2026-09-21 7 min read

Refinance Break-Even Calculator

The month a refinance pays for its own closing costs for a mortgage. Live calculator with worked steps, charts.

Calculator

Current Loan Balance Help

The payoff balance today, not the original amount borrowed.

Current Interest Rate(%)

Remaining Term Today(years)

years

New Interest Rate(%)

New Loan Term(years)

years

Closing Costs

This refinance calculator runs on the standard amortisation model: interest is charged on the outstanding balance each month, and anything extra you enter is applied to principal immediately.

Results

Optimal

Monthly Payment Saving

$314

Break-Even Point

16.5 months

Costs recovered by month 17.

Net Lifetime Saving

-$17,186

After closing costs.

Payment Before

$1,737.79/month

Payment After

$1,423.53/month

Closing Costs

$5,200

Interest If You Keep the Loan

$260,484

Interest After Refinancing

$272,470

Verdict

Worth doing

Live results update as you type — currently showing monthly payment saving of $314 on 12 payments a year. Replace the defaults with your own quote for an exact comparison.

Visualizations

Payment Before vs After

1,738Before

1,424After

Cumulative Saving vs Costs

Formula

A refinance replaces the balance with a new loan at the new rate and term. The saving per month is the difference between the old payment and the new one (plus the term effect), and the break-even is closing costs divided by that saving. Below 24–36 months of expected holding, most refinances do not pay.

See the worked steps below for the exact relationship used

Variables

Symbol	Name	Unit	Description
A	Amount	currency	Balance or amount involved in the calculation
i	Periodic rate	decimal	Annual rate ÷ periods per year
n	Number of periods	count	Term in payments

Explanation

Step-by-Step Calculation

Follow each step to understand how the result is calculated from your inputs.

Step 1

Price the payment before and after the change, each on its own term.

P = A × i ÷ (1 − (1 + i)^−n)

Before:7.10% / 24y

After:5.90% / 30y

Result: $1,737.79 → $1,423.53

Step 2

Divide the upfront cost by the monthly saving.

Break-even months = costs ÷ saving

Intermediate: $5,200 ÷ $314.26

Result: 16.5 months

Step 3

Check the lifetime position after costs.

Net = old interest − new interest − costs

Result: -$17,186 lost

Final Answer

$314

Worked Examples

See how the calculator works with different scenarios.

Scenario

The refinance break-even calculator run on the values above, showing the full calculation path rather than only the answer.

Inputs

Balance:240000

Current Rate:7.1

Calculation

1. Price the payment before and after the change, each on its own term. → $1,737.79 → $1,423.53 2. Divide the upfront cost by the monthly saving. → 16.5 months 3. Check the lifetime position after costs. → -$17,186 lost

Result

Monthly Payment Saving: $314

Interpretation

Saving $314.26/month against $5,200 of costs breaks even at 16.5 months; lifetime net -$17,186.

Understanding Your Result

Your Result: Monthly Payment Saving: $314

Typical range: The classic rule is a 0.75–1.0 point rate drop with a break-even under 36 months; below 24 months is compelling.

What This Means

Why It Matters

Saving $314.26/month against $5,200 of costs breaks even at 16.5 months; lifetime net -$17,186.

Professional Interpretation

Saving $314.26/month against $5,200 of costs breaks even at 16.5 months; lifetime net -$17,186.

How this is calculated

What drives the result

Recommendations

•Refinance only if you will keep the loan well past the break-even month.
•Compare a no-cost refinance: a higher rate with zero fees often wins on horizons under five years.

Educational Content

Introduction

Refinancing trades today’s rate and payment for a new set, against the closing costs of doing it. The analysis is mechanical: interest saved per month versus cost, and how many months it takes for the saving to pay back the cost.

Concept Explanation

Applications

▸Cutting the rate when it has fallen 0.75–1.0 points below your note rate

▸Resetting an adjustable loan to fixed before the first reset

▸Removing PMI or FHA MIP by restructuring

▸Extracting equity deliberately (cash-out) at a sensible rate

Benefits

•Quantifies the monthly saving and the break-even month
•Shows the term effect — a lower payment can still mean more total interest
•Compares cost and no-cost structures directly
•Tests cash-out scenarios without committing

Limitations

•Assumes you hold the new loan long enough for the saving to exceed costs
•Closing costs are estimates until the loan estimate is issued
•Resetting to a fresh 30-year term can raise lifetime interest even at a lower rate
•Credit and appraisal outcomes can change the pricing after application

Best Practices

•Compute break-even before applying, and again with the real loan estimate
•Consider a shorter term — the payment may barely rise while the saving soars
•Compare at least three lenders; refinance spreads vary widely
•Time the lock so per-diem interest and escrow overlap do not double-charge

Common Misconceptions

Myth: A 1% rate drop always pays

Truth: On small balances or short remaining terms the monthly saving may never cover the costs.

Myth: Refinancing resets nothing

Truth: It replaces the term; the amortisation clock restarts at the new term length.

Practical Tips

•Compute break-even before applying, and again with the real loan estimate
•Consider a shorter term — the payment may barely rise while the saving soars
•Compare at least three lenders; refinance spreads vary widely

Common Mistakes

A 1% rate drop always pays

On small balances or short remaining terms the monthly saving may never cover the costs.

Refinancing resets nothing

It replaces the term; the amortisation clock restarts at the new term length.

Assumptions

This calculator makes the following assumptions to provide estimates:

Figures as entered: The result follows directly from the values you supplied.

Limitations

Be aware of these limitations when using this calculator:

Limitation: Assumes you hold the new loan long enough for the saving to exceed costs

Limitation: Closing costs are estimates until the loan estimate is issued

Limitation: Resetting to a fresh 30-year term can raise lifetime interest even at a lower rate

Limitation: Credit and appraisal outcomes can change the pricing after application

Frequently Asked Questions

Answers to common questions about this calculator.

Who uses the refinance break-even calculator?

It is used by home buyers comparing mortgage offers, by owners weighing a refinance or equity move, and by loan officers and advisers sanity-checking a payment, ratio or fee structure. It sits in the Refinance group of the Mortgage & Home Finance section of Atlascalcs.

How accurate is the refinance break-even calculator?

Every figure follows directly from the inputs using standard amortisation mathematics, so it is accurate to the quality of the values you enter. Lenders round payments and apply their own day-count conventions, so expect small differences against a formal statement or payoff quote.

How current are the rates and thresholds used here?

The calculator uses the figures you enter, so update the rate to your actual offer or current market quote. Ratio thresholds, poverty guidelines and programme rules reflect the conventions described in the references and change periodically.

Does rounding change the results?

Every calculation runs on full precision and rounds only for display. Lenders round payments to the nearest cent or dollar, so expect a small difference between these figures and a formal statement or payoff quote.

Should I use the payment or the total cost to compare offers?

Use the payment to judge cash flow and the finance charge or APR to judge cost. When two offers differ on both, the all-in cost over the period you expect to hold the loan is the decisive measure.

Can I use this calculator for a business or commercial loan?

Yes. The payment, amortisation, ratio and cost calculators apply the same amortisation mathematics to commercial loans; the difference is in the fees, covenants and collateral rules, which you should enter explicitly.

What information should I have ready before applying?

Your exact rate and term, the fee schedule, any required add-ons, and your gross income and existing monthly obligations. With those five numbers every figure on this page can be tied back to a lender quote.

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Related Guides

Deepen your understanding with these educational resources.

Loan repayment and amortisation guide

How payments split between interest and principal, and how to read a schedule.

Borrowing cost and APR explained

Rate versus APR, points, fees and the cost of a longer term.

Qualifying for credit

The ratios lenders use, and how to improve each one before applying.

Glossary

Technical terms used in mortgage calculations explained in plain language.

Principal: The amount borrowed, excluding interest and fees. Payments applied to principal reduce the balance and therefore future interest.
Amortisation: Repaying a debt through a schedule of payments that gradually shifts the split from interest to principal until the balance reaches zero.
APR (Annual Percentage Rate): The yearly cost of credit expressed as a rate, including interest and most upfront finance charges.
Finance charge: The total dollar cost of credit, including interest and certain fees.

Authoritative References

Trusted sources and standards referenced by this calculator.

Consumer Financial Protection Bureau — Loan options and disclosures Consumer Financial Protection Bureau — What is a debt-to-income ratio? Federal Reserve — Consumer credit (G.19) statistical release Federal Reserve — Consumer credit and leasing guides U.S. Small Business Administration — Loan programmes Federal Student Aid — Income-driven repayment plans Federal Student Aid — Public Service Loan Forgiveness Federal Trade Commission — Consumer credit guidance

Applicable Standards

Level-payment (simple-interest) amortisation, payments assumed in arrearsAPR computed by discounting the actual payment stream to net proceedsDebt ratios computed on gross income for lender comparisonsMoney rounded for display only; all calculations run at full precision

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Page Information

Last Updated:

2026-09-21

Version:

2.0.0

References:

License:

Free to use for educational and professional purposes.