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Adjustable-Rate Mortgage Payment Scenario — result sheet
Compare initial and reset payments for an adjustable-rate mortgage under two explicitly entered fixed rates.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: For each entered rate, payment = P·r(1+r)^n/((1+r)^n−1).
The tool compares two fully amortizing payment scenarios and does not guess a lender's index, margin, cap, or reset schedule.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Principal — currency; minimum 1.0E-6; maximum 1000000000
- Initial annual rate — %; minimum 0; maximum 1000
- Reset annual rate — %; minimum 0; maximum 1000
- Term — years; minimum 1.0E-6; maximum 1000
- Payments per year — minimum 1; maximum 366
Worked example
| Input | Value |
|---|---|
| Principal | 250000 |
| Initial annual rate | 4 |
| Reset annual rate | 7 |
| Term | 30 |
| Payments per year | 12 |
Initial payment ≈1,193.54; reset scenario ≈1,663.26 currency units/month.
Assumptions and limits
- Both rates are nominal annual rates with the selected payment frequency and the term is positive.
- The entire principal is amortized over the same term at each scenario rate.
- Index rules, margins, caps, floors, fees, taxes, insurance, and lender documents are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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