How to Calculate Your Mortgage Payment
Start with the home price and subtract your down payment to find the amount you need to finance. The calculator then uses that loan amount, your selected term and the interest rate you enter to estimate the monthly principal-and-interest payment. You can add property taxes, homeowners insurance, PMI and HOA dues when you want a broader estimate of monthly housing costs.
For a useful comparison, change one input at a time. Try a larger down payment, a different home price or another interest rate and watch how the monthly estimate changes. This makes it easier to see which assumptions have the greatest effect on the payment before you speak with a lender.
What Is Included in a Monthly Mortgage Payment?
The required loan payment starts with principal and interest. Principal is the portion that reduces the balance you owe, while interest is the cost of borrowing. Many homeowners also pay property taxes and homeowners insurance through an escrow account, so those costs can appear on the same monthly statement.
Principal
The amount of each payment that reduces your outstanding loan balance.
Interest
The lender's charge for financing the mortgage balance.
Taxes & insurance
Property taxes and homeowners insurance may be collected through escrow.
PMI & HOA
PMI may apply to some lower-down-payment loans; HOA dues depend on the property.
How Mortgage Rates Affect Your Payment
The interest rate can materially change both your monthly payment and your long-term borrowing cost. On the same loan amount, a lower rate generally means a lower principal-and-interest payment and less interest paid over the life of the mortgage. That is why the rate entered in a calculator should be treated as a scenario, not a guaranteed quote.
When you compare lender offers, look beyond the advertised rate. Review the APR, points, lender fees and estimated payment as well. A lower rate can sometimes require higher upfront costs, so the right offer depends on both the monthly payment and how long you expect to keep the loan.
How Your Down Payment Changes the Mortgage
Your down payment directly changes the amount you finance. For example, putting $95,000 down on a $475,000 home leaves a $380,000 starting loan balance. Increasing the down payment reduces the amount borrowed and generally lowers the monthly principal-and- interest payment.
Down payment size can also affect mortgage insurance and the loan programs available to you. A 20% down payment is a useful reference point for conventional financing because some borrowers can avoid PMI at that level, but actual requirements vary by loan and lender.
Mortgage Payment Example
Home price
$475,000
Down payment
$95,000 (20%)
Loan amount
$380,000
Loan term
30 years
Entering those values with a chosen interest rate produces an estimated principal-and-interest payment. Adding taxes, insurance and other housing costs gives a broader budgeting estimate. The result is useful for testing scenarios, but a lender's actual quote will depend on current market rates, credit, property details, loan program, points and fees.
Mortgage Payment Calculator FAQs
How is a monthly mortgage payment calculated?
The principal-and-interest portion is calculated from the amount borrowed, the mortgage interest rate and the loan term. Property taxes, homeowners insurance, private mortgage insurance and HOA dues can then be added to estimate a broader monthly housing payment.
What is included in a mortgage payment?
A mortgage payment commonly includes principal and interest. If your lender uses an escrow account, property taxes and homeowners insurance may also be collected with the monthly payment. PMI can apply to some loans with smaller down payments, while HOA dues are separate property costs that may also affect your monthly budget.
How does the interest rate affect my monthly payment?
With the same loan amount and term, a higher interest rate generally increases the monthly principal-and-interest payment and the total interest paid over the life of the loan. Even relatively small rate differences can matter on a large mortgage balance.
How does a larger down payment change the payment?
A larger down payment reduces the amount you need to borrow, which generally lowers the principal-and-interest payment. Reaching 20% down may also eliminate the need for private mortgage insurance on some conventional loans.
Is this mortgage payment an exact lender quote?
No. The calculator provides an estimate for planning and comparison. Actual rates, APRs, fees, taxes, insurance, PMI, closing costs and loan eligibility vary by lender, property and borrower qualifications.
Should I compare APR or the mortgage interest rate?
The interest rate is used to calculate interest on the loan, while APR is designed to reflect the rate plus certain loan costs and fees. When comparing mortgage offers, review both along with points, lender fees and the estimated payment.
Continue exploring mortgage costs
For a more detailed loan analysis, use the full mortgage calculator to review additional payment details and amortization information.