Tax calculators and invoice tools for freelancers
The calculators and generators are free with no account. The full S-corp report is $49. Your numbers never leave your browser.
Start with this one
Quarterly tax calculator
Enter what you expect to earn this year and what you already have withheld. It works out each quarterly payment both ways, with the safe harbor method and with your current-year numbers, and shows the date each one is due.
Tax year 2026 · IRS Rev. Proc. 2025-32, 2026 Form 1040-ES
Estimate your payment2026 payments it plans around
- Q1
- Q2
- Q3
- Q4
Source: 2026 Form 1040-ES.
Tax calculators
Federal income tax and self-employment tax for 1099 income, at current IRS and SSA figures.
Quarterly tax calculator
Works out each quarterly payment from your expected profit, using the safe harbor or current-year method.
Tax year 2026 · IRS Rev. Proc. 2025-32, 2026 Form 1040-ES
Estimate your payment →Self-employment tax calculator
Splits your Social Security and Medicare tax on net profit and shows the deduction you get back.
Tax year 2026 · SSA 2026 COLA fact sheet
Calculate self-employment tax →S-corp election analyzer
Paid reportEstimates your net saving from the S election for free, after payroll, tax prep, and state costs. The $49 report adds the line-by-line math and your break-even income.
Tax year 2026 · SSA 2026 COLA fact sheet
Analyze the S election →Guides behind these tools
Invoices and estimates
Client-ready PDFs built in your browser. No account, no watermark.
Where the numbers come from
How is self-employment tax calculated?
Take 92.35% of your net profit, then apply 12.4% for Social Security on earnings up to $184,500 and 2.9% for Medicare on all of it. Half of the total comes back as a deduction on your income tax. The free self-employment tax calculator does the arithmetic for your own numbers.
Where do the tax figures come from?
The calculators read every rate, bracket and threshold from one file, sourced to IRS Rev. Proc. 2025-32, the SSA 2026 COLA fact sheet and the 2026 Form 1040-ES. Each tool page lists its sources under the calculator.
When do the figures change?
Once a year, when the IRS publishes its inflation adjustments and the SSA announces the new wage base, usually in October. The tax year on each card changes when the figures do.
Is this tax advice?
No. The tools give educational estimates. They are written by Nicolas Straut, a personal finance writer, not a CPA or enrolled agent. Confirm your own situation with a tax professional.
Do my numbers get saved anywhere?
Your numbers never leave your browser. The calculators run on your device, and invoices and estimates are built as PDFs in your browser.
More on the rules behind the calculators in the quarterly estimated tax guides.