How much does your rate need to drop to refinance?

A common question has a frustrating answer: how much does your rate need to drop to make refinancing worth it? You will see rules of thumb like "wait for a 1 percent drop," but the honest answer is that there is no universal number. What matters is your specific breakeven, and here is how to find it.

Why the "1 percent rule" misleads

The old guidance that you should only refinance if your rate drops by a full percentage point is a rough shortcut, and it is wrong about as often as it is right. A smaller drop can be very much worth it on a large balance you will keep for years; a full point can be a waste on a small balance you are about to sell. The rule ignores the two things that actually decide the answer: your closing costs and how long you will stay.

What actually decides it

Refinancing is worth it when your monthly savings pay back your closing costs comfortably before you sell or move. A bigger loan balance turns a small rate drop into large monthly savings; a small balance means even a big rate drop saves little. Higher closing costs push the breakeven out; lower costs pull it in. The rate drop is just one input among several, not the whole answer.

Illustrative: $11,000 in closing costs, $250 saved each month. Refinancing pays for itself at the breakeven point; stay past it and the savings are yours, sell before it and you lose money.

Illustrative: a $300,000 balance at 6.5% with $6,000 (2%) in costs, refinanced to a fresh 30-year at each rate drop. Breakeven falls steeply, then flattens: here a half-point drop already pays back within about five years, while a quarter point takes a decade. The 1 percent rule is one vertical slice of this curve, and where your curve sits depends on your balance and costs, which is why the rule is wrong as often as it is right.

Run your own breakeven

Instead of waiting for a rate drop that may not mean anything for your situation, calculate your breakeven directly: estimate the new payment, find the monthly savings, divide your closing costs by it, and compare that to how long you plan to stay. That is exactly what Wend’s mortgage tool does, and it turns a vague rule of thumb into a clear yes, no, or genuine judgment call for your numbers specifically.

See if refinancing pays off

Sources

Consumer Financial Protection Bureau, Owning a Home: Refinance
Freddie Mac, "Should I refinance?"