Interest-Only Mortgage Calculator
Calculate payments and total costs for interest-only mortgages with adjustable amortization periods
About this calculator
An Interest-Only Mortgage Calculator helps you determine monthly payments and total costs for loans where you initially pay only interest, with principal payments beginning later. This tool is essential for understanding the financial impact of interest-only periods, comparing different amortization schedules, and planning for payment increases when the interest-only period ends. It's particularly valuable for investors, homebuyers with irregular income, or those considering non-traditional mortgage structures to optimize cash flow management.
How to use
Enter your loan amount, interest rate, and interest-only period length. Specify the total amortization period to see how payments change after the interest-only phase ends. The calculator will display your initial interest-only payments, future principal and interest payments, and total loan costs for informed decision-making.
Frequently asked questions
What happens after the interest-only period ends?
Monthly payments increase significantly as you begin paying both principal and interest over the remaining loan term.
Are interest-only mortgages risky?
Yes, they carry higher risk due to payment shock, no equity building during interest-only period, and potential negative amortization.
Who benefits from interest-only mortgages?
Real estate investors, borrowers expecting income increases, or those needing lower initial payments for cash flow management benefit most.