Self-Employment Tax Calculator

Estimate self-employment tax, 1099 contractor tax, freelancer quarterly payments, federal income tax, state tax, and the QBI deduction. Built for freelancers, sole proprietors, and gig workers in all 50 states + DC.

Built for real freelancer and 1099 tax planning: estimate self-employment tax, federal income tax, state tax, quarterly payments, and the QBI deduction in one workflow.

Uses the IRS Schedule SE formula: multiply net self-employment income by 92.35% (0.9235), then apply the 15.3% self-employment tax rate — with Social Security wage-base, Medicare, quarterly tax planning, and QBI context layered in automatically.

Enter Your Self-Employment Details

Schedule SE Formula: Why the IRS Uses 92.35% × 15.3%

If you searched for the exact Schedule SE math, the IRS does not apply 15.3% to your full net profit. Instead, it first multiplies your net self-employment income by 0.9235 to get taxable self-employment earnings, then applies the Social Security and Medicare portions of the tax.

Example: $100,000 of net self-employment income becomes $92,350 of taxable SE earnings. Applying the full 15.3% rate to that adjusted amount produces about $14,130 of self-employment tax before income-tax effects. The calculator above handles that workflow automatically.

1099 Tax Calculator, Freelancer Tax Calculator, and Quarterly Estimate — One Workflow

If you searched for a 1099 tax calculator, freelancer tax calculator, or a way to estimate quarterly taxes for self-employed income, this page is designed for that exact workflow. Enter your projected net income, layer in business expenses and any W-2 wages, and use the result to estimate both your annual liability and your quarterly set-aside target.

Most freelancers care about three practical questions: how much tax will I owe?, how much should I set aside from each payment?, and what should I charge so taxes don't crush my take-home pay? Use this calculator for the first question, then pair it with our quarterly tax estimator for payment timing and our freelance rate calculator to turn your after-tax income goal into a profitable client rate.

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Understanding Self-Employment Tax: A Current Planning Guide

Self-employment tax is one of the biggest expenses freelancers, independent contractors, and sole proprietors face — yet it's also one of the most misunderstood. If you work for yourself and earn $400 or more per year, the IRS requires you to pay self-employment (SE) tax in addition to regular federal and state income taxes. This guide explains exactly how self-employment tax works, who pays it, and the most effective strategies to reduce what you owe.

What Is Self-Employment Tax?

Self-employment tax is the combined Social Security and Medicare tax that self-employed individuals must pay. When you work as a W-2 employee, your employer pays half of these taxes (7.65%) and you pay the other half through payroll deductions. But when you're self-employed, you're both the employer and the employee — so you pay the full 15.3%.

The 15.3% breaks down as follows: 12.4% goes to Social Security and 2.9% goes to Medicare. The Social Security portion applies only up to the current annual wage base (this cap adjusts annually for inflation). The Medicare portion has no income cap — it applies to all earnings. Additionally, if your total earnings exceed $200,000 (single filers) or $250,000 (married filing jointly), you owe an extra 0.9% Additional Medicare Tax on the amount above the threshold.

Who Pays Self-Employment Tax?

You must pay self-employment tax if you are a freelancer, independent contractor, gig worker, sole proprietor, or single-member LLC owner with net earnings of $400 or more. This includes income from platforms like Upwork, Fiverr, DoorDash, Uber, and Etsy. Partners in a partnership also pay SE tax on their share of partnership income. However, S-Corp shareholders who pay themselves a reasonable salary only pay employment taxes on that salary — not on distributions, which is why S-Corp election is a popular tax strategy for higher-earning self-employed individuals.

How Self-Employment Tax Is Calculated

The calculation starts with your net self-employment income — your gross revenue minus all deductible business expenses. From there, the IRS applies a 92.35% factor (you multiply by 0.9235) to determine your taxable SE earnings. This factor exists because the IRS effectively gives you a deduction equivalent to the "employer half" of the tax before calculating. Then the 15.3% rate is applied to that adjusted amount.

For example, if your net self-employment income is $100,000: your taxable SE earnings are $92,350 ($100,000 × 0.9235). Your SE tax is $14,130 ($92,350 × 0.153). You then get to deduct half of that — $7,065 — from your adjusted gross income when calculating your income tax.

The 50% SE Tax Deduction

One of the most important tax benefits for self-employed individuals is the ability to deduct 50% of your self-employment tax as an above-the-line deduction. This means it reduces your adjusted gross income (AGI) regardless of whether you itemize deductions or take the standard deduction. It doesn't reduce your SE tax itself — but it does lower your income tax. Our calculator above automatically factors this deduction into your results.

The QBI Deduction (Section 199A)

The Qualified Business Income (QBI) deduction allows eligible self-employed individuals to deduct up to 20% of their qualified business income from their taxable income. Eligibility depends on your taxable income, filing status, and whether you operate a specified service trade or business. Above the relevant thresholds, the deduction can phase out or become limited. This deduction was introduced by the Tax Cuts and Jobs Act and is currently scheduled to sunset unless Congress extends it.

Common Deductions That Reduce Self-Employment Tax

Because self-employment tax is based on your net income, every legitimate business deduction directly reduces your SE tax bill. Here are the most impactful deductions for freelancers:

Quarterly Estimated Tax Payments

Unlike W-2 employees who have taxes withheld from each paycheck, self-employed individuals must make quarterly estimated tax payments to the IRS. If you expect to owe $1,000 or more in taxes for the year, you're generally required to pay estimated taxes four times a year. Missing payments or underpaying can result in penalties. For 2026 planning, the quarterly due dates are generally:

Your quarterly payment should cover both your self-employment tax and your income tax liability. Our calculator provides estimated quarterly amounts so you can plan ahead.

Strategies to Reduce Your Self-Employment Tax

If you are also pricing new client work, use our freelance rate calculator to build taxes directly into your pricing, use the quarterly tax estimator to turn this annual estimate into a payment plan, and read our 1099 tax calculator guide if you specifically earn contractor income.

Beyond maximizing deductions, several strategies can significantly reduce your self-employment tax burden:

Self-Employment Tax vs. Income Tax

It's important to understand that self-employment tax and income tax are two separate obligations. SE tax (15.3%) funds Social Security and Medicare — it's essentially the same as FICA taxes for employees, but you pay both halves. Income tax (10%–37%) is based on your tax bracket and applies to all taxable income from all sources. As a self-employed individual, you pay both. The total effective tax rate for freelancers typically ranges from 25% to 40% depending on income level and state, which is why proper tax planning is essential.

Methodology, Assumptions, and Limitations

This calculator starts with the net self-employment income you enter, subtracts business expenses entered on-page, applies the IRS 92.35% adjustment for SE tax purposes, and then estimates Social Security tax, Medicare tax, the half-SE-tax deduction, federal income tax, an estimated state tax amount, and quarterly payment guidance.

Limitations: this page is helpful for planning but not a substitute for Form 1040, Schedule C, Schedule SE, or advice from a CPA or enrolled agent.

Worked Example

If a freelancer has $100,000 of self-employment income, $10,000 of deductible business expenses, and no W-2 wages, the calculator first reduces income to $90,000 net business income. It then applies the 92.35% SE tax adjustment, calculates Social Security and Medicare taxes on the adjusted amount, and estimates income taxes after the half-SE-tax deduction and QBI logic. The quarterly estimate divides the projected annual liability into planning-friendly payment checkpoints.

Source References

Related tax guides for freelancers and 1099 contractors

Use these pages together if you are trying to decide how much to set aside for 1099 taxes, compare contractor taxes against payroll withholding, or build taxes into your client pricing.

Editorial Transparency

Last updated: March 8, 2026 · Author: CalcSharp Editorial Team · Reviewed by: CalcSharp Finance Review Desk

Educational estimate only. Your actual self-employment tax can differ because of credits, special elections, multi-state income, and return-specific adjustments.

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Frequently Asked Questions

What is self-employment tax and who has to pay it?
Self-employment tax is the Social Security and Medicare tax paid by people who work for themselves. It's 15.3% of net self-employment earnings (12.4% Social Security + 2.9% Medicare). You must pay it if you earn $400 or more in net self-employment income. This covers both the employer and employee portions that W-2 workers split with their employer.
How is self-employment tax calculated?
First, multiply your net self-employment income by 92.35% (0.9235) to get your taxable SE earnings. Then apply 15.3% — 12.4% for Social Security up to the current annual wage base and 2.9% for Medicare with no cap. If your income exceeds the applicable Additional Medicare threshold, an extra 0.9% Medicare tax can apply.
Can I deduct half of my self-employment tax?
Yes. You can deduct 50% of your self-employment tax as an above-the-line deduction on your federal income tax return (Form 1040, Schedule 1). This reduces your adjusted gross income (AGI) and your income tax liability. You get this deduction whether you itemize or take the standard deduction.
What is the QBI deduction and do I qualify?
The Qualified Business Income (QBI) deduction lets eligible self-employed individuals deduct up to 20% of their qualified business income. Eligibility depends on your taxable income, filing status, and whether you operate a specified service trade or business. Above certain thresholds, the deduction can phase out or become limited.
When are quarterly estimated tax payments due for 2026 income?
For 2026 planning, estimated tax payments are generally due on April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027. If you expect to owe $1,000 or more in taxes, you're generally required to make estimated payments to avoid underpayment penalties.
How can I reduce my self-employment tax?
Key strategies include: deducting all legitimate business expenses (home office, supplies, mileage, software), contributing to a SEP IRA or Solo 401(k) to reduce taxable income, taking the QBI deduction, paying family members as employees, and considering S-Corp election if your net income exceeds $50,000–$60,000 to reduce SE tax on a portion of your earnings.
What's the difference between self-employment tax and income tax?
Self-employment tax (15.3%) covers Social Security and Medicare — it's separate from income tax. Income tax is based on your tax bracket (10%–37%) and applies to all taxable income. Self-employed individuals pay both. W-2 employees only pay half the Social Security/Medicare rate (7.65%) because their employer pays the other half.
Do I need to pay state tax on self-employment income?
Most states tax self-employment income as regular income. However, 9 states have no state income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. State tax rates vary from about 1% to over 13% depending on your state and income level.
How much should a freelancer or 1099 contractor set aside for taxes?
A common starting point is to set aside 25% to 35% of net self-employment income for taxes, then refine it based on your federal bracket, state tax, deductions, and quarterly payment history. Many newer freelancers start near 30% until they have real bookkeeping data.
Is this calculator useful for 1099 contractors and freelance quarterly taxes?
Yes. This calculator is built for freelancers, independent contractors, gig workers, sole proprietors, and other 1099 earners. It estimates self-employment tax, income tax, and a quarterly payment target so you can plan cash flow before each due date.