Should I Buy a House Now or Wait? What Waiting Actually Costs

If renting already beats buying at your numbers, waiting is free. If buying wins, a year of waiting costs about $15,000 unless your later rate is under 6.1%. Priced.

Written by Jonathan Nyst Updated September 2026 6 min read Rates & timing Every figure re-runnable

Whether to buy now or wait comes down to a test you can run today, not a forecast: does buying already beat renting at your price, your rent and your rate? If it does not — and in our model’s default scenario it does not, renting wins by about $67,000 over ten years — then waiting costs you nothing, because the thing you are postponing was the losing move. If buying does win at your numbers, waiting has a price. Take the same $420,000 home at 6.5% but a comparable rent of $2,800 a month, where buying wins by about $61,000: renting one more year and then buying costs about $15,000 against buying today, two years about $29,000, three about $42,000 — and for waiting to pay, the rate you eventually lock has to be below about 6.1% after one year, 5.7% after two, or 5.1% after three. Those are the numbers to hold against whatever you believe about the market.

Is now a good time to buy a house? Only if buying already beats renting

“Good time” is the wrong frame, because it treats the market as the variable. The variable is your own comparison. Our model runs the same person down two paths for the whole stay — buy the house, or rent a similar one and invest what buying would have cost — and reports who is worth more at the end, selling costs and taxes included. At today’s rates that contest is closer than most people think: in the default scenario ($420,000 home, $2,100 rent, 20% down at 6.5%, ten years), renting and investing the difference finishes about $67,000 ahead. Buying only pulls ahead once a comparable rental costs more than about $2,468 a month — the tipping-point rent — or once your rate is near 5% or below.

So the first thing to do is not read a forecast. It is to find out which side of the tipping rent you are on, with your real numbers, at the rate a lender will actually quote you. Freddie Mac’s weekly survey had the 30-year fixed in the high 6% range through most of September 2026 and at 7.40% on October 8, and the Fed’s quarter-point increase on September 16 did nothing to lower it — mortgage rates and the Fed shows the verdict at every rate near the current survey average. If renting wins at your numbers, the rest of this guide is a formality: wait, invest the difference, and re-run the comparison when something real changes. If buying wins, keep reading, because waiting is now a bet with a price on it.

What does waiting a year actually cost when buying wins?

About $15,000 a year, in the scenario where buying wins. This is the third path our two-column calculator cannot show on its own, so we built it from the engine’s runs: rent for a while at the rent you would otherwise pay, invest what you are not spending on a house, then buy the same house at that year’s price with the same 20% down, and hold it to the same end date as the person who bought today. Everyone gets the same income and invests whatever they do not spend on housing, so the only thing that differs between the paths is the decision. Here is the $2,800-rent scenario, with prices growing at the model’s default 3% a year and the later purchase at the same 6.5%:

Three things do the damage, and none of them is the rent. The rent is money you would have spent somewhere either way; the model charges the buyer’s carrying cost against it month by month, so it is already netted out. What hurts is that the house got 3% dearer while you waited, that you own it for fewer years before the same end date, and that the down payment and closing costs you eventually pay are bigger — $99,500 after one year against $96,600 today. The break-even year that buying needs to earn back its transaction costs, which when does buying beat renting explains, does not move; you just start it later.

In the default scenario, where renting wins, the same table comes out as a wash: waiting a year at the same rate lands within a few hundred dollars of buying now, because the year of renting is a year of the winning column and the later purchase is a year less of the losing one. Waiting is free there — not lucrative, free. The lucrative outcomes need something to change.

What has to happen for waiting to win?

A lower rate, a lower price, or both — and the size of the drop you need is precise. Holding prices on their 3% path, the rate you would have to get later to make waiting match buying now is about 6.1% after one year, 5.7% after two and 5.1% after three. Holding the rate at 6.5%, prices would have to fall by about 1.1% a year over a one-year wait, 1.5% a year over two, or 2.1% a year over three. Note the asymmetry with the optimistic case people usually run in their heads: a rate cut you hope for has to arrive, and the price has to not rise in the meantime.

Now the rates optimists actually hope for, which are larger cuts than any forecaster currently projects (see when will mortgage rates fall for the vintages):

Even the hopeful case is a rounding error: a half-point drop per year of waiting roughly cancels a year of 3% price growth and a year less in the house. If your reason to wait is “rates will come down,” the honest version is “rates will come down by more than half a point a year, and prices will not move” — and a fixed-rate mortgage bought today keeps the option to refinance if the drop really comes, while waiting gives you no claim on today’s price.

What if prices fall while I wait?

Then waiting wins, and the table tells you by how much. If prices are flat over a one-year wait instead of rising 3%, buying now is still about $4,000 ahead in the $2,800-rent scenario, because you lose a year of ownership and pay the same transaction costs later. If prices drop 5% in that year, waiting finishes about $14,000 ahead; two years of 5% declines, about $21,000 ahead. In the default scenario, where renting was already winning, a flat year makes waiting about $11,000 better than buying now and a 5% dip about $29,000 better.

That is the whole map, and it has no forecast in it. The model does not know whether prices will fall; neither does anyone selling you a house or a mortgage. What it can tell you is the threshold: for a one-year wait in the buy-wins scenario, roughly a 1% price decline or a rate below 6.1% is the point where waiting stops costing money. If you genuinely expect more than that, wait. If you are hoping for it, that is a different thing, and hope is not an input.

Am I ready, or just impatient?

Ready is a separate question from timing, and it is the one people skip. Buying the default home at 20% down takes about $96,600 of cash — the down payment plus closing costs — and the monthly cost of owning it is about $3,067 against $2,115 for the rent-and-insurance column, before any repair bill; the mortgage vs rent calculator shows both numbers for your own price and rent. If those numbers strain you today, the market timing question is moot; the readiness guide walks through the five numbers that decide it, including how long you have to stay for the transaction costs to pay back. Waiting because you are not ready is not a bet on the market. It is the right answer, and it costs nothing if renting is winning at your numbers anyway.

Run your own numbers

Run the scenario where buying wins at today’s rate, then the default where renting wins, and put your own price, rent and quoted rate in place of ours. Then move the rate half a point lower and watch what the verdict does — if it does not flip, rates were never your variable. Every figure on this page, including the cost-of-waiting paths, is computed by the open-source engine documented on the methodology page and guarded by automated tests, so when the survey rate moves, these numbers move with it.

Jonathan Nyst

Jonathan Nyst built RentVsBuyMath as an independent project — for himself first. He spent fifteen years marketing financial products, in banking, fintech and payments at CMO level, which is exactly how he knows what a lead-generation calculator looks like from the inside. This is the calculator without the funnel: he is not a lender, broker or agent, the site takes no referral fees, and nobody is paid more if you decide to buy. The whole model is public — every formula documented on the methodology page, the engine MIT-licensed, covered by automated tests including scenarios computed by hand to check it.

Drafted with AI from the engine's output; reviewed and published by Jonathan Nyst. How this site is made · Corrections