Calculate your mortgage payment
Enter your estimated home price, down payment, rate, and loan term. Then add expected taxes, insurance, and HOA fees for a more realistic monthly housing cost.
This calculator uses a standard fixed-rate amortization formula. Taxes and insurance are estimated as monthly amounts using annual cost ÷ 12. PMI, mortgage insurance, closing costs, discount points, and lender fees are not included.
Looking for a general loan calculation without housing costs? Try the loan payment calculator.
How this mortgage calculator works
Most home loans are amortizing mortgages. That means each monthly payment is designed so the balance reaches zero by the end of the loan term. The payment is based on three core variables: your loan amount, interest rate, and repayment period.
In practice, homeowners usually care about more than the base loan payment. That is why this calculator shows both:
- Principal and interest (P&I) — the loan payment only
- Total monthly payment — P&I plus estimated property taxes, insurance, and HOA fees
This gives a more realistic view of your likely monthly housing cost, especially when you are deciding whether a home price actually fits your budget.
What your mortgage results mean
Monthly payment (P&I)
This is the core loan payment. It includes only the portion that goes toward repaying the balance and the interest charged by the lender. It is useful for comparing mortgage structures, but it is not the whole housing picture.
Total monthly payment
This adds estimated property taxes, homeowner’s insurance, and HOA fees. For many households, this number is closer to what actually leaves the bank account each month than the P&I figure alone.
Total paid over term
This estimate shows how large the long-term commitment can become when monthly costs continue for many years. It includes the recurring monthly housing components entered in the calculator.
Total interest
This is one of the most useful comparison metrics. It shows how much interest is paid over the full life of the mortgage on the loan portion alone. Even small changes in interest rate can have a large effect over 15 to 30 years.
Mortgage formula used by the calculator
For a fixed-rate mortgage, the standard monthly payment formula is:
M = P × [ r(1 + r)^n ] ÷ [ (1 + r)^n − 1 ]
Where:
M = monthly principal and interest payment
P = loan principal
r = monthly interest rate
n = total number of monthly payments
In this tool, the monthly interest rate is the annual rate divided by 12, and the total number of payments is the loan term in years multiplied by 12.
Example: interpreting a common mortgage scenario
Suppose you are considering a $350,000 home with a $70,000 down payment, a 5% interest rate, and a 30-year term. Your loan amount is $280,000.
- If you increase the down payment, the loan amount falls, which usually lowers both monthly payment and total interest.
- If you reduce the rate, the impact may seem small monthly but can be significant across hundreds of payments.
- If you shorten the term, your monthly payment usually rises, but your total interest often drops materially.
- If property taxes and insurance are higher than expected, your true monthly cost may rise faster than you planned.
How to think about affordability
A mortgage can be technically approvable and still feel uncomfortable in everyday life. The safer question is not only “Can I qualify?” but also “Will this payment still feel manageable after normal life expenses, maintenance, and financial surprises?”
Before committing, it is worth checking:
- Whether the total monthly payment still works after utilities, repairs, and maintenance
- Whether you can keep an emergency fund after making the down payment
- Whether a slightly higher tax or insurance estimate still fits your budget
- Whether you are comfortable with the trade-off between a lower monthly payment and higher lifetime interest
Ways to lower your mortgage payment
- Increase the down payment. This reduces the amount borrowed and may lower other loan-related costs.
- Shop for a better rate. Even modest rate improvements can matter over the full term.
- Choose a less expensive home. This lowers multiple housing cost components at once.
- Review tax and insurance assumptions. A home in a lower-cost area may be more affordable even at a similar purchase price.
- Compare terms carefully. A 15-year mortgage may save interest, but only if the higher payment fits your broader plan.
What this calculator does not include
This tool is meant to provide a practical estimate, not a lender quote. It does not include:
- Private mortgage insurance (PMI)
- Closing costs
- Discount points
- Maintenance and repair costs
- Utilities
- Variable-rate adjustments for ARMs
- Lender-specific underwriting or escrow policies
That makes it useful for planning and comparison, but final loan disclosures can differ.
Mortgage calculator FAQ
What does a mortgage payment include?
At minimum, principal and interest. Many borrowers also pay property taxes and homeowner’s insurance monthly through escrow, and some properties include HOA fees as well.
What is the difference between P&I and total monthly payment?
P&I is principal and interest only. Total monthly payment adds estimated taxes, insurance, and HOA fees to show a more realistic monthly housing cost.
Does this mortgage calculator include PMI?
No. PMI or other mortgage insurance is not included. If your down payment is low, your lender may require it as an additional monthly cost.
Is this calculator accurate for adjustable-rate mortgages (ARMs)?
Not fully. This version is designed for fixed-rate mortgages. With an ARM, the rate can change later, so future payments may be higher or lower than the initial estimate.
Why is total interest so high on a 30-year mortgage?
Because interest is paid across many years. Early payments usually contain a larger interest portion, and the long repayment period increases the total amount paid in interest.
Is the total monthly payment the same as what a lender will show?
Not necessarily. Lenders may use different insurance assumptions, escrow estimates, fees, and rounding methods. This page is best used for planning, education, and scenario comparison.
Why this page matters beyond the calculation
Many mortgage pages stop at the formula. A better decision usually comes from understanding how borrowing cost, monthly cash flow, and long-term trade-offs connect.
- A lower monthly payment is not always “cheaper” if it dramatically increases lifetime interest.
- A larger down payment reduces debt, but it also ties up cash that could support an emergency fund or other goals.
- Taxes and insurance can make two similar home prices feel very different in practice.
- Understanding the structure of the payment helps you compare homes, rates, and terms more clearly.