Estimated Quarterly Tax Calculator

Estimate quarterly federal and state payments for self-employment or untaxed income.

Tax year

Filing status

Expected self-employment profit

Other taxable income

Expected federal withholding

Federal credits

Prior-year total tax

State effective tax rate

Quarterly payment estimate

$4,687

Federal + simple state estimate

Annual amount to cover

$18,748

$17,258 federal before withholding

Self-employment tax

$9,043

Income tax after credits

$8,215

Simple state estimate

$3,690

Federal safe-harbor target

$9,200

Uses annualized 2026 federal tax plus SE tax and a flat state estimate. Safe-harbor display uses 100% of prior-year tax, or 110% when AGI is above $150,000 ($75,000 MFS).