Home Affordability Calculator
Estimate your real monthly payment, debt-to-income ratios, closing costs, when PMI drops off, and how extra payments shorten the loan. Runs in your browser - no login, no tracking, your numbers never leave your device.
Loan over time
Remaining loan balance by year. The dashed marker shows when PMI can drop off (20% equity).
Estimated closing costs
Prepaid escrow is usually the biggest chunk and the one people forget. Transfer tax varies by state and is often seller-paid, so it is not included here.
Cash & loan summary
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Estimates only - confirm tax, insurance, PMI, and closing costs against your lender's Loan Estimate. Not financial advice.
PMI - Private Mortgage Insurance
Required when your down payment is under 20%. It protects the lender, not you. At 20% equity you can request cancellation - that is the marker on the "Loan over time" card. At 22% equity your servicer must drop it automatically.
Prepaid escrow
Money collected at closing to fund the lender's escrow account - usually your first year of homeowners insurance plus a few months of property tax. Often the single largest closing line item.
Debt-to-income (DTI)
Front-end = housing payment / gross income. Back-end = (housing + all other debt) / gross income. Lenders generally want front-end under 28% and back-end under 36%, with a hard ceiling near 43%.
Amortization
How each payment splits between interest and principal. Early on most of the payment is interest; over time it flips. Extra principal early erases future interest - which is why even small extra payments cut years off the loan.
This calculator is free and private - it runs entirely in your browser, and nothing you enter is sent anywhere. Your numbers are saved in this browser only, so the page opens where you left off. "Reset my defaults" clears them and starts over.
If it saved you time, you can drop a coffee on Ko-fi. Optional - the tool stays free either way.