Alabama Income Tax Calculator
Enter your gross income, filing status, and deductions to calculate your 2025 Alabama state income tax. This calculator applies the correct three-bracket progressive rates, the income-based Alabama standard deduction, personal and dependent exemptions, and Alabama's unique federal income tax deduction. You get your taxable income, total state tax owed, effective rate, marginal rate, and an estimated take-home pay figure.
How Alabama income tax is calculated
Alabama uses a progressive income tax with three brackets and rates of 2%, 4%, and 5%. The top 5% rate kicks in at just $3,000 of taxable income for single filers ($6,000 for married couples filing jointly), which means most workers reach the top bracket quickly. However, Alabama's effective rate is kept lower than that headline rate by a generous set of deductions and exemptions. Before applying the brackets, Alabama allows you to subtract your federal income tax paid, an income-based standard deduction, a personal exemption ($1,500 single or married filing separately, $3,000 married filing jointly or head of family), and an income-based dependent exemption of $1,000, $500, or $300 per dependent.
The Alabama federal income tax deduction - a major benefit
One of Alabama's most valuable and unusual tax features is that it allows individual taxpayers to deduct their federal income taxes from adjusted gross income before computing state tax. Only a small handful of states in the US offer this deduction. For a taxpayer in the 22% federal bracket, deducting $10,000 of federal tax from Alabama income saves roughly $500 in state tax. The deduction applies dollar-for-dollar and is not capped, making it especially valuable for higher earners who pay significant federal taxes. If you know your exact federal tax liability, enter it in the calculator; otherwise the tool estimates it from your gross income and filing status.
Alabama standard deduction and exemptions
Alabama's standard deduction is income-based, so it phases down as Alabama adjusted gross income rises. A single filer with Alabama AGI of $25,999 or less gets the full $3,000; from $26,000 the deduction drops $25 for each additional $500 of AGI, reaching the $2,500 floor at $35,500. Married couples filing jointly start at $8,500 and lose $175 per $500 step, bottoming out at $5,000. Head of Family starts at $5,200 and loses $135 per step, and married filing separately starts at $4,250 and loses $88 for each $250 step from $13,000, with both floored at $2,500. On top of the standard deduction, every return claims a personal exemption of $1,500 (single or married filing separately) or $3,000 (married filing jointly or head of family), plus a dependent exemption of $1,000 per dependent if Alabama AGI is $50,000 or less, $500 from $50,001 to $100,000, or $300 above $100,000. The standard deduction and dependent exemption charts both key off Alabama AGI before the federal income tax deduction is applied.
What income is exempt from Alabama tax
Alabama exempts several common income types entirely. Social Security benefits are not subject to Alabama income tax, regardless of the amount or the taxpayer's total income. Federal, state, and local government pensions are fully exempt, as are military retirement pay, combat zone compensation, and railroad retirement benefits. This makes Alabama particularly attractive for retirees who rely on these income sources. If you receive any of these types of income, enter them in the calculator to exclude them from your taxable base.
Alabama income tax brackets 2025
| Filing status | Income range | Rate |
|---|---|---|
| Single / HOH / MFS | $0 to $500 | 2% |
| Single / HOH / MFS | $500 to $3,000 | 4% |
| Single / HOH / MFS | Over $3,000 | 5% |
| Married Filing Jointly | $0 to $1,000 | 2% |
| Married Filing Jointly | $1,000 to $6,000 | 4% |
| Married Filing Jointly | Over $6,000 | 5% |
Single, Head of Household, and Married Filing Separately use the first bracket set. Married Filing Jointly uses the second.
Frequently asked questions
What is the Alabama income tax rate for 2025?
Alabama taxes income at three progressive rates: 2% on the first $500 of taxable income (single filers), 4% on the next $2,500, and 5% on all income over $3,000. For married couples filing jointly, the 2% rate applies up to $1,000, 4% from $1,000 to $6,000, and 5% above $6,000. Because most Alabama workers quickly reach the 5% bracket, the top marginal rate is 5%. The effective rate (tax as a share of total income) is usually well below 5% due to deductions and exemptions.
Can I deduct my federal income tax on my Alabama return?
Yes. Alabama is one of very few states that allows taxpayers to deduct the federal income tax they paid from their Alabama adjusted gross income before calculating state tax. This deduction can be substantial for higher-income filers and meaningfully reduces the Alabama effective rate. There is no cap on this deduction. You can enter your known federal tax on the calculator, or let it estimate federal tax from your income.
Is Social Security taxed in Alabama?
No. Social Security benefits are fully exempt from Alabama income tax for all filers, regardless of total income level. This is different from federal rules, where up to 85% of Social Security can be taxable. Other common retirement income sources that Alabama exempts include federal, state, and local government pensions, military retirement pay, and railroad retirement benefits.
What is the Alabama standard deduction?
The Alabama standard deduction is income-based, not a fixed amount. Single filers with Alabama AGI of $25,999 or less claim the full $3,000; above that the deduction falls $25 per $500 of AGI to a $2,500 floor at $35,500. Married filing jointly starts at $8,500 and falls $175 per $500 step to a $5,000 floor; Head of Family starts at $5,200 and falls $135 per step to $2,500; Married Filing Separately starts at $4,250 and falls $88 per $250 step from $13,000 to $2,500. You can instead claim itemized deductions (mortgage interest, charitable contributions, etc.) if they exceed your standard deduction.
How much do dependents reduce my Alabama taxes?
The Alabama dependent exemption is tiered by Alabama adjusted gross income: $1,000 per dependent if AGI is $50,000 or less, $500 per dependent from $50,001 to $100,000, and $300 per dependent above $100,000. On top of that you claim a personal exemption of $1,500 (single or married filing separately) or $3,000 (married filing jointly or head of family). A married couple with two dependents and $45,000 of Alabama AGI would get $3,000 in personal exemptions plus $2,000 in dependent exemptions, cutting taxable income by $5,000 before the standard deduction.