CalcOS

CalcOS calculator

Monthly Mortgage Payment Calculator

Calculate standard monthly payments, model rent-vs-buy scenarios, analyze refinancing benefits, or determine home affordability.

Enter your details

Taxes, insurance and other details
Updating answer…

How this calculator works

Planning to buy a home? Use our free mortgage payment calculator to estimate your total monthly housing costs. Simply input the home purchase price, down payment, annual interest rate, and loan term to calculate your principal and interest payments. Our tool also factors in property taxes and homeowners insurance to give you an accurate picture of your real monthly budget.

Method
Standard Loan Amortization Formula
Source
Consumer Financial Protection Bureau — How mortgage lenders calculate monthly payments; Principal and interest versus total monthly payment
Last reviewed
2026-08-22
Method limitations
  • Requires inputs to be within standard physical and mathematical boundaries.

Engine-backed example

Monthly mortgage payment: worked example

What is the estimated monthly payment on a $475,000 home with 20% down, a 6.25% rate, and a 30-year mortgage?

Home price and down payment
$475,000 and $95,000
Interest rate and term
6.25% for 30 years
Annual tax and insurance
$5,760 and $1,680
Est. Monthly Payment$2,959.73
Principal & Interest
$2,339.73
Monthly Property Tax
$480.00
Monthly Insurance
$140.00

The estimate combines principal and interest with the supplied monthly property-tax and insurance assumptions. It is not a lender quote or approval.

Trust and review

Who created and reviewed this calculator?

Author
CalcOS Editorial TeamResponsible for calculator explanations, examples, assumptions, and search-intent clarity.
Reviewed by
CalcOS Scientific ReviewTechnical review of fixed-payment amortization, input boundaries, units, component totals, engine parity, and narrative examples; not licensed financial advice.
Substantive review date
2026-08-22Standard mortgage payment mode, principal-and-interest calculation, supplied tax and insurance components, boundaries, worked-example parity, and estimate limitations.

Sources

Assumptions used by this calculator
  • Standard pilot mode uses the supplied loan amount, interest rate, and term.
  • Property tax, homeowners insurance, and HOA amounts are user-supplied estimates.
  • Actual lender calculations, escrow, fees, insurance, eligibility, and rate terms can differ.
  • The result is educational planning information, not approval, a lender quote, or financial advice.

Continue this calculation

Useful next steps