Refinance Savings Calculator
Find out how much refinancing saves per month, when you break even on closing costs, and how much you save over the life of the loan.
Refinancing made sense for a lot of people in 2020–2021 when rates dropped to historic lows. The math always comes back to the break-even point: how many months until the monthly savings exceed the closing costs. If you plan to stay longer than that, refinancing pays off. If not, it likely doesn't.
The break-even rule: divide total closing costs by monthly savings. If you'll stay in the home longer than that many months, refinancing makes financial sense. If not, the upfront costs outweigh the savings.
The break-even calculation
Refinancing incurs upfront costs (closing costs, typically 1–3% of the loan amount) in exchange for lower monthly payments. The break-even point is when cumulative monthly savings equal the closing costs. If closing costs are $6,500 and you save $200/month, break-even is 32.5 months, about 2.7 years. If you sell or refinance again before that point, you've lost money on the transaction.
The hidden cost of resetting the term
Refinancing into a new 30-year loan when you have 27 years remaining on your current loan extends your payoff date by 3 years. Even if the monthly payment drops, those 3 extra years add significant total interest. This calculator shows lifetime savings net of this extension. Refinancing into a shorter term (15 or 20 years) eliminates this issue but increases the monthly payment.
When refinancing makes sense
A common guideline is that refinancing is worth it when you can reduce your rate by at least 0.75–1%. But the right threshold depends on your remaining term, loan balance, and planned time in the home. A 1% rate reduction on a $500,000 loan with 25 years remaining saves far more than the same reduction on a $150,000 loan with 8 years remaining.
No-cost refinancing
Some lenders offer "no-cost" refinancing where closing costs are rolled into the loan balance or offset by a higher interest rate (the lender pays costs via a higher rate spread). No-cost refinancing has an immediate break-even but a higher long-term cost due to the elevated rate or larger balance. It makes sense when you're uncertain how long you'll stay, or when the rate improvement is large enough that even the higher rate beats your current rate significantly.
Cash-out refinancing
Cash-out refinancing replaces your existing mortgage with a larger loan, taking the difference in cash. This can make sense for funding home improvements at mortgage rates rather than personal loan rates, but it increases your balance and may extend your payoff date. It also converts home equity to debt, increasing financial risk. Evaluate cash-out refis based on the specific use of funds and the rate difference, not just the cash access.
Frequently asked questions
How often can I refinance?
There's no legal limit on refinancing frequency. Most lenders require 6–12 months of seasoning between refinances on the same property. If rates drop significantly, refinancing multiple times can make sense, just recalculate the break-even each time to ensure the economics work.
Does refinancing hurt my credit?
Yes, modestly and temporarily. The hard inquiry from a new application typically reduces your score by 5–10 points. Rate shopping multiple lenders within a 14–45 day window counts as a single inquiry under most credit scoring models. The new account lowers your average account age, which also has a small negative effect. These impacts typically recover within 6–12 months.
What credit score do I need to refinance?
Conventional loan refinances typically require a minimum 620 score, with the best rates going to borrowers above 760. FHA refinances allow scores as low as 580. VA and USDA refinances have their own eligibility requirements. Higher scores not only qualify you but can get you a meaningfully lower rate that improves the math significantly.