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A fixed-rate mortgage amortizes over the loan’s repayment period, meaning the proportion of interest paid vs. principal repaid changes each month while the total monthly payment stays the same. As the loan amortizes, the amount of monthly interest paid decreases while the amount of principal paid increases.

To generate an amortization calculator for a fixed-rate mortgage, use the calculator below. For example, if you’re going to borrow $100,000 at 5% and repay it over 30 years, enter “$100,000” as the Mortgage Amount, “30” as the Term, and “5” as the Annual Interest Rate.