Mortgage Calculator
Our Mortgage Calculator is a practical way to estimate the cost of buying a home with a mortgage. Enter the home price, down payment, loan term and interest rate to see an estimated principal-and-interest payment. You can also add common ownership costs such as property taxes, homeowners insurance, PMI, HOA charges and other annual expenses. The calculator then updates the payment summary, payoff date, amortization schedule and visual charts.
How to Use the Mortgage Calculator
Start by entering the purchase price of the home. Next, enter the down payment as a percentage of the purchase price. The calculator subtracts that amount from the home price to determine the starting loan balance. Enter the number of years for repayment and the annual interest rate offered by the lender. When you click Calculate, the calculator builds a payment schedule for the selected term.
If you want a broader estimate of your monthly housing cost, keep Include Taxes & Costs enabled. You can then enter annual property taxes, annual home insurance, an estimated annual PMI rate, monthly HOA fees and other annual costs. These amounts are displayed separately so that the mortgage payment itself is not confused with the other expenses of home ownership.
The optional extra-payment field is useful for testing a common payoff strategy. Increasing the amount paid toward principal can reduce the number of payments required and can lower the amount of interest paid over the life of the loan.
What Is a Mortgage?
A mortgage is a loan used to finance the purchase of real estate. The property generally serves as security for the loan. The borrower makes scheduled payments to the lender until the loan is paid off according to the agreement. A typical payment contains principal and interest, while many homeowners also pay amounts for taxes, insurance or other housing expenses through an escrow arrangement.
The principal is the amount originally borrowed. Interest is the financing cost charged by the lender. During the early part of a long fixed-rate mortgage, a relatively large share of each scheduled payment can go toward interest. As the balance falls, more of the payment is applied to principal. This changing split is one of the main reasons an amortization schedule is useful.
Main Mortgage Calculator Components
Home Price
Home price is the purchase price used as the starting point for the calculation. It does not automatically include every transaction expense. Closing costs, moving expenses, renovations and other one-time expenses can require additional cash.
Down Payment
The down payment is the portion of the purchase price paid upfront. A larger down payment generally means a smaller starting loan balance. Depending on the loan program and the amount put down, mortgage insurance may or may not be required.
Loan Term
The loan term determines how long the scheduled repayment lasts. A longer term usually produces a lower required principal-and-interest payment, but the borrower can pay substantially more interest over the full life of the loan. A shorter term can increase the monthly payment while reducing the total time the debt remains outstanding.
Interest Rate
The interest rate determines the financing charge applied to the outstanding loan balance. This calculator uses a fixed-rate assumption, meaning the entered rate remains unchanged during the modeled repayment period. Adjustable-rate mortgages can behave differently because their rates may change according to the loan agreement.
Understanding Your Monthly Mortgage Cost
The principal-and-interest payment is only one part of the cost of owning a home. Depending on the property and loan, a homeowner may also have property taxes, homeowners insurance, mortgage insurance, HOA dues and maintenance or other recurring expenses.
Property Taxes
Property taxes are generally assessed by local government authorities. The amount varies considerably by location and by the assessed value of the property. In this calculator, the annual tax percentage is converted into an estimated monthly amount for the payment summary.
Homeowners Insurance
Homeowners insurance helps protect against covered property losses and may include liability coverage. Premiums depend on the property, location, coverage and insurer. Entering an annual estimate lets the calculator show an approximate monthly cost.
Private Mortgage Insurance
PMI can apply to certain conventional loans when the down payment is relatively small. The exact requirement and cost depend on the loan, lender and borrower. The PMI field in this calculator is an estimate and should not be treated as a quote from a lender.
HOA and Other Costs
Homeowners association charges, maintenance, utilities and other ownership expenses can materially affect affordability. These expenses are not part of the lender's principal-and-interest payment, but including them can provide a more realistic household budget.
Why the Amortization Schedule Matters
The amortization schedule shows how the loan balance changes over time. Each row represents a payment period and displays the payment, interest, principal and remaining balance. The annual view is useful for seeing the broad trend, while the monthly view provides a more detailed picture.
The schedule on this page is recalculated whenever you change the major inputs. The charts use the same calculated schedule, so changing the loan amount, interest rate, term or extra payment also changes the visual information.
Extra Mortgage Payments
Making an additional payment toward principal can reduce the outstanding balance faster. Because future interest is calculated from the remaining balance, reducing principal earlier can also reduce future interest. The effect depends on the loan's rate, remaining term and the amount and timing of extra payments.
Extra payments are not automatically the best choice for every borrower. Before making large additional payments, a homeowner may want to consider emergency savings, other higher-interest debts, investment opportunities, taxes and any applicable prepayment provisions in the loan agreement.
Fixed-Rate and Adjustable-Rate Mortgages
A fixed-rate mortgage uses an interest rate that remains fixed according to the loan contract. This makes principal-and-interest payments easier to forecast. An adjustable-rate mortgage can have a fixed introductory period followed by rate adjustments. Because future adjustments depend on the loan's terms and market conditions, this calculator does not attempt to predict future ARM rate changes.
Mortgage Costs That Are Not Included in the Basic Payment
Buying a home can involve one-time expenses that are separate from the regular mortgage payment. Examples include lender charges, appraisal expenses, title services, recording fees, inspections, prepaid items and other closing expenses. Renovations, furniture, moving expenses and major repairs can also require additional cash.
How Interest Changes Over the Life of a Loan
For a standard amortizing fixed-rate loan, interest for a payment period is based on the outstanding principal. Early in the loan, the balance is largest, so the interest portion is usually larger. As principal is repaid, the balance falls and the interest portion tends to decline. The principal portion therefore becomes larger as the loan approaches payoff.
Using the Results for Home-Buying Planning
A mortgage estimate should be considered alongside income, savings, existing debts, insurance, taxes, maintenance and other household expenses. A payment that looks manageable in isolation may not fit comfortably into a complete household budget. It can be useful to run several scenarios, such as a higher down payment, a different interest rate, a shorter term or a modest extra payment.
Mortgage Calculator Limitations
This online calculator is intended as a planning tool rather than a loan offer. It does not know the underwriting rules of a particular lender, the exact property-tax assessment, the final insurance premium, credit-based pricing, lender fees or every possible loan feature. Actual loan documents and lender disclosures should be used when making a borrowing decision.
Frequently Asked Questions
Does the calculator include taxes and insurance?
Yes. You can enable the taxes and costs section and enter estimated property taxes, homeowners insurance, PMI, HOA fees and other costs. These are shown separately from principal and interest.
Can I calculate the effect of paying extra each month?
Yes. Enter an extra monthly amount. The calculator will rebuild the amortization schedule and show the revised payoff date and estimated interest savings compared with the regular payment schedule.
Why does my lender's payment differ from this result?
Lenders can use different assumptions and may include additional fees, insurance, taxes, mortgage insurance rules or escrow amounts. Your actual rate and loan terms may also differ from the values entered here.
Can I use this calculator outside the United States?
The calculator can be used for general mortgage mathematics, but taxes, insurance, lending practices and mortgage products differ by country. The cost categories and examples on this page are primarily designed around common U.S. mortgage planning.
Final Reminder
Use the calculator to compare scenarios rather than relying on a single number. Try changing the down payment, interest rate, loan term and extra payment to see how each decision affects monthly cost, total interest, payoff timing and the remaining balance. For an actual mortgage decision, verify the final figures with your lender and review all loan disclosures before signing.