TaxQuarterly

TaxQuarterly helps US freelancers, contractors and 1099 workers figure out what to pay the IRS each quarter. Enter your expected profit and other income to get federal income tax plus self-employment tax, a set-aside percentage for every invoice, your safe-harbor amount to avoid underpayment penalties, and a 1040-ES schedule with due dates (next: January 15, 2027). The calculator is free and runs in your browser with no account. Pro ($6/month or $49/year) adds saved payment history, calendar reminders before each deadline, state estimates for 11 states and a PDF summary. 30-day refund. Estimates only, not tax advice.