Principal vs interest
Lifetime mortgage repayment
Principal$0
Interest$0
United States · USD
See What Goes into Your Monthly Mortgage Payment
Estimate your full payment using American loan programs, costs, and payment conventions.
Plan for rising housing expenses
Estimate taxes, homeowners insurance and HOA costs over a chosen period. These costs can continue after the mortgage is paid off. This projection is separate from loan repayment totals.
Projected housing expenses
Future monthly expenses
Year 1 uses the amounts entered above; increases apply at each year anniversary. Excludes loan payments, mortgage insurance, repairs, utilities and closing costs.
Balance over time
How your remaining principal declines
Amortization schedule
Loan principal and interest, including extra principal payments
Weekly and two-week dates use evenly spaced annual periods, not a lender calendar. CSV exports the selected view in dollars to two decimal places.
| Year | Principal | Interest | Extra payments | Total paid | Ending balance |
|---|
Compare deposit and mortgage term
See how monthly payments and total interest change across different deposits and terms.
| Deposit | 15 years | 20 years | 25 years | 30 years |
|---|---|---|---|---|
| 10% | $3,528per month$230,037 interest | $3,020per month$319,697 interest | $2,735per month$415,377 interest | $2,560per month$516,555 interest |
| 15% | $3,332per month$217,257 interest | $2,852per month$301,936 interest | $2,583per month$392,300 interest | $2,418per month$487,858 interest |
| 20% | $3,136per month$204,478 interest | $2,684per month$284,175 interest | $2,431per month$369,224 interest | $2,275per month$459,160 interest |
| 25% | $2,940per month$191,698 interest | $2,516per month$266,414 interest | $2,279per month$346,147 interest | $2,133per month$430,463 interest |
6.50% interest rate · $450,000 property price
Interest-rate stress test
See how your payment and total interest could change if the mortgage rate rises.
0%+2.5%+5%
Stressed rate8.50%
Stressed monthly payment$2,768
Monthly difference+$493
Additional total interest+$177,352
This scenario holds the stressed rate constant for comparison. Actual variable, renewal, and lender rates may differ.
Save with extra payments
Add a monthly or yearly amount and see how much you could save over the full mortgage.
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Total interest saved$0
Time savedNo change
New payoff date—
Balance comparison
Standard paymentsWith extra payments
U.S. planning estimate only. Program insurance rates are simplified defaults, not eligibility or lending advice. Property taxes and insurance vary by location. Closing costs, loan limits, upfront fees and lender charges are not included.
U.S. mortgage payment guide
Understand your estimated mortgage payment
The calculator provides an educational estimate of the recurring cost of a U.S. home loan. It combines principal and interest with entered property tax, homeowners insurance, HOA dues and either manual or automatically estimated mortgage insurance. It follows the selected payment frequency and displays the amount borrowed, estimated lifetime interest, total repayment and payoff time.
The breakdown beside the calculator shows how each part contributes to the monthly total. These results are planning estimates, not a mortgage offer, approval, Loan Estimate or Closing Disclosure.
How to use the U.S. mortgage calculator
- Choose a mortgage program. Select conventional, FHA, VA or USDA to view a simplified recurring mortgage‑insurance estimate when automatic mode is enabled. Upfront program fees are not included.
- Enter the home price and down payment. Adjust the down payment in dollars or as a percentage of the price.
- Select the term and enter the rate. Use the annual fixed interest rate you want to test. The calculator assumes that rate continues for the full term.
- Add recurring housing costs. Enter annual property tax, annual homeowners insurance and monthly HOA dues.
- Review the full result. Compare principal‑and‑interest with the total that includes additional costs.
- Test alternatives. Compare down payments and terms, raise the rate in the stress test or add extra payments to see how the outcome changes.
Replace default values with property‑specific figures whenever possible. Tax rates, insurance premiums, HOA dues and program costs vary by location and borrower.
What the monthly payment includes
A mortgage payment is often described as PITI: principal, interest, taxes and insurance. Depending on the property and mortgage program, additional charges may apply.
Principal
The portion of the payment that reduces the outstanding mortgage balance.
Interest
The cost charged by the lender for borrowing the mortgage principal.
Property taxes
Local taxes based on assessed value. The annual amount is spread across the selected payment frequency.
Homeowners insurance
Coverage for the home and certain losses. The annual premium is divided across payment periods.
Mortgage insurance
PMI or program‑specific insurance may apply depending on the down payment, loan program and lender.
HOA dues
Association charges that form part of the housing budget but do not reduce the mortgage balance.
Closing costs, prepaid items, maintenance, repairs and utilities are not included in the monthly estimate.
Mortgage payment formula
The calculator uses the standard fixed‑rate amortization formula to estimate principal and interest:
M = P × [r(1 + r)n] ÷ [(1 + r)n − 1]
- M is the periodic principal‑and‑interest payment.
- P is the starting loan principal after the down payment; upfront program fees are excluded.
- r is the interest rate for each payment period.
- n is the total number of scheduled payments.
Property taxes, homeowners insurance, HOA dues and mortgage insurance are calculated separately and added to the principal‑and‑interest payment. They do not reduce the loan balance.
Worked mortgage example
For a $450,000 home with a $90,000 down payment and a $360,000 loan at 6.5% for 30 years, the estimated principal‑and‑interest payment is about $2,275 per month. With $5,400 annual property tax, $1,800 annual homeowners insurance and $150 monthly HOA dues, the broader monthly estimate is approximately $3,025.
This example assumes no mortgage insurance. Actual lender calculations may differ due to payment dates, rate precision, escrow adjustments, fees and rounding.
How to read the amortization schedule
Amortization is the gradual repayment of a loan through scheduled payments. Early payments usually contain more interest; later payments apply more toward principal.
You can view an annual summary or every payment. Each row shows scheduled principal, interest, extra principal and remaining balance. Extra payments reduce principal sooner and may shorten the payoff period. Confirm with your servicer how extra payments are applied.
Comparing mortgage terms and down payments
A shorter term usually produces a higher monthly payment but less total interest. A longer term generally lowers the required payment while increasing lifetime interest.
A larger down payment reduces the amount borrowed and may reduce or remove mortgage insurance on some conventional loans. Keep enough cash for closing costs, moving expenses, repairs and an emergency reserve.
The story behind America's 30-year fixed-rate mortgage
The 30‑year fixed‑rate mortgage offers a constant scheduled principal‑and‑interest payment over 360 months. The balance gradually falls even though the payment stays the same.
From short loans to a lasting commitment
Early‑twentieth‑century mortgages were shorter, required larger down payments and often ended with balloon payments. The FHA (1934) and Fannie Mae (1938) helped establish longer fixed‑rate mortgages.
Predictability has a price
Spreading repayment over 30 years lowers the required monthly payment but increases total interest. A 15‑year mortgage requires a higher payment but pays off sooner.
Why a good rate can make moving harder
Fixed rates protect existing borrowers when market rates rise, but may discourage moving if new financing would require a higher rate. Economists call this mortgage lock‑in.
What stays fixed in your budget?
The fixed rate applies to principal and interest, not to taxes or insurance. Escrow payments can rise even when principal and interest stay unchanged.
Conventional, FHA, VA and USDA estimates
The program selector provides simplified planning estimates for several common U.S. mortgage types. These programs have different eligibility rules and different treatment of mortgage insurance, guarantee fees and funding fees. The calculator uses simplified defaults and cannot determine eligibility or reproduce every lender‑specific charge.
Payment estimate versus affordability
The calculator estimates what a selected mortgage scenario may cost. It does not determine comfort level or approval. Income, debts, credit history, reserves and underwriting all affect affordability and qualification.
Compare a payment, a payoff plan and a housing budget
Compare the same home across different terms and down payments. Extra payments reduce the loan balance; taxes, insurance and HOA do not.
Inspect every payment or the annual summary, export the schedule or share a link to your assumptions. Rising housing expenses are projected separately and do not change amortization.
Sources and important limitations
The calculator is intended for education and planning. It assumes a constant interest rate and simplified program assumptions. It does not account for every loan limit, discount point, lender credit, closing cost, prepaid item, escrow adjustment, tax rule or eligibility requirement.
Payment frequency and insurance assumptions
Every‑two‑week mode calculates 26 equal scheduled payments per year. Weekly and two‑week dates are approximate; the first‑payment month sets the timeline.
Automatic mortgage‑insurance estimates provide a starting charge. The tool does not schedule PMI cancellation, FHA premium changes or upfront program fees. A first‑mortgage LTV reaching 80% does not switch charges off.
Extra payments and rising housing expenses
Monthly extras follow the selected payment frequency. Annual extras apply at the end of each loan year, and lump sums apply after the selected number of years. Rising housing‑expense projections affect taxes, insurance and HOA from year two but do not change amortization.
Mortgage calculator FAQ
What does the headline mortgage payment include?
It combines principal and interest with entered property taxes, home insurance, HOA dues and mortgage insurance, scaled to the selected payment frequency. It excludes closing costs, utilities, repairs and voluntary extra principal.
Does the calculator use the note rate or APR?
Enter the annual note rate for the payment calculation. APR includes additional financing costs and is a separate comparison measure. The entered rate stays constant throughout this simulation.
Does automatic mortgage insurance stop when I reach 80% LTV?
No. Automatic mode estimates a starting premium from simplified program assumptions. It does not model PMI cancellation or the full duration of program insurance charges. Confirm those details with the lender or servicer.
Are every-two-week payments an accelerated biweekly plan?
No. The tool recalculates a payment for 26 periods per year. It does not automatically charge half the monthly payment every two weeks, which would produce the equivalent of 13 monthly payments annually.
How do extra principal payments affect the results?
They reduce the modelled balance while the ordinary payment stays unchanged, potentially saving interest and shortening repayment. They appear in the schedule rather than the headline housing payment. No prepayment charge is included.