Freelance Self-Employment Tax Calculator: What the 15.3% Really Costs You
Turn your net freelance profit into an exact Social Security and Medicare bill — with the 92.35% adjustment, the wage cap, the deductible half and a quarterly payment plan you can actually follow.
Updated September 16, 2026 · 12 min read
Freelance pricing strategist and founder of FreelancerMetrics. Ten years reading freelance P&Ls — first at an agency, now solo.
The formula: self-employment tax = (net profit × 0.9235) × 15.3%, then deduct half against income tax and reserve the total across four quarterly payments.
The tax employees never see on their payslip
Every employed person in America pays 7.65% FICA out of their paycheck, and their employer quietly pays a matching 7.65% they never look at. The moment you start freelancing, both halves become yours. That is self-employment tax: 15.3%, charged before a single dollar of federal income tax is calculated.
It is the single biggest reason a $90,000 freelance year feels thinner than a $90,000 salary. It is also the most predictable tax a freelancer faces, because it is a flat percentage of profit with no brackets to navigate — which means it can be planned for exactly, reserved automatically, and priced into your rate from day one.
The five steps below give you the real number rather than a rule of thumb, and the worked example follows $118,000 of revenue all the way down to a quarterly payment you can schedule this week.
How to calculate your self-employment tax in 5 steps
- 01
Find your net self-employment earnings
Self-employment tax is charged on profit, not on revenue. Take everything clients paid you across the year and subtract your ordinary and necessary business expenses: software, hardware, professional insurance, your home-office deduction, mileage, contractor payments, bank and platform fees. The number left is your net profit, and it is the only figure the calculation cares about.
- 02
Multiply net profit by 92.35%
The IRS does not tax the whole profit. It applies the rate to 92.35% of net earnings, which approximates the employer-side deduction an employee's company would have taken. On $95,000 of profit, the taxable base is $87,732. Skipping this step is the most common reason a DIY estimate comes out several hundred dollars too high.
- 03
Apply 15.3% — but check the Social Security wage cap
The 15.3% splits into 12.4% Social Security and 2.9% Medicare. Social Security only applies up to an annual wage base (roughly $176,000 for 2025 earnings, indexed each year); Medicare has no ceiling, and an extra 0.9% Medicare surtax applies above $200,000 single or $250,000 married filing jointly. Most freelancers sit below the cap and pay the flat 15.3% on the whole base.
- 04
Deduct the employer-equivalent half
You get to deduct half of the self-employment tax when calculating your adjusted gross income. It does not reduce the SE tax itself, but it reduces the income tax stacked on top. On $95,000 of profit, the roughly $13,423 of SE tax produces a $6,711 above-the-line deduction — worth around $1,500 in federal income tax at a 22% marginal rate.
- 05
Add income tax and split it into four quarterly payments
Self-employment tax is only half the bill. Federal income tax, and state income tax if your state charges one, stack on top of it. Total the two, divide by four, and pay on the quarterly estimated deadlines in April, June, September and January. Pay at least 90% of the current year or 100% of last year's total (110% at higher incomes) to stay inside the safe harbour and avoid penalties.
A worked example: $118,000 of freelance revenue
A solo freelancer, single filer, taking the standard deduction, with tidy expense records. Watch how $118,000 in the bank becomes a $6,831 payment every quarter.
| Line | Value | Notes |
|---|---|---|
| Gross freelance revenue | $118,000 | All client payments and 1099 income |
| Business expenses | $23,000 | Software, hardware, insurance, home office, fees |
| Net self-employment profit | $95,000 | Revenue minus expenses |
| Taxable base (92.35%) | $87,732 | $95,000 × 0.9235 |
| Self-employment tax (15.3%) | $13,423 | Social Security 12.4% + Medicare 2.9% |
| Deductible half | $6,711 | Reduces taxable income, not SE tax |
| Estimated federal income tax | $13,900 | Single filer, standard deduction, no QBI applied |
| Total federal reserve needed | $27,323 | About 29% of net profit |
| Quarterly payment | $6,831 | Four equal estimated payments |
Self-employment tax at different profit levels
Because the rate is flat below the Social Security wage base, the effective bite on profit stays close to 14.1% across most freelance income levels. Federal and state income tax stack on top of these figures.
| Net profit | Taxable base (92.35%) | Self-employment tax | Effective rate on profit |
|---|---|---|---|
| $30,000 | $27,705 | $4,239 | ~14.1% |
| $50,000 | $46,175 | $7,065 | ~14.1% |
| $75,000 | $69,263 | $10,597 | ~14.1% |
| $95,000 | $87,732 | $13,423 | ~14.1% |
| $150,000 | $138,525 | $21,194 | ~14.1% |
Eight signs self-employment tax is about to hurt
This is a predictable bill. Every item below turns it into an unpredictable one.
- !You budget for income tax but have never named the 15.3% separately
- !You calculate the tax on revenue instead of profit
- !You skip the 92.35% step and overpay your own estimate
- !You have never made a quarterly estimated payment
- !Your tax reserve lives in the same account as your grocery money
- !You have no record of home-office square footage or business mileage
- !Your rate was set without any tax line inside it
- !You found out about the deductible half from your accountant, in April
The deductions that shrink the base
Because the 15.3% lands on profit, every expense you legitimately deduct saves you roughly 14 cents in self-employment tax plus your marginal income tax rate on top. A $6,000 home-office and equipment total that a freelancer never claims is not a $6,000 oversight — it is closer to $2,000 of real money handed over.
The reliably missed ones are the home-office deduction (simplified method: a set amount per square foot up to 300 square feet), business mileage, a share of phone and internet, professional development, accounting software and fees, business insurance, and the health insurance premium deduction for self-employed people. That last one reduces income tax but not self-employment tax — a distinction worth remembering.
What does not qualify: commuting to a client's office, ordinary clothing, meals without a business purpose, and anything you would have bought regardless of the business. The test is ordinary and necessary for your trade, and the evidence is a receipt plus a one-line note about why.
Quarterly payments without the anxiety
The system that works for most freelancers is mechanical rather than disciplined. Open a separate savings account the bank cannot sweep. The day any client payment clears, move 30% of it across. Never look at that account between quarters. When a deadline arrives, pay directly from it through the IRS Direct Pay or EFTPS.
The safe harbour rule protects you from penalties even in a year when income spikes: pay 100% of last year's total federal tax (110% if your prior-year adjusted gross income exceeded $150,000) spread across four payments, and the IRS will not penalise you regardless of what this year actually turns out to be. For a freelancer with unpredictable income, that is the easiest rule to follow.
One nuance that catches people: income earned unevenly can be reported with the annualized income installment method, which lets a freelancer who earned nothing until September avoid penalties for the earlier empty quarters. It requires Form 2210 and a little patience, but it can be worth several hundred dollars in a lumpy year.
Where self-employment tax belongs in your pricing
A freelancer who wants to take home $6,000 a month does not need to bill $6,000 a month. After a 30% combined federal and state reserve and roughly $1,000 a month in business costs, they need closer to $9,600. That gap is not overhead padding — it is the visible cost of being your own employer.
This is why the honest comparison against a salaried job adds roughly 25 to 30 percent onto the salary before you convert it into a rate. A $90,000 job is not a $90,000 freelance target; it is closer to $125,000 of billings once self-employment tax, health insurance and unpaid time are all carried by you.
Build the reserve into the rate and everything downstream gets calmer. You stop treating a tax payment as a loss, quarterly deadlines become routine transfers, and you can quote confidently because the number already contains the bill.
Frequently asked questions
What is a freelance self-employment tax calculator?
It is a tool that turns your net freelance profit into the exact Social Security and Medicare contribution you owe as your own employer. It applies the 92.35% net-earnings adjustment, the 15.3% combined rate, the Social Security wage cap and the deductible employer half — the four pieces that a rough percentage guess always gets wrong.
How much is self-employment tax in 2026?
The combined rate remains 15.3%: 12.4% for Social Security and 2.9% for Medicare. It is applied to 92.35% of your net self-employment earnings, so the effective bite on profit is about 14.13%. Social Security stops at the annual wage base, which is indexed upward each year; Medicare continues on every dollar.
Do I pay self-employment tax on revenue or profit?
Profit. Every legitimate business expense you deduct reduces the base the 15.3% is applied to. A freelancer with $118,000 in revenue and $23,000 in expenses pays self-employment tax on $95,000, not on $118,000 — a difference of well over $3,000. Thorough expense tracking is the cheapest tax strategy a freelancer has.
When do I have to start paying self-employment tax?
Once your net self-employment earnings reach $400 in a year, you owe it and must file Schedule SE. There is no grace period for side hustles. If you expect to owe $1,000 or more in total federal tax, the IRS also expects quarterly estimated payments rather than one payment in April.
What is the 92.35% adjustment for?
Employees never pay FICA on the employer's half of their payroll tax, so the IRS levels the field by exempting the equivalent portion of your profit. Multiplying net earnings by 0.9235 before applying 15.3% is how that exemption is applied in practice. It reduces the effective rate on profit from 15.3% to roughly 14.13%.
Can I deduct self-employment tax?
You can deduct half of it as an above-the-line adjustment to income. That deduction reduces the income tax you owe, not the self-employment tax itself. It applies whether or not you itemize, so every freelancer gets it — but only if the return is prepared correctly, which is one reason a software package or a CPA earns its fee.
How much should I set aside for self-employment and income tax combined?
For most solo freelancers, 25% to 35% of net profit covers both federal obligations and a state income tax. Freelancers in no-income-tax states such as Texas and Florida can usually reserve toward the lower end; California and New York freelancers should plan toward the higher end. Move the reserve on the day each payment lands.
Can an S-corp election reduce my self-employment tax?
It can, once profit is consistently high. An S-corp lets you split income between a reasonable salary — which carries payroll tax — and distributions, which do not attract self-employment tax. The crossover usually sits somewhere around $80,000 to $100,000 of net profit, after payroll, filing and accounting costs of roughly $1,500 to $3,000 a year. Model it with a CPA before electing.
What happens if I miss a quarterly estimated payment?
The IRS charges an underpayment penalty calculated as interest on the shortfall for the days it stayed unpaid. It is not catastrophic on one missed quarter, but it compounds. If you fall behind, pay as soon as you can rather than waiting for the next deadline — the penalty is time-based, so early partial payment reduces it.
Does the QBI deduction change my self-employment tax?
No. The qualified business income deduction of up to 20% reduces taxable income for income tax purposes only; self-employment tax is calculated before it and is untouched. Many freelancers conflate the two and under-reserve as a result. Treat them as separate calculations that happen to appear on the same return.
How do I build self-employment tax into my hourly rate?
Divide your target take-home by one minus your combined effective tax rate, then divide by billable hours. At a 30% combined rate, a freelancer who needs $70,000 in their pocket must bill $100,000 of profit — and at 1,200 billable hours that is $83 an hour before any positioning premium. Tax belongs in the rate, not in a surprise.
Do I still owe self-employment tax if I also have a W-2 job?
Yes, on your freelance profit. Your W-2 wages count toward the Social Security wage base first, so if your salary already exceeds that cap, your freelance income only attracts the 2.9% Medicare portion plus any surtax. Coordinating the two is where a freelancer with a day job most often overpays.
Price your work so self-employment tax is already covered
Enter your living costs, business expenses, tax reserve and billable hours to get a rate that pays the 15.3% before it reaches your pocket.
Open the calculator →About the author
Freelance pricing strategist · Founder, FreelancerMetrics
Javed spent a decade setting rates on both sides of the table — first quoting projects inside a digital agency, then running an independent practice. He now builds pricing tools used by freelancers in over 40 countries, and every guide here is based on real quotes, invoices and negotiations rather than recycled advice.
- 10+ years pricing freelance and agency work
- Reviewed 400+ freelancer P&Ls and rate cards
- Builder of the FreelancerMetrics rate calculators
- Writes only from first-hand client and invoice data
Sources & methodology
Benchmarks in this guide come from public data and from anonymised rate and invoice figures shared by FreelancerMetrics users. Where a number is an estimate rather than a published statistic, it is labelled as such in the text. Primary references:
- 1Self-Employment Tax (Social Security and Medicare Taxes)IRS
The 15.3% combined rate and the 92.35% net-earnings basis used in our tax estimates.
- 2Self-Employed Individuals Tax CenterIRS
Self-employment tax rate, quarterly estimated payment rules and deductible business expenses.
- 3Financial reporting and profitability guidanceAICPA & CIMA
Standard gross-margin and net-profit definitions used in our profit calculations.
- 4Freelance contracts, payment and rate resourcesFreelancers Union
Contract terms, late-payment protections and independent-worker income guidance.
Last reviewed August 4, 2026 by Javed Niamat. Tax and benefit figures are US-centric; check your local authority before filing.