Inputs
Comparison summary
Trend chart
Yearly comparison
Notes
- Actual variable-rate contract rules differ by lender.
- This tool applies a simple reamortization model at each rate-change point.
- Use a refinance break-even model separately for fee-inclusive decisions.
FAQ
How is payment recalculated after a rate change?
At each rate-change point, payment is recalculated from the remaining balance and remaining term (reamortization model).
What does baseline comparison mean?
Baseline assumes the initial rate remains constant for the full term. Scenario results show how much total interest, total paid, and maximum payment increase.
Does this match every lender contract rule?
No. Lender-specific caps, reset windows, and payment limits vary. Use this as a comparison model, then verify contract details.
Can I use this before checking refinance options?
Yes. First estimate stress under higher rates, then compare refinance cost-recovery with a refinance break-even calculator.