Calculator Panel
Calculation Ready
Enter your values above and click Calculate.
What This Calculator Does
This calculator calculates if and when refinancing an existing mortgage, auto loan, or personal loan becomes profitable by tracking how long it takes to recover your closing costs.
How to Use This Calculator
Enter your current loan balance, current interest rate, remaining term, and current monthly payment. Then, enter the proposed new loan interest rate, term, and closing costs. Click Calculate to see the break-even point and lifetime interest savings.
How the Calculation Works
The underlying math engine processes your inputs using exact formulas. This systematic approach ensures professional, institutional-grade calculation precision:
Mathematical Formula
Formula Legend:
- · Refinancing Costs = Total closing costs, application fees, or points paid upfront.
- · Monthly Payment Savings = Current Monthly Payment - Refinanced Monthly Payment.
Practical Example
You refinance a mortgage with a $3,000 closing cost, lowering your monthly payment from $1,800 to $1,650:
Step-by-Step Mathematical Walkthrough:
- 1 Monthly Savings = $1,800 - $1,650 = $150.
- 2 Refinancing Costs = $3,000.
- 3 Divide: $3,000 / $150 = 20.0.
- 4 The refinance break-even point occurs in exactly 20 months.
Important Assumptions & Notes
- The new loan starts immediately and replaces the current loan balance.
- Refinanced closing costs are paid upfront in cash, rather than rolled into the loan principal.
- Interest rates remain fixed for the duration of both loans.
Common Mistakes or Considerations
- Refinancing close to the end of a loan term, which can reset the interest amortization curve and increase total lifetime interest.
- Selling the asset or property before reaching the break-even month, resulting in a net financial loss.
- Rolling closing costs into the loan without realizing it increases the financed amount and lifetime interest.
Frequently Asked Questions
What are typical refinance closing costs?
Closing costs for a mortgage typically range from 2% to 5% of the loan amount, including origination, appraisal, and title fees.
Should I refinance if my monthly savings are small?
Only if you plan to stay in the home or keep the loan long enough to past the break-even point.
What does 'no-closing-cost refinance' mean?
It means closing costs are packaged into the loan principal or offset by a higher interest rate, which increases the total cost of the loan over time.
Can I refinance an auto loan?
Yes, auto loan refinancing is common and has very low or zero closing costs, making the break-even period near-instant.
How do discount points affect break-even?
Discount points lower your interest rate for an upfront cash fee, which extends your break-even period but maximizes long-term interest savings.