Compare your current loan to a new refinanced loan — see your monthly savings, break-even point on closing costs, and lifetime interest savings.
Enter Your Loan Details
Fill in your current loan and the new refinance terms, then click Calculate Refinance.
A refinance calculator compares your current loan — mortgage, auto, or personal — against a new refinanced loan, so you can see whether switching actually saves you money once closing costs are factored in. It's built for borrowers who've been offered a lower rate and want to know if it's really worth it, not just whether the monthly payment looks smaller. This break-even refinance calculator turns that question into two hard numbers: how many months it takes to recoup your closing costs, and how much you'd actually save (or lose) over the life of both loans.
Enter your current loan's remaining balance, rate, and remaining term — the calculator auto-computes your current monthly payment, which you can override if your actual statement payment differs. Then enter the new loan's rate, term, closing costs, and any cash-out amount you want to borrow against your equity. The calculator computes your new monthly payment using the standard amortization formula on the new principal (remaining balance plus cash-out), then fully amortizes both the current loan (over its remaining term) and the new loan (over its new term) to compare real total interest costs, not just the headline payment.
This tool is for homeowners who've received a refinance offer or noticed rates have dropped, auto loan borrowers checking whether a dealer or bank refinance offer is worth the paperwork, and anyone considering a cash-out refinance to access equity. It's equally useful for a quick "is this worth it?" gut check and for a detailed side-by-side comparison before signing new loan documents.
A lower monthly payment doesn't always mean a better deal — refinancing resets your amortization clock, and stretching back out to a long term can mean paying more total interest even at a lower rate. This calculator's break-even point tells you exactly how many months of savings it takes to recoup your closing costs, and the lifetime interest savings figure nets those costs against the true interest difference over the life of both loans, so you can see the full picture before committing to a should-I-refinance decision.
Break-even compares upfront closing costs against ongoing monthly savings
The number of months it takes your monthly savings to fully offset the closing costs you paid to refinance. Staying in the loan past this point is where refinancing starts to pay off.
Adding a Cash-Out amount increases your new loan's principal above your current balance, giving you the difference in cash — but it also increases your new payment and total interest.
Refinancing restarts your loan's amortization clock. Even at a lower rate, extending back out to a long term can raise your total lifetime interest despite a lower monthly payment — always check both numbers.
Rather than just comparing rates, the calculator amortizes both the current loan (over its remaining term) and the new loan (over its new term) in full to compute true total interest on each.
From your current loan to a break-even date in under a minute
Input your remaining balance, current interest rate, and remaining term. The calculator auto-computes your current monthly payment — override it with your actual statement payment if escrow or extra principal makes it differ.
Input the interest rate and term offered on the refinanced loan. It doesn't need to match your remaining term — you can shorten or extend it.
Enter the total upfront fees to refinance from your Loan Estimate, plus any extra amount you want to borrow on top of your remaining balance.
The calculator computes your new monthly payment, fully amortizes both the current and new loan, and works out your break-even point and lifetime interest savings.
Check the break-even month and date, monthly savings, and lifetime interest savings net of closing costs — plus the current-vs-new chart and cumulative savings line — before deciding whether to refinance.
The calculator's own default scenario, computed step by step
A $250,000 remaining balance at 6.75% with 25 years left, refinanced into a new 25-year loan at 5.75%, with $4,000 in closing costs and no cash-out.
| Metric | Current Loan | New Loan |
|---|---|---|
| Monthly Payment | $1,727.28 | $1,572.77 |
| Month 1 Interest | $1,406.25 | $1,197.92 |
| Month 1 Principal | $321.03 | $374.85 |
| Total Interest (full term) | $268,183.64 | $221,829.80 |
Explanation: Even though the rate only drops by a full percentage point (6.75% to 5.75%), the monthly savings of $154.51 recoups the $4,000 closing costs in a little over two years — well within a typical multi-year mortgage holding period. Because both loans use the same 25-year term here, there's no amortization-reset penalty: the $42,353.84 in lifetime savings reflects a genuinely cheaper loan, not a shorter-term illusion. If the new loan had instead reset to a fresh 30-year term, the lower monthly payment would look even better, but total interest paid could rise instead of fall — always check both numbers side by side.
What your break-even point actually tells you about a refinance decision
The break-even point — how many months it takes your monthly savings to repay your closing costs — is the single most useful number for judging a refinance, because it directly answers "how long do I need to keep this loan for the switch to pay off?"
| Break-Even Point | General Read | Typical Context |
|---|---|---|
| Under 24 months | Strong case for refinancing | Large rate drop, low closing costs, or both |
| 24 – 48 months | Worth it if you're staying put | Typical mortgage or auto refinance with moderate savings |
| Over 48 months | Only worth it for long holders | Small rate drop, high closing costs, or a short remaining term |
If you plan to move or pay off the loan soon: compare your expected timeline against the break-even point. Refinancing rarely makes sense if you'll sell, move, or pay off the loan before you cross that threshold, no matter how attractive the new rate looks.
If lifetime interest savings is negative: even with positive monthly savings, a longer new term can produce a negative lifetime savings figure once closing costs and the extended amortization schedule are factored in. Treat lifetime savings, not just monthly savings, as the deciding number for a long-term hold.
If there's no break-even point: when the new payment isn't lower than the current one, the calculator can't compute a break-even from monthly savings alone. In that case, weigh the lifetime interest figure and any cash-out amount instead — refinancing can still make sense to shorten your term or access equity even without a lower payment.
This tool provides general financial estimates for educational purposes only and does not constitute personalized financial advice. Actual lender quotes, fees, underwriting terms, and closing costs will vary — confirm final figures with your lender before committing to a refinance.
Where this refinance calculator earns its keep
Check whether a lower advertised rate actually beats your current loan once fees are included.
Compare a new auto loan offer against your current car payment after a credit score improvement.
See exactly how much a cash-out amount raises your new payment and total interest.
Weigh a zero-fee refinance with a slightly higher rate against paying costs upfront.
Model refinancing into a shorter term to build equity faster despite a higher payment.
Compare your expected time in the home or loan against the break-even point before committing.
Apply the same break-even math to any fixed-rate installment loan, not just a mortgage.
Run multiple lenders' quoted rates and fees through the calculator to find the best break-even.
What this refinance calculator does well, and where it can't replace professional advice
Quick-reference comparison of common refinance approaches
| Feature | Rate-and-Term Refinance | Cash-Out Refinance | No-Closing-Cost Refinance |
|---|---|---|---|
| Goal | Lower rate and/or change term | Access equity as cash | Avoid upfront fees |
| New principal | Same as remaining balance | Remaining balance + cash-out | Same or fee-inflated balance |
| Upfront cost | Closing costs paid in cash | Closing costs paid in cash | $0 upfront, rolled into rate/balance |
| Monthly payment | Usually lower | Often higher due to larger principal | Often slightly higher than rate-and-term |
| Best for | Long-term holders chasing rate savings | Funding renovations, debt consolidation | Short-term holders who won't reach normal break-even |
Common questions about loan refinancing
Official guidance to complement this calculator — not a substitute for licensed financial advice
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