When Should You Refinance Your Mortgage?

What Refinancing Actually Does

Refinancing replaces your existing mortgage with a new one — typically with a different interest rate, term, or both. The new loan pays off the old one, and you begin making payments on the new terms. You go through the full mortgage application process again: credit check, income verification, appraisal, title search, and closing. That process is not free.

The two most common refinancing goals are: (1) lowering your monthly payment by securing a lower interest rate, and (2) shortening your loan term to build equity faster and reduce total interest paid. Sometimes these goals conflict — a lower rate with a reset 30-year term can reduce your monthly payment while significantly increasing total interest paid.

The Break-Even Calculation

Every refinance has upfront costs. The break-even point is the number of months it takes for your accumulated monthly savings to equal those costs. Until you reach break-even, refinancing has cost you money. After break-even, every month represents pure savings.

The critical variable is how long you plan to stay in the home. If you might sell in 2 years (24 months) but break-even is 30 months, you'll lose money on the refinance even if the rate is significantly lower. Conversely, if you're 10 years into a 30-year mortgage and plan to stay another 15 years, a break-even of 36 months represents a compelling return.

What Closing Costs to Expect

Refinance closing costs typically run 2–5% of the loan balance. On a $300,000 loan, that's $6,000–$15,000. The major components:

• Origination fee: 0.5–1% of loan amount — the lender's primary profit center on the loan
• Appraisal: $300–$700 to establish current market value
• Title search and insurance: $500–$1,500 to verify clean ownership and protect against future title disputes
• Recording fees: $50–$500 paid to the county to record the new mortgage lien
• Prepaid interest: Interest from closing day to the end of the month
• Escrow reserves: 2–3 months of property tax and insurance, held in escrow
• Attorney fees: Required in some states ($400–$1,500)

No-closing-cost refinances are available but not free. Costs are either rolled into the loan balance (you pay them plus interest over the life of the loan) or covered by a higher interest rate (you pay them through increased monthly payments). These can make sense if you plan to move or refinance again within a few years, since you avoid upfront cash outlay.

The Rate Reduction Threshold

You may have heard the rule of thumb that you should only refinance if you can reduce your rate by at least 1%. This was useful guidance in the era of lower rates and lower closing costs, but it's too simplistic today.

What actually matters is your break-even period relative to your time horizon. A 0.5% rate reduction on a large loan balance with low closing costs and a long time horizon may be an excellent deal. A 1.5% rate reduction with high closing costs and a planned home sale in two years may not be.

Run the actual math. Use the calculator below to compute your specific break-even based on your loan balance, current rate, new rate, and estimated closing costs.

The Hidden Cost of Resetting Your Amortization

Mortgage amortization is front-loaded with interest. In the early years, the majority of your payment goes toward interest, with relatively little reducing principal. As the loan ages, this ratio shifts — later payments are mostly principal.

When you refinance into a new 30-year mortgage, you reset this clock. Even at a lower rate, a new 30-year loan can result in more total interest paid than continuing on your existing mortgage — because you're restarting the interest-heavy early years of amortization.

The solution: refinance into a 15- or 20-year loan, or refinance into a 30-year loan and make extra principal payments to replicate a shorter term. A mortgage calculator can help you model these scenarios.

Good Reasons to Refinance

• Rates have dropped significantly since your original loan and your break-even is well within your planned ownership timeline
• You want to convert from an adjustable-rate mortgage (ARM) to a fixed-rate before a rate reset
• Your credit score has substantially improved, qualifying you for a meaningfully better rate
• You want to shorten your term (30 to 15 years) to build equity faster and reduce total interest
• You want to eliminate PMI by refinancing after reaching 20% equity (though you can also request PMI cancellation without refinancing)
• You need to access equity for a major expense (cash-out refinance) and the rate makes sense

When Not to Refinance

• You're planning to sell before break-even
• You're extending the term significantly without a compelling reason — lower monthly payments are not justification if total interest increases substantially
• You're late in your existing loan and most remaining payments are principal — the interest savings from a lower rate are minimal
• Your credit or income situation has deteriorated since the original loan — you may not qualify for a better rate, and the process of applying can temporarily ding your credit
• The rate environment suggests further decreases are likely — though timing the market is difficult and there's real cost to waiting