Quarterly Estimated Tax Calculator 2026

This calculator estimates federal quarterly tax payments for self-employed people, freelancers, independent contractors, and LLC owners. It starts with your estimated annual income, subtracts estimated deductions, applies 2026 federal tax brackets, then adds self-employment tax.

Self-employment tax is estimated at 15.3% of 92.35% of net self-employment income. This represents Social Security and Medicare tax for people who work for themselves. The calculator then subtracts income already withheld from W-2 work or other sources and divides the remaining amount by four.

This is a planning estimate. Your final tax can change based on retirement contributions, qualified business income deductions, state income taxes, capital gains, dependents, itemized deductions, additional Medicare tax, and other credits.