To file Alabama Form 40, finish your federal Form 1040 first, then transfer your income, deductions, and credits onto the Alabama return, calculate your tax using the state’s three brackets, and submit the return by April 15 either electronically through My Alabama Taxes or by mail to the Alabama Department of Revenue.1Alabama Department of Revenue. Individual Income Tax Electronic Filing Options Form 40 is the full-year resident return. If you lived in Alabama all year, this is your form.
Who Has to File
You file Form 40 if you were an Alabama resident for the entire tax year and your gross income met the minimum for your filing status. For 2024 those floors are $4,500 single, $11,500 married filing jointly, $5,750 married filing separately, and $8,200 head of family.2Alabama Department of Revenue. Form 40A Booklet – 2024 Instructions
File anyway if you earned less but had Alabama tax withheld from your paycheck. That is the only way to get the money back. The same goes for anyone who qualifies for a refundable credit.
Alabama treats you as a resident if you are domiciled in the state, keep a permanent home here, or spend more than seven months of the year inside the state. Residents owe tax on all income no matter where it was earned.3Alabama Administrative Code. Alabama Administrative Code 810-3-2-.01 – Individuals Subject to Alabama Income Tax If you lived in Alabama only part of the year, or earned Alabama income as a nonresident, Form 40 is not your form.
What to Gather Before You Start
Pull everything together first. Stopping mid-return to hunt for a document is how numbers get wrong.
- Social Security numbers for you, your spouse if filing jointly, and every dependent. A wrong or missing SSN is one of the fastest ways to get a return rejected.
- W-2s from every employer, showing wages and Alabama tax withheld.
- 1099s for interest, dividends, retirement distributions, freelance work, and any other non-wage income.
- Your completed federal Form 1040. Alabama pulls several figures from the federal return, so finish that side first.
- Receipts and records for deductible expenses if you plan to itemize: medical bills, mortgage interest, charitable contributions, and state and local taxes paid.
Filling Out the Form
Personal Information and Filing Status
Enter your name, address, and SSN at the top. Choose the filing status that matched your household on December 31. Alabama recognizes four: single, married filing jointly, married filing separately, and head of family. Status drives both your bracket and your standard deduction, so get it right.
Income
Transfer income figures from your W-2s, 1099s, and federal return. Alabama taxes wages, salaries, tips, interest, dividends, business income, capital gains, rental income, and retirement distributions. Added together, these produce your Alabama adjusted gross income. Because the state leans on many federal definitions, most of the arithmetic has already happened on your 1040.
Deductions
Subtract either the standard deduction or itemized deductions, whichever gives you the larger break. Alabama’s standard deduction is unusual in that it shrinks as income rises. The highest amounts go to lower-income filers and step down to a floor.4Alabama Department of Revenue. Form 40 Standard Deduction Chart
- Married filing jointly: $8,500 (income under $26,000) down to $5,000 (income of $35,500 and above).
- Head of family: $5,200 down to $2,500.
- Married filing separately: $4,250 down to $2,500.
- Single: $3,000 down to $2,500.
If you itemize, list eligible expenses on Schedule A. Alabama allows itemized deductions for medical expenses, mortgage interest, charitable gifts, certain taxes, and casualty losses. One state-specific write-off: contributions to the CollegeCounts 529 plan are deductible up to $5,000 per taxpayer, or $10,000 on a joint return.5Alabama Department of Revenue. 529 Savings Plan FAQs
Personal and Dependent Exemptions
Subtract the personal exemption next. Single filers and those filing separately get $1,500. Married couples filing jointly and head-of-family filers get $3,000.6Alabama Department of Revenue. What Personal Exemptions Am I Entitled To?
You can also claim a $1,000 dependent exemption for each qualifying child or dependent, plus an extra $1,000 for dependents under 19, or under 24 if a full-time student. Check the current year’s instruction booklet for any updates.
Tax, Credits, and Payments
Apply Alabama’s three brackets to your taxable income:7Alabama Department of Revenue. Individual Income Tax
- 2% on the first $500 of taxable income ($1,000 for joint filers).
- 4% on the next $2,500 ($5,000 for joint filers).
- 5% on everything above $3,000 ($6,000 for joint filers).
Reduce that tax by any credits you qualify for. The most common one is the credit for income taxes paid to another state, which keeps the same earnings from being taxed twice. If you worked in Georgia or Tennessee and paid income tax there, you can claim a credit on your Alabama return for the amount paid, capped at the Alabama tax rate on that income.8Alabama Legislature. Alabama Code 40-18-21 – Credits for Taxes Paid on Income from Sources Outside the State
Last, subtract your Alabama withholding from your W-2s and any estimated payments you made during the year. A positive result means you owe. A negative result is your refund.
Submitting the Return
Electronic Filing
E-filing processes faster and gets refunds out sooner. ALDOR offers two free paths:1Alabama Department of Revenue. Individual Income Tax Electronic Filing Options
- My Alabama Taxes (MAT). ALDOR’s own portal accepts Form 40, Form 40EZ, and Form 40NR at no cost. Create an account, open your income tax account, and choose “File or View returns and periods.”
- Approved commercial software. Authorized providers include TurboTax, H&R Block, TaxAct, TaxSlayer, Cash App Taxes, and FreeTaxUSA, among others. Several offer free filing based on income or return complexity.
Paper Filing
Mailing addresses depend on whether you owe:9Alabama Department of Revenue. What Is the Address for Mailing My Return?
- Refund or zero balance: Alabama Department of Revenue, P.O. Box 154, Montgomery, AL 36135-0001.
- Payment enclosed: Alabama Department of Revenue, P.O. Box 2401, Montgomery, AL 36140-0001.
Include Form 40V, the payment voucher, with any check or money order so ALDOR credits the payment to the right account. Skip Form 40V if you already paid electronically.10Alabama Department of Revenue. Form 40V – Individual Income Tax Payment Voucher
Paying a Balance Due
If you owe, the My Alabama Taxes portal takes ACH debit directly from your bank account as well as credit and debit card payments.11Alabama Department of Revenue. Make A Payment Pay by April 15 to avoid penalties and interest. If you cannot cover the whole bill, file on time anyway and pay what you can. The late-filing penalty is far steeper than the late-payment penalty.
Tracking Your Refund
E-filed returns with direct deposit refund fastest. ALDOR asks you to wait at least six weeks after filing before checking status. If nothing has arrived in eight to ten weeks, the return may be under review.12Alabama Department of Revenue. Where’s My Refund Because I Have Not Received It Yet?
Three ways to check:
- Online at myalabamataxes.alabama.gov.
- 24-hour refund hotline: 1-855-894-7391.
- Daytime refund status line: 334-309-2612.
If You Miss the Deadline
Alabama runs two separate penalties and they can stack on the same return:
- Late filing: the greater of 10% of the additional tax due or $50. This hits as soon as you miss the deadline, including any extension, so even a small balance triggers at least a $50 penalty.13Alabama Legislature. Alabama Code Title 40 Revenue and Taxation 40-2A-11 – Civil Penalties Levied in Addition to Other Penalties Provided by Law
- Late payment: 1% of the unpaid tax per month or partial month, capped at 25%. Filing on time but paying five months late adds 5% plus interest.14Alabama Administrative Code. Alabama Administrative Code 810-14-1-.30 – Penalty for Failure to Timely Pay Tax
Interest runs on top of the penalties. The practical rule: file by April 15 even if you cannot pay in full. The 10% late-filing penalty dwarfs the 1%-per-month payment penalty.
If You Have Income Without Withholding
Self-employment earnings, rental income, and investment gains usually come without tax withheld. In that case you may need quarterly estimated payments on Form 40ES. The rule of thumb: pay estimates if you expect your tax liability after withholding and credits to be $500 or more for the year.15Alabama Department of Revenue. Form 2210AL Instructions
Due dates are April 15, June 15, September 15, and January 15 of the following year. To avoid an underpayment penalty, pay at least the smaller of 90% of this year’s tax or 100% of last year’s tax through a mix of withholding and estimates. If your prior-year adjusted gross income was over $150,000 ($75,000 married filing separately), the safe harbor rises to 110% of last year’s tax.