Finance Tool✨ New Release
Refinance Calculator
Calculate monthly mortgage payment savings, total lifetime interest savings, and break-even month timeline when refinancing your mortgage or loan.
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Interactive Refinance Calculator Workspace
Existing Loan Details
New Refinance Offer
Refinance Break-Even & Savings Summary
Monthly Payment Savings+$271.85per month difference
Break-Even Period19 Mos(~1.6 years)
New Monthly Payment$1,753.77vs current $2,026
Net Lifetime Savings$76,555after upfront closing costs
Mathematical Formula & Variables
Equation Model
Break-Even (Months) = Refinancing Closing Costs / (Current Monthly Payment - New Monthly Payment)Refinance break-even point calculates the exact number of months required for cumulative monthly payment savings to surpass total upfront refinancing closing costs.
Variable Definitions
| Symbol | Description |
|---|---|
| Current Principal | Remaining loan balance owed on current mortgage. |
| Current Interest Rate | Existing annual interest rate (%). |
| Current Term Left | Remaining loan term in years. |
| New Interest Rate | Proposed refinancing interest rate (%). |
| New Loan Term | New mortgage loan term in years. |
| Upfront Closing Costs | Total refinancing origination, appraisal, title, and lender fees. |
How to Use the Refinance Calculator
- Enter your remaining current loan principal balance.
- Input your current annual interest rate and remaining years left on the mortgage.
- Enter the new offered annual interest rate and selected new loan term (e.g., 15, 20, or 30 years).
- Specify total upfront refinancing closing costs (origination fees, points, title insurance).
- Review your new monthly payment, monthly cash savings, lifetime interest difference, and exact break-even month.
Mortgage Refinance Break-Even Example
Scenario Context: A homeowner owes $300,000 on a mortgage at 6.5% interest with 25 years remaining (Current P&I = $2,025.62/mo). A lender offers a refinance at 5.0% for 25 years with $5,000 closing costs.
Step 1: Calculate Current Monthly P&I = $2,025.62
Step 2: Calculate New Monthly P&I = $1,753.77
Step 3: Calculate Monthly Savings = $2,025.62 - $1,753.77 = $271.85 / month
Step 4: Calculate Break-Even Timeline = $5,000 closing costs / $271.85 monthly savings = 18.39 months (~19 months)
Step 5: Calculate Total Lifetime Interest Saved over 25 years = $81,555
Refinancing lowers monthly payment by $271.85, breaks even on closing costs in 19 months, and saves $81,555 in total interest.
Frequently Asked Questions
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