Estimate the monthly principal and interest payment on a rental property loan, and see exactly how much interest you'll pay over the life of the mortgage.
▶ Run the CalculatorOpens live in the Rental Flow app - no account needed.
A mortgage payment calculator tells you the fixed monthly payment on an amortizing loan - the amount that covers both interest and principal so the loan is fully paid off by the end of its term. For landlords, this is the single biggest line in your monthly carrying cost, so getting it right is the starting point for every other return calculation.
Where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the total number of monthly payments (years × 12).
| Loan amount | $200,000 |
| Interest rate | 6.5% / year |
| Term | 30 years (360 payments) |
| Total paid over the term | $455,089 |
| Total interest | $255,089 |
| Monthly payment | $1,264.14 |
Notice that over 30 years you pay more in interest than the original loan amount. That's why the term and rate matter as much as the price you pay for the property.