Should you refinance your mortgage?

Break-even is a question about your life

The arithmetic is trivial: divide the closing costs by the monthly saving and you have the number of months before refinancing has paid for itself. Six thousand five hundred in costs against two hundred and fifteen saved is about thirty-one months.

What that number is really asking is how long you will keep this loan, and that is not a financial question. Refinancing is only worth it if you are still holding the mortgage past the break-even point, so the decision turns on a prediction about your own circumstances — a job change, a growing family, a move you have not planned yet.

People are systematically optimistic here. The median time in a home is considerably shorter than the term of the loan on it, and the number of borrowers who refinance again within a few years is large. Both shorten the horizon over which the costs are recovered, and both are invisible when the decision is framed as "the rate is lower now".

A useful discipline is to invert it. Rather than asking whether the break-even is short enough, ask how confident you are of being here in that many months. Thirty-one months is a different proposition at the start of a career than in a house you intend to retire in, and the arithmetic is identical in both cases.

The term reset that flatters everything

The single most misleading move in a refinance comparison is quietly changing the term, and it happens by default: a new mortgage is offered as a fresh thirty years regardless of how many you had left.

Take a balance with twenty-five years remaining. Refinance into a new thirty and the payment falls partly because the rate improved and partly because the same debt is now spread over sixty additional months. Only the first part is a saving. The second is a rescheduling that adds interest, and it is invisible in the monthly figure that the comparison is usually built on.

The effect is large enough to reverse a conclusion. On a balance with twenty-five years left, moving from a high rate to a much better one over a matched term can save tens of thousands in interest; taking the same rate over a fresh thirty years produces a bigger monthly saving and a lifetime saving close to nothing. The better-looking option is the worse one.

So the honest comparison holds the term constant. Put the months you actually have left into the new loan, see what the payment becomes, and treat that difference as the real saving. If you then choose a longer term deliberately — because cash flow matters more than lifetime cost right now — that is a reasonable trade made with the numbers visible, which is different from being sold it.

Costs, points and the second break-even

Closing costs are the origination or arrangement fee, valuation, legal and title work, recording fees, and anything the lender bundles in. On a mid-sized mortgage they commonly run to a few percent of the balance, which is what makes break-even a real hurdle rather than a formality.

Two framings hide them. "No-cost" refinancing generally means the costs are paid through a higher rate, so you are financing them at mortgage interest for the life of the loan rather than avoiding them. And rolling the costs into the balance is the same trade with a different label — the money is still spent, it is simply borrowed.

Points are the mirror image: paying money up front to buy the rate down. That creates its own break-even, and it is usually longer than the one on the closing costs, because a point buys a modest rate reduction whose value accumulates slowly. Points reward a long horizon and punish a short one, so they magnify whatever answer you reached about how long you will stay.

Whatever the structure, compare on the same basis. A quoted APR is meant to fold fees into a single comparable rate, but it does so over the full term — which flatters an expensive deal if you leave early. For a short expected horizon, the raw numbers matter more than the APR does.

What you might be giving up

A low fixed rate is an asset, and it does not appear anywhere on a refinance quote.

If your existing loan is fixed at a rate well below what is currently available, that difference is worth real money for every remaining year, and giving it up to release equity or restructure is a genuine cost rather than a neutral swap. The saving on paper may not survive it.

Cash-out refinancing deserves a separate look for the same reason. Converting equity into cash by taking a larger loan is not a refinance in the sense this article has been discussing — it is new borrowing, secured on your home, usually at a slightly worse rate than a plain rate-and-term deal. That can be the right decision, but it should be priced as borrowing rather than presented as an optimisation.

Watch the clock reset on progress, too. Payments early in an amortisation schedule are mostly interest, and years into a loan a growing share is finally going to principal. Restarting puts you back at the front of that curve, where the split is worst — which is a cost that no rate comparison shows and that compounds with the term reset described above.

Cheaper things to try first

Several alternatives cost far less than a refinance and are worth pricing before it.

Ask your existing lender for a rate reduction or a product transfer. Retention offers exist, they carry little or no fee compared with moving, and the request costs nothing. This is the highest-return five minutes available in the whole exercise.

A recast, where a lump sum is applied to the balance and the payment is recalculated over the remaining term, is a different tool for a different problem. It lowers the payment without changing the rate or restarting the term, and typically costs a small administrative fee rather than full closing costs. Not every lender offers it, and it is rarely advertised.

And overpaying is often the better answer to the question people are really asking. If the goal is to pay less interest overall, paying extra against principal achieves that with no fees, no application, no credit check and no reset — and unlike a refinance it can be stopped at any time. Refinancing is worth its cost when the rate gap is genuinely large or the term structure is wrong; for anything smaller, the cheaper levers usually win.

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