Practical guide
Understanding mortgage refinance check
Everyday editorial team · GEOINNOVATION CO., LTD · Published · Updated
What this calculation is for
Refinancing replaces a debt with new terms. A useful comparison includes closing costs, the remaining old term and the proposed new term, not just the interest rate. A smaller monthly payment can come from extending the debt rather than reducing total cost.
How the method works
The tool calculates current and proposed fixed-rate principal-and-interest payments. In this model, entered refinance costs are financed in the new balance. It also shows a simple fee-to-payment-savings break-even measure, which is a cash-flow heuristic rather than a full investment valuation.
A worked example
A $3,000 cost and a $100 monthly reduction imply a simple 30-month break-even. If you expect to sell or repay in 12 months, that reduction alone would not recover the cost over your expected holding period.
Assumptions and real-world differences
Compare total interest and remaining balances as well as payments. The simplified break-even omits tax effects, discounting, payoff penalties and changes to insurance or escrow. Financing the costs adds interest beyond their face amount.
Using the mortgage refinance check estimate
Start with the assumptions that match your situation, then read the headline together with the detailed breakdown. This tool’s baseline calculation uses remaining loan balance, current apr, new apr, current remaining term, new loan term, refinance closing costs. Changing an input changes only the modeled consequences of that input; it does not retrieve a quote or validate your eligibility.
Reproduce this tool’s example
These fixed example inputs are independent of edits you make above. Enter them in this tool to reproduce the result, then replace them with your own assumptions.
- Remaining loan balance
- 240,000 $
- Current APR
- 7 %
- New APR
- 6.25 %
- Current remaining term
- 24 years
- New loan term
- 20 years
- Refinance closing costs
- 4,500 $
Monthly payment change: $-64.5
New payment is not lower under these assumptions.
- Current monthly payment: $1,722.62
- Proposed monthly payment: $1,787.12
- Monthly change: $64.5
Frequently asked questions
- Is a lower rate always worthwhile?
- No. Fees, term changes and your time horizon can outweigh the rate reduction.
- Does break-even prove I should refinance?
- No. It is one simplified measure, not a recommendation or a net-present-value analysis.
- Do the example defaults represent a recommended plan?
- No. Defaults make the method inspectable. Replace them with relevant assumptions and test a less favorable case before making a decision.