Payoff Logic

Financial calculators that show you the whole picture

Payoff Logic builds free, no-signup calculators for the money decisions that matter most — your mortgage, your loans, and your debt payoff plan. Every tool includes the full math: amortization schedules, taxes and insurance, and shareable, printable results.

  • 100% free, no account needed
  • Nothing you enter leaves your browser
  • Full amortization tables included

All calculators

All five launch tools are live — each built to show the complete math, verified against published reference examples.

Mortgage

Explore by state (all 50, local tax & insurance preloaded) or by loan amount ($100k–$2M payment tables).

  • Mortgage Calculator

    Estimate your full monthly payment — principal, interest, property taxes, insurance, PMI, and HOA — with a complete amortization schedule.

    Open calculator →

  • Home Affordability Calculator

    How much house can you afford? Income, debts, and the 28/36 rule turned into a real price range.

    Open calculator →

  • Extra Payment Mortgage Calculator

    What paying more each month (or one lump sum) does to your mortgage payoff date and interest.

    Open calculator →

  • Biweekly Mortgage Calculator

    Half your payment every two weeks equals 13 payments a year — see the years and interest it removes.

    Open calculator →

  • 15-Year Mortgage Calculator

    15 vs. 30 years side by side: payment difference, interest difference, and equity build.

    Open calculator →

  • FHA Loan Calculator

    FHA payment with both MIP charges included — upfront 1.75% and the annual premium, with the 11-year rule.

    Open calculator →

  • VA Loan Calculator

    VA payment with the correct funding fee for your down payment and usage — and no PMI.

    Open calculator →

  • Mortgage Payoff Calculator

    Pay off your existing mortgage early: extra monthly payments, lump sums, and your new payoff date.

    Open calculator →

  • Down Payment Calculator

    Every tier from 3.5% to 20% compared: cash needed, payment, PMI — and what your savings cover.

    Open calculator →

  • PMI Calculator

    Your monthly PMI, the exact month it cancels at 78% LTV, and how extra payments remove it sooner.

    Open calculator →

  • Mortgage Points Calculator

    Price the rate buy-down: points cost, monthly savings, break-even month, lifetime value.

    Open calculator →

  • Rent vs. Buy Calculator

    Year-by-year net cost of each path — equity, appreciation, and transaction costs included — with your crossover year.

    Open calculator →

Debt Payoff

  • Loan Payoff Calculator

    See how extra payments shorten your loan and how much interest you save.

    Open calculator →

  • Credit Card Payoff Calculator

    How long your payment takes — or the payment that hits your target date — with a +$50/+$100 ladder.

    Open calculator →

  • Debt Consolidation Calculator

    Your debts vs. a real loan offer at the same monthly budget — fees counted, longer-term tricks exposed.

    Open calculator →

  • Personal Loan Calculator

    Payment, total interest, and full schedule for any personal loan — plus early-payoff savings.

    Open calculator →

  • Student Loan Payoff Calculator

    Fixed-plan student loan math with extra-payment savings — and when NOT to prepay (IDR/forgiveness).

    Open calculator →

  • Debt Snowball Calculator

    Compare the snowball and avalanche payoff methods side by side across all your debts.

    Open calculator →

Refinance

Auto

  • Auto Loan Calculator

    Estimate car payments including trade-in value and state sales tax.

    Open calculator →

  • Car Affordability Calculator

    Turn a monthly budget into a maximum sticker price — tax-aware, with down payment and trade-in.

    Open calculator →

  • Auto Refinance Calculator

    Check the refi math on your car loan in 30 seconds — fees included, longer-term trap flagged.

    Open calculator →

Why another calculator site?

Complete math, not teasers

Most calculators stop at a single monthly number. Ours break down principal, interest, taxes, insurance, PMI, and HOA — and show the full payoff schedule.

Private by design

Calculations run entirely in your browser. We never see, store, or sell the numbers you enter.

Sourced & transparent

Where we use reference data — like state property-tax rates — we cite the source so you can verify it yourself.

Educational purposes only — not financial advice. See our Terms of Use.