What Is Mortgage Refinancing?
Refinancing means replacing your existing mortgage with a new one, typically to get a lower interest rate, change your loan term, or access home equity. The new mortgage pays off the old one, and you start fresh with new terms.
The catch: refinancing comes with closing costs — typically 1–3% of the loan balance. On a $480,000 mortgage, that's $4,800–$14,400 out of pocket. Whether refinancing makes sense depends on how long it takes to recover those costs through your monthly savings.
The Break-Even Rule
The most important number in any refinancing decision is your break-even point — the number of months until your accumulated monthly savings equal your closing costs.
Break-Even Months = Total Closing Costs ÷ Monthly Payment Savings
If you plan to stay in your home longer than your break-even point, refinancing saves you money. If you plan to sell or move sooner, you'll leave money on the table.
| Closing Costs | Monthly Savings | Break-Even Point |
|---|---|---|
| $6,000 | $150/mo | 40 months (3.3 years) |
| $8,500 | $200/mo | 42.5 months (3.5 years) |
| $10,000 | $350/mo | 28.6 months (2.4 years) |
| $12,000 | $180/mo | 66.7 months (5.6 years) |
Calculate Your Break-Even Point
Enter your current rate, new rate, remaining term, and closing costs to instantly see if refinancing makes sense for you.
Use the Refinance Calculator →When Refinancing Makes Sense
✓ Good time to refinance
- Rates dropped 0.75%+ since you bought
- You plan to stay 3+ years past break-even
- You want to shorten your term (25yr → 20yr)
- You're switching from variable to fixed during uncertainty
- Your credit score improved significantly
✗ Probably not worth it
- Rate drop is less than 0.5%
- You're planning to sell within 2–3 years
- You're near the end of your mortgage term
- Closing costs would take 5+ years to recover
- You'd reset to a longer amortization period
The 1% Rule — Is It Still Useful?
You may have heard the rule that refinancing makes sense when rates drop by at least 1%. This was a useful shorthand decades ago when closing costs were lower, but it's an oversimplification today.
A 0.75% rate drop on a $700,000 mortgage produces far more monthly savings than a 1.5% drop on a $150,000 mortgage. What actually matters is the dollar amount of your monthly savings vs. your actual closing costs — which is exactly what the break-even formula calculates.
Hidden Costs to Watch For
Not all closing costs are obvious. Before committing to a refinance, ask your lender for a complete Loan Estimate and check for:
- Prepayment penalties on your existing mortgage (can be 2–3% of the balance)
- Mortgage discharge fees charged by your current lender
- Legal/title fees for the new mortgage registration
- Appraisal fees if the lender requires a new property valuation
- Mortgage insurance if you're refinancing above 80% loan-to-value
Refinancing to a Shorter Term
Even if rates haven't changed much, refinancing from a 25-year to a 20-year mortgage can dramatically reduce total interest — but your monthly payment will be higher. This strategy works best if your income has grown since you took out the original mortgage and you can comfortably afford the higher payment.
The Bottom Line
Refinancing is worth it when your break-even point is well within your expected time in the home and the rate reduction is meaningful in dollar terms. Run the numbers before talking to a lender — it takes 60 seconds with a calculator and prevents you from being sold a refinance that doesn't actually benefit you.
Run Your Numbers Now
Free refinance break-even calculator — see your monthly savings, break-even point, and 5-year net benefit instantly.
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