Mortgage Calculator for Adjustable Rate Loans (ARM)
Use our detailed mortgage calculator for adjustable rate loans (ARM) to understand your repayment schedule, estimate future costs, and model potential rate adjustments based on your loan's specific caps and indexing structure. This tool is essential for planning your financial future when choosing an ARM.
Estimate Your ARM Payments and Maximum Risk
Enter the specifics of your adjustable rate mortgage below to project your fixed payments and estimate the possible worst-case scenario after the first adjustment period, accounting for your contractual rate caps.
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Enter your adjustable rate loan parameters to calculate your initial monthly payment and project your maximum potential payment after adjustments. Our example below shows a \$300,000 loan with a 5-year fixed period (4.5% rate) and a maximum 6% lifetime cap.
| Initial Fixed Payment | Worst-Case Adjusted Payment |
|---|---|
$1,520.06 |
$2,456.96 |
| ARM Metric | Initial (Fixed Period) | Maximum (Capped Rate) |
|---|---|---|
| Interest Rate | 4.50% | 10.50% |
| Monthly Payment (P&I) | $1,520.06 | $2,456.96 |
| Total Interest (Projected) | $247,222.08 | $410,212.98 |
| Remaining Principal (After Fixed Period) | $270,123.45 | $270,123.45 |