Alabama Self-Employment Tax Calculator (2026)
Federal self-employment tax, federal income tax and Alabama state income tax on 1099 income, plus how much to set aside for each estimated payment.
Federal 2026 and Alabama 2026 data checked against the official publications, last on 2026-09-05 Runs in your browser — nothing you type is sent anywhere, not even when you reload or share the link No sign-up Methodology and data status
- Total tax
- $17,932
- Effective rate
- 24.9%
- Set aside per quarter
- $4,483
- After-tax income
- $54,068
| Breakdown | |
|---|---|
| Net profit (income − expenses) | $72,000 |
| Self-employment tax | $10,173 |
| Social Security (12.4%) | $8,245 |
| Medicare (2.9%) | $1,928 |
| Federal income tax | $4,630 |
| Adjusted gross income | $66,913 |
| Standard deduction | −$16,100 |
| Qualified business income deduction (20%) | −$10,163 |
| Taxable income · marginal rate 12.0% | $40,651 |
| Alabama income tax | $3,128 |
| Total federal + state | $17,932 |
Local income tax (never in the total above): Some Alabama cities levy occupational license taxes (Birmingham 1%, Gadsden 2%, others); they fall mainly on wages earned inside the city and are not included here.
Amounts to set aside, not bills: federal $3,701 for each Form 1040-ES installment (Apr 15, Jun 15, Sep 15, Jan 15). Alabama: $782 per installment on its own schedule. For the safe-harbor amount and payments you have already made, use the quarterly calculator with these inputs.
Alabama and self-employment income
Alabama's brackets are tiny — 2% on the first $500, 4% to $3,000 and 5% above ($1,000 / $6,000 joint) — so nearly all self-employment income is taxed at 5%. What sets Alabama apart is the deduction for federal income tax paid: the income tax on your federal return (after credits) comes off Alabama income, which lowers the effective rate to roughly 3.5%–4.5% for most freelancers. The standard deduction slides from $3,000 to $2,500 (single) or $8,500 to $5,000 (joint) as income rises, the personal exemption is $1,500 / $3,000, and each dependent is worth $1,000, $500 or $300 depending on income. Alabama does not allow the federal deduction for half of self-employment tax; instead the self-employment tax you actually pay during the year is deductible if you itemize — which beats the small standard deduction for many freelancers and is not reflected here.
Alabama rules used by this calculator (2026)
- Alabama applies 3 brackets from 2% to 5% for 2026.
- Standard deduction: $3,000 falling to $2,500 as income rises single, $8,500 falling to $5,000 as income rises married filing jointly, $5,200 falling to $2,500 as income rises head of household — below the federal $16,100 single / $32,200 joint for 2026.
- Deductible: federal income tax paid (after credits), in full.
- Each filer gets a personal exemption that depends on income.
- The per-dependent deduction steps down as income rises.
- The schedule has fixed steps written into the statute: -$2.00 once non-business taxable income exceeds $99,999.
- No Alabama tax is due when income is $4,501 or less ($11,501 joint) before exemptions.
- Alabama does not allow the federal deduction for half of self-employment tax; state tax applies to net profit before that deduction.
- It does allow the self-employed health insurance deduction, SEP-IRA contributions and solo 401(k) contributions on its own return.
- Some Alabama cities levy occupational license taxes (Birmingham 1%, Gadsden 2%, others); they fall mainly on wages earned inside the city and are not included here.
What an Alabama freelancer may still owe
- Alabama requires estimated payments (Form 40ES) when you expect to owe $500 or more.
- Some cities levy an occupational license tax (Birmingham 1%, Gadsden 2%) that mainly reaches wages earned in the city; every business also needs a state and city business privilege license.
What Alabama costs at three levels of profit (2026)
A single filer with no dependents and no other income, taking the standard deduction. The state column is Alabama's own tax after its deductions, exemptions and credits.
| Net profit | Federal | Alabama | Total | Effective rate |
|---|---|---|---|---|
| $50,000 | $9,732 | $2,127 | $11,859 | 23.72% |
| $75,000 | $15,495 | $3,265 | $18,760 | 25.01% |
| $100,000 | $22,365 | $4,348 | $26,713 | 26.71% |
At $75,000 of profit, Alabama takes $3,265 — 17.4% of the total tax bill. Change any input in the calculator above to see your own figures.
How the federal part is worked out
Net profit is 1099 income less business expenses (Schedule C). Self-employment tax is 15.3% of 92.35% of that profit — 12.4% Social Security up to $184,500 of combined wages and earnings, 2.9% Medicare on all of it. Half of that tax, the $16,100 standard deduction ($32,200 joint) and the 20% qualified business income deduction come off before the 2026 brackets are applied; the child tax credit and the earned income credit then reduce what is left, and the refundable parts can offset self-employment tax. The methodology page sets out the full sequence and every rule the calculator leaves out, including how Alabama's figures are derived.
Quarterly estimated tax deadlines (2026)
If you expect to owe $1,000 or more of federal tax for the year, the IRS expects four estimated payments (Form 1040-ES). Alabama runs its own estimated-payment schedule with its own threshold (see above); the calculator shows the federal installment and the Alabama installment separately, and one combined amount to set aside each quarter.
The 2026 dates are April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. The federal amount is split into four equal Form 1040-ES installments after any withholding you entered; paying 100% of last year's tax instead (110% above $150,000 of prior-year AGI) also avoids the penalty. The quarterly calculator works that out and subtracts what you have already paid, and the guide to the due dates explains the rule.
Common questions
Does Alabama tax self-employment income differently from wages?
For state income tax, net profit from self-employment is ordinary income like wages. The self-employment tax itself is federal only; Alabama does not add a state equivalent.
Is half of self-employment tax really deductible?
Yes, for federal tax. The employer-equivalent half is an adjustment to income on Schedule 1, which lowers your AGI and therefore your federal income tax. It does not reduce the self-employment tax itself. Alabama does not allow this deduction for state tax.
Does an LLC change these numbers?
For federal income tax and self-employment tax, a single-member LLC taxed as a sole proprietorship follows exactly the calculation shown here. State and local obligations can still differ: an LLC may be a taxable entity for a state's franchise, gross-receipts or excise tax, and may owe registration or licence fees a sole proprietor does not — Alabama's are listed above. Electing S-corporation status changes the federal arithmetic too (salary plus distributions) and is outside this tool's scope.
What if I moved to Alabama during the year?
Income earned while you were a resident of another state is taxable there under that state's rules. This calculator assumes all income was earned as an Alabama resident.
Data sources and status
Federal figures for 2026: verified · last verified 2026-09-05 · the revenue procedures and forms they were read from, with every other data set
Alabama figures for 2026: verified · last verified 2026-09-08
- Enrolled H.B. 527 of 2026 (Act adding the 2026–2028 overtime deduction), which restates Code of Alabama §40-18-15(b) in full with the 2022+ standard deduction amounts unchanged : read as ALISON's bill PDF on 2026-09-07
- Alabama Department of Revenue : 2025 Form 40 booklet (rates, tax table, exemption tiers, federal income tax deduction worksheet), none of which is indexed; the 2026 booklet is not yet published
- Alabama Department of Revenue : individual income tax rates / FAQ page
- Alabama Department of Revenue : 2025 Form 40 booklet, lines 17–27 and Schedule OC: no earned income credit, child credit or low-income credit exists; the federal EIC and additional child tax credit only reduce the federal income tax deduction
- Alabama Department of Revenue : 2025 Form 40 booklet, p.8 (line 9: self-employed persons may deduct health insurance premiums to the same extent as allowed for federal purposes) and p.16, Part II line 2 (Keogh retirement plan and SEP deduction: contributions to a Keogh plan deductible from gross income, including qualified SEP contributions) and line 7 (self-employed health insurance deduction); 2025 Form 40 p.2, Part II lines 2 and 7
- IRS Publication 560 : a qualified plan that covers a self-employed individual is a Keogh (H.R. 10) plan — the basis for taking a one-participant 401(k) on Alabama's Keogh line
Alabama Department of Revenue · How figures are checked · Corrections log
Other states
Paying as you go? The quarterly estimated tax calculator applies the federal safe harbor and subtracts what you have already paid.