Refinance Calculator
Decide if refinancing makes sense with our Refinance Calculator. Enter your current loan balance, interest rate, and monthly payment, along with the new loan terms and closing costs to see if refinancing will save you money. Perfect for mortgage refinancing, student loan refinancing, or any loan refinance decision. The calculator shows your new monthly payment, monthly savings, break-even point, and total savings over the loan term. All calculations happen instantly in your browser with no data storage.
How it works: Enter your current loan details and new loan terms to see if refinancing makes financial sense. The calculator shows monthly savings, break-even point, and total savings over the loan term.
What Is a Refinance Calculator?
A refinance calculator helps you decide whether replacing your current loan with a new one makes financial sense. It computes your new monthly payment at the lower rate, the monthly savings, and the break-even point — the month when cumulative savings exceed the closing costs you paid to refinance. If you plan to keep the loan longer than the break-even, the refinance saves money. If you expect to move or pay off the loan before break-even, the upfront costs aren't recovered and the refinance costs you money.
How to Use a Refinance Calculator
Enter your current loan balance, remaining term, and current interest rate. Then enter the new rate being offered and estimated closing costs (typically 2–5% of the loan for mortgages; usually minimal for auto loans). The calculator computes: (1) old vs. new monthly payment, (2) monthly savings, (3) break-even month, (4) total interest saved over the remaining life of the loan. If the break-even is longer than your expected stay, hold off.
Worked Example: The Garcias Refinance Their Mortgage
The Garcias have a $285,000 balance on a 30-year mortgage at 7.25%, with 23 years remaining. Current monthly P&I: $1,944. Their lender offers a 5.75% rate with $5,200 in closing costs.
New monthly payment: $1,664 (savings: $280/month)
$285,000 | 5.75% | 30 years (resetting term)
Break-even: $5,200 ÷ $280 = 19 months
If they stay 10+ years, total interest savings exceed $67,000 — despite resetting the 30-year clock.
Note on term reset: Resetting from a 23-year remaining term to a new 30-year saves cash flow, but extends payoff by 7 years. Compare both scenarios — refinancing to a 20-year at 5.75% cuts the payment to $1,974 (only $30 savings) but eliminates 3 years and saves $80,000 in total interest.
Refinance Decision Reference Table
| Scenario | Verdict | Why |
|---|---|---|
| Rate drop ≥ 1%, staying 5+ years | Strong yes | Closes within 18–24 months; years of savings ahead |
| Rate drop 0.5%, staying 2 years | Probably no | Break-even likely exceeds planned horizon |
| Rate drop, switching 30yr → 15yr | Yes (if affordable) | Higher payment, but massive total interest reduction |
| Cash-out refi to pay off credit cards | Caution | Extends secured debt; risk of re-accumulating unsecured debt |
| ARM → Fixed during high-rate period | Rate dependent | Locks certainty; evaluate if rate is acceptable long-term |
| No-cost refi (rate slightly higher) | Sometimes yes | No break-even concern; check long-term net savings |
Key Concepts: Break-Even, Closing Costs, Rate-Term vs Cash-Out
Break-even point = Total closing costs ÷ Monthly payment savings. This is the number of months you must stay in the loan before the refinance pays off. Rate-and-term refinance changes only the rate and/or term with no cash extracted — the simplest and most straightforward. Cash-out refinance increases the loan balance to extract equity, effectively converting home equity to cash; it resets interest accumulation on the larger balance.
No-cost refinance: Lenders can offer $0 closing costs by slightly increasing the rate (0.125–0.25% higher). This eliminates the break-even concern but results in slightly higher lifetime interest. It’s a good option if you're unsure how long you'll hold the loan.
Is It Worth Refinancing Right Now? Tips for 2024–2025
The classic rule of thumb is to refinance if you can drop your rate by 1%+ and plan to stay long enough to recoup costs. But also consider: (1) your remaining term — refinancing in the last 5 years of a 30-year mortgage often makes little sense since you’re in the principal-heavy phase; (2) your credit score — a score improvement since origination can unlock better rates than you originally qualified for; (3) PMI removal — if your home value has increased to give you 20% equity, a refinance removes PMI, often worth $100–$200/month even at the same rate.
Frequently Asked Questions About Refinancing
How much does it cost to refinance a mortgage?
Mortgage refinance closing costs typically run 2–5% of the loan balance. On a $300,000 mortgage, expect $6,000–$15,000 in fees (appraisal, title, lender origination, recording, prepaid interest). Some lenders offer no-cost options that roll fees into a slightly higher rate instead.
How long does a refinance take?
A mortgage refinance typically takes 30–45 days from application to closing. Auto loan refinances often close in 1–2 weeks. Having documents ready (pay stubs, tax returns, current loan statement) speeds up the process significantly.
Should I refinance to remove PMI?
If your home has appreciated to 80% LTV (or you’ve paid down to that level), refinancing can remove PMI. At $150/month in PMI savings, even a modest closing cost of $3,000 breaks even in 20 months. Request a new appraisal to confirm current value.
Does refinancing hurt your credit score?
Yes, briefly. The hard inquiry drops your score 5–10 points. The new account lowers average account age. However, if you lower your monthly payment and stay current on all obligations, your score typically recovers within 6–12 months.
Can I refinance if my home value has dropped?
Conventional refinancing requires sufficient equity (typically 5–20% depending on lender). If you’re underwater (owe more than the home’s value), you may qualify for HARP-successor programs or an FHA Streamline Refinance. Check with HUD-approved lenders.
What is the best time to refinance?
When rates have dropped at least 0.5–1% below your current rate, your credit score has improved since origination, you have 5+ years remaining on the loan, and you plan to stay at least as long as the break-even period. Also consider refinancing when equity reaches 20% to eliminate PMI.