Adjustable Rate Mortgage Calculator
Calculate payments for an adjustable-rate mortgage. See how rate changes after the introductory period impact your monthly payment.
INTRO PAYMENT
$1,703/mo
AFTER ADJUSTMENT
$2,050/mo
Payment jump: +$346/mo (20.3% increase)
Total interest: $417,150
How Adjustable Rate Mortgages Work
An ARM offers a lower fixed rate for an intro period (typically 3, 5, 7, or 10 years), then adjusts periodically based on a reference index plus a margin. Common structures:
- 5/1 ARM: Fixed for 5 years, adjusts annually after
- 7/6 ARM: Fixed for 7 years, adjusts every 6 months
- 10/1 ARM: Fixed for 10 years, adjusts annually
Rate caps limit how much the rate can change: initial cap (first adjustment), periodic cap (each subsequent adjustment), and lifetime cap (maximum over the loan's life).