ARM Mortgage Payment Calculator
Result
ARM Mortgage Payment Calculator Estimate the monthly payment on an adjustable-rate mortgage (ARM) before and after the rate adjusts. Enter the loan amount, the initial fixed rate, the rate you expect after the adjustment, and the loan term. The calculator — free online calculator.
Formula
- Adjustable-rate mortgage estimate calculator. This page documents the mathematical loan model used for the estimate and provides an educational example.
- The main inputs are Home price, Down payment, Annual interest rate, Loan term. Enter them in the units and format shown in the calculator.
- Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: ARM Mortgage Payment
- Home price: 300000
- Down payment: 60000
- Annual interest rate: 6 %
- Loan term: 30 years
The calculator compares payment before and after an assumed rate adjustment.
Sample result: Calculating…
Frequently asked questions
What does the ARM Mortgage Payment calculate?
Actual ARM changes depend on index, margin, caps, floors, reset dates, and future index values.
Which values should I enter?
Enter Home price, Down payment, Annual interest rate, Loan term using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Initial payment uses standard amortization; adjusted payment re-amortizes the remaining balance at the entered adjusted rate.
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.