estimatetax
Tools

Every tax calculator you need for 2026

Each one runs entirely in your browser, cites the IRS document its numbers come from, and says plainly what it does not cover.

Available now
In build

These are next. We publish a calculator when its numbers have been checked against the source, not before — which is why this list is a list and not eight empty pages.

Tax Withholding EstimatorWhether your W-4 is right, and the exact lines to change.
Self-Employment Tax CalculatorSE tax, QBI and quarterly payments on 1099 income.
Capital Gains Tax CalculatorShort vs long term, NIIT and state.
Retirement Tax Calculator401(k), IRA and Social Security in retirement.
Rental Income Tax CalculatorDepreciation, passive loss limits and the state side.
Small Business Tax CalculatorPass-through income, QBI and estimated payments.