Mortgage and home buying
Should You Refinance If Rates Drop by 1%?
Compare monthly savings, closing-cost recovery, and the risk of restarting the mortgage clock.
Decision summary
The decision this example tests
Should you refinance when mortgage rates drop by 1 percentage point?
Keeping the term at 25 years lowers the estimated principal-and-interest payment from about $2,160 to about $1,965, or roughly $195 per month. A $6,000 closing-cost estimate creates a simple break-even point near 31 months.
Specific money question
Should you refinance when mortgage rates drop by 1 percentage point?
Inputs used
- Current mortgage balance: $320,000
- Current rate: 6.5%
- New rate: 5.5%
- Current remaining term: 25 years
- New comparison term: 25 years first, then 30 years as a caution check
- Estimated closing costs: $6,000
Result summary
Keeping the term at 25 years lowers the estimated principal-and-interest payment from about $2,160 to about $1,965, or roughly $195 per month. A $6,000 closing-cost estimate creates a simple break-even point near 31 months.
Tradeoff to watch
What can change the answer
This scenario is most useful when you adjust one assumption at a time in the related calculator. The comparison cards below show which version of the decision deserves a second pass.
Step-by-step interpretation
- Start with the loan balance, not the original purchase price. The refinance math compares the debt that remains today against the proposed new loan.
- Compare the new loan over the same remaining term first. That isolates the rate change instead of mixing lower rates with a longer payoff schedule.
- Divide closing costs by the monthly savings to estimate a simple break-even month. In this example, $6,000 divided by about $195 is a little under 31 months.
- Run a second scenario using a new 30-year term only to understand the payment tradeoff. The monthly payment may fall further, but the loan can last longer and cost more interest.
Scenario comparison
Same 25-year term
This is the cleaner comparison because the payment drop mostly reflects the lower rate. It is useful if the goal is reducing interest without extending the debt schedule.
New 30-year term
This can create a lower payment, but it may also spread the balance over more years. Treat the lower payment as cash-flow relief, not automatic savings.
Common mistakes
- Calling a refinance good only because the payment is lower.
- Ignoring points, lender credits, escrow changes, or rolled-in closing costs.
- Refinancing shortly before a likely move without checking whether the break-even month happens first.
Disclaimer
This scenario is for education and planning only. It does not provide personalized financial, tax, legal, credit, mortgage, or investment advice. Real outcomes can differ because rates, fees, taxes, insurance, lender rules, market returns, and household circumstances vary. Read the full financial disclaimer.
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