ARM Mortgage Calculator
Enter the loan, the fixed period and both rates to see the initial payment and what it becomes after the first reset.
- Free
- No sign-up
Enter the loan, fixed period and rates to see the ARM payments.
Worked example
With these example inputs:
- Loan amount$400,000
- Initial rate5%
- Fixed-rate period5 yr
- Rate after reset7%
- Full loan term30 yr
Initial monthly payment: $2,147
- Payment after reset$2,596
- Payment change$448.82
- Balance at reset$367,315
Frequently asked questions
How does an adjustable-rate mortgage work?
You pay a fixed rate for an initial period, then the rate adjusts. A 5/1 ARM is fixed for five years, then resets annually. This tool shows the payment before and after the first reset.
What happens at the reset?
The remaining balance is re-amortized over the remaining term at the new rate. If the rate rises, the payment jumps. A 5% rate moving to 7% can raise a payment by hundreds per month.