Overview
What this tool does
Mortgage Refinance Calculator: Compare current and replacement mortgages using payments, fees, remaining balances, balloon risk and two break-even measures. Explicit workflow boundaries Visible limitations and recovery Release-gated evidence
- Prepare a current balance, two loan terms, rates and refinance fees.
- Local dual-loan amortisation and break-even simulation.
- Confirm that payment, equity-aware break-even, lifetime cost and any maturity balloon are compared, then review the stated limits before copying or downloading anything.
Method
How this tool works
Local dual-loan amortisation and break-even simulation. The calculation or transformation is deterministic for the same supported input, and the worked example below shows the intended scope.
Example
Mortgage Refinance Calculator worked example
Input: a current balance, two loan terms, rates and refinance fees.
Expected output: payment, equity-aware break-even, lifetime cost and any maturity balloon are compared.
Limits
Assumptions and limits
- Inputs and files stay in this browser and are excluded from analytics.
- The worked example assumes a current balance, two loan terms, rates and refinance fees.
- Units, dates, rates, selections and source-file quality are taken exactly as entered unless the workspace labels a default.
- Current and replacement loans use separate remaining terms and explicit fee treatment.
- Quotes, variable rates, taxes, legal rules and lender-specific prepayment terms remain outside the model.
Privacy
Local processing
Values and files are processed locally in this browser unless the workspace explicitly identifies an optional network feature. Great Future does not intentionally collect tool inputs.
Sources
Method references and scope
Internal review owner: Great Future Financial Methods Review.
- Should I refinance? — Consumer Financial Protection Bureau. Reviewed 2026-08-29. Supports comparing refinance fees, loan features and total dollar cost rather than payment alone.
- Loan Estimate explainer — Consumer Financial Protection Bureau. Reviewed 2026-08-29. Supports checking modelled refinance results against written lender estimates.
Questions
Frequently asked questions
What input should I prepare for Mortgage Refinance Calculator?
Prepare a current balance, two loan terms, rates and refinance fees. Keep the original values or file available so you can compare the result.
What should I verify after using Mortgage Refinance Calculator?
Verify that payment, equity-aware break-even, lifetime cost and any maturity balloon are compared. Current and replacement loans use separate remaining terms and explicit fee treatment.
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