Quarterly1099 is a free tax estimator for self-employed Americans — freelancers, independent contractors, gig workers, and small business owners who file 1099 income. The goal is simple: a fast, accurate-enough estimate of what you owe federally, in your state, and per quarter — without forms, accounts, or sales pitches.
The calculator uses the 2025 federal tax brackets (applied to the tax year filed in 2026), the 2025 standard deduction, the 2025 Social Security wage base, and a simplified state effective rate per state. Self-employment tax follows IRS Schedule SE rules: 15.3% on 92.35% of net SE earnings, with the Social Security portion capped at the wage base. The 20% Qualified Business Income (QBI) deduction is applied when toggled on.
State tax is a single effective rate by state. Several states are progressive (CA, NY) so the result is an approximation. State pages link to detailed brackets.
This site does not collect any personal data. The calculator runs entirely in your browser. We do not store, send, or log any of the numbers you enter.
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This site provides estimates only. It is not tax advice. Tax law changes; brackets, rates, and rules described here are based on the 2025 tax year (filed in 2026) and are subject to change. For decisions affecting your finances, consult a CPA, enrolled agent, or qualified tax professional.
Questions, corrections, or state requests: hello@quarterly1099.com