Alabama has a state income tax, and you must file a return if your income exceeds the threshold for your filing status

Alabama taxes wages, salaries, interest, dividends, and other income sources. The state uses a progressive tax rate system, meaning the percentage you pay increases as your income rises. If you work in Alabama or live there, you will owe state income tax on most types of income — with some exceptions for retirement income and Social Security.

The filing requirement depends on your age, filing status, and total income. A single person under 65 must file if their gross income is $13,500 or more in the current tax year. The threshold is higher for married filers and for people 65 and older. Even if you do not meet the filing requirement, you may want to file anyway if you had taxes withheld from your paycheck, because you could receive a refund.

Key Takeaways

  • Alabama taxes most income at rates ranging from 2% to 5%, depending on your income bracket.
  • You must file a state return if your gross income exceeds the threshold for your filing status, which varies by age and marital status.
  • Social Security benefits and certain retirement income are exempt from Alabama state tax.
  • You file your Alabama return using Form 40 (the standard individual return) or Form 40-NR if you are a nonresident.
  • The Alabama Department of Revenue processes state returns and handles disputes or audits.

Alabama income tax rates and brackets

Alabama uses five tax brackets. The lowest rate is 2% on income up to $500, and the highest is 5% on income over $3,000. These brackets explore to single filers, married filers filing jointly, and other statuses — though the income ranges differ slightly by filing status.

The brackets have not changed in recent years, but your actual tax bill depends on where your total income falls. For example, a single person earning $25,000 does not pay 5% on all of it — they pay 2% on the first $500, then higher percentages on each bracket up to their income level. This is called a marginal tax system.

Alabama also allows a standard deduction, which reduces your taxable income before the tax is calculated. The standard deduction amount depends on your age and filing status. You can also itemize deductions instead if they total more than the standard deduction, though most people use the standard deduction because it is simpler.

Who must file a state return in Alabama

You must file if your gross income meets or exceeds the threshold for your filing status. For a single person under 65, that threshold is $13,500. For married filing jointly, both spouses under 65, it is $27,000. If you are 65 or older, the threshold is higher — $15,500 for single filers and $30,500 for married filing jointly.

Gross income includes wages, self-employment income, interest, dividends, capital gains, and most other sources. It does not include Social Security benefits (which are exempt) or certain retirement distributions, depending on the source and your age.

Even if you fall below the filing threshold, you should file if you had state income tax withheld from your paychecks. Filing allows you to claim a refund of any overpayment. If you are self-employed, you must file regardless of income level if you owe self-employment tax to the federal government.

Income types that are exempt from Alabama tax

Social Security benefits are fully exempt from Alabama state income tax. This is one of the most significant exemptions and applies to all recipients, regardless of income level.

Certain retirement income is also exempt. Military retirement pay is exempt for active duty service members and their survivors. Public employee retirement benefits — including pensions from state and local government jobs — are exempt if you are retired and over 59½. Private pension income and distributions from IRAs and 401(k) plans are generally taxable unless they fall under a specific exemption.

Interest from U.S. Treasury bonds and certain other federal securities is exempt from state tax (though it is still subject to federal tax). Some types of investment income and capital gains may also may have access to for partial exemptions depending on the source and how long you held the asset.

How to file your Alabama state return

You file using Form 40 (Individual Income Tax Return) if you are a resident of Alabama. If you are a nonresident who earned income in Alabama, you file Form 40-NR instead. Both forms are available on the Alabama Department of Revenue website.

You can file by mail or electronically. Electronic filing (e-file) is faster and reduces errors because the software checks your math and flags missing information before you submit. Many tax software platforms — including TurboTax, H&R Block, and TaxAct — support Alabama returns and can file electronically on your behalf.

The filing important date is April 15 each year, the same as the federal important date. If you cannot file by then, you can request an extension, which gives you until October 15 to file. An extension delays filing but does not delay payment — if you owe tax, you should pay by April 15 to avoid penalties and interest, even if you file late.

You will need your Social Security number, W-2 forms from employers, 1099 forms for other income, and documentation of any deductions or credits you claim. Keep these documents for at least three years in case the Alabama Department of Revenue audits your return.

What happens if you do not file or pay on time

If you owe tax and do not file by the important date, the Alabama Department of Revenue charges a failure-to-file penalty. The penalty is typically 5% of the unpaid tax for each month (or part of a month) that the return is late, up to 25% total. A separate failure-to-pay penalty also applies if you owe tax but do not pay it by April 15.

Interest accrues on any unpaid tax from the due date until you pay. The interest rate is set quarterly and is currently higher than it has been in recent years. Both penalties and interest compound, meaning the longer you wait, the more you owe.

If you believe you cannot pay in full, contact the Alabama Department of Revenue to discuss a payment plan. The department can set up an installment agreement that lets you pay over time, though interest and penalties continue to accrue until the balance is zero.

Nonresident income and part-year residents

If you worked in Alabama but lived in another state, you file Form 40-NR and report only the income you earned in Alabama. You do not report income from other states on your Alabama return — that income is reported to the state where you earned it or where you lived.

If you moved to or from Alabama during the year, you are a part-year resident. You file Form 40 and report all income for the entire year, but you may be able to claim a credit for taxes paid to another state on income earned there. This prevents double taxation on the same income.

The Alabama Department of Revenue uses your residency status on the date you file to determine which form to use. If you are unsure whether you are a resident or nonresident, contact the department's taxpayer services line — the answer depends on factors like where you maintained a home, where your family lived, and how long you were in the state.

Frequently Asked Questions

Does Alabama tax retirement income and pensions?

Social Security is fully exempt. Military retirement pay is exempt. Public employee pensions are exempt if you are retired and over 59½. Private pensions, IRAs, and 401(k) distributions are generally taxable unless they may have access to for a specific exemption. Contact the Alabama Department of Revenue if you are unsure whether your specific pension or distribution is taxable.

What if I worked in Alabama but live in another state?

You file Form 40-NR and report only income earned in Alabama. You also file a return in the state where you live, reporting all income. Most states allow a credit for taxes paid to another state, so you do not pay tax twice on the same income. Check with the other state's tax authority to confirm.

Can I file my Alabama return electronically?

Yes. You can e-file through tax software platforms like TurboTax, H&R Block, or TaxAct, or you can file by mail using Form 40 or Form 40-NR. E-filing is faster and reduces errors. The filing important date is April 15 each year.

What if I owe more than I can pay right now?

Contact the Alabama Department of Revenue to set up a payment plan. You can pay in installments, though interest and penalties continue to accrue until the balance is paid in full. Filing on time and paying what you can by April 15 reduces the penalties that explore.

How long should I keep my tax documents?

Keep all documents — W-2s, 1099s, receipts, and deduction records — for at least three years. The Alabama Department of Revenue can audit returns from prior years, and you will need these documents to support your return if that happens.