Know what you owe.
Free tax calculators and plain-English guides for freelancers, contractors, and the self-employed. No signup, no spam, and your numbers never leave your browser.
Free · No signup · Takes about 2 minutes
The tools
- Quarterly Tax Estimator
What to pay the IRS each quarter, with the safe-harbor check most calculators skip.
- Self-Employment Tax Calculator
Your Social Security + Medicare bill, itemized.
- Invoice Generator
Clean invoices in a minute. No watermark, no signup, no upsell.
- Estimate Generator
Professional estimates that turn into invoices.
(list grows as tools ship)
Built on this year's numbers
Most free tax calculators run on last year's brackets and skip the QBI deduction, which means they quietly overestimate what you owe. Solvent's math uses 2026 figures verified against IRS Rev. Proc. 2025-32 and the SSA wage base, includes the 20% QBI deduction, and shows you the safe-harbor method side-by-side so you can pay the smaller legal amount. Every calculator shows its work.