When to Refinance

Refinancing replaces your current loan with a new one, usually to get a lower rate, a different term, or to pull cash out. It is not free — closing costs run 2% to 5% of the loan — so a refinance only pays off when the savings outrun those costs. Here is the clear rule for deciding.

The break-even rule

Every refinance decision reduces to one calculation: divide your closing costs by your monthly savings. The result is the number of months it takes for the refinance to pay for itself.

Example: a refinance costs $6,000 in fees and lowers your payment by $200 a month. $6,000 ÷ $200 = 30 months. If you plan to stay in the home longer than 30 months, the refinance wins; if you move sooner, you lose money. That 30 months is your break-even point, and it is the single most important number in the decision.

Run both loans on the HomeMath calculator, subtract the payments, and divide the closing cost by the difference. If the answer is shorter than your expected stay, proceed.

When to refinance

Three situations clearly justify a refinance:

• Rates have dropped meaningfully. The classic trigger is saving 0.75% to 1% off your current rate. On a $300,000 loan, dropping from 7% to 6% saves about $190 a month.
• You can drop PMI. If your home has appreciated enough that you now have 20% equity, refinancing can eliminate private mortgage insurance — a saving of $100 to $300 a month that has nothing to do with the rate.
• You need to escape an ARM. If your adjustable-rate mortgage is about to reset higher, refinancing into a fixed rate locks in certainty before the payment jumps.

A fourth, more personal reason is changing the term — refinancing from a 30-year into a 15-year to pay it off faster, or the reverse to lower the payment. These change your whole plan, so treat them as a bigger decision than a simple rate trade.

When to wait

Equally important is knowing when not to refinance:

• You will move before the break-even point. If you plan to sell in 18 months and your break-even is 30 months, the refinance is a guaranteed loss.
• Your credit score has dropped. A lower score means the new rate may be no better than your old one — or worse. The refinance only helps if you qualify for a better rate than you already have.
• You are deep into the loan. In the late years of a mortgage, most of each payment is already principal, and interest is small. Refinancing resets the clock and front-loads interest again, which can cost more than it saves.

The last point trips people up. A refinance does not continue your old loan at a new rate — it starts a brand-new loan, and the first years of any loan are interest-heavy again. Compare your remaining interest on the old loan against the total interest on the new one, not just the shiny lower payment.

What refinancing actually costs

Refinance closing costs look a lot like purchase closing costs: an application fee, an appraisal, title search and title insurance, and various lender and recording fees. Total is typically 2% to 5% of the loan amount — so $6,000 to $15,000 on a $300,000 loan.

You have two ways to pay. You can pay cash at closing, which preserves your equity. Or you can roll the costs into the new loan, which means no cash out of pocket but a higher balance — and you pay interest on those closing costs for the life of the loan. Rolling costs in is convenient but makes the break-even math worse, because the loan balance itself grows.

Watch for "no-cost" refinances. They do exist, but the costs are not waived — they are hidden in a higher interest rate or a larger loan balance. Always ask where the cost went before believing it is free.

Frequently asked questions

How much lower should my rate be to refinance?

A common benchmark is 0.75% to 1%, but the real test is the break-even calculation: closing costs divided by monthly savings, compared to how long you will stay.

Does refinancing reset my loan term?

Usually yes. A new 30-year refinance restarts the 30-year clock. You can choose a shorter term to avoid adding years, but that raises the payment.

Can I refinance with bad credit?

You can try, but the point of refinancing is a better rate, and bad credit makes a better rate unlikely. Fix your credit first, or refinance may not be worth it.

How soon can I refinance after buying?

Technically almost immediately, but you need enough equity and a rate improvement to make it worthwhile. Many people wait until rates drop or they reach 20% equity to drop PMI.

Compare your current loan against a refinance on the HomeMath mortgage calculator before committing — the break-even math is the only thing that matters.