Quick answer
Whether refinancing a $300,000 mortgage makes sense depends on the new rate, the new term, and how long it takes monthly savings to offset refinancing costs.
Should I Refinance a $300,000 Mortgage?
Use a realistic refinance example to compare monthly payment relief, term changes, and the effect of closing costs.
Worked example
A lower rate can reduce the payment, but refinancing can still be less attractive if the term resets for too long or closing costs are high.
| Item | Value |
|---|---|
| Mortgage balance | $300,000 |
| Main variables | New rate, new term, closing costs |
| Key decision | Monthly savings versus break-even time |
| Best tool | Compare new payment and cost recovery together |
What changes the result
Closing costs
Higher costs push the break-even point further out.
New loan term
A lower payment from a longer term can still increase total interest over time.
Try the calculator
Page details
- Updated April 15, 2026
- Built around a real example people search for.
- Use the linked calculator for your own numbers and assumptions.
Questions and answers
Does a lower rate automatically mean refinance is worth it?
No. Costs, term length, and expected time in the loan still matter.
Why is break-even so important?
Because it shows how long you need to stay in the loan before savings outweigh the refinance costs.