How to estimate self-employment tax as a freelancer

Use the Self-Employed Tax Calculator

Self-employment tax is one of those numbers freelancers tend to notice right after the invoice money has already made plans. That is expensive timing.

This guide explains how to make a conservative educational estimate before tax season starts breathing on your neck. It covers U.S. self-employment tax for Social Security and Medicare. It does not estimate your total tax bill, your federal income tax, your state tax, your local tax, penalties, credits, or the full circus hiding inside an actual return.

Quick answer

For many freelancers, self-employment tax starts with net profit from self-employment, generally multiplies that by 92.35% to estimate net earnings from self-employment, then applies the 15.3% self-employment tax rate.

That 15.3% rate is made of:

12.4% Social Security tax
2.9% Medicare tax

The Social Security portion is capped by the annual contribution and benefit base. For 2026, the Social Security Administration says that base is $184,500. Medicare does not use that same cap, and Additional Medicare Tax can apply above certain thresholds.

Who this is for

This is for U.S. freelancers, consultants, creators, solo founders, and self-employed operators who want a planning estimate for self-employment tax before they build prices, revenue goals, or quarterly cash reserves around vibes.

Use it if you are trying to answer questions like:

How much of my freelance profit might be exposed to self-employment tax?
Why is the calculator not just multiplying my gross revenue by 15.3%?
Where does the 2026 Social Security wage base fit?
What does this estimate leave out?

If you need an accountant-approved number for a return, this is not that. This is business planning math.

What self-employment tax is and is not

The IRS describes self-employment tax as Social Security and Medicare taxes for people who work for themselves. That is the narrow lane.

Self-employment tax is not the same as total tax liability. Freelancers may also owe federal income tax, state tax, local tax, estimated tax payments, penalties, and other amounts depending on their situation.

That distinction matters. If you treat a self-employment tax estimate like your whole tax bill, your plan is underbuilt. If you treat gross revenue like spendable money, your bank account is doing improv.

What the 15.3% self-employment tax rate includes

The standard self-employment tax rate is 15.3%, according to the IRS self-employment tax page.

It has two parts:

12.4% for Social Security
2.9% for Medicare

Employees see Social Security and Medicare taxes split between employee and employer payroll tax. Self-employed people are generally responsible for both sides through self-employment tax. That is why this number feels heavier than a normal paycheck withholding line.

Why only 92.35% of net earnings is generally subject to SE tax

Self-employment tax usually does not apply to 100% of net profit. The IRS generally uses 92.35% of net earnings from self-employment when figuring self-employment tax.

Plain English: the tax calculation adjusts net self-employment profit before applying the Social Security and Medicare rates.

This is also where money language needs to stay clean:

Gross revenue is what clients paid the business.
Net profit is business revenue after business expenses.
Net earnings from self-employment are generally net profit multiplied by 92.35% for this calculation.
Self-employment tax is the Social Security and Medicare tax estimate, not total tax.

Sloppy definitions are how freelancers accidentally turn a planning spreadsheet into decorative fiction.

The $400 net earnings threshold

Generally, self-employment tax applies when net earnings from self-employment are $400 or more. The IRS explains this on both its self-employment tax page and Topic 554.

That does not mean $399 of business revenue is automatically irrelevant. Revenue, expenses, filing requirements, and other tax rules can still matter. It means the common self-employment tax trigger is based on net earnings from self-employment, not gross invoices.

For 2026, the Social Security contribution and benefit base is $184,500, according to the SSA 2026 base determination. The SSA also publishes a contribution and benefit base table.

This matters because the 12.4% Social Security portion of self-employment tax is capped by that base. If you also have wages from employment that were already subject to Social Security tax, those wages can reduce how much Social Security base remains for self-employment earnings.

Medicare is different. The 2.9% Medicare portion does not stop at the Social Security wage base.

Medicare and Additional Medicare Tax thresholds

Medicare tax is part of the standard 15.3% self-employment tax rate. Additional Medicare Tax is separate from the basic 2.9% Medicare portion and can apply above income thresholds.

For Additional Medicare Tax, the IRS thresholds are:

Married filing jointly: $250,000
Married filing separately: $125,000
Single: $200,000
Head of household: $200,000
Qualifying surviving spouse: $200,000

The Additional Medicare Tax rate is 0.9% above the applicable threshold. The calculator uses filing status and Medicare wages to estimate whether self-employment earnings cross that line.

Worked example

Say a freelancer has $80,000 in net profit from self-employment for 2026 and no wages already subject to Social Security or Medicare.

First, estimate net earnings from self-employment:

$80,000 x 92.35% = $73,880

Then estimate the standard 15.3% self-employment tax:

$73,880 x 15.3% = $11,303.64

In this simple case, the full amount is under the 2026 Social Security wage base, and Additional Medicare Tax does not apply.

That does not mean the freelancer’s total tax is $11,303.64. It means the self-employment tax estimate for Social Security and Medicare is about $11,303.64 before considering the employer-equivalent deduction’s income-tax effect.

What this calculator does not estimate

The Self-Employed Tax Calculator does not estimate:

federal income tax
state income tax
local tax
deductions beyond showing the employer-equivalent self-employment tax deduction amount
credits
penalties
QBI
quarterly estimated tax payment requirements
your full tax return outcome

The IRS says the employer-equivalent portion of self-employment tax can be deducted when figuring adjusted gross income. That affects income tax. It does not reduce the self-employment tax calculation itself.

How to use this result in revenue and pricing planning

Self-employment tax planning belongs upstream of pricing. If you wait until money lands in the account, the number gets emotional.

Use the calculator result as one planning input, then connect it to the rest of your business math:

Use the Revenue Goal Calculator to translate tax reserves, owner pay, expenses, and buffers into gross revenue targets.
Use the Freelance Hourly Rate Calculator to make sure your rate covers more than delivery time.
Use the Billable Hours Calculator before pretending every working hour can be sold.
Read freelance revenue goal planning if your revenue target needs a sanity check.
Read how to calculate your freelance hourly rate if your rate still starts with old salary math.

The goal is not perfect prediction. The goal is to stop underpricing because taxes were treated like a surprise guest.

Common mistakes

Confusing SE tax with total tax

Self-employment tax means Social Security and Medicare taxes. It is not your full federal tax picture, and it is definitely not your complete federal, state, and local tax picture.

Using gross revenue instead of net profit

Self-employment tax starts from business profit concepts, not top-line invoice totals. Gross revenue is not profit. Revenue is a scoreboard. Profit is what survived.

Ignoring state tax and income tax

This estimate does not cover federal income tax, state tax, or local tax. Those can be large enough to wreck a reserve plan built around self-employment tax alone.

Forgetting quarterly estimated tax payments may matter

Freelancers often need to think about estimated tax payments during the year. This guide does not calculate those payments. It just reminds you not to treat April as a personality test.

Treating calculator output like accountant-approved advice

Calculator output is useful planning math. It is not a professional review of your books, entity structure, deductions, state rules, or filing obligations.

FAQ

Does self-employment tax include income tax?

No. Self-employment tax refers to Social Security and Medicare taxes. Freelancers may also owe federal income tax, state tax, local tax, and other taxes depending on their situation.

What is the self-employment tax rate?

The self-employment tax rate is 15.3%, made up of 12.4% Social Security tax and 2.9% Medicare tax. Additional Medicare Tax can apply above certain income thresholds.

How much self-employment income triggers self-employment tax?

Generally, you must pay self-employment tax and file Schedule SE if net earnings from self-employment are $400 or more.

Is this self-employment tax calculator tax advice?

No. OwnerMath provides educational estimates for planning. It is not tax, legal, accounting, or financial advice.

Official sources

Disclaimer

OwnerMath provides educational business math, not tax, legal, accounting, or financial advice. This calculator estimates one part of U.S. self-employment tax planning and does not replace a qualified tax professional.