What is Alabama income tax?
Alabama individual income tax is a graduated state income tax. The key idea is simple but often misunderstood: the 5% rate does not apply to every dollar of income. Only the portion of taxable income that reaches the top band is taxed at 5%.
This page is designed as an educational worksheet. It models the major state-tax mechanics but does not replace a completed Alabama return.
Alabama tax brackets explained
For single, head-of-family, and married-filing-separately taxpayers, Alabama uses 2% on the first $500 of taxable income, 4% on the next $2,500, and 5% above $3,000. Married filing jointly uses $1,000 and $6,000 thresholds.
What reduces Alabama taxable income?
The worksheet separates deductions from exemptions. Deductions reduce the income base first; personal and dependent exemptions then reduce the taxable-income figure again.
Standard deduction
Alabama's optional standard deduction varies by filing status and AGI.
Federal tax deduction
Federal income tax paid or accrued can be deductible under Alabama rules.
Itemized deductions
Use the Alabama-allowable itemized amount rather than assuming federal rules are identical.
Overtime change: for 2026 through 2028, Alabama allows a deduction for the premium portion of qualifying overtime wages, capped at $1,000 per taxpayer.
Personal and dependent exemptions
Personal exemptions are $1,500 for single and married-filing-separately taxpayers and $3,000 for married-filing-jointly and head-of-family taxpayers. Dependent exemptions are $1,000 at Alabama income up to $50,000, $500 from $50,001 to $100,000, and $300 above $100,000.
| Filing status | Personal exemption | Top bracket |
|---|---|---|
| Single | $1,500 | 5% over $3,000 |
| Married filing jointly | $3,000 | 5% over $6,000 |
| Married filing separately | $1,500 | 5% over $3,000 |
| Head of family | $3,000 | 5% over $3,000 |
Alabama tax example: a $75,000 single filer
Suppose a single taxpayer has $75,000 of Alabama AGI, a $9,000 federal income tax deduction, a $3,000 standard deduction, one $500 dependent exemption and a $500 overtime premium deduction. The modeled taxable income is:
The state tax is then built progressively. The first dollars enter the 2% band, the next slice enters the 4% band, and the remainder enters the 5% band. That is why the effective rate on AGI can be below the marginal rate.
Alabama local occupational tax
State income tax and local occupational taxes are different layers. Certain Alabama localities impose occupational taxes on earnings. The calculator therefore keeps local-taxable wages separate from Alabama AGI.
| Jurisdiction | Modeled rate | Layer |
|---|---|---|
| Bessemer | 1% | Local occupational |
| Birmingham | 1% | Local occupational |
| Gadsden | 2% | Local occupational |
| Macon County | 1% | Local occupational |
Effective tax rate is not the marginal rate
Your marginal rate is the rate applied to the last taxable dollar. Your effective state rate here is state tax divided by Alabama AGI. These measures answer different questions.
What the graphs are teaching you
The bracket chart shows tax generated in each marginal band. The income-flow chart separates modeled deductions, state tax and remaining income. The sensitivity chart asks how state tax changes as AGI rises while the other assumptions remain fixed.
Use the calculator as a transparent worksheet
Start with Alabama AGI, enter the federal income tax deduction, choose standard or itemized deductions, add exemptions, then inspect the progressive tax. If you are studying paycheck effects, keep local occupational tax separate from state income tax.
Start with the right base
AGI is the starting point in this model; do not automatically substitute gross pay.
Separate layers
State tax, local occupational tax and federal tax are different calculations.
Test scenarios
Change filing status, deductions and dependents to see which assumptions matter.
Alabama Tax Calculator FAQ
Alabama uses graduated rates of 2%, 4%, and 5%. Single, head-of-family, and married-filing-separately taxpayers use $500 and $3,000 thresholds; married filing jointly uses $1,000 and $6,000.
Yes. Alabama's optional standard deduction varies with filing status and AGI, so it is not simply the federal standard deduction.
Alabama allows a deduction for federal income tax paid or accrued, subject to the applicable rules. This calculator asks you to enter that amount rather than recreate the federal return.
The per-dependent amount is $1,000 when Alabama income is $50,000 or less, $500 from $50,001 through $100,000, and $300 above $100,000.
For 2026 through 2028, Alabama allows a deduction for the premium portion of qualifying overtime wages, capped at $1,000 per taxpayer.
Certain localities impose occupational taxes on earnings. They are separate from Alabama state income tax and depend on the applicable locality and work circumstances.
Because 5% applies only to the taxable income above the top threshold. Lower portions are taxed at 2% and 4%, and deductions and exemptions reduce taxable income.
No. It is an educational estimate. A complete return can include additional income categories, adjustments, credits, residency rules and other provisions outside this model.