A homeowner with a $340,000 balance at 7.25% opens three lender sites on a Tuesday night. The advertised rates read 6.49%, 6.375% and 6.5%, so the middle one looks like the winner. By Thursday the actual Loan Estimates are in her inbox, and that 6.375% quote now carries $4,200 in discount points and a $795 application fee. Over a five-year hold, the cheapest-looking rate has turned into the most expensive loan on the table.
That gap between the marketing number and the real number is exactly what a refinance interest rate comparison is meant to close. Not with a rate table, but with a like-for-like look at what each offer costs and what it returns.
Three numbers decide every rate comparison
Lenders quote rates on different assumptions, and those assumptions are where comparisons go crooked. Line up any two offers on these three figures and the picture usually sorts itself out.
- The note rate. The interest charged on the balance. Simple, and the least interesting number in isolation.
- Points and lender fees. Money paid upfront to buy the rate down or to cover origination. One point equals 1% of the loan amount, so $3,400 on a $340,000 balance.
- Third-party closing costs. Appraisal, title, recording, credit, escrow setup. These swing by state and property, sometimes by more than $2,000.
The APR folds most of those costs into a single annualized figure. Useful for a first pass, misleading for a second one, because APR assumes you keep the loan for the full term. Most refinancers don’t. Refinance again in four years, sell in six, and the APR you compared never actually played out.
Break-even month, not break-even year
Subtract the new payment from the old one, then divide the total cost of refinancing by that monthly difference. The result tells you how many months you need to stay put before the refinance pays for itself.
Real numbers: $340,000 at 7.25% over 30 years runs about $2,319 a month in principal and interest. At 6.5%, it’s roughly $2,149. That’s $170 a month. Add $4,800 in combined closing costs and points, and the break-even lands at 29 months. Move in year three and you’ve paid the lender for a lower rate you stopped using.
Run the same math on a 20-year term and the payment barely drops at all, because you’re compressing the schedule. A shorter term can be a legitimate goal, but don’t confuse it with a payment win. What actually moves your monthly payment after a refinance comes down to term length and balance far more than the rate alone.
Same borrower, different rate
Two lenders can price the identical borrower, property and lock period differently by 0.375%, and both can be following their own guidelines. Servicing economics, warehouse lines, how much margin a lender needs that quarter, whether the loan fits a portfolio product or gets sold to an agency, and how the loan officer gets paid all feed into the number. A credit union running thin margins may beat a national bank on a plain 30-year fixed and lose badly on a jumbo.
So collect at least four quotes, including one from a broker who can shop wholesale pricing. Why the same loan costs more at one bank than another is rarely about your file and almost always about the lender’s cost structure.
Points reframe the whole comparison
When one quote sits meaningfully below the others, points are usually the reason. Paying 1.5 points to shave 0.375% off the rate can be smart over a decade and a pure loss over three years.
Do the payback on the points separately from everything else. On $340,000, 1.5 points is $5,100. A 0.375% reduction saves roughly $85 a month, which means 60 months before that money comes back and the lower rate starts earning anything. If there’s a decent chance you sell or refinance inside five years, take the higher rate and keep the cash. What you give up with a no-points refinance is worth understanding before assuming zero points is the safe pick.
Closing costs move the break-even more than people expect
Rate shopping gets the attention; closing costs quietly undo half the benefit. A 6.5% rate with $6,200 in costs loses to a 6.625% rate with $2,400 in costs across a four-year hold. Ask every lender for a Loan Estimate in the same format on the same day, then compare page 2 line by line: origination charges, services you cannot shop for, services you can shop for, and taxes and government fees.
Some of that is negotiable and some isn’t. Where the savings really come from on low-closing-cost refinance rates is usually title work, lender credits and a waived appraisal, not a magically lower rate.
Running the comparison in one sitting
Pricing moves fast, so assemble the whole thing inside 72 hours rather than over three weeks.
- Pull your current statement first. Balance, rate, remaining term, escrow status and whether there’s a second lien. Vague inputs produce useless quotes.
- Request four Loan Estimates on identical terms. Same loan amount, same term, same lock length, same impound choice. Any difference in those four items contaminates the comparison.
- Compute break-even for each offer. Total cost divided by monthly savings. Write the number next to the rate so you stop ranking offers by the wrong figure.
- Ask for written counteroffers. Send the best estimate to the other three and ask them to beat it on rate, costs, or both. Lenders do move, especially when they can see a competitor’s numbers.
When the higher rate is genuinely the better deal
Lender credits are the obvious case. Taking a rate 0.25% higher in exchange for $3,000 toward closing costs makes sense when cash is tight or the holding period is short, because you’re trading a small monthly cost for real upfront money.
Debt consolidation is another. Replacing a 24% credit card balance with mortgage debt at 7.1% is a win even if a different lender would have offered 6.875% on the same loan. Compare the refinance against the debt you’re actually retiring, not just against other refinance quotes.
The clock on your comparison
Rate quotes have a shelf life measured in days, sometimes hours. Confirm the lock period attached to each quote, whether it’s 30, 45 or 60 days, and what happens if closing slips past the lock. A one-time float-down is worth real money; a 0.125% extension fee is not.
Ask too whether the quoted rate assumes a specific credit score band, an owner-occupied property and a loan-to-value under 80% with no subordinate lien. One of those assumptions shifting can add a quarter to half a point at the closing table. Where refinance rates sit this month and whether they save you anything gives you a current baseline to sanity-check every quote against.
The most useful question in the entire process is short: “What is your best rate with zero discount points and zero lender fees on a $340,000 loan, 30-year fixed, owner-occupied, 780 credit score, 70% LTV, 45-day lock?” Ask it of every lender in the same week and the answers finally become comparable. After that it’s arithmetic, not persuasion, and the loan officer on the other end knows it.