Finance & Business· 4 min read

Refinance Calculator: Compare Old vs New Mortgage Costs

Enter your current and new mortgage terms to see monthly savings, break-even point and total cost difference over the life of the loan.

By EasyFinance Team Last updated: 2026-08-23

What Is Mortgage Refinancing?

Refinancing a mortgage means replacing your existing home loan with a new one that has different terms — typically a lower interest rate, a different loan duration or both. The goal is usually to reduce monthly payments, shorten the loan term or save on total interest paid. The EasyFinance Refinance Calculator compares your current loan against a proposed new loan and tells you exactly how much you save, when you break even on closing costs and whether refinancing makes financial sense.

See it in action

Inputs You Need

InputDescriptionExample
Current balanceRemaining principal on your existing loan`$200,000`
Old interest rateAnnual rate on your current mortgage`6.5%`
New interest rateRate offered on the refinance`5.0%`
Remaining termMonths left on your current loan`300 months`
New termTerm of the new loan`360 months (30 yr)`
Closing costsEstimated costs to close the refinance`$4,000`

Understanding the Results

The calculator produces three key numbers. Monthly savings shows the difference between your current and new monthly payments. Break-even months tells you how long it takes for cumulative monthly savings to cover the closing costs. Total cost difference shows whether you pay more or less in total over the full life of each loan. A positive number means you save money overall; a negative number means the new loan costs more in the long run despite lower monthly payments.

What Is Break-Even and Why It Matters

Break-even is the point in months where your cumulative monthly savings equal the closing costs you paid to refinance. If closing costs are $4,000 and you save $150 per month, break-even is about 27 months. If you plan to sell or move before 27 months, refinancing costs you money. If you stay longer, you come out ahead. This single number is the most important factor in the refinance decision.

If your break-even is longer than your expected time in the home, do not refinance — the closing costs will not be recovered.

Shorter Term vs Lower Rate

Refinancing offers two main strategies. Lowering your rate while keeping the same term reduces both monthly payments and total interest. Shortening the term (e.g., 30-year to 15-year) raises monthly payments but saves dramatically on total interest. The calculator lets you explore both scenarios. A common middle ground is refinancing to a lower rate on the same remaining term, which gives you both lower payments and less total interest.

Understanding Closing Costs

Closing costs on a refinance typically range from 2% to 5% of the loan amount. On a $200,000 refinance, expect $4,000 to $10,000. These include appraisal fees, title insurance, origination fees, credit report fees and recording fees. Some lenders offer a no-closing-cost refinance by rolling the costs into the loan balance or charging a slightly higher rate — compare both options in the calculator.

When Refinancing Makes Sense

Interest rates have dropped at least 0.75% below your current rate

Your break-even point falls well within your expected time in the home

You can reduce your term without significantly increasing monthly payments

You want to switch from an adjustable-rate to a fixed-rate mortgage

Your credit score has improved enough to qualify for better rates

When Refinancing Does Not Make Sense

You plan to sell the home before reaching the break-even point

The rate reduction is too small to justify closing costs

You have already paid down a significant portion of the loan (resetting the amortization schedule increases total interest)

You are extending the term to lower payments, which increases total cost substantially

Closing costs are higher than what you would save over the remaining loan life

The Amortization Reset Trap

When you refinance to a new 30-year loan after already paying 5 years on your current mortgage, the amortization clock resets. In the early years of any mortgage, most of your payment goes to interest. By resetting, you push more payments back into the high-interest portion of the schedule. The calculator accounts for this — always check the total cost difference, not just monthly savings.

Frequently Asked Questions

Q: What is break-even?


A: The number of months until your monthly savings cover the closing costs. If you will move or sell before break-even, refinancing does not pay off.


Q: Should I extend the term?


A: Extending the term lowers monthly payments but increases total interest. Shortening raises payments but saves significant interest. Match the new term to your goals.


Q: What are typical closing costs?


A: 2-5% of the loan amount. $4,000 on a $200,000 refinance is typical. Shop around — costs vary significantly by lender.


Q: Is refinancing worth it for a small rate drop?


A: Generally worth it if you will save more in interest than closing costs over your expected time in the home. The break-even calculation tells you exactly when.


Q: Is my data uploaded?


A: No — all math runs locally in your browser.

Need help using this tool?

Read our complete Refinance Calculator tutorial for step-by-step guidance.

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