MathBench

Finance Calculators

Money decisions deserve arithmetic you can inspect. These calculators run the same amortization, closing-statement, and payroll-tax math your lender, title company, and accountant use: month-by-month loan simulations, the current year's Social Security wage base rather than a stale one, and every assumption printed on the page. What they are not is advice: each tool produces educational estimates, states what it ignores, and says so plainly at the top of the page.

The mortgage set answers the questions buyers and owners ask: what a home costs per month once taxes, insurance, and PMI join the payment, what an extra $200 a month saves, what biweekly payments do, what the HELOC payment becomes when the interest-only decade ends, and what a sale nets after everyone at the closing table is paid. The tax pair covers the two moments self-directed money meets the IRS: an early retirement withdrawal, with its stacked penalty and taxes, and self-employment income, with its quarterly set-aside. Use the numbers to frame better questions for a professional who knows your situation. That's what estimates are for.