Mortgage / Home Loan Calculator

A mortgage payment is more than principal and interest. The Mortgage / Home Loan Calculator adds taxes, insurance and PMI to show your true monthly outlay (PITI), the total interest over the life of the loan, and the all-in cost of owning. Add an extra monthly payment to see how much faster you could be free of the loan.

• Full PITI: Principal, interest, tax, insurance and PMI in one payment.
• Total cost: Lifetime interest and all-in cost at the entered rate.
• Extra payments: See interest saved and years cut.
• Down-payment sensitivity: PMI appears automatically under 20% down.
• Clear summary: Monthly breakdown and totals at a glance.
• Export: CSV, JSON or plain text of the full model.

1. Price & down: Home price and down-payment amount.
2. Loan: Interest rate and term in years.
3. Housing costs: Annual tax, insurance and HOA.
4. PMI: Entered if under 20% down (or estimate).
5. Extra: Optional extra principal per month.
6. Review & export.

Example 1 — 20% down. $400k at 6.5% / 30y, $5k tax, $1.2k insurance: PITI around $2,600/mo.

Example 2 — 5% down. Same home with PMI: payment rises and total interest grows.

Example 3 — Extra $200. Adding $200/mo can cut years and tens of thousands in interest.

Example 4 — 15-year. Same balance at 6% / 15y nearly halves total interest.

Example 5 — HOA. Adding $350 HOA lifts the monthly nut but not the loan itself.

• True payment: No more surprise that PITI exceeds P&I.
• Interest reality: See the real lifetime cost of the rate.
• Payoff power: Quantify extra-payment benefits instantly.
• Plan the buffer: Know the monthly commitment before you commit.
• Private: No account, no upload, nothing stored.