LOAN REFINANCE CALCULATOR

Loan Refinance Calculator — Break-Even & Savings Analysis

Free US loan refinance calculator. Compare your current loan with a refinance offer to see monthly savings, break-even months, and the true lifetime interest impact — before you commit to closing costs.

1. Current Loan Details

Current Loan Balance ($) Remaining principal on your existing loan.

Current Interest Rate (%)

Remaining Term (Years)

Current Monthly Payment ($) Auto-calculated from balance, rate and term. Override with your actual payment if it includes escrow.

2. New Refinance Offer

New Interest Rate (%)

New Loan Term (Years) Match your remaining term to avoid paying interest for extra years.

Refinance Closing Costs ($)

New Monthly Payment ($)

3. Reference & Notes

Notes

Reference Number

LOAN REFINANCE ANALYSIS

Savings & Break-Even Evaluation

Reference: LR-2026-001

Date:

Loan Balance $250,000.00

Current Rate 6.50%

New Rate 5.50%

                        Monthly Savings
                        $153.00
                    

Break-Even Point 33 Months

Lifetime Net Savings $49,065.00

Side-by-Side Comparison

Current Loan

Monthly Payment $1,687.00

Remaining Term 25 years

Total Remaining $506,100.00

Remaining Interest $256,100.00

New Loan

Monthly Payment $1,534.00

New Term 25 years

Total New Cost $460,200.00

New Interest $210,200.00

Savings Breakdown

Rate Reduction 1.00%

Monthly Savings $153.00

Closing Costs $5,000.00

Interest Saved $45,900.00

Term Change 0 years

Net Lifetime Savings $49,065.00

Break-Even Analysis

Break-Even = Closing Costs ÷ Monthly Savings

$5,000.00 ÷ $153.00 = 33 Months

Reviewing…

Notes

Refinance analysis for mortgage

This calculation is for informational purposes. Actual refinance savings depend on lender terms, credit profile, taxes, insurance, and property details. Review the Loan Estimate and Closing Disclosure with your lender before refinancing.

Prepared By

Date

GUIDE

How to Use This Loan Refinance Calculator

This free loan refinance calculator helps US borrowers decide whether refinancing a mortgage, auto, personal, or student loan makes financial sense. It compares your current loan against a new refinance offer using three metrics that matter: monthly savings, break-even months, and lifetime interest impact. The current payment is auto-calculated from your balance, rate, and term, so you only enter the number if it differs because of escrow. For a broader cost comparison across multiple lenders, try our loan comparison calculator or check the fee-inclusive annual cost with our APR calculator.

Enter Your Current Loan

Enter the current balance, rate, and remaining term. The current monthly payment is calculated automatically but can be overridden if it includes escrow.

Enter the New Offer

Enter the new interest rate, new term, and the total refinance closing costs quoted by your lender.

Review Monthly Savings & Break-Even

See how much you save per month and how many months it takes to recover the closing costs.

Check Lifetime Impact

Compare the total interest paid under both loans, including the impact of a longer or shorter term.

Save, Print or Export

Save a draft in your browser, print the comparison, or download a PDF for your records.

REFINANCE EDUCATION

What Does a Loan Refinance Calculator Calculate?

A loan refinance calculator converts your current loan and a new refinance offer into the three numbers that decide whether the deal makes sense: monthly payment savings, break-even point, and lifetime interest impact. It also exposes a common trap — extending your loan term to lower the monthly payment — by showing exactly how much extra interest you would pay in exchange for that smaller payment.

Key refinance metrics

Monthly Payment Savings: The difference between your current and new monthly payment.
Break-Even Point: Closing costs ÷ monthly savings = number of months to recover the refinance cost.
Remaining Interest (Current): The interest you would pay under your existing loan for the remaining term.
New Interest: The interest you would pay under the refinance offer over its full term.
Interest Saved: Remaining interest minus new interest. Positive means you save on interest; negative means you pay more due to a longer term.
Net Lifetime Savings: Interest saved − refinance closing costs. This is the true bottom-line benefit.
Term Change: How many years the new term adds or removes compared to your remaining term.

Who can use this loan refinance calculator?

Homeowners: Evaluate a mortgage rate-and-term refinance or a cash-out refinance.
Auto Owners: Compare refinancing a car loan to a lower credit-union rate.
Students and Families: Analyze federal consolidation or private student loan refinance offers.
Small Business Owners: Evaluate refinancing an existing SBA or conventional business loan.
Debt Consolidators: See whether combining existing debt into a new loan actually saves money.

METHODOLOGY

Loan Refinance Calculator Methodology

MoneyTool uses standard amortization mathematics for both loans and the standard break-even formula for the payback period. The calculator is transparent about what it does and does not capture.

1. Current monthly payment (auto-calculated)

For a loan with balance P, monthly rate r, and n remaining monthly payments:

M = P × r × (1 + r)ⁿ ÷ ((1 + r)ⁿ − 1)

The current payment is auto-calculated but can be overridden when the user's actual payment includes escrow (taxes and insurance).

2. New monthly payment

Same formula applied to the balance, new rate, and new term. Amortization is fully amortizing and fixed-rate.

3. Interest saved (lifetime impact)

Current remaining interest = (Current monthly payment × current remaining months) − balance

New interest = (New monthly payment × new total months) − balance

Interest saved = Current remaining interest − New interest

This compares the interest you would pay under each loan over its respective term, so a longer term correctly shows more total interest.

4. Break-even point

Break-even months = Closing costs ÷ Monthly savings

If monthly savings are zero or negative, the break-even is undefined (shown as "N/A").

5. Net lifetime savings

Net lifetime savings = Interest saved − Closing costs

This is the true bottom-line benefit of the refinance after accounting for upfront costs. It can be negative if the closing costs exceed the interest savings.

Important assumptions

Both loans are modeled as fixed-rate, fully amortizing monthly installment loans.
Closing costs are paid upfront and reduce lifetime savings dollar-for-dollar.
Taxes, insurance, and HOA fees are not modeled separately — override the current payment if it includes escrow.
Opportunity cost of keeping the old loan, tax deductibility of mortgage interest, and cash-out refinance uses are not modeled.
Variable-rate, interest-only, and balloon structures are not modeled.
This is an educational estimate, not a Loan Estimate or Closing Disclosure under TILA-RESPA.

E-E-A-T & SOURCES

Loan Refinance Information, Sources & Editorial Review

MoneyTool separates calculation results from financial education and lender-specific requirements. The calculator uses documented amortization and break-even mathematics for the refinance estimate, while external lending information should be verified with authoritative sources and the lender offering the refinance.

Author and editorial responsibility

Methodology reviewed by the MoneyTool Finance Expert Team, a group of accountants, CPAs, and personal-finance analysts who maintain MoneyTool's calculator library and financial education content.

Last reviewed: September 2026 | Fixed-rate monthly amortization

Next review: When calculation logic, supported inputs, or relevant guidance changes.

This calculator and its educational content are maintained as part of MoneyTool's finance calculator resource library. Methodology is reviewed when the calculation logic or relevant educational guidance changes.

Authoritative U.S. refinance and mortgage resources

Consumer Financial Protection Bureau (CFPB) — Refinancing: CFPB Refinance Guide explains when refinancing may make sense, how to compare offers, and what to watch for.
Consumer Financial Protection Bureau (CFPB) — Owning a Home: CFPB Owning a Home is the official consumer guide to buying and financing a home in the United States.
CFPB — Loan Estimate Explainer: CFPB Loan Estimate Explainer walks through the standardized form lenders must provide within 3 business days of an application.
CFPB — Interest Rate vs APR: CFPB: Interest rate vs APR explains why APR, not the nominal rate, is the fairest way to compare loan offers.
Federal Housing Finance Agency (FHFA): FHFA is the regulator of Fannie Mae, Freddie Mac, and the Federal Home Loan Banks and publishes conforming loan limits.
U.S. Department of Housing and Urban Development (HUD): HUD Buying a Home provides federal homebuying and housing-counseling resources including FHA loan information.
Federal Trade Commission (FTC) — Mortgages: FTC Mortgage Shopping Guide provides consumer guidance on comparing mortgage offers and avoiding deceptive lending.
MyMoney.gov — Federal Financial Literacy: MyMoney.gov is the US government's central portal for financial literacy and consumer resources.

External resources are provided for education and verification. MoneyTool is not affiliated with or endorsed by the CFPB, FHFA, HUD, FTC, MyMoney.gov, or any lender linked from this page.

SMART REFINANCING

Tips for Smart Refinance Decisions

Refinancing can save thousands — or cost thousands if the timing or structure is wrong. Use break-even analysis, compare total interest, and shop multiple lenders before you commit.

Check Your Credit First

Higher credit scores qualify for lower rates. Check your score before applying so you know what rates to expect.

Shop Multiple Lenders

Within a short window, get quotes from 3–5 lenders. Even a 0.25% difference can save thousands over the loan term.

Get the Full Cost in Writing

Ask each lender for a Loan Estimate so you can compare the APR, closing costs, and monthly payment on the same form.

Watch the Break-Even

If you plan to move or refinance again before the break-even point, the refinance is likely not worth it.

Do Not Just Chase the Payment

A lower monthly payment from a longer term can mean more total interest. Compare lifetime cost, not just the monthly figure.

Read the Fine Print

Check prepayment penalties, rate-lock terms, cash-out restrictions, and any variable-rate provisions before signing.

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📋 Loan Comparison Calculator

Compare multiple loan options side-by-side.

📈 APR Calculator

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📊 Debt-to-Income Ratio Calculator

Calculate DTI to assess loan eligibility.

LEARNING CENTER

Learn More About Refinancing

Continue learning about refinancing, when it makes sense, and how to avoid costly mistakes.

Refinance Guide

Learn when to refinance, how to compare offers, and what to watch out for in the process.

When to Refinance Your Loan

Key indicators that it's the right time to refinance, including rate drops and financial changes.

Understanding Refinance Costs

All the costs involved in refinancing, from application fees to closing costs and prepayment penalties.

FAQ

Frequently Asked Questions About Refinancing

What is loan refinancing?

Refinancing replaces your existing loan with a new one, typically to secure a lower interest rate, reduce the monthly payment, change the loan term, or access equity. The old loan is paid off from the proceeds of the new loan.

When should I refinance?

Consider refinancing when interest rates have dropped meaningfully, your credit score has improved, or your financial situation has changed. Use the break-even calculation to determine whether the savings will exceed the closing costs within the time you plan to keep the loan.

What is the break-even point in refinancing?

The break-even point is the number of months it takes for your monthly savings to recover the closing costs of refinancing. If you plan to stay in the loan longer than the break-even period, refinancing is typically worth it.

How much does refinancing cost?

Refinance closing costs typically range from 2% to 5% of the loan amount and include origination fees, appraisal fees, title search, title insurance, and recording fees. Some lenders offer no-closing-cost refinances in exchange for a slightly higher rate.

Does extending the loan term affect my savings?

Yes. A longer term lowers the monthly payment but usually increases the total interest paid over the life of the loan. Always compare both the monthly savings and the lifetime interest cost before deciding.

Is this loan refinance calculator free?

Yes. MoneyTool provides this loan refinance calculator free for educational and planning use.

Can I save my refinance analysis?

Yes. Save Draft stores the calculator inputs in your browser. Print Results and Download PDF can be used to keep a copy of the displayed analysis.

LEGAL

Loan Refinance Calculator Disclaimer

This loan refinance calculator provides estimates for informational and educational purposes. It does not constitute financial, legal, tax, accounting, lending, or investment advice. Actual refinance rates, fees, closing costs, repayment schedules, eligibility requirements, and disclosures vary by lender, product, jurisdiction, and borrower.

Estimates only: Results depend on the inputs and assumptions described in the methodology.
Not a Loan Estimate: Official Loan Estimates and Closing Disclosures are issued by the lender under TILA-RESPA rules.
No approval decision: The calculator does not assess or guarantee refinance eligibility or approval.
Verify before refinancing: Review the lender's Loan Estimate and final closing documents before committing to a refinance.

Last methodology review: September 2026. Calculator logic and educational content should be reviewed again whenever the methodology, supported inputs, or relevant external guidance changes.