Business calculator
Freelancer Tax Estimator, Quarterly Taxes & Self-Employment Tax
Calculate quarterly estimated tax payments and total tax liability for freelancers and self-employed individuals. Includes self-employment tax and business deductions.
How CalcMesh estimates self-employment tax
Self-employed workers in the United States owe a 15.3% self-employment tax, 12.4% for Social Security plus 2.9% for Medicare, in addition to ordinary income tax. For 2026, the Social Security portion applies up to $184,500 of covered earnings; we also apply the deduction for one-half of self-employment tax that the IRS allows.
We estimate quarterly and annual liability from your net earnings using these published rates, but tax outcomes depend on deductions and state rules we cannot see; our approach is described in our methodology. For filing, consult a qualified tax professional.
How Freelancer Taxes Work
As a freelancer, you receive 1099 forms instead of W-2s. No taxes are withheld, so you pay quarterly. Total tax = Self-Employment tax (15.3% on net SE income) + Federal income tax + State income tax.
2026 Federal Tax Brackets (Single)
| Taxable Income | Rate |
|---|---|
| $0 – $12,400 | 10% |
| $12,400 – $50,400 | 12% |
| $50,400 – $105,700 | 22% |
| $105,700 – $201,775 | 24% |
| $201,775 – $256,225 | 32% |
Top Deductions for Freelancers
- Home office: Dedicated workspace, simplified method: $5/sq ft up to 300 sq ft
- Health insurance: 100% of premiums if not covered elsewhere
- SEP-IRA: Up to 25% of net earnings (max $72,000 in 2026)
- QBI deduction: 20% of qualified business income (if income under thresholds)
- Business vehicle: Use the current IRS standard mileage rate or actual expenses, as applicable.
Related Data
See detailed tax data by state and income level at IRS Tax Topic 409. Compare independent worker statistics and gig economy trends at OSHA.
Disclaimer: This is an estimate for planning purposes only. Tax liability depends on your full situation. Consult a tax professional (CPA) or use tax software. State taxes are NOT included here.
After you estimate
What to do with the numbers
- Set aside the estimated total, not just the SE-tax slice, in a separate savings account each time a client pays you - most freelancers underfund income tax, not just the 15.3% SE portion.
- Compare the quarterly amount shown here against last year's actual liability (Form 1040 + Schedule SE) using the safe-harbor rule, 100-110% of prior-year tax avoids an underpayment penalty even if this year's estimate is off.
- Run the SEP-IRA line at a couple of contribution levels - each dollar contributed lowers this year's taxable net earnings AND builds retirement savings a W-2 employer match would otherwise provide.
- If your state has income tax, remember this tool does not include it, add your state's marginal rate on top before setting aside quarterly funds.
Methodology & Assumptions
This business tool uses contribution-margin and self-employment identities on the figures you enter. Filing positions need a tax professional and your actual books.
How this margin node runs
Break-even and tax estimators use contribution-margin and self-employment identities on the figures you enter. Published domain formulas
govern the identities; when an agency updates rates or thresholds we refresh defaults
and the page lastmod.
| Input | Default | Source / authority |
|---|---|---|
| All inputs | Domain-typical defaults | Editorial methodology, CalcMesh 2026 |