"It doesn't make sense to refinance — I've already paid on this loan for 3 years." We hear this all the time. And we understand why it feels that way. But the math tells a different story — and this calculator shows you exactly what that story is.
The Loan Comparison Calculator compares your current loan and a new loan proposal on a true apples-to-apples basis — starting from your remaining balance today, not your original loan amount. Enter your numbers below and see the real savings side by side, month by month.
📈 Loan A vs. Loan B — Side-by-Side Comparison Calculator
Enter your current loan details and the new proposal — the full comparison updates instantly
Cumulative Savings at Key Milestones
| Mo. | Loan A — Current | Loan B — New | Comparison | |||||
|---|---|---|---|---|---|---|---|---|
| Payment | Interest | Balance | Payment | Interest | Balance | Cum. Savings | Status | |
Ready to see your real numbers? Kirk or Ken will run this comparison with your exact loan details — free, same day, no obligation.
Get My Real Rate Quote →Why "I've Already Paid X Years" Is the Wrong Way to Think About Refinancing
This is the single most common objection we hear from homeowners considering a refinance — and it is completely understandable why it feels right. The logic seems obvious: "I've already paid 3 years of interest. If I refinance to a new 30-year loan, I'm starting over and paying even more interest."
Here is why that logic is wrong — and why the calculator above proves it.
The Key Insight — Your Remaining Balance Is What Matters
When you refinance, you are not refinancing your original loan amount. You are refinancing your current remaining balance. After 3 years of payments on a $350,000 loan, your remaining balance might be $335,000. That $335,000 is what gets refinanced — not $350,000.
The calculator above compares both loans starting from that same remaining balance. Loan A continues at your current rate on your remaining balance. Loan B starts fresh at the new rate on the same remaining balance. That is a true apples-to-apples comparison — and it is the only comparison that actually tells you whether refinancing makes financial sense.
The Three Objections — And the Math That Answers Each One
Sometimes true — sometimes not. It depends on your specific rates, balances, and how long you stay in the home. The milestone table in the calculator above shows you exactly how much total interest each loan costs at 12, 36, 60, and 120 months. For most homeowners comparing a 7%+ current loan to a new loan in the 6% range, the new loan produces meaningful savings even over a full 30-year horizon. Run your actual numbers and let the math decide — not the intuition.
Closing costs are real — but they need to be compared to your monthly savings, not evaluated in isolation. At First Commerce Financial we charge zero junk fees — which meaningfully reduces your closing costs and shortens your break-even timeline. The break-even month in the calculator shows you exactly when you start winning. If you plan to stay past that month, refinancing makes financial sense. If you are moving before then, it may not. That is the honest answer — and the calculator gives you the honest number.
If you have 5–8 years left on your loan, refinancing to a new 30-year term almost certainly does not make sense — you are right. But refinancing to a shorter term that matches your remaining timeline might. A 5-year or 7-year term at a lower rate could reduce your monthly payment AND your total interest without extending your payoff date at all. Run the comparison with your real remaining term in both fields and see what the math shows.
How First Commerce Financial Uses This Tool
When a client calls us about a potential refinance, this is the first thing we do — run a side-by-side amortization comparison using their real loan numbers. Not a rule of thumb. Not a "you need to drop your rate by 1%" guideline. The actual math, with their actual balance, their actual rate, and the actual rate we can get them through our wholesale lender network.
Zero Junk Fees Changes the Break-Even Math
Most lenders charge $2,000–$4,000 in junk fees — processing fees, underwriting fees, administrative fees — on top of legitimate closing costs. These inflate your break-even point and make refinancing look less attractive than it actually is.
At First Commerce Financial we charge zero junk fees. On a typical refinance, eliminating $2,000 in junk fees moves your break-even point from month 24 to month 12 — getting you into savings territory twice as fast. Enter $0 in the closing costs field on Loan B and compare it to what your current lender would charge to see exactly what our zero junk fee commitment is worth to you.
Frequently Asked Questions
Should I use my original loan amount or my current balance?
Always use your current remaining balance — not your original loan amount. Your original loan amount is irrelevant to the refinance decision. What matters is what you owe today and what that balance costs you at your current rate versus a new rate. Your mortgage statement shows your current balance. Call your lender for an official payoff quote — it will be slightly higher than your statement balance due to per diem interest.
What loan term should I choose for Loan B?
It depends on your goals. A new 30-year term gives you the lowest monthly payment but may cost more in total interest. A term matching your remaining years (e.g. 27 years if you have 27 years left) keeps your payoff date the same while potentially lowering your rate and payment. A shorter term (e.g. 15 years) raises your payment but saves significantly on total interest and builds equity faster. Run the calculator with each option to see what the numbers look like for your situation.
What if my new loan amount is slightly higher than my remaining balance?
This happens when you roll closing costs into the loan rather than paying them upfront. Enter the actual new loan amount in Loan B — including any rolled-in costs — for an accurate comparison. This is a legitimate strategy that eliminates out-of-pocket costs at closing at the expense of a slightly higher loan balance and monthly payment. The calculator will show you the real trade-off.
Is the monthly savings the most important number?
Monthly savings matters — but it is not the only number that matters. Total interest paid over the life of each loan is equally important, especially if you plan to stay in the home long-term. The cumulative savings at 60 and 120 months tells you how much you are ahead (or behind) at those points. For most homeowners comparing a 7%+ current loan to a new 6% range loan, both the monthly savings AND the total interest picture favor refinancing.
How do I know what rate I can actually get?
The rate in the calculator is just for planning. Your actual rate depends on your credit score, loan-to-value ratio, loan amount, property type, and current market conditions. As an independent mortgage broker we shop dozens of wholesale lenders to find the lowest rate available for your specific scenario — not just whatever one bank is offering that day. Call us and we will give you a real rate quote in minutes, with zero obligation and zero junk fees.
Run Your Real Numbers With Kirk or Ken
The calculator above gives you a powerful planning tool. But your actual refinance quote — with your real credit profile, your real property, and our real wholesale rates — tells you definitively whether refinancing makes sense. That conversation is free, takes 10 minutes, and comes with zero pressure and zero junk fees.
Get My Free Rate Quote