Alabama Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and Alabama state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
AL State Tax: Progressive 2.0% - 5.0%
Quarterly Payment Amount
$6,512
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,512
Apr 1 - May 31
Due: June 15, 2026
$6,512
Jun 1 - Aug 31
Due: September 15, 2026
$6,512
Sep 1 - Dec 31
Due: January 15, 2027
$6,512
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
Alabama Quarterly Tax Highlights
Alabama has 3 tax brackets with rates from 2% to 5%
Self-employed individuals must pay quarterly estimated taxes
Alabama allows federal income tax deduction on state returns
File Form 40ES for quarterly estimated payments
Alabama Quarterly Tax FAQ
What is the Alabama state income tax rate for self-employed?
Alabama has a progressive income tax with 3 brackets: 2% on first $500 (single) or $1,000 (married), 4% on income up to $3,000/$6,000, and 5% on income above that. Self-employed individuals pay the same rates on their net self-employment income.
When are Alabama quarterly taxes due?
Alabama quarterly estimated tax payments follow federal due dates: April 15, June 15, September 15, and January 15 of the following year. Use Form 40ES to make payments.
Can I deduct federal taxes on my Alabama return?
Yes, Alabama is one of few states that allows a deduction for federal income taxes paid. This can significantly reduce your Alabama tax liability.
Alabama Estimated Quarterly Tax Payments for Self-Employed Workers in 2026
Self-employed workers in Alabama must pay both federal estimated taxes to the IRS and state estimated taxes to the Alabama Department of Revenue. Alabama has a progressive income tax with 3 brackets and rates ranging from 2% to 5%. If you expect to owe $500 or more in Alabama state income tax after withholding and credits, you must make quarterly estimated payments using Form 40ES.
Alabama is one of the few states that allows a deduction for federal income taxes paid on your state return, which can significantly reduce your Alabama tax liability.
| Tax Layer | Rate / Range | Filed With | Form |
|---|---|---|---|
| Federal income tax | 10% – 37% | IRS | 1040-ES |
| Self-employment tax | 15.3% | IRS | 1040-ES / SE |
| Alabama state income tax | 2% to 5% | Alabama Department of Revenue | Form 40ES |
How Alabama Income Tax Affects Your Quarterly Payments
Alabama taxes personal income — including self-employment income — across 3 progressive brackets. The brackets below apply to single filers for tax year 2026. Married filing jointly thresholds are typically higher.
| Bracket | Taxable Income (Single) | Marginal Rate |
|---|---|---|
| 1 | $0 – $500 | 2.0% |
| 2 | $500 – $3,000 | 4.0% |
| 3 | $3,000+ | 5.0% |
To estimate your Alabama quarterly payment, calculate your projected state tax liability using the brackets above, then divide by four. Alabama payments are made to the Alabama Department of Revenue through their online portal at revenue.alabama.gov or by mail using Form 40ES.
Federal Self-Employment Tax and Quarterly Due Dates
All self-employed workers must pay federal self-employment (SE) tax of 15.3% on 92.35% of net earnings. This consists of 12.4% for Social Security (on earnings up to $184,500 in 2026) and 2.9% for Medicare (no cap). An additional 0.9% Medicare surtax applies to earnings above $200,000 (single filers).
Both Alabama and federal estimated tax payments follow the same quarterly schedule:
| Quarter | Income Period | Due Date |
|---|---|---|
| Q1 | January 1 – March 31 | April 15, 2026 |
| Q2 | April 1 – May 31 | June 15, 2026 |
| Q3 | June 1 – August 31 | September 15, 2026 |
| Q4 | September 1 – December 31 | January 15, 2027 |
To avoid underpayment penalties, pay at least 100% of your prior-year tax liability (or 110% if your AGI exceeds $150,000) spread across four equal payments, or at least 90% of your current-year tax. You can deduct 50% of your self-employment tax from your adjusted gross income, reducing both your federal and Alabama taxable income.
Related Calculators
Official References
This calculator uses current federal and Alabama tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- Alabama Department of Revenue
Official Alabama tax authority
- Alabama Form 40ES
Quarterly estimated tax payment form and instructions
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.