US Self-Employment Tax Calculator (2026)

Q: What is the Social Security wage base for 2026?

$184,500 (up from $176,100 in 2025), set annually by the Social Security Administration. The 12.4% Social Security portion of SE tax applies only to earnings up to this amount; the 2.9% Medicare portion has no ceiling. If you also have W-2 wages, those count toward the base first — this us self employment tax calculator reduces the SE-taxable base accordingly.

Q: What is the additional Medicare tax?

An extra 0.9% on earnings above $200,000 single / $250,000 married filing jointly ($125,000 married filing separately). Unlike the wage base, these thresholds are set by statute and do not adjust for inflation — they have been fixed since 2013. On a joint return the threshold applies to the couple's combined earnings, while the Social Security wage base is per person. This us self employment tax calculator models it; most quick estimators skip it.

Q: Can I deduct self-employment tax?

In this us self employment tax calculator, Half of it, yes. You deduct the employer-equivalent half of SE tax from adjusted gross income on Schedule 1 — and it is an above-the-line deduction, so you get it whether you itemize or take the standard deduction. On $100,000 of net income the deduction is about $7,065, which saves roughly $1,554 of income tax at the 22% marginal rate. It does not reduce the SE tax itself — only the income-tax side.

Q: What is the difference between the effective and marginal tax rate?

Using this us self employment tax calculator, Effective rate = total tax ÷ total income — your average burden, the number for savings planning (set aside this share of every invoice). Marginal rate = the tax on your next dollar — your pricing number (a project must clear this to be worth taking). For the $100,000 example: effective 25.7%, marginal 37.3%. New freelancers who price using the effective rate undercharge; use the marginal rate when deciding whether extra work is worth it.

Q: Do I have to pay quarterly estimated taxes?

With this us self employment tax calculator, Almost certainly yes. The US is pay-as-you-go: with no employer withholding, you make four estimated payments (typically April 15, June 15, September 15, and January 15). Underpay and you owe an underpayment penalty plus the tax. The safe harbor: pay at least 90% of the current year's tax or 100% of last year's (110% if AGI exceeded $150,000). Use this tool's quarterly figure as your starting point and the quarterly estimated tax calculator for the full schedule.

Q: Does the QBI deduction reduce self-employment tax?

No — and this is a common and costly misunderstanding. The 20% qualified business income (Section 199A) deduction reduces income tax only; it does not reduce net earnings subject to SE tax. You still owe the full 15.3% on your SE-taxable earnings. This us self employment tax calculator excludes QBI (eligibility rules are complex); model it separately with the QBI deduction estimator and treat any income-tax savings as a bonus on top of the SE tax shown here.

Q: Should I form an S-corp to reduce self-employment tax?

Sometimes — above roughly $80,000 of net income. An S-corp lets you pay yourself a "reasonable salary" (subject to payroll tax) and take the rest as distributions exempt from SE tax. The savings can be thousands per year, but you gain payroll filings, stricter bookkeeping, and the reasonable-salary audit risk. Run the numbers with the S-corp vs sole prop calculator before deciding — and get professional advice, since the salary/distribution split is where the IRS looks hardest.

Your results

SE-taxable earnings (92.35%)—Net SE income × 92.35% — the employer-equivalent adjustment.

Social Security tax (12.4%)—Only up to the $184,500 wage base, reduced by W-2 wages already taxed.

Medicare tax (2.9%)—No cap — applies to every dollar of SE-taxable earnings.

Additional Medicare tax (0.9%)—On combined earnings above $200,000 single / $250,000 MFJ.

Total self-employment tax—Your "both halves" payroll tax.

Deductible half of SE tax—Subtracted from AGI on Schedule 1 — softens the income-tax side.

Federal income tax—Through the 2026 brackets after the standard deduction.

Total federal tax (SE + income)—The number to plan around.

Effective rate—Total tax ÷ total income.

Marginal rate (next dollar)—SE marginal + income-tax marginal combined.

Quarterly estimated payment—Total ÷ 4 — the check you should be writing each quarter.

Verdict—

us self employment tax calculator — geometric illustration

Us self employment tax calculator helps you get a clear answer in seconds. Working for yourself has a hidden price tag that surprises almost every new freelancer: self-employment tax. Employees split payroll taxes with their employer — each side pays 7.65%. When you are both the employee and the employer, you pay the full 15.3% on top of ordinary federal income tax. This self employment tax calculator 2026 gives you the answer in seconds.

This us self employment tax calculator shows the complete 2026 picture for US freelancers, sole proprietors, and independent contractors. Enter your net self-employment income (revenue minus business expenses), filing status, and any other income. It computes your SE tax — 12.4% Social Security on the first $184,500 of the wage base plus 2.9% Medicare on everything, applied to 92.35% of net earnings — then subtracts half of that SE tax from your adjusted gross income (as the IRS allows), runs the remainder through the 2026 federal brackets, and returns your total bill, your effective rate, your marginal rate on the next dollar earned, and your quarterly estimated payment amounts.

Estimate only — not professional tax advice. Figures are the verified 2026 values (Social Security wage base $184,500; standard deduction $16,100 single / $32,200 MFJ; 0.9% additional Medicare tax over $200,000 single / $250,000 MFJ) sourced from IRS and Social Security Administration publications. State income tax is not included — see the state tax calculator for that layer. Credits, itemized deductions, and the QBI deduction are simplified or excluded; all omissions are disclosed below. Verify current figures with the IRS before filing.

Check the tax treatment before you settle a rate.

US Self-Employment Tax Calculator (2026): Key takeaways

A freelancer with $100,000 of net self-employment income owes about $25,745 in 2026: $14,129.55 SE tax + $11,615.75 federal income tax — an effective rate of 25.7%.
SE tax is 15.3% on 92.35% of net earnings: 12.4% Social Security (only to the $184,500 wage base) + 2.9% Medicare (no cap). High earners also owe 0.9% additional Medicare over $200,000 single / $250,000 MFJ.
Half of your SE tax is deductible from adjusted gross income — the IRS lets you subtract the employer-equivalent half before income tax is computed.
2026 federal brackets run 10% to 37%; standard deduction is $16,100 single / $32,200 married filing jointly (verified against IRS figures for tax year 2026).
Divide your total by four to get quarterly estimated payments — underpaying triggers penalties; see the quarterly estimated tax calculator for deadlines and safe-harbor math.
State income tax, credits, itemized deductions, and the QBI deduction are not modeled — this is a federal SE + income tax estimate only.

How the US Self-Employment Tax Calculator (2026) works

Enter net self-employment income — revenue minus business expenses, your Schedule C profit — plus filing status and any other income. Deductible retirement contributions (SEP-IRA, Solo 401(k)) reduce AGI and income tax, not SE tax.
SE tax is computed first: net earnings × 92.35% gives SE-taxable earnings (the 7.65% haircut mirrors the employer share employees never see). Then 12.4% Social Security applies up to the $184,500 wage base — reduced dollar-for-dollar by W-2 wages already subject to Social Security — and 2.9% Medicare applies with no cap.
If combined earnings exceed $200,000 single / $250,000 MFJ, 0.9% additional Medicare tax applies above the threshold.
Half of the SE tax is deductible from adjusted gross income on Schedule 1 — the employer-equivalent half. The calculator subtracts it (and your retirement contributions) before income tax.
Taxable income is AGI minus the standard deduction ($16,100 single / $32,200 MFJ for 2026), taxed slice-by-slice through the 2026 brackets: 10/12/22/24/32/35/37%.
The calculator totals both taxes, then derives the effective rate (total ÷ income — your planning number) and the marginal rate (what the next dollar costs — your pricing number).
Divide the total by four for quarterly estimated payments, and pair this with the quarterly estimated tax calculator for deadlines and safe-harbor rules.

US Self-Employment Tax Calculator (2026): worked example

$100,000 net self-employment income, single, 2026:

SE-taxable earnings: $100,000 × 92.35% = $92,350.00
Social Security: $92,350 × 12.4% = $11,451.40 (below the $184,500 wage base, so the full 12.4% applies)
Medicare: $92,350 × 2.9% = $2,678.15 (no cap)
Additional Medicare: $0 (below the $200,000 threshold)
Total SE tax: $14,129.55 → deductible half: $7,064.78
AGI: $100,000 − $7,064.78 = $92,935.22
Taxable income: $92,935.22 − $16,100 = $76,835.22
Federal income tax: $12,400 × 10% ($1,240) + $38,000 × 12% ($4,560) + $26,435.22 × 22% ($5,815.75) = $11,615.75
Total: $14,129.55 + $11,615.75 = $25,745.30 → effective rate 25.7%
Marginal rate: 15.3% SE + 22% income = 37.3% on the next dollar
Quarterly payment: $25,745.30 ÷ 4 = $6,436.32

Why the SE tax stings: $14,129.55 of SE tax before a single dollar of income tax. An employee earning $100,000 sees only $7,650 of FICA withheld — the employer invisibly pays the other half. The self-employed pay both halves, then get the small consolation of deducting half of it from AGI.

Second example — $60,000 net, married filing jointly: SE base $55,410 → SE tax $8,477.73 (SS $6,870.84 + Medicare $1,606.89); deductible half $4,238.87; AGI $55,761.13; taxable $23,561.13 (after $32,200 standard deduction); federal tax $2,351.34; total $10,829.07; effective 18.0%; quarterly $2,707.27. The larger MFJ standard deduction visibly softens the income-tax side.

Third example — $250,000 net, single: SE base $230,875 → Social Security on first $184,500 = $22,878; Medicare $6,695.38; additional Medicare ($230,875 − $200,000) × 0.9% = $277.88; total SE $29,851.26. This is where the wage-base cap starts to matter: the SS portion stops growing, so the SE marginal rate drops from 15.3% to 2.9% (+0.9% above $200k) on additional earnings.

US Self-Employment Tax Calculator (2026): frequently asked questions

What is self-employment tax?

In this us self employment tax calculator, The freelancer's version of payroll (FICA) taxes. Employees split Social Security and Medicare taxes with their employer — 7.65% each. Self-employed people pay both halves: 15.3%, reported on Schedule SE. It applies to net earnings (profit after business expenses), not gross revenue, and it stacks on top of ordinary federal income tax. The 15.3% breaks into 12.4% Social Security (to the annual wage base) and 2.9% Medicare (no cap).

Why is SE tax calculated on 92.35% of earnings instead of 100%?

In this us self employment tax calculator, To mirror what employees get. A W-2 employee never pays Social Security or Medicare tax on the employer's share of FICA — it is excluded from their wages. The 92.35% factor (100% − 7.65%) gives self-employed people the same treatment on the employer-equivalent half. It is a small but real discount: on $100,000 of net income it shaves about $1,174 off the SE tax versus taxing the full amount.

What is the Social Security wage base for 2026?

$184,500 (up from $176,100 in 2025), set annually by the Social Security Administration. The 12.4% Social Security portion of SE tax applies only to earnings up to this amount; the 2.9% Medicare portion has no ceiling. If you also have W-2 wages, those count toward the base first — this us self employment tax calculator reduces the SE-taxable base accordingly.

What is the additional Medicare tax?

An extra 0.9% on earnings above $200,000 single / $250,000 married filing jointly ($125,000 married filing separately). Unlike the wage base, these thresholds are set by statute and do not adjust for inflation — they have been fixed since 2013. On a joint return the threshold applies to the couple's combined earnings, while the Social Security wage base is per person. This us self employment tax calculator models it; most quick estimators skip it.

Can I deduct self-employment tax?

In this us self employment tax calculator, Half of it, yes. You deduct the employer-equivalent half of SE tax from adjusted gross income on Schedule 1 — and it is an above-the-line deduction, so you get it whether you itemize or take the standard deduction. On $100,000 of net income the deduction is about $7,065, which saves roughly $1,554 of income tax at the 22% marginal rate. It does not reduce the SE tax itself — only the income-tax side.

What are the 2026 federal tax brackets and standard deduction?

In this us self employment tax calculator, Per IRS figures for tax year 2026: standard deduction $16,100 single / $32,200 married filing jointly ($24,150 head of household). Single brackets: 10% to $12,400; 12% to $50,400; 22% to $105,700; 24% to $201,775; 32% to $256,225; 35% to $640,600; 37% above. MFJ brackets are roughly doubled. Rates are unchanged from 2025; thresholds rose with inflation.

What is the difference between the effective and marginal tax rate?

Using this us self employment tax calculator, Effective rate = total tax ÷ total income — your average burden, the number for savings planning (set aside this share of every invoice). Marginal rate = the tax on your next dollar — your pricing number (a project must clear this to be worth taking). For the $100,000 example: effective 25.7%, marginal 37.3%. New freelancers who price using the effective rate undercharge; use the marginal rate when deciding whether extra work is worth it.

Do I have to pay quarterly estimated taxes?

With this us self employment tax calculator, Almost certainly yes. The US is pay-as-you-go: with no employer withholding, you make four estimated payments (typically April 15, June 15, September 15, and January 15). Underpay and you owe an underpayment penalty plus the tax. The safe harbor: pay at least 90% of the current year's tax or 100% of last year's (110% if AGI exceeded $150,000). Use this tool's quarterly figure as your starting point and the quarterly estimated tax calculator for the full schedule.

Does the QBI deduction reduce self-employment tax?

No — and this is a common and costly misunderstanding. The 20% qualified business income (Section 199A) deduction reduces income tax only; it does not reduce net earnings subject to SE tax. You still owe the full 15.3% on your SE-taxable earnings. This us self employment tax calculator excludes QBI (eligibility rules are complex); model it separately with the QBI deduction estimator and treat any income-tax savings as a bonus on top of the SE tax shown here.

Should I form an S-corp to reduce self-employment tax?

Sometimes — above roughly $80,000 of net income. An S-corp lets you pay yourself a "reasonable salary" (subject to payroll tax) and take the rest as distributions exempt from SE tax. The savings can be thousands per year, but you gain payroll filings, stricter bookkeeping, and the reasonable-salary audit risk. Run the numbers with the S-corp vs sole prop calculator before deciding — and get professional advice, since the salary/distribution split is where the IRS looks hardest.

Does this include state income tax?

No — federal only. State treatment varies enormously: Texas and Florida charge no income tax at all, while California tops out at 13.3%. Adding the state layer is essential for real planning; use the state-by-state freelancer tax calculator and add its result to the federal total from this tool. Together the two give the full picture.

Is this tax advice?

No. This is a planning estimate built on 2026 IRS/SSA figures with disclosed simplifications: federal only, standard deduction (no itemizing), no credits, no QBI deduction, and the additional-Medicare threshold applied to combined earnings. The IRS publications always win over any calculator. For incorporation decisions, multi-state income, or anything consequential, work with a CPA or enrolled agent.

Sources for the US Self-Employment Tax Calculator (2026)

Last verified: 2026-09-26 This calculator is for general information only and is not tax advice. Tax rules change frequently — verify with a qualified professional before acting.