The Only Number That Matters
Refinancing replaces one mortgage with another. The monthly saving is easy to see and the closing costs are easy to ignore, so the honest test is the break-even point:
Break-even months = Closing costs / Monthly saving
Save $370 a month on $6,500 of costs and you break even after 18 months. If there is a realistic chance of moving, or refinancing again, before that month arrives, the deal loses money regardless of how much lower the rate looks.
The Reset Trap
The largest hidden cost in refinancing is not the fees — it is the calendar. Replacing a loan with 26 years left with a fresh 30-year loan lowers the payment partly through the lower rate and partly by stretching the debt four extra years. The monthly figure improves while the lifetime cost can rise.
| $285,000 balance | Payment | Interest remaining |
|---|---|---|
| Keep 7.5% loan, 26 years left | $2,079 | $363,589 |
| Refinance to 6.0% over 30 years | $1,709 | $330,139 |
| Refinance to 6.0% over 26 years | $1,806 | $278,466 |
| Refinance to 6.0% over 15 years | $2,405 | $147,899 |
Matching the new term to the years remaining captures the rate saving without restarting the clock. It is the option lenders quote least often and the one that usually wins.
What Closing Costs Cover
A refinance typically costs 2–5% of the loan: origination or points, appraisal ($500–$800), title insurance and search, recording fees, and prepaid escrow. A "no-cost" refinance does not remove these — it either rolls them into the balance or pays for them with a higher rate, usually about 0.25% more. That trade is sensible when you expect to move within a few years and terrible when you do not.
Cash-Out Refinancing
Borrowing more than you owe and taking the difference converts equity into cash at mortgage rates, which are far below credit card or personal loan rates. The costs: the new rate applies to the whole balance, not just the cash; cash-out loans price roughly 0.25–0.5% higher; most lenders require 20% equity remaining afterwards; and the debt is now secured by the house.
Using a cash-out refinance to clear credit card debt at 24% is arithmetically excellent and behaviourally risky — the cards are now empty, and the underlying spending has not changed.
When Refinancing Is Clearly Right
- The rate drop is large enough that break-even lands well inside your expected stay — the old "1% rule" is a rough guide, not a law.
- You are moving from an adjustable rate to a fixed one before the reset.
- You have reached 20% equity and can drop FHA mortgage insurance by refinancing to a conventional loan.
- You want a shorter term and can afford the higher payment.
Frequently Asked Questions
How much does a refinance cost?
Typically 2–5% of the loan amount. On a $285,000 refinance, $5,700 to $14,250, with $6,000–$8,000 being common.
Will refinancing hurt my credit score?
Slightly and briefly. The hard inquiry and the new account age cost a few points; rate shopping within a 45-day window counts as a single inquiry.
Can I refinance with no equity?
Conventional refinancing generally needs 20% equity. FHA and VA streamline programs allow it with less, and sometimes without a new appraisal, when the existing loan is already FHA or VA.