Two lenders can quote you the same rate on the same day and still hand you very different five-year bills.
The difference usually comes down to one line on the loan estimate: discount points.
Each point costs 1% of your loan amount and buys down your interest rate, and whether that trade pays off depends entirely on how long you stay put.
On a $400,000 mortgage, one point runs $4,000 at closing.
In a typical setup, that point might trim your rate by about 0.25%.
On a 30-year loan, that's roughly $58 less per month, according to mortgage calculator math.
Divide the $4,000 by $58 and you're looking at about 69 months, or nearly six years, just to break even.
Move, refinance, or pay the loan off before then and you donated that money to the bank.
The math flips depending on your timeline.
If you're confident you'll be in the house for a decade or more, buying points can save real money over the life of the loan, sometimes tens of thousands of dollars.
If there's any chance of a job move, a growing family, or a refi when rates drop, paying points is a bet you might lose.
Lenders know most borrowers underestimate how often life changes.
Points are paid upfront in cash, on top of your down payment, closing costs, and moving expenses.
Stretching your savings thin to buy a lower rate leaves you with no cushion when the water heater dies in month two.
A slightly higher rate with money still in the bank is often the smarter move, even if the spreadsheet says otherwise.
No-points loans aren't automatically better, either.
Lenders frequently charge a higher rate to cover their costs when you skip points, and some advertise "no-cost" mortgages that simply bury fees in a higher rate.
Compare loan estimates side by side, not just the headline rate.
Ask for the total cost over five, seven, and ten years, because that's the number that actually hits your wallet.
In a slow market, some sellers will cover points as a concession, which lowers your rate without touching your savings.
That's often the best of both worlds, but you have to ask.
It's negotiable, and plenty of buyers never bring it up.
The rule of thumb floating around real estate offices is simple: plan to stay past the break-even point or skip the points.
Run your own break-even math with an online calculator, using your actual loan amount and the actual rate quotes you received.
Ten minutes of arithmetic beats a 30-year regret.
Our take: points are a tool, not a scam, but they're oversold to buyers who haven't decided how long they'll stay.
Know your break-even number before you sign anything, and never drain your emergency fund to chase a lower rate.
Final Thoughts
If the math only works when everything goes perfectly, it doesn't work.