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Mortgage Refinance & Breakeven Calculator

Determine monthly payment savings and the breakeven timeline for mortgage refinancing.

Quick Answer:Refinancing is financially beneficial if your monthly payment savings cover your upfront closing costs well before you plan to move or sell the home.

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How to Use the Refinance Calculator: Breakeven Point & Monthly Savings

1Input your current remaining loan balance, current interest rate, and remaining months.
2Enter your proposed new interest rate and loan term (e.g. 15 or 30 years).
3Input estimated lender closing costs and appraisal fees.
4Review your monthly savings, breakeven period in months, and lifetime interest reduction.

Formula & How It Works

Breakeven Months Formula

Breakeven Months = Total Refinance Closing Costs / (Old Payment - New Payment)

Calculates the number of months required for monthly payment savings to repay upfront fees.

Worked Examples

Refinancing $320,000 from 7.125% to 5.75%

Input: Balance: $320k, Old: 7.125% (330 mos), New: 5.75% (30 yrs), Closing Costs: $4,500

Explanation: Saving $288 every month fully recovers the $4,500 closing costs in just 16 months, producing tens of thousands in lifetime interest savings.

Result: Monthly Savings: ~$288/mo, Breakeven: 16 Months, Lifetime Savings: $60,000+

Frequently Asked Questions

What is a good rule of thumb for refinancing a mortgage?▼

Historically, refinancing is considered advantageous if you can reduce your interest rate by at least 0.75% to 1.0% and plan to stay in the home past the breakeven period.

What are typical closing costs on a mortgage refinance?▼

Refinance closing costs typically range between 2% and 4% of the loan amount, covering origination fees, appraisal, title search, and credit checks.

Can I do a no-closing-cost refinance?▼

Yes, but lenders either roll the fees into your overall principal balance or offer a slightly higher interest rate to cover closing expenses.

Does refinancing affect my credit score?▼

Refinancing causes a minor, temporary dip due to hard credit inquiries, but regular on-time payments quickly restore your score.

Quick Reference & Conversion Table

Closing Costs	$150/mo Savings Breakeven	$250/mo Savings Breakeven	$350/mo Savings Breakeven
$3,000	20 Months	12 Months	9 Months
$4,500	30 Months	18 Months	13 Months
$6,000	40 Months	24 Months	18 Months
$7,500	50 Months	30 Months	22 Months

⚠️ Common Pitfalls to Avoid

•Refinancing into a new 30-year loan late into your current mortgage without factoring in total interest over the reset 30-year duration.
•Rolling closing costs into the loan balance without calculating the compounding interest paid on those fees.

💡 Practical Real-World Uses

•Evaluating when to refinance after Federal Reserve interest rate drops.
•Comparing whether a 15-year fixed loan provides faster equity payoff than a 30-year loan.

Last reviewed & updated: 2026-11-11

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