Most refinance advice hands you one formula — closing costs divided by monthly savings — and calls the result your break-even point. That formula answers a real question, but it is not the question that decides whether you come out ahead. There is a second test, the total-cost comparison, and on realistic numbers the two tests can give opposite answers: the payment test says “yes, obviously,” while the total-cost test shows the refinance quietly losing money. This page works one scenario all the way through both tests, explains why they disagree, and then covers the situations where refinancing is the right move even when the arithmetic says no.
General information, not financial advice. Figures in the worked example are computed from the stated inputs using the standard amortization formula. Your lender’s quotes and your note’s terms govern your decision.
Divide the upfront cost of refinancing by the monthly payment saving:
Break-even (months) = closing costs ÷ monthly savings
It tells you how long until the lower payments have repaid what the refinance cost you. It is the method most lender and comparison content teaches (BestMoney’s version is typical), and it is not wrong — it is incomplete. It treats a dollar of payment reduction as a dollar saved, which is only true if the two loans run for the same remaining time.
Fordham Capital’s “math first” method asks the harder question: what will each path cost you in total from today?
Cost of staying = the total interest left on your current loan. Cost of refinancing = the new loan’s total interest + closing costs + any prepayment penalty on the old loan.
If the second number is bigger, the refinance loses money — no matter how much smaller the monthly payment feels. The reason it so often is bigger has a name: the term restart. Refinancing usually starts a brand-new term, so a loan you were four years from finishing becomes a loan you are five or more years from finishing. You pay less each month largely because you pay for more months.
Your current loan: $200,000 balance at 11%, with 48 months left. Payment: $5,169.10/month. Interest still to come if you simply finish it: $48,117.02.
The refinance offer: 8.5%, but over a new 60-month term, with $4,000 in closing costs. New payment: $4,103.31/month — a saving of $1,065.80/month.
Run Test 1: $4,000 ÷ $1,065.80 ≈ 3.75 months to break even. A rate cut of 2.5 points, a payment down over a thousand dollars, break-even inside a quarter — this looks like the easiest yes in borrowing.
Run Test 2: the new loan’s total interest over its 60 months is $46,198.38. Add the $4,000 closing costs: $50,198.38. Compare with the $48,117.02 it costs to finish the old loan. The refinance loses $2,081.36. You would pay more, in total, for the loan with the lower rate and the lower payment — because the clock restarted from 48 months to 60, and twelve extra months of payments quietly ate the rate cut and then some.
The lesson in one sentence: payment break-even answers “when do I feel ahead?”; total cost answers “am I ahead?” And the fix is visible in the same numbers — take the identical offer over 48 months instead of 60, matching the term you have left: the payment is $4,929.66, total interest is $36,623.71, and even after the $4,000 of costs you come out $7,493.31 ahead on both tests. The rate cut was real all along; the term restart was the trap. Model your own pair of offers in the business loan calculator and the amortization calculator, and compare where today’s market sits on the average rates page.
Total cost is the default test, not the only consideration. Refinancing can be the right move even when Test 2 says no, when the point is something other than interest savings (ClearValue’s and Fordham’s sign lists cover the same ground):
The common thread: refinance for a reason you can name, priced with Test 2 — not because a payment quote looked smaller.
Before running either test, pull four numbers: the prepayment penalty on your current loan, if any (the structures — and the SBA 5/3/1 rule — are in our prepayment penalties guide); the closing costs on the new loan, commonly in the same 2–5%-of-loan territory as other closing charges (see business loan costs and fees); the months remaining on your current loan; and the new loan’s full term — the input that decides whether Test 2 passes. Missing any one of the four makes both tests fictional.
How do you calculate the break-even point on a refinance? Two ways, and you should run both (Fordham Capital’s method). The payment break-even is closing costs divided by the monthly payment saving — in the example above, $4,000 ÷ $1,065.80 ≈ 3.75 months. The total-cost break-even compares the interest remaining on your current loan against the new loan’s total interest plus all refinance costs, including any prepayment penalty. If the new loan’s term is longer than the time left on your old one, the two methods can disagree — trust the total-cost figure.
How much should rates drop before refinancing? One widely-cited heuristic is a drop of about 200 basis points (2 percentage points) (ClearValue) — a rule of thumb, not a rule. Our worked example shows why no rate gap alone settles it: a 2.5-point cut lost money once the term restarted from 48 to 60 months, while the same cut at a matched 48-month term saved $7,493.31. Run the total-cost test on your actual quotes instead of shopping by the gap.
When does refinancing NOT make sense? When the total-cost test fails and none of the non-price reasons apply: the new term stretches well beyond your remaining term, closing costs and a prepayment penalty eat the rate saving, or you plan to sell the business or repay the loan soon anyway — a refinance you exit within the break-even window is a cost with no recovery. If break-even stretches beyond about five years, ClearValue’s guidance is simply not to do it.
General information, not financial advice. Sources: Fordham Capital “Math First Refinance” (total-cost method); ClearValue (rate-drop heuristic, don’t-refinance conditions); BestMoney (payment break-even method); PNC; Avana (CRE break-even inputs). Worked example computed from the stated inputs. Currency verified 2026-10-23.