PaymentMath

Mortgage & money · free, no sign-up

Loan and savings math, shown plainly

Quick answer: A mortgage payment is principal and interest plus property tax, homeowners insurance and any PMI or HOA dues (PITI). Example: borrowing $320,000 at 6.5% for 30 years costs $2,022.62 a month in principal and interest. PaymentMath also works out car loans, debt payoff and savings goals, with the formula shown.

Start with a mortgage estimate:

Freddie Mac average, week of Oct 22, 2026:

Loan term
Taxes, insurance, PMI and HOA · 0.94% tax, $1,569/yr insurance included
Extra payments and start date · see interest saved

Where do these numbers come from?

Checked Oct 23, 2026. $320,000 borrowed at 6.5% for 30 years: this calculator gives $2,022.62 a month in principal and interest, and =PMT(6.5%/12; 360; -320000) in LibreOffice Calc (the same PMT function as Excel and Google Sheets) returns 2,022.62. At this week's Freddie Mac average of 7.32% both give $2,198.18.

How we calculateCorrectionsChangelogAbout PaymentMath

Calculators

Popular

What PaymentMath does

PaymentMath gives straight answers to money questions: what a mortgage really costs each month including property tax, insurance, PMI and HOA dues; how much interest an extra payment saves; what a car or personal loan will cost in total; and how savings grow. Every result shows the formula used and works in your browser, so no numbers are sent anywhere.

Where the numbers come from

Payments use the standard amortization formula. Property tax estimates use U.S. Census Bureau American Community Survey data by state and ZIP code, and home insurance defaults use NAIC and Insurance Information Institute averages. Rates you enter are yours; PaymentMath never shows a rate as a quote or offer. See the editorial policy for how pages are checked.

Start here