How to pay Alabama estimated taxes.

Alabama collects its own estimated tax through the Alabama Department of Revenue, separate from the IRS. Here’s who needs to pay, when, and how to pay online.

Do you need to pay?

You generally must pay estimated tax if you expect to owe at least $500 in Alabama tax for 2026 after subtracting withholding and credits, and your withholding plus credits will be less than the safe harbor amount.

You avoid the underpayment penalty if withholding and timely estimates cover the smaller of 90% of your 2026 tax or 100% of your 2025 tax. If your 2025 Alabama AGI was more than $150,000 ($75,000 if married filing separately for 2026), use 110% of your 2025 tax instead of 100%.

If you underpay: Alabama charges interest at the federal underpayment rate. Its 2026 quarterly rates are 7% (Q1), 6% (Q2), 7% (Q3), and 7% (Q4). The underpayment penalty is figured on Form 2210AL.

For how to pick a safe amount, see how much to pay in estimated taxes.

Deadlines

Four equal installments due April 15, 2026, June 15, 2026, September 15, 2026, and January 15, 2027. This matches the federal schedule. If a date falls on a weekend or state holiday, it moves to the next business day.

Payment	Due
1st	April 15
2nd	June 15
3rd	September 15
4th	January 15 of the next year

A date on a weekend or holiday moves to the next business day. Pay at least two business days early.

Paying Alabama, step by step

What you need

Nothing to set up. My Alabama Taxes (MAT) takes payments without an account.
Your Social Security number and a copy of last year's Alabama return.
Your bank routing and account numbers.

Start at My Alabama Taxes (MAT), Alabama's official payment site.

Go to My Alabama Taxes. You do not need a username to pay.
In the Payments panel, click Make a Payment.
Have your SSN, the payment type, the filing period, and your bank information ready.
Enter your account information and choose Estimate Payment as the payment type for tax year 2026.
Enter your bank account and amount, then submit and save the confirmation.

Other ways to pay: My Alabama Taxes takes e-check (ACH debit) payments from your bank account at no charge. You can also pay by credit or debit card directly in My Alabama Taxes for a convenience fee, or by phone at (334) 353-8096. To pay by check, mail it with the Form 40ES voucher to Alabama Department of Revenue, Individual Estimates, P.O. Box 327485, Montgomery, AL 36132-7485. Note that My Alabama Taxes says you may only pay by check if the amount is less than $750.

Alabama will not fill these payments in for you. Your preparer has to enter each estimated payment on your Alabama return. Keep your own record of the date, amount, and confirmation number.

Extension payments

Alabama grants an automatic six-month extension to October 15 with no form to file. It does not extend the time to pay: interest and the late payment penalty run from the original due date. Pay what you expect to owe by the original due date in My Alabama Taxes, or mail it with Form 40V with the Automatic Extension Payment box checked.

Make this year's first estimated payment as a separate transaction, marked as an estimate for the current year.

Good to know

My Alabama Taxes says you can pay by check only when the amount is less than $750, so plan to pay larger estimates online.
Alabama lets pass-through entities elect to pay tax at the entity level (Electing Pass-Through Entity). If your business makes that election, factor it into your own estimates.
Farmers who earn at least two-thirds of gross income from farming can skip estimates by filing and paying in full by March 1, 2027.
Paying other states? See the payment links for every state's official site, and the federal walkthrough.

Official sources

Checked October 2026 against the Alabama Department of Revenue's own publications.

This guide is for general education and reflects rules as of October 2026. Tax law and agency websites change, and your situation may have details that change the answer. Please talk with your tax professional before acting on it.