Clear numbers for money decisions.
Model debt payoff, home costs, savings, and retirement without creating an account. Change an input and see the estimate update immediately.
Calculations run on this device. Share links keep inputs after the #, outside normal server requests.
Choose by the decision you’re making
Each tool shows its assumptions, a worked example, and the formula behind the result.
Pay down debt
Compare payment plans and see the true cost of interest.
Plan a home
Estimate affordability, monthly payments, and prepayment savings.
Build savings
Turn a goal, contribution, or time horizon into a clearer plan.
Know where you stand
Get a useful snapshot of cash flow and net worth.
Estimates you can inspect
PayoffCalcs is built by a developer, not a financial adviser. The site documents its formulas, cites outside data where it is used, and states where real-world fees or lender rules can change the result.
Recently published guides
Plain-language explanations that connect the calculators to common decisions.
Pay Off the Mortgage Early or Invest?
The real math behind prepaying your mortgage vs investing. Guaranteed return vs market returns, after-tax calculations, and the break-even rate that decides it for your situation.
Debt Snowball vs Avalanche: Which Saves More?
Debt snowball vs avalanche: which saves more money? Compare interest costs, payoff timelines, and completion rates for both strategies with real examples.
Complete Debt Payoff Roadmap: Assessment to Freedom
A complete debt payoff roadmap from assessment to freedom. Calculate your total debt, choose avalanche or snowball, set up automated payments, and track your progress.