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 per filer), and $1,000 for each qualifying 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, meaning it phases down as your income rises. A single filer with AGI below about $25,500 gets the full $3,000 deduction; for higher incomes the deduction shrinks by $25 for every $500 of AGI above that threshold, down to a floor of $2,500. Married couples filing jointly can claim up to $8,500 (floor $7,500). Head of Household filers get up to $5,200. On top of the standard deduction, every Alabama taxpayer claims a personal exemption ($1,500 for single filers, $3,000 for married filing jointly) and $1,000 for each qualifying dependent. These exemptions reduce taxable income directly and can make a meaningful difference for families.
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. For single filers with Alabama AGI up to about $25,500, the full $3,000 deduction applies. Above that threshold, the deduction phases down by $25 for every $500 of additional AGI, with a minimum of $2,500. Married couples filing jointly get up to $8,500 (minimum $7,500), Head of Household up to $5,200, and Married Filing Separately up to $4,250. 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?
Each qualifying dependent reduces your Alabama taxable income by $1,000. This is called the dependent exemption. On top of that, you also claim a personal exemption of $1,500 (single) or $3,000 (married filing jointly). A family of four with two dependents, for example, would get $3,000 in personal exemptions plus $2,000 in dependent exemptions, reducing taxable income by $5,000 before applying the standard deduction.