Mortgage payment calculator
Try this free mortgage calculator to calculate your monthly payments and explore how your mortgage works over time. Adjust your home price, interest rate, and amortization period to see instant results and plan your budget with confidence.
Principal vs. interest breakdown
| Amount paid The total amount you'll pay over 25 years. Your original mortgage of $300,000 plus $226,131 in interest. | $526,131.04 |
| Interest paid The total cost of borrowing over 25 years. The amount you pay on top of your original mortgage of $300,000. Calculated as $526,131 total paid minus $300,000 mortgage amount. | $226,131.04 |
| Interest on principal The total interest expressed as a percentage of your original mortgage amount of $300,000. Meaning for every $1 borrowed - you pay $0.75 in interest. Note that the donut (or pie) chart shows interest as a percentage of total amount paid ($526,131), which will always be a lower percentage. | 75.38% |
| Monthly payment The fixed amount you pay each month toward your mortgage. | $1,753.77 |
| Annual payment Your total mortgage payments for one full year. Simply your monthly payment multiplied by 12. Useful for annual budgeting and tax planning. | $21,045.24 |
Amortization schedule: annual payments breakdown
Monthly amortization schedule (payments, interest & balance)
| Interest paid | Principal paid | Remaining balance | |
|---|---|---|---|
| Month 1 | $1,250.00 | $503.77 | $299,496.23 |
| Month 2 | $1,247.90 | $505.87 | $298,990.36 |
| Month 3 | $1,245.79 | $507.98 | $298,482.38 |
| Month 4 | $1,243.68 | $510.09 | $297,972.29 |
| Month 5 | $1,241.55 | $512.22 | $297,460.07 |
| Month 6 | $1,239.42 | $514.35 | $296,945.72 |
| Month 7 | $1,237.27 | $516.50 | $296,429.22 |
| Month 8 | $1,235.12 | $518.65 | $295,910.57 |
| Month 9 | $1,232.96 | $520.81 | $295,389.76 |
| Month 10 | $1,230.79 | $522.98 | $294,866.78 |
| Month 11 | $1,228.61 | $525.16 | $294,341.63 |
| Month 12 | $1,226.42 | $527.35 | $293,814.28 |
Mortgage insights
- Over the 25-year period you made 300 payments of $1753.77
- In the early years of a mortgage, a larger portion of your payment goes toward interest rather than principal.
- As time goes on, more of your payment is applied to reducing your mortgage balance.
- This is a standard amortization schedule used by Canadian lenders.
How this mortgage payment calculator works
Use this mortgage calculator to estimate your monthly mortgage payment, total interest paid, and overall loan cost based on your home price, interest rate, and amortization period. Whether you're planning to buy a home or refinance, this tool helps you understand how different loan terms affect your monthly payments. For example, a $300,000 mortgage at a 5% mortgage rate over 25 years results in a predictable monthly payment, making it easier to budget and compare options. Adjust the values above to explore different scenarios and find the best mortgage for your financial situation. Before committing to a mortgage, use our after-tax income calculator to confirm your net take-home pay can comfortably cover the monthly payment.
Tips to reduce mortgage interest
Lowering the amount of interest you pay over the life of your mortgage comes down to smart planning and strategic choices. Securing a lower mortgage rate on your home loan, often by improving your credit score or increasing your down payment, can significantly reduce long‑term costs. Choosing a shorter amortization period, making extra lump‑sum payments, or increasing your regular payment amount also helps you pay down the principal faster, cutting total interest. Comparing lenders and negotiating rates ensures you're not leaving money on the table.
Mortgage payment formula explained
Mortgage payments are calculated using an amortization formula that spreads your loan into equal monthly payments over a fixed period. Each payment includes both principal and interest, with a larger portion going toward interest at the beginning of the loan and gradually shifting toward the principal over time. This process is known as amortization and is key to understanding how your loan balance decreases.
While the formula itself can be complex, a mortgage calculator simplifies the process by instantly showing how changes to your interest rate, loan term, or loan amount impact your monthly payment and total interest paid. This allows you to make informed decisions without needing to manually calculate each scenario.
By adjusting your inputs, you can compare different scenarios and understand how even small changes in interest rates or loan terms can significantly impact your total cost over time. If you're also financing a vehicle or personal loan alongside your mortgage, our loan payment calculator can help you estimate those payments side by side.
Frequently asked questions
How do you calculate mortgage payments?
Calculating your mortgage payment starts with four key factors: loan amount, interest rate, amortization period, and payment frequency. Using these inputs, a mortgage calculator applies the standard amortization formula to show your monthly payment, how much goes toward interest vs. principal, and how your balance decreases over time. This helps you compare loan options, plan your budget, and understand the true long‑term cost of your mortgage.
What affects your monthly mortgage payment?
Your monthly mortgage payment is shaped by several key factors: the size of your loan, your interest rate, the length of your amortization period, and whether you choose fixed or variable rates. Property taxes, home insurance, and mortgage default insurance can also increase your total monthly cost. Understanding how each of these elements influences your payment helps you compare lenders, plan your budget, and make confident home-buying decisions.
How much mortgage can you afford?
Mortgage affordability depends on your income, existing debt, interest rate, and down payment. Lenders typically use debt-to-income ratios to assess affordability, ensuring your monthly housing costs stay within a manageable portion of your income. A mortgage calculator helps you quickly estimate different scenarios by adjusting the loan amount, interest rate, and term, so you can find a comfortable monthly payment before committing to a home purchase. It's important to leave room in your budget for additional costs such as property taxes, home insurance, maintenance, and unexpected expenses. By testing different values in the calculator, you can better understand your financial limits and avoid becoming "house poor" while still achieving your homeownership goals.
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