Alabama Form 40 – Resident Individual Income Tax Return (2026)

Last reviewed: 2025-11-12

Use the Alabama Tax Form Calculator Form alabama: Alabama Form 40 – Resident Individual Income Tax Return (2026) as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 Alabama state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.

Form 40 is the primary Alabama individual income tax return filed by full-year residents (and, in many cases, part-year residents). It’s where you report all taxable and non-taxable income earned or received during the year, apply Alabama-specific adjustments, choose standard or itemized deductions, claim personal exemptions and dependents, calculate your state tax (at a flat rate of 5% of taxable income), use eligible credits, and determine whether you owe tax or are due a refund. The form also links to supporting schedules like Schedule A (Itemized Deductions), Schedule B (Interest/Dividends), Schedule DC (Donation Check-Offs), and Form 40-ES for estimated tax payments. You’ll attach all required W-2s, 1099s, K-1s and other documentation.

How to Use Alabama Form 40

Follow this workflow to complete your return:

Step 1 – Gather income sources: Enter wages (Line 1), interest (Line 2), dividends (Line 3), business income (Line 4), capital gains (Line 5), rental/royalty income (Line 6), and other income (Line 7).
Step 2 – Adjustments: On Lines 9–10 include federal income tax deduction and other Alabama-specific adjustments (e.g., ABLE accounts, first-time home buyer deposits).
Step 3 – Deductions & Exemptions: Choose the larger of the standard deduction (or spouse filing separate amount) or itemized deduction (Schedule A, Line 13). Then apply personal exemptions (Line 15), dependents (Line 16) and any additional age/blind exemption (Line 17).
Step 4 – Compute tax: Subtract total deductions from your Alabama AGI to get taxable income (Line 19). Apply the flat rate of 5 % to compute your tax on Line 20.
Step 5 – Apply credits and payments: Enter credits on Lines 21–23 (taxes paid to other states, donation check-off, low-income allowance). Subtract credits from tax (Line 24) to get net tax (Line 25). Then add up withholdings and estimated payments (Lines 26–28 = Line 29) and calculate refund (Line 30) or balance due (Line 31).

TIP: Use the Alabama State Tax Calculator to preview your estimated tax liability before completing the form.

Alabama Form 40 — Individual Income Tax Return (2026)
INCOME SECTION
1	Wages, salaries, tips, etc. (attach W-2)
2	Taxable interest (attach Schedule B)
3	Ordinary dividends (Schedule B)
4	Business income (or loss) (Schedule C)
5	Capital gain (or loss) (Schedule D)
6	Rents, royalties, partnerships, etc. (Schedule E)
7	Other income (describe)
8	Total Income (Add Lines 1–7)
ADJUSTMENTS TO INCOME
9	Federal income tax deduction (see instructions)
10	Other adjustments (attach Schedule O)
11	Adjusted Gross Income (AGI) (Line 8 − Lines 9–10)
DEDUCTIONS
12	Standard deduction (max $2,500 single / $7,500 joint)
13	Itemized deductions (Schedule A)
14	Greater of Line 12 or 13
15	Personal exemptions ($2.00 × no. of exemptions)
16	Dependent exemptions ($1.00 × no. of dependents)
17	Additional age/blind exemption ($1,500 each if qualified)
18	Total deductions and exemptions (Add Lines 14–17)
TAX COMPUTATION
19	Taxable income (Line 11 − Line 18)
20	Tax (Line 19 × 5%)
CREDITS
21	Credit for taxes paid to other states (Schedule CR)
22	Dependent care expenses (Schedule DC)
23	Low-income allowance ($300 max)
24	Total credits (Add Lines 21–23)
25	Net tax due (Line 20 − Line 24)
PAYMENTS
26	Alabama income tax withheld (attach W-2s)
27	Estimated payments (Form 40-ES)
28	Payment with extension (Form 40-V)
29	Total payments (Add Lines 26–28)
30	Overpayment if Line 29 > Line 25 (Line 29 − Line 25)
31	Tax due if Line 25 > Line 29 (Line 25 − Line 29)

Common Scenarios

Example – Standard Deduction: If you are single, take the standard deduction of up to $2,500 and your personal exemption of $2.00.

Example – Itemizing: If your itemized deductions (Schedule A) total more than the standard deduction, enter the higher amount on Line 14 and carry it forward.

Example – Credits & Refund: If you paid estimated tax via Form 40-ES and had withholdings, your total payments on Line 29 may exceed your net tax (Line 25) — the difference is your refund on Line 30.

Last reviewed: 2025-11-12: If you believe this form requires an update, please contact us.

Additional Resources

Be sure to attach all required schedules and documentation to your return. Use original signatures in black ink if filing by mail. Electronic filing via My Alabama Taxes produces a 2-D barcode to speed processing.

Quick Access Tools

Frequently Asked Questions

What happens if Form AL-40X shows that I owe additional Alabama tax?

If your amended return results in a higher tax liability, you should pay the additional amount when you file AL-40X. Interest on underpaid tax generally accrues from the original due date of the return, not the date you amend, so delaying payment only increases the final cost. If you are mailing a check, Alabama recommends using a payment voucher such as Form AL-40V or AL-40NRV, depending on whether you are a resident or nonresident, so that your payment is correctly tied to the amended year and account. Failure to settle the extra liability can lead to billing notices, further interest, and potential collection actions. Even so, voluntarily amending and paying usually results in a better outcome than waiting for Alabama or the IRS to discover discrepancies.

What records should parents keep to support a Schedule AATC claim?

Parents should retain invoices, tuition bills, proof of payment (bank statements, receipts), enrollment confirmations, and school documentation proving entry into the non-failing or nonpublic school. The Alabama Accountability Act requires strict substantiation to prevent misuse, so taxpayers should also keep the school’s classification documents or confirmation that the original school appeared on the “failing school” list for the appropriate year. If audited, the Alabama Department of Revenue may request these records to validate the refundable credit. While documents are not mailed with the return, they should be kept for at least three years.

How can I estimate my Alabama tax before using Form 40A?

You can preview your expected liability with the Alabama State Tax Calculator. It uses current rates, thresholds, and personal exemptions to show how much tax you’ll owe or be refunded. This is especially useful if you are switching from the full Form 40 or adjusting withholding.

Who must file Alabama Form AL-40NR and how does it differ from the resident Form AL-40?

Form AL-40NR is required for individuals who were not Alabama residents for the tax year, or who lived in the state only part-time, but earned income from Alabama sources. Unlike the resident Form AL-40, which reports all income from all sources, Form AL-40NR focuses on allocating income between Alabama and other jurisdictions. You must complete the return if you earned wages for work performed in Alabama, had rental property within the state, received income through a pass-through entity operating in Alabama, or sold property located in Alabama. Part-year residents must report income earned while domiciled in the state and any income sourced to Alabama thereafter. The AL-40NR also requires an allocation schedule to separate Alabama-sourced income from non-Alabama income, ensuring the correct proportion of tax is calculated. This prevents nonresidents from overpaying on non-Alabama income while still ensuring Alabama collects the correct amount on in-state activity.

Why don’t my brackets match payroll tables?

Employers may use different rounding/timing tables; small variances are normal.

Important Notes

All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.