Mortgage Refinance Break-Even Calculator

Should you refinance? The complete break-even analysis

Refinancing a mortgage can save tens of thousands of dollars over the life of a loan — or it can cost you money if you do not stay long enough to recoup the closing costs. The break-even calculation is the essential tool for making this decision correctly. It answers one question: how long until your cumulative monthly savings exceed the upfront cost of refinancing?

The break-even formula

The formula is straightforward: divide your total closing costs by your monthly savings after refinancing. If closing costs are $6,000 and your new payment is $200 less per month, your break-even point is 30 months (6,000 ÷ 200 = 30). Every month after month 30, you are ahead.

The calculator above computes your new monthly payment using standard amortization math, subtracts it from your current payment, and divides the result into your closing costs. If the new payment is higher than your current payment — which can happen when refinancing to a shorter term — there is no monthly savings and the break-even analysis does not apply. In that case, the value of refinancing to a shorter term is the total interest saved over the life of the loan, not a monthly-savings calculation.

When does refinancing make sense?

The classic rule of thumb is to refinance when you can reduce your rate by at least 1 percentage point and plan to stay in the home long enough to break even. That 1% guideline is a useful starting point, but it is too simple — a 1% rate drop on a $100,000 balance saves much less per month than on a $500,000 balance. This calculator gives you the exact number for your specific situation.

A few scenarios where refinancing typically makes strong sense:

• Rates have dropped more than 1% since you got your original mortgage
• Your credit score has improved significantly, qualifying you for a better rate
• You want to shorten your term — move from a 30-year to a 15-year mortgage — to save on total interest even if monthly payments rise
• You have an adjustable-rate mortgage (ARM) and want to lock in a fixed rate before it resets higher
• You want to eliminate PMI by refinancing once you have reached 20% equity

What are typical refinance closing costs?

Closing costs on a refinance typically run 2–5% of the loan balance. For a $300,000 mortgage, expect $6,000–$15,000 in fees. Common line items:

• Origination fee: 0.5–1% of the loan amount — the lender's fee for processing the loan
• Appraisal: $300–$600 to verify the home's current market value
• Title insurance: $500–$2,000 — protects against title defects
• Recording fees: $50–$250 for recording the new mortgage with the county
• Prepaid items: property tax escrow, homeowners insurance, prepaid interest

Some lenders offer "no-closing-cost" refinances — they fold the closing costs into a slightly higher interest rate or add them to the loan balance. This makes sense if you plan to sell or refinance again within a few years, because you avoid the upfront payment. But over the long term, a no-closing-cost refi at a higher rate can cost more than paying closing costs outright.

Rate-and-term vs cash-out refinancing

This calculator is designed for rate-and-term refinances — where you simply change your interest rate or loan term without extracting equity. A cash-out refinance is different: you borrow more than you owe, take the difference as cash, and increase your loan balance. The monthly payment comparison is more complex because you are changing the principal, not just the rate.

For a cash-out refi, use the refinance calculator to model the full scenario, or compare your new payment to what your current mortgage would look like at the same remaining balance. The mortgage calculator can help you model the new payment from scratch.

The decision in practice

Once you have your break-even number from the calculator, the decision is simple: if you expect to stay in the home (or keep the loan) longer than the break-even period, refinancing saves you money. If you plan to sell, pay off the mortgage, or refinance again before break-even, do not refinance.

A break-even of under 24 months is generally considered excellent — if you plan to stay at all, it almost certainly makes sense. Break-even of 24–60 months is reasonable for most long-term owners. Over 60 months (5 years), the calculus becomes riskier — life changes faster than we expect, and refinancing assumes you will stay put.