When Does Refinancing Make Sense?
Mike Starr
Founder, MortgageWizardTools · M.S. Organizational Management
Refinancing replaces your existing mortgage with a new one. It makes sense when the financial benefit — lower payments, shorter term, or cash-out — exceeds the closing costs. But it is not always the right move.
The Break-Even Rule
Refinancing makes sense when you keep the loan past the break-even point — the time it takes for monthly savings to equal closing costs.
Break-Even Months = Closing Costs / Monthly Savings
Example: $5,000 closing costs / $200 monthly savings = 25 months. If you plan to stay longer than 25 months, refinancing pays off.
When Refinancing Makes Sense
- •Lower rate — at least 0.5% to 1% lower than your current rate
- •Shorten the term — 30 to 15 years saves tens of thousands in interest
- •Remove PMI or MIP — if your home has appreciated enough
- •Cash-out for major expenses — home improvements, debt consolidation, education
- •Switch from ARM to fixed — for payment stability
- •Remove a co-borrower — in a divorce or buyout situation
When It Does Not Make Sense
- •You plan to move soon — before the break-even point
- •The rate is not meaningfully lower — the savings may not cover costs
- •Your credit has declined — you may not qualify for a better rate
- •Your home value has dropped — you may not have enough equity
- •Extending the term — going from 20 years remaining to a new 30-year loan can cost more interest despite a lower payment
The Hidden Cost of Extending the Term
If you are 10 years into a 30-year loan and refinance to a new 30-year loan, you are paying interest for 40 total years. Even with a lower rate, the longer term can cost more in total interest.
Solution: Refinance to a 20-year or 15-year term to match your remaining timeline, or make extra payments to simulate a shorter term.
Common Refinancing Mistakes
- •Refinancing for a lower payment without calculating total interest
- •Extending the term and paying more over the life of the loan
- •Not shopping lenders (rates and fees vary significantly)
- •Cash-out refinancing for depreciating assets (cars, vacations)
- •Ignoring closing costs in the calculation
Key Takeaways
- •Calculate the break-even: closing costs divided by monthly savings
- •Refinance for a lower rate, shorter term, or to remove mortgage insurance
- •Avoid extending the term — it can cost more despite a lower payment
- •Shop multiple lenders for the best rate and lowest fees
- •Use our Refinance Calculator and Break-Even Calculator to run your numbers