Rent versus buy: the calculation almost nobody runs before signing

The sentence that costs people the most money

There is a sentence that gets repeated at dinner tables, in group chats, and across every comment section where money is discussed. "Renting is throwing money away." It is said with the confidence of arithmetic and the weight of inherited wisdom, usually by someone who owns a home and feels good about it. And it is, for a very large number of people in a very large number of situations, simply wrong.

The myth survives because it contains a sliver of intuition that feels airtight. When you rent, your monthly cheque disappears and you own nothing at the end. When you buy, your monthly payment builds equity in an asset that is yours. One feels like pouring water into sand; the other feels like filling a bucket. The trouble is that this intuition quietly assumes that the entire mortgage payment is "building equity," that the home will reliably appreciate, that the money you would have invested instead earns nothing, and that you will stay in the house long enough for any of it to matter. Loosen any one of those assumptions and the picture changes. Loosen all four, as reality usually does, and the confident sentence collapses.

This is not an argument that renting is always better, or that owning is a mistake. It is an argument that the question deserves an actual calculation rather than a slogan, and that the calculation almost nobody runs before signing turns on three things the slogan ignores entirely: the opportunity cost of the money you tie up, the transaction fees you pay to get in and out, and the length of time you genuinely intend to stay. Get those three right and the rest is just careful bookkeeping.

We will build that calculation from the ground up, using representative figures from the middle of 2026, and we will be honest about where each assumption could tip the answer the other way.

Part one: why the slogan is wrong

A mortgage payment is not one thing

The first error buried in "renting is throwing money away" is treating a mortgage payment as a single block of wealth-building. It is not. A mortgage payment splits into pieces, and only one of those pieces becomes equity.

When you make a mortgage payment, part of it pays down principal, which genuinely becomes your equity. But another part pays interest to the bank, and in the early years of a loan that interest portion is enormous. A further set of costs sits alongside the mortgage entirely: property taxes, homeowners insurance, maintenance, and possibly mortgage insurance and fees. None of those build equity. They are, in the language of this analysis, unrecoverable. They vanish exactly as a rent cheque vanishes, except you are now also responsible for the roof.

The honest comparison is not rent versus the whole mortgage payment. It is the unrecoverable cost of renting versus the unrecoverable cost of owning. Once you frame it that way, the gap that the slogan imagines between the two narrows dramatically, and in many markets it closes or reverses.

Where a mortgage payment actually goes — $343,200 loan at 6.5%

The money you do not spend is not nothing

The second error is the quiet assumption that a renter's money simply evaporates while an owner's money compounds. In reality, the renter is sitting on a large pile of capital that the owner has handed to a closing agent: the down payment. On a median-priced home, a 20% down payment is roughly 86,000 dollars. That money does not have to sit idle. Invested in a diversified portfolio, it works.

This is the concept of opportunity cost, and it is the single most overlooked figure in the entire debate. The owner's down payment is locked into an illiquid asset that, on a long-run real basis, has historically appreciated only modestly. The renter's equivalent capital can be invested in stocks and bonds that, even on cautious forward-looking estimates, are expected to return more than home equity does after inflation. A renter who invests the down payment, and the monthly difference between renting and owning, is not throwing money away. They are holding a liquid, diversified, growing asset. The slogan never accounts for this because the slogan was invented before anyone did the maths.

The home does not always go up

The third error is the boom-era assumption that home prices reliably climb fast enough to rescue the buy case. For a stretch around 2020 to 2022, they did, and a generation absorbed the lesson that property only goes up. The middle of 2026 tells a different story. National home prices have hit record highs in nominal terms, but their rate of increase has slowed below inflation, meaning that in real, purchasing-power terms homes have been losing ground. Broad price indices are showing the weakest annual gains in years, and several large metros are posting outright declines.

When appreciation runs at three or four percent, barely keeping pace with or trailing inflation, the buyer loses the very engine that the slogan implicitly relies on. Equity from appreciation slows to a trickle, and the buyer is left leaning on principal paydown alone to justify all those unrecoverable costs.

Part two: the three numbers that actually decide it

Strip away the emotion and the rent-versus-buy decision rests on three pillars. Get these three right and you have your answer; everything else is detail.

Pillar one: opportunity cost

Opportunity cost is what your money could have earned somewhere else. For the home buyer, the relevant capital is the down payment plus the closing costs plus, arguably, the extra each month that ownership costs above renting. For the renter, that same capital can go into the market.

The crucial input here is the expected rate of return, and this is where honesty matters enormously. It is tempting to reach for the long-run historical stock return of roughly ten percent nominal. But the major forecasters are far more cautious about the decade ahead. Some house-view estimates for large-cap stocks over the next ten to fifteen years sit in the mid-single digits rather than the low teens, with balanced portfolios of stocks and bonds projected in the low-to-mid six percent range. Even a risk-free high-yield savings account or short government bond was paying in the neighbourhood of four to five percent in mid-2026. The point is not to pick a single magic number but to use a defensible one. An honest calculation uses something like five to six percent for a diversified portfolio, not the boom-era ten, and it certainly does not assume the renter's money earns zero.

The down payment, invested — $85,800 over 30 years

Pillar two: transaction fees

Buying and selling a home is extraordinarily expensive, and these costs are pure unrecoverable friction. On the way in, a buyer typically pays closing costs of roughly two to five percent of the purchase price: loan origination, appraisal, title insurance, recording fees, and prepaid taxes and insurance. On the way out, a seller typically pays something closer to eight to ten percent once agent commissions, title insurance, transfer taxes, and escrow are tallied.

Many people assumed a 2024 legal settlement that changed how agent commissions are advertised would slash these fees. As of 2026, it largely has not. Total commissions have stubbornly held near five and a half to six percent in practice, even though they are now explicitly negotiable. Add it all together and the round-trip cost of buying a home and later selling it lands at roughly eight to eleven percent of the home's value. On a median-priced home that is something like thirty-five to forty-seven thousand dollars in pure friction — money you must claw back through appreciation and equity buildup just to draw level with having rented. This single fact is why short stays favour renting so overwhelmingly, which brings us to the third pillar.

You start the ownership race tens of thousands of dollars behind the renter. The closing costs calculator itemises the buy side for your own price and location.

Pillar three: how long you actually stay

Because transaction costs are front-loaded and early mortgage payments are mostly interest, ownership only pays off if you stay long enough for slow equity buildup and modest appreciation to overcome that initial friction. This is the breakeven horizon, and it is the most decision-relevant number in the entire analysis.

In the cheap-money era, the rule of thumb was that you needed to stay around five years for buying to beat renting. At mid-2026 mortgage rates near six and a half percent, with transaction costs as high as they are and appreciation as slow as it is, that horizon has stretched. Depending on the metro and the assumptions, breakeven now commonly falls somewhere between roughly six and ten or more years. Some national estimates put it just under six years with realistic inputs; others, accounting for high friction and muted appreciation, push it well past a decade. The sensitivity to interest rates is dramatic: at a hypothetical four percent mortgage, breakeven would collapse back toward three to five years.

The practical implication is blunt. If there is a meaningful chance you will move within five years, the maths says rent, almost regardless of the market. The transaction costs alone will eat any equity you manage to build in such a short window.

The breakeven horizon — owner's wealth advantage over the renter

Part three: two shortcuts that get you 90 percent of the way

Running a full year-by-year model is the gold standard, and we will build one in the next section. But two well-known shortcuts can tell you almost instantly which side of the line you are likely on.

The price-to-rent ratio

The cleanest one-number test is the price-to-rent ratio: take the price of a home and divide it by the annual rent for a comparable property. The interpretation, which traces back to indices built in the early 2010s, runs roughly like this. A ratio of fifteen or below means owning is clearly cheaper. A ratio of sixteen to twenty means owning is more expensive but may still make sense depending on your situation. A ratio of twenty-one or above means owning is much more expensive than renting, and renting is very likely the better financial move.

The long-run average sat around fifteen before the 2008 bubble. By mid-2026 the national figure had drifted meaningfully higher, into the high teens, placing the country as a whole in renter-favourable territory. But the national number hides everything interesting, because the variation between metros is enormous.

Ratios vary by methodology and sources disagree on individual cities, so treat these as directional rather than precise. The lesson is that there is no national answer: in San Jose the maths makes renting nearly unavoidable as the better deal, while in Detroit or Cleveland buying wins easily.

The price-to-rent map of the country

The five percent rule

The second shortcut reframes the whole decision around unrecoverable costs in a single tidy heuristic. The idea, popularised in 2019, is that the unrecoverable annual cost of owning a home runs to roughly five percent of the home's value, made up of about one percent for property tax, about one percent for maintenance, and about three percent for the cost of capital, which blends the interest on the mortgage with the opportunity cost of the equity tied up.

The shortcut: multiply the home's price by five percent, then divide by twelve to get a monthly figure. If you can rent a comparable home for less than that figure, renting is the financially better choice and you should invest the difference. If comparable rent is higher, buying wins.

There is an important 2026 wrinkle. The rule was built when mortgage rates were near three percent. With rates now closer to six and a half percent, the cost-of-capital component is higher, which arguably pushes the rule toward five and a half or even six percent for many buyers, raising the bar that buying has to clear.

Find your price point, read across to the monthly break-even rent, and compare it with what a comparable home actually rents for. If real rent sits below that figure, renting wins on the maths. As a thirty-second gut check it is remarkably clarifying, and it demolishes the "the mortgage is about the same as rent, so I should buy" fallacy by reminding you that the mortgage is not the unrecoverable cost.

Part four: a worked example, end to end

Shortcuts point the direction; a full model gives the magnitude. Let us run the complete calculation for a representative mid-2026 buyer and an otherwise identical renter, then watch the answer flip as we change a single assumption.

The setup

Our buyer is purchasing the median-priced home at roughly 429,000 dollars. They put twenty percent down — about 86,000 dollars — and finance the rest with a thirty-year fixed mortgage at the prevailing rate of around six and a half percent, a monthly payment of about 2,170 before taxes and insurance. They pay closing costs on the way in, owe property tax at roughly one percent of value, homeowners insurance, and maintenance budgeted at one percent of value per year, and expect the home to appreciate at around four percent annually.

Our renter leases a comparable home for about 2,300 dollars a month — a price-to-rent ratio near fifteen and a half. Crucially, and this is what makes the comparison honest, the renter invests the money the buyer sank into the down payment and closing costs, plus any month in which owning costs more than renting, into a diversified portfolio expected to return around six percent.

The renter's investment assumptions are the part most people forget — and omitting them is exactly what rigs the comparison in favour of buying.

Year by year

With the inputs fixed, the model runs each year in parallel. For the buyer, it tracks the mortgage split into principal and interest, adds the unrecoverable costs of tax, insurance, and maintenance, grows the home's value by the appreciation rate, and computes net wealth as home equity minus the selling costs they would pay if they sold that year. For the renter, it tracks rent paid, grows the invested portfolio by the return rate, and computes net wealth as the portfolio value.

Watch the bottom row. The renter leads comfortably for the first seven years; the gap narrows steadily; and ownership pulls ahead only in year eight, after which it widens in the owner's favour.

Net wealth over time — owner versus renter

The flip

Now change one number. Hold everything else constant and move the buyer's stay from ten years to four. The home has barely appreciated in that window, the mortgage payments have been mostly interest, and the buyer must pay eight percent in selling costs to get out. The renter, meanwhile, has had their down payment compounding the entire time. At four years, in this scenario, the renter is ahead by about 26,000 dollars. The only thing that changed was the length of stay, and it reversed the verdict completely. That is the power of the third pillar, and it is exactly the variable the slogan never asks about.

Sensitivity — how far each assumption swings the verdict

Part five: the things the spreadsheet cannot capture

A purely financial model, however careful, leaves out forces that genuinely move the decision. Ignoring them would be its own kind of dishonesty.

Forced savings is real

The strongest real-world argument for buying is not in any of the maths above. It is behavioural. A mortgage is a commitment device. Every month, whether or not you have any discipline, a slice of your payment is converted into equity. The renter's case depends entirely on actually investing the difference, and an enormous share of renters simply do not. They rent the comparable home, spend the savings, and invest nothing. For that person, the homeowner's forced savings wins almost by default — not because owning is mathematically superior but because the alternative plan was never executed. If you know yourself to be a spender rather than a saver, that self-knowledge belongs in the decision.

Leverage cuts both ways

A mortgage is leverage, and leverage amplifies outcomes in both directions. With twenty percent down, a ten percent rise in the home's value is a fifty percent return on your invested equity, a spectacular result that no unleveraged portfolio easily matches. But a ten percent fall wipes out half your equity just as fast, and unlike a stock portfolio you cannot trim the position. Leverage is the buyer's single biggest financial edge and simultaneously their biggest risk, and which one it turns out to be depends on a price path nobody can predict. The real-estate ROI calculator shows how leverage magnifies the return on your actual cash invested.

Liquidity, flexibility, and the value of staying put

Home equity is illiquid and expensive to access; a portfolio can be sold in a day. The renter buys flexibility and mobility, the freedom to take a job in another city or absorb a change in life circumstances without a six-figure transaction. The owner buys stability and control, protection from rent increases, the ability to renovate, and the intangible but real value of a permanent home. None of these line items fits cleanly in a spreadsheet, and yet for many people they are the deciding factors, which is entirely legitimate. The mistake is not weighing them. The mistake is letting them masquerade as the financial argument when they are really a lifestyle one.

Part six: the decision, distilled

Here is the whole thing reduced to a workable process. When you are deciding whether to rent or buy, do not start with a feeling and do not start with the slogan. Start with three questions, in order.

First, how long will you realistically stay? Be honest, and if there is a meaningful chance it is under five years, you can almost stop here: rent. The transaction costs alone will defeat a short stay in nearly any market at mid-2026 rates.

Second, what is the price-to-rent ratio where you live? Take a home you would actually buy, divide its price by the annual rent on a comparable place, and read the verdict. Below fifteen, buying is likely the better deal. Above twenty-one, renting almost certainly is. In between, you have earned the right to run the full model.

Third, what will you do with the money you do not spend? If you buy, you accept the forced-savings discipline automatically. If you rent, your entire financial case rests on actually investing the down payment and the monthly difference. If you will not do that, be honest with yourself, because the renter's advantage exists only on paper unless the paper becomes a brokerage statement.

If most answers point one way, you have your decision. If they are split, the money is close to a wash and lifestyle should decide. Run those three questions, layer in the five percent rule as a sanity check, and weigh the lifestyle factors openly rather than letting them hide inside the financial argument. Do that, and you will have done the calculation almost nobody runs before signing. The rent vs buy calculator does the year-by-year arithmetic for your own numbers, and the home affordability calculator tells you what you could borrow in the first place.

The honest verdict

Renting is not throwing money away. Renting is buying flexibility, liquidity, and freedom from a large leveraged bet, while paying for a place to live — exactly as a homeowner pays for a place to live through interest, taxes, insurance, and maintenance that build no equity at all. Owning is not a guaranteed path to wealth. Owning is a leveraged, illiquid, transaction-heavy commitment that rewards people who stay put for a long time in the right market and punishes people who move too soon or buy where the price-to-rent ratio is stretched.

The reason the slogan persists is that it is simple and that, for the specific person who buys in a buyer-favourable market and stays for twenty years, it happens to be true. But it is sold as a universal law when it is really a conditional outcome, and the conditions are precisely the three numbers it never mentions: what your money could earn elsewhere, what it costs to get in and out, and how long you will actually stay. Run those, and you will sometimes find that buying is the clear winner, and you should buy with confidence. You will just as often find that renting leaves you wealthier, freer, and entirely unbothered by the dinner-table certainty of people who never ran the numbers themselves.

The calculation is not hard. It is just rarely done. Do it before you sign.