Should I Refinance? (August 2026)
Refinancing is worth it when a lower rate repays your closing costs before you sell or pay off the loan. Here is the break-even rule, walked through with today's real credit union refinance rates — no forecasts, no affiliate bias.
Whether you should refinance comes down to one number: break-even months = closing costs ÷ monthly savings. As of August 20, 2026, the median 30-year fixed refinance rate across 440 credit unions is 6.692% APR (lowest 5.250%). If your current rate sits meaningfully above that — enough that a lower payment repays your closing costs well before you plan to move or pay off the loan — refinancing is generally worth it. If break-even lands past the point you'd sell, keep your current loan.
Source: RateAPI.dev1. Today's Rate
What You Could Refinance Into
30-year fixed refinance rates from 440 credit unions, verified August 20, 2026
Median is the true median of ranked APRs, not an average. The gap between your current rate and this band is what determines whether refinancing pays off. See current mortgage rates for the full national picture.
2. The Rule
The Break-Even Rule
One number decides it
A refinance replaces your loan with a new one at a lower rate — but it costs money to do (lender fees, appraisal, title, and other closing costs). So the question is never just “is my new rate lower?” It is “how long until the lower payment pays back what the refinance cost me?” That is the break-even point:
break-even months = closing costs ÷ monthly savings
Monthly savings is the difference between your payment at your current rate and your payment at the new rate, computed on the same balance and remaining term. If break-even lands comfortably inside the time you plan to keep the loan, refinancing is worth it. Everything past break-even is net savings; everything before it, you are still repaying the cost of the refinance. This is exactly how RateAPI's refinance_break_even tool computes the answer — against the best qualifying real credit union refinance offer, not a national average.
3. Worked Example
A Worked Example
Illustrative — using today's live median rate as the refinance rate
This example uses a $300,000 balance, a 7.690% current rate, and $6,000 in closing costs, refinancing into today's median rate of 6.692%. Your own numbers — balance, remaining term, current rate, and closing costs — change the break-even entirely. Run yours in the refinance break-even calculator.
4. The Decision
When Refinancing Makes Sense — and When to Keep Your Loan
Refinancing likely makes sense when
- Your break-even lands well before you plan to move or pay off the loan
- Your current rate is meaningfully above today's best available refinance rate
- Your loan balance is large, so a rate drop produces bigger monthly savings
- You can keep the loan long enough to clear the closing costs and bank net savings
- You want to shorten your term and can afford the higher payment of a 15-year loan
Keeping your current loan is usually better when
- Break-even lands past the point you expect to sell or pay off the loan
- Your rate is already at or below today's market band
- Closing costs are high relative to the monthly savings on your balance
- You are far into an amortization schedule and restarting resets your interest curve
- You plan to move soon — you may never reach break-even
5. Methodology
How RateAPI Computes Your Break-Even
RateAPI resolves the best qualifying credit union refinance offer for your state, computes your new payment at that rate, and compares it to your current payment on the same balance and term. The numbers are ranked by true cost — APR inclusive of points and fees — with zero affiliate placement.
- Payment math: fully-amortized monthly payment, M = P·r / (1 − (1+r)−n)
- Monthly savings: current payment − new payment, at the same balance and term
- Break-even months: closing costs ÷ monthly savings, rounded up
- Net lifetime savings: (monthly savings × term) − closing costs
- Market rate: best qualifying live credit union refinance offer, ranked by APR + fees
- No forecasts: we compare your rate to real current offers; we never predict future rates
This logic ships three ways: the refinance_break_even MCP tool at mcp.rateapi.dev/mcp, the POST /v1/refinance-break-even REST endpoint, and the borrower-facing refinance break-even calculator. For definitions, see the rate glossary and our methodology.
FAQ
Frequently Asked Questions
Common questions about the refinance decision
Whether you should refinance comes down to one number: break-even months = closing costs ÷ monthly savings. As of August 20, 2026, the median 30-year fixed refinance rate across 440 credit unions is 6.692% APR (lowest 5.250%). If your current rate sits meaningfully above that — enough that a lower payment repays your closing costs well before you plan to move or pay off the loan — refinancing is generally worth it. If break-even lands past the point you'd sell, keep your current loan.
Break-even is the number of months it takes for your monthly savings to recover the closing costs you pay to refinance. It equals closing costs divided by monthly savings, rounded up. Below the break-even point you are still paying back the cost of refinancing; past it, every month is net savings. If break-even lands comfortably inside the time you plan to keep the loan, refinancing generally makes sense.
There is no fixed threshold — it depends entirely on your balance, remaining term, and closing costs, because those drive the break-even. A larger balance produces bigger monthly savings from the same rate drop, so it breaks even faster. Rather than a rule of thumb, run your actual current rate, balance, term, and closing costs through the break-even math against today's best real refinance rate.
"Good time" is specific to your loan, not the market. The relevant fact is the gap between your current rate and what you could refinance into today. As of August 20, 2026, the median 30-year fixed credit union refinance rate is 6.692% APR, with the lowest tracked at 5.250%. If your rate is above that band, check your break-even; if it is already at or below it, there is little to gain. RateAPI does not forecast rates — it compares your rate to real, current offers.
Not necessarily — closing costs simply set how long break-even takes. RateAPI divides your closing costs by your monthly savings to get break-even months, then subtracts them from lifetime savings to get net lifetime savings. When closing costs are zero (some no-cost refinances), break-even is immediate. When they are high, you need to keep the loan long enough to clear them.
Yes. The refinance_break_even MCP tool and the POST /v1/refinance-break-even endpoint take your state, product type, balance, term, current rate, and closing costs, then return break-even months, monthly savings, lifetime savings, net lifetime savings, and the best qualifying credit union refinance rate driving the numbers. A free API tier is available.
Run Your Own Break-Even
Compute break-even months, monthly savings, and net lifetime savings against the best real credit union refinance rate for your state. Free API tier available.