Spreadsheets are great until they are not. Manually re-entering tax brackets, the SE tax wage base, and the Additional Medicare threshold every January is exactly the kind of busywork that leads to mistakes — usually expensive ones. FreelanceMath calculators do the math for you, get updated when the IRS publishes new numbers, and run instantly in the browser with no data sent to a server.
This page indexes every calculator in the library. Each tool is purpose-built for one job, so you can grab the right one for the question you actually have instead of digging through a generic "tax calculator" that does ten things badly.
What's available right now
The Self-Employment Tax Calculator handles the 15.3% SE tax in isolation — useful when you already know your federal/state situation and just need the SE number. The 1099 Tax Calculator layers federal, state, and SE tax for a full take-home estimate across all 50 states and all four filing statuses, with deductions and the QBI break baked in. The Freelance Rate Calculator works backwards from a target take-home to the hourly rate you need to charge, including SE tax, 2026 federal brackets, and a full dollar-by-dollar breakdown. The Quarterly Tax Estimator splits your annual tax liability into the four IRS due-date payments and shows the safe-harbor minimum. The Free Invoice Generator lets you create professional freelance invoice PDFs in your browser — no signup, no watermark, no data sent to a server.
How the calculators work
Every tool runs entirely client-side — your numbers never leave the browser. Results update live as you type (with a tiny debounce to keep things smooth). The underlying calculation logic is separated from the UI in pure TypeScript modules, unit-tested against published IRS tables. When the IRS releases new brackets or wage bases, we update one constants file and every tool stays in sync.
What's next on the roadmap
Several tools are in the pipeline: a Profit Margin Calculator for project- and client-level profitability, a Retirement Contribution Calculator for SEP-IRA and Solo 401(k) limits, and additional state-specific tax tools. Cards on this page show "Coming soon" badges for tools in progress.
Why we built these
Most online tax calculators are either gated behind an email signup, lock results behind a paywall, or quietly route to a paid tax-prep product. FreelanceMath calculators are free, open, and built specifically for the people the W-2 tools forget about: 1099 contractors, freelancers, side-hustlers, single-member LLCs, and solo founders. If a calculator you need is missing, it is probably already in the queue — and the existing ones will keep getting more accurate as we layer in features like progressive state brackets, multi-state allocations, and combined W-2 + 1099 scenarios.
If you are not sure which calculator to start with, the 1099 Tax Calculator is the most comprehensive — it answers the "how much will I actually owe" question for the broadest range of freelance situations.