Finance

Convert a US gross salary to federal take-home pay: Social Security, Medicare and the 2026 income-tax brackets by filing status, monthly and annual.

Estimate the monthly payment, total interest and full amortization schedule of a US fixed-rate mortgage or loan, from the amount, term and rate.

Project how a deposit plus monthly contributions grow at a chosen annual return, with a year-by-year compound interest chart.

Add US sales tax to a price by state: the exact state rate and an estimated combined state-plus-local rate, for all 50 states and DC.

See how a starting balance and regular contributions grow through compound interest at your chosen return and compounding frequency, and how much is interest.

Work out the nest egg you need for financial independence using the 25x rule (a 4% withdrawal rate) and how many years it takes at your savings rate.

Social Security calculator for 2026: full retirement age, benefit at 62 to 70 from your SSA Statement, or a projection with the PIA formula.

Work out how many units you must sell — and the sales revenue needed — to cover fixed and variable costs, from your price and contribution margin per unit.

Compare an S-corp salary with C-corp dividends: take-home pay and the true cost to your company for the same gross amount, on 2026 federal tax rates.

Work out US federal estate tax with the $15,000,000 exemption, portability and lifetime gifts, and check whether this year's gifts need Form 709.