Ad · 320×50 Anchor (Mobile)
MortgageMath.app

Mortgage Refinance Calculator

Thinking about refinancing? Enter your new loan details to see your potential new monthly payment, then compare it against what you're paying now.

= $80,000

Monthly Payment
$2,129
Loan Amount
$320,000
Total Interest
$446,428
Total Cost
$846,428

Payment Breakdown

Down Payment$80,000 (9.5%)
Principal$320,000 (37.8%)
Total Interest$446,428 (52.7%)

When Does Refinancing Make Sense?

Refinancing typically makes sense when you can reduce your interest rate by at least 0.5–1%, you plan to stay in your home long enough to recoup the closing costs, or you want to switch from an adjustable-rate to a fixed-rate mortgage.

The Break-Even Point

Your break-even point is how long it takes for monthly savings to cover your refinancing closing costs (typically 2–5% of the loan amount). If you plan to sell before break-even, refinancing may not save you money.

  • Closing costs: typically $3,000–$6,000 on a $300K loan
  • Monthly savings: difference between old and new payment
  • Break-even months = Closing costs ÷ Monthly savings

Rate-and-Term vs Cash-Out Refinance

A rate-and-term refinance replaces your current mortgage with a new one at a lower rate or shorter term. A cash-out refinance lets you borrow more than you owe and take the difference in cash — useful for home improvements or debt consolidation, but increases your loan balance.