How do I calculate the break-even point on a refinance?

Break-even months = total closing costs ÷ monthly payment reduction. If refinancing costs $9,000 and reduces your payment from $2,450 to $2,225, the monthly savings is $225. Break-even = $9,000 ÷ $225 = 40 months (3 years 4 months). If you plan to stay in the home beyond 40 months, refinancing saves money. If you might sell or refinance again before 40 months, the closing costs are not recovered and the refinance costs you money net.

What closing costs should I include in the break-even calculation?

Include all out-of-pocket costs: origination fee (0.5–1% of loan), appraisal ($400–$700), title search and insurance ($1,000–$2,500), recording fees ($50–$250), prepaid interest (prorated days until first payment), and any discount points paid to buy down the rate. Do not include escrow deposits for taxes and insurance — those are your money held in escrow, not a cost. For a "no-closing-cost" refinance, the lender rolls costs into the rate, which means no break-even period but a higher monthly payment forever.

How does a cash-out refinance change the break-even analysis?

A cash-out refinance involves two calculations: (1) the break-even on the rate reduction (same as a rate-and-term refi), and (2) the cost of the cash received versus alternative borrowing (HELOC, personal loan). The monthly payment on a cash-out refi often increases, making the "monthly savings" negative — but you received a lump sum of equity. Compare the effective interest rate on the cash extracted to alternatives: if you are accessing $80,000 at 7% (cash-out refi rate) versus 9.5% (HELOC), the cash-out saves $2,000/year on the extracted portion even though the total payment is higher.

Does the break-even calculation account for taxes?

The simple version does not. Mortgage interest may be tax-deductible if you itemize, which means a rate reduction saves you less after-tax than the gross payment reduction suggests. At a 24% federal bracket, $225/month in gross savings = approximately $172/month after losing the deduction on the interest you are no longer paying. Tax-adjusted break-even = $9,000 ÷ $172 = 52 months. For most borrowers in the standard deduction, the gross calculation is accurate enough — only itemisers need to adjust.

What is the 1% rate reduction rule for refinancing?

The traditional guideline is to refinance when you can reduce your rate by at least 1%. This is a useful initial filter but imprecise. A 1% rate reduction on a $500,000 loan saves far more than the same drop on a $100,000 loan. The break-even calculation is always more accurate. The 1% rule also ignores your time horizon — a 0.5% reduction with low closing costs can make sense on a large balance if you plan to stay 10+ years, while a 1.5% reduction is pointless if you plan to sell in 18 months.

Refinance Break-Even Calculator: How Long Until Refinancing Pays Off?

The refinance break-even is closing costs divided by monthly savings. On $9,000 in closing costs saving $225/month, break-even is 40 months. Refinance only if you stay past that point. This guide walks through the exact calculation, what counts as a closing cost, how a cash-out refi changes the math, and when break-even analysis does not apply.

The refinance break-even point is closing costs divided by monthly payment reduction. If refinancing costs $9,000 and reduces your payment by $225/month, break-even is 40 months (3 years 4 months). Refinancing only makes financial sense if you stay in the home — and keep the new loan — beyond that point. This guide walks through the exact calculation, what counts as a real cost, how cash-out refinances change the math, and when the break-even framework does not apply.

How to calculate the refinance break-even

The formula is simple but the inputs require care.

Break-even months = Total closing costs ÷ Monthly payment reduction

After month 40, every month adds $225 in net savings. After year 5, total savings = $4,500 beyond closing costs.

Step 1 — Identify all real closing costs

Include every out-of-pocket cost:

Cost item	Typical range
Origination fee	0.5–1.0% of loan amount
Appraisal	$400–$700
Title search + insurance	$1,000–$2,500
Recording fees	$50–$250
Prepaid interest	Days × daily interest
Discount points (if any)	1 point = 1% of loan
Total (typical)	$3,000–$15,000

Do not include escrow deposits for property taxes and insurance — those are your funds held in escrow, not a cost. If the lender offers to roll closing costs into the new loan balance, the break-even still applies: you are paying the costs over the life of the loan rather than upfront.

Step 2 — Calculate the true monthly payment reduction

Use the full PITI comparison: current payment vs new payment. If your current payment includes PMI that the refinance eliminates, include that saving. If the refinance resets the loan from a 20-year remaining term to a new 30-year term, the payment drops not just because of a rate reduction but because of term extension — be aware that you may pay less per month but significantly more in total interest over the new loan life.

Worked example: $320,000 loan, 7.5% → 6.75%

	Current loan	New loan
Loan balance	$320,000	$320,000
Interest rate	7.5%	6.75%
Remaining term	27 years	30 years (reset)
Monthly P+I	$2,298	$2,075
Monthly savings	—	$223/month
Closing costs	—	$8,500
Break-even	—	38 months (3.2 years)

Note: resetting to a 30-year term means you pay 3 additional years of interest. On $320,000 at 6.75%, 3 additional years costs approximately $45,000 in interest that would not have been owed on the original 27-year payoff. The monthly savings are real, but if you plan to hold the property long-term, compare total interest paid — not just monthly payment.

The 1% rate reduction rule — why it oversimplifies

The conventional wisdom is to refinance when you can reduce your rate by 1%. This is a reasonable filter but not a decision rule.

A 0.5% reduction on a $600,000 loan saves $250/month — more than a 1% reduction on a $150,000 loan ($75/month).
A 1.5% reduction with $20,000 in closing costs takes 100+ months to break even on a small loan — not worth it if you plan to sell within 5 years.
A 0.75% reduction with lender credits covering closing costs may have a break-even of zero — essentially free money with a slightly higher rate than the best available.

Always compute: total closing costs ÷ monthly savings = break-even months. Then compare break-even months to your planned time in the home.

How a cash-out refinance changes the break-even math

A cash-out refinance introduces a second calculation. You are simultaneously:

Refinancing the existing balance (rate change, potentially term change)
Borrowing additional cash against equity

The monthly payment on a cash-out refi often increases even if the rate drops, because the loan balance is now larger. In this scenario, the break-even framework for the rate reduction still applies to the refinanced portion. But the cash extracted should be evaluated separately: compare the effective rate on the extracted cash to alternative borrowing sources (HELOC, personal loan, margin loan).

Example: $380,000 existing loan at 7% refinanced to $460,000 at 6.5% (cash-out of $80,000). Monthly payment increases by $180. There is no monthly "savings" on the overall payment. The value comes from: (a) a potentially lower rate on the existing $380,000 balance vs alternatives, and (b) the effective cost of the $80,000 cash being 6.5% vs a HELOC at 9–10%.

When break-even analysis does not apply

Switching from ARM to fixed rate — the value here is risk reduction, not monthly payment reduction. Even if break-even is 5 years, eliminating rate risk may be worth the cost depending on your plans.
Shortening the loan term — refinancing from 30 to 15 years usually increases the monthly payment. The benefit is total interest savings, not a break-even period. Compare total interest paid on both scenarios.
Removing a co-borrower — divorce or separation may require a refinance regardless of rate economics. The break-even is irrelevant here.

Key takeaways

Break-even = closing costs ÷ monthly savings. If you stay past that point, you save money. If you leave before it, you lose money on the refinance.
Rolling closing costs into the loan means no upfront break-even — but you pay interest on the closing costs for the life of the loan, increasing total cost.
Term resets (30-year) inflate monthly savings by stretching the payment period — compare total interest, not just monthly payment, for long-term holders.
For FHA borrowers with 20%+ equity, the break-even on a conventional refinance includes the elimination of MIP — often worth $150–$350/month — which can make a rate-neutral refinance financially positive.

Run the exact break-even for your numbers with the Refinance Break-Even Clock, which accounts for closing costs, your remaining term, and tax considerations. To see how extra payments interact with a refinance decision, use the Mortgage Payoff Accelerator. For related reading, see when to refinance your mortgage and how to remove PMI.