A lower monthly payment feels like a win. Sometimes it is. Sometimes it is the same debt stretched over more years, with fresh closing costs stapled to the front.
What is a refinance?
The CFPB defines it plainly. “Refinancing happens when you pay off your current mortgage with money from a new mortgage.”
It also warns what that involves. “Refinancing may remind you of what you went through when you got your current mortgage. You could go through many of the same steps and could pay many of the same costs.”
What does it cost?
Two sources give two different ranges, and they should stay separate.
The CFPB says purchase closing costs “typically range from 2% to 5% of the home purchase price,” and notes that refinancing costs “can be about the same amount.”
Freddie Mac’s consumer guidance gives a refinance specific figure: expect to spend 3% to 6% of your loan principal.
Different sources, different transaction types, different methods. Do not average them into one number. Use them as a signal that a refinance is a four figure or five figure decision, not a form you sign.
What is the two year rule of thumb?
The CFPB’s Home Loan Toolkit gives a test you can run in a minute.
“In the case of a refinance, consider how long it will take for the monthly savings to pay for the cost of the refinance… A common rule of thumb is to proceed only if the new interest rate saves you that amount over about two years.”
It calls that a common rule of thumb, not a law. Your own plans matter more than the number. But if the payback runs many years past two, that is a signal worth taking seriously.
Why does a new 30 year term cost more?
Because you restart the schedule. On any amortizing loan, the early payments are mostly interest and very little principal. Years in, that mix has slowly shifted toward principal.
Refinance into a fresh 30 year loan and you go back to the beginning of that curve. Your payment drops, but a bigger share of it is interest again.
The CFPB describes the same effect without the technical words. “When you refinance to lower your interest rate, you are signing up for a new loan with a new loan term, which could be longer. That could mean a lower monthly payment, but paying more money in total.”
It also gives a fix. “Talk to your lender about the length of your new loan. It is often possible to choose a custom loan term, like 22 years instead of 30 years.”
That one question can protect most of the benefit. You keep the lower rate without buying back years you already paid for.
When should I not refinance?
The CFPB publishes a short checklist. If you check any of these boxes, it might not make sense.
Are you planning to move soon? If you will move in the next few years, you may not have time to recoup the cost.
Has the value of your home fallen? Has your credit standing declined? Both can worsen the terms you are offered.
Does your mortgage have a prepayment penalty? Check your loan documents. If there is one, you pay it when you refinance, and it goes straight onto the cost side of the math.
Is a no cost refinance really free?
No. Freddie Mac’s consumer guidance says there is no such thing as a free loan. The lender is probably charging a higher rate or rolling the closing costs into the balance, which can cost more over the life of the loan.
The costs did not disappear. They moved somewhere less visible.
What this means for you
Get a Loan Estimate for the refinance, just as you would for a purchase. The CFPB points out this is where you see the total dollar cost of the loan, which is “the price you pay to achieve the potential savings.”
Then do two divisions. Closing costs divided by monthly savings gives your payback in months. Compare that to how long you actually plan to stay. The box above runs the same division on points for this loan and lands at 61 months, so you can see the shape of the answer before you do it on your own refinance quote.
Watch the total, not just the payment. On this $320,000 loan at 6.5%, principal and interest are $2,023 a month and roughly $411,342 over the full term. That 6.5% rate is an illustrative 6.59% APR, the yearly cost with fees counted, if the lender charges $3,000 in fees. Compare the refinance on APR as well as on the payment. A smaller payment on a longer term can raise that second number.
Ask for a shorter custom term. Ask about a prepayment penalty on the loan you already have. And get more than one refinance quote, for the same reason you should have shopped the first loan.