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. Everything runs in your browser - no login, no tracking, your numbers never leave your device.
Loan over time
Remaining loan balance by year. The gold line marks 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. It automatically ends once you reach about 20-22% equity - the "Loan over time" card shows when.
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 saved or sent anywhere.
If it saved you time, you can drop a coffee on Ko-fi. Optional - the tool stays free either way.