April 15 |
| Notice & Demand | +1% per month | — | 30 days after ALDOR sends formal notice |
| Failure to File | 10% of unpaid tax | Min. $50 | Missing the October 15 extended deadline |
| Interest | Varies | No cap | Accrues from April 15 on any unpaid balance |
Alabama State Extension Details
| Extension Type | Automatic — No Form Required |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Extension Period | 6 months |
| Extension Form | None required (automatic); use Form 40V to submit an extension payment |
| Return Form | Form 40 / Form 40A / Form 40NR |
| Federal Extension Required? | No — Alabama’s extension is independent |
| Payment Deadline | April 15, 2026 (extension does not extend payment) |
| Online Payment Portal | myalabamataxes.alabama.gov |
| State Agency | Alabama Department of Revenue (ALDOR) |
| Failure to File Penalty | Greater of $50 or 10% of unpaid tax |
| Failure to Pay Penalty | 1% per month, up to 25% |
Alabama Tax Extension — Frequently Asked Questions
Do I need to do anything to get the Alabama extension?
No. Alabama grants a 6-month extension automatically to every individual income tax filer. No form, no online application, no federal extension required. Your filing deadline is automatically October 15, 2026.
What is Form 40V — do I need it?
Form 40V is Alabama’s payment voucher used when mailing a check or money order. If you pay online at myalabamataxes.alabama.gov, you don’t need it. Only mail-based payments require Form 40V.
Does the Alabama extension cover my federal return?
No. The Alabama extension only covers your state filing. Your federal return requires a separate extension (Form 4868) if you need more time to file with the IRS.
What if I can’t pay my full Alabama tax by April 15?
Pay as much as you can. Penalties and interest are calculated on the unpaid balance, so every dollar paid by April 15 reduces your total exposure.
Which Alabama return form do I need?
Form 40 is the standard return. Form 40A is the short form for simpler returns. Form 40NR is for nonresidents and part-year residents. All three are due by October 15, 2026.
Is my Alabama refund delayed if I use the extension?
Yes — ALDOR can’t process your refund until you file your completed return. If you expect a refund, file as soon as you’re ready rather than waiting until October 15.
Ready to File? Start Federal + Alabama
File your federal return and add Alabama state in the same session. October 15 extended deadline — secure, fast, with live support.