Refinancing $500,000 From 6.75% to 5.5%: Break-Even and Lifetime Cost
A 1.25-point improvement on a half-million-dollar balance with twenty-eight years to run. See what scale does to both the break-even and the lifetime figure.
Current loan balance $500,000 · Current interest rate 6.75% · Years left on current loan 28 years · +3 moreYour figuresEdit figures
What you still owe today
The rate you pay now
Years still to run
The rate you are offered
Years the new loan runs
Fees to complete the refinance
Break-even point
You earn the closing costs back in 23 months — refinance if you expect to keep this loan longer than that.
23 months to earn back the closing costs.
- Break-even point
- 23 months
- Monthly saving
- $396
- Lifetime interest saved
- $133,159
- Saving after closing costs
- $124,159
Over the years each loan still has to run, refinancing costs $124,159 less — and that is AFTER the $9,000 of closing costs.
| Scenario | Keep current loan | RefinanceBetter |
|---|---|---|
| Years still to pay | 28 | 28 |
| Monthly payment | $3,316 | $2,920 |
| Interest over those years | $614,221 | $481,063 |
| Closing costs | $0 | $9,000 |
| Interest + closing costs | $614,221 | $490,063 |
Method: Standard fixed-rate amortization, compared scenario against scenario
- Both loans are fixed rate with monthly compounding, and neither rate ever changes.
- The new loan equals your current balance: no cash taken out, and closing costs paid at settlement rather than rolled in.
- Property tax, hazard insurance and mortgage insurance are excluded, and no early payoff or missed payment is modelled.
- No tax table is used. Figures are estimates for comparison, not a lender quote or tax advice.
No tax rates are used in this calculation.
This is an estimate, not financial or tax advice. Confirm figures with the linked source or a licensed professional before acting on them.
At half a million, the lifetime figure is the one that matters
On a half-million-dollar balance with twenty-eight years still to run, the monthly saving from a rate improvement this large is big enough that most people stop reading there. That instinct is backwards. At this scale the break-even is almost always short relative to how long anyone keeps such a loan, so the break-even is the least interesting number on the page. The figure that deserves your attention is the lifetime interest comparison, because at this balance the gap between two structures is measured in an amount of money that would be a down payment on another house.
The reason is compounding on a large outstanding principal. Interest accrues on whatever is left every single month it is left, and half a million dollars sitting at six and three-quarter percent generates a great deal of it. Shaving a percentage point and a quarter off the rate at which that accrual happens, for twenty-eight years, is a structural change in what the house costs you rather than a monthly convenience. It is also why a lender's willingness to move even a quarter point on a loan this size is worth pursuing hard.
The corresponding risk at this scale is that large numbers make it easier to wave through a large fee sheet. Nine thousand dollars sounds proportionate against a half-million-dollar loan, and lenders know it. But most of what makes up that figure is priced per transaction rather than per dollar borrowed, so a fee total that scales with your loan size is a choice someone made, not a cost that had to be incurred. Ask for the itemisation and ask what each line is for.
Finally, twenty-eight years remaining means you are near the start of the amortization schedule, where nearly all of each payment is interest. That is the position in which a rate cut does the most work, and it is worth noticing that the same quote five years from now would be worth measurably less, not because the rate changed but because you did.
What loan size does to the fee sheet and the rate sheet
A half-million-dollar balance sits in a part of the market where pricing behaves differently, and it is worth knowing which differences are real. Loans above the conforming limit in your county are jumbo loans, priced off a separate sheet that can be either better or worse than conforming pricing depending on the month and the lender's appetite; either way it is a different market, so quotes from two lenders can diverge more than you would expect. Below the limit, a large conforming balance is attractive business, and that is leverage you can use on the fee side.
The parts of the fee total that genuinely scale with loan size are few. Origination expressed as a percentage of the loan does. Title insurance premiums do, on a sliding scale. Transfer taxes, where they apply to refinances at all, do. Nearly everything else — appraisal, credit report, settlement, recording — is transaction-priced, and a lender quoting them proportionally is quoting a margin rather than a cost. Asking for the estimate with each line labelled makes that visible immediately.
The last thing scale changes is what the alternatives are worth comparing against. At this balance, paying discount points to buy the rate down further is a real option with a real payback period of its own, and so is a shorter term that raises the payment while cutting lifetime interest sharply. Both are worth modelling on this page as separate scenarios rather than argued about in the abstract: change one input, read the lifetime interest figure, and let the comparison settle it.
What closing costs include
The closing cost figure you enter should be everything you pay to get the new loan, whether it comes out of your pocket at settlement or is added to the balance. Typical components are the lender's origination or underwriting fee, discount points if you bought the rate down, an appraisal, a credit report, title search and title insurance, settlement or attorney fees, recording fees and any state or local transfer tax that applies to a refinance. On a mid-size loan the total commonly lands somewhere between two and five percent of the amount refinanced, which is why the break-even is measured in years rather than months.
Two items deserve care. A no-closing-cost refinance is not free — the fees are paid through a higher rate instead, so enter zero costs and the higher rate you were actually quoted, and compare that against the version with costs and the lower rate. And rolling the fees into the balance does not remove them either; it borrows them at the mortgage rate for the whole term. This calculator assumes the costs are paid at settlement and the new loan equals your current balance, so that the break-even figure is attributable to one thing at a time.
Prepaid interest, escrow deposits for taxes and insurance, and any refund of your old escrow account are transfers of timing rather than costs of the refinance, and are best left out of the number you enter here.
How to read your result
The headline is the number of whole months before the accumulated saving equals the closing costs, rounded up, because a partial month has not finished paying anything back. Compare it against your own horizon first. If you expect to keep the loan comfortably longer than the break-even, the refinance is doing what it is supposed to. If the two numbers are close, the decision is much finer than the rate difference makes it look, and small differences in the fee quote will decide it.
Beneath the headline, the monthly saving tells you how quickly the clock runs, and the two interest figures tell you what the whole loan costs under each scenario. If the lifetime interest saved is negative, read that as the price of the lower payment rather than as a reason to stop, and decide whether the cash flow is worth it.
Every figure here is an estimate from the six values you entered. It assumes a fixed rate on both loans, no cash taken out, no change to property tax, hazard insurance or mortgage insurance, and no early payoff. A lender's own quote will differ where any of those assumptions differ, and it is the written offer that governs. Change any input and the page recalculates immediately with no reload, and the link at the top of the result carries your scenario so you can send it to someone else and have them open the same numbers.
Frequently asked questions
Is a $500,000 refinance treated differently by lenders?
It can be. If the balance exceeds the conforming loan limit for your county it becomes a jumbo loan priced from a separate rate sheet, which sometimes beats conforming pricing and sometimes trails it depending on the lender and the month. Below the limit, a large conforming balance is profitable business a lender wants to win, which gives you genuine leverage on the fee sheet. Either way, collect quotes from more than two lenders, because the spread at this size is wider than most borrowers expect.
Should I focus on the monthly saving or the lifetime interest at this balance?
The lifetime figure. On a half-million-dollar loan with most of its term still to run, the break-even is typically short relative to any realistic holding period, so it rarely decides anything. The gap in total interest between two structures, by contrast, is large enough at this scale to be the single most consequential number in the comparison — and it is the one a lender's monthly-payment pitch is least likely to mention.
How is the refinance break-even point calculated?
Divide the total closing costs by the monthly saving, where the saving is your current principal and interest payment minus the payment on the proposed loan. The result is the number of months of lower payments needed before the accumulated saving equals what the refinance cost. This page rounds up to a whole month, because a partial month has not finished paying anything back, and it ignores what you could have earned on the fees had you invested them instead.
What if my monthly payment does not go down at all?
Then there is no break-even point, and this calculator says so in words instead of printing a zero or a negative month count. It usually happens when the new term is shorter than the years you have left, so the balance is compressed into fewer payments, or when the rate improvement is too small to offset that compression. A shorter term is not necessarily a bad deal, but it is not a cash-flow saving, so break-even is the wrong test for it.
Why can a lower payment still cost me more in the end?
Because resetting the term adds years of interest. Interest accrues on the outstanding balance every month it stays outstanding, so replacing twenty-two remaining years with a fresh thirty-year loan adds eight more years of it. That addition often exceeds everything the lower rate saved. The result on this page shows the interest under each scenario separately and the difference as a signed figure, so a negative saving is visible rather than hidden behind a smaller monthly number.
Should I include the closing costs if they are rolled into the loan?
Yes, enter them as closing costs. Rolling the fees into the balance does not make them disappear; it borrows them at the mortgage rate for the whole term, which costs more than paying them at settlement, not less. This calculator assumes the new loan equals your current balance and the costs are paid up front, so that the break-even figure can be attributed to one variable at a time. Treat a rolled-in quote as slightly optimistic here.
Is a no-closing-cost refinance a better deal?
It is the same deal priced differently. The lender covers the fees and recovers them through a higher interest rate over the life of the loan, so your break-even is immediate but your monthly saving is smaller and your lifetime interest is higher. Run the calculation both ways: once with zero costs at the higher quoted rate, once with the real costs at the lower rate, and compare the lifetime interest figures over the years you actually expect to stay.
How long do I need to stay for a refinance to be worth it?
Longer than the break-even point, with room to spare. If the calculation says thirty-one months and you might move in three years, the margin is too thin to be worth the disruption, since a sale or another refinance stops the clock and any unrealised months of saving simply never happen. As a rule of thumb, look for a break-even comfortably shorter than half the time you confidently expect to keep both the house and the loan.