Renting vs. buying a home

Anna is 29 and pays €900 a month in rent. At every family dinner her uncle delivers the same verdict: "You are throwing money away. Buy something." Her colleague, who spent last weekend fixing a boiler in the apartment he owns, delivers the opposite one: "Don't. A house is a millstone. I am poorer and less free than the day I signed."

Both of them sound certain. Both of them are selling certainty about Anna's life that they do not have. Neither of them has asked where she wants to live in five years, what her career needs, or what the actual numbers in her actual city say.

Renting versus buying is the most tribal argument in personal finance, and the tribalism survives because both sides treat a life decision as a trade. It is not a trade. It is a decision about how you want to live, with a financial component attached, and the financial component can be worked out honestly with the arithmetic you already know from this series. This article will not tell you which to do. It will give you the honest numbers, the honest questions, and the tools to run the comparison yourself. That is more useful than a verdict, because the verdict depends on inputs only you have.

Rent is not thrown away

Start by killing the slogan, because everything downstream of it is confused. "Rent is throwing money away" is wrong as stated. Rent buys you something real: a roof, a location, heat in winter, a landlord's problem when the boiler dies. You consumed housing, and you paid for it, the same way you pay for food without calling groceries "throwing money away."

Here is the part the slogan hides: a large slice of what an owner pays every month buys exactly the same thing. Mortgage interest, property taxes, insurance, maintenance. None of that builds wealth. It buys the owner housing, precisely as rent buys the renter housing. The money is gone either way.

So the meaningful comparison is never rent versus mortgage payment. A mortgage payment is a mix of two very different things: interest, which is a cost, and principal repayment, which is savings, money moved from your pocket into a wall you own. Comparing rent to the whole payment counts the owner's savings as if it were a cost, and that error flatters buying every time.

The clean way to think about it, a framing popularized by the Canadian portfolio manager Ben Felix, is unrecoverable costs: money that leaves your life and never comes back, under either choice. For the renter, that is the rent. For the owner, it is a longer list. Compare the two totals and you are finally comparing like with like.

What owning actually costs

The owner's unrecoverable costs come in five parts. Itemise them honestly, because sellers of both slogans tend to hide two or three.

Mortgage interest. The cost of renting money from a bank. On a typical annuity mortgage the early years are mostly interest; only the principal part of each payment is yours.

Transaction costs. In much of the EU, buying costs several percent of the price: transfer tax or VAT, notary fees, land registry, often an agent. These are paid once but consumed over your whole stay, so the honest move is to amortise them, spread them across the years you expect to live there. Stay long and they shrink per year. Stay briefly and they are enormous per year.

Maintenance. Things break, and now they are your things. A common rule of thumb, and it is only a rule of thumb, is roughly 1% of the property's value per year, averaged over time. Some years nothing, some years a roof.

Property taxes and insurance. Smaller lines, but annual, and they never stop.

The deposit's forgone growth. This is the one almost nobody counts. The deposit is money you could have invested instead. Assume 7% a year, roughly the long-run average of a broad stock index; an illustration, not a promise. A €50,000 deposit that could have grown by €3,500 in a year has a real cost of €3,500 that year, even though no invoice ever arrives for it. Economists call this opportunity cost: the value of the best alternative you gave up.

One year, side by side

Now a concrete case, Anna's case. A €250,000 apartment, bought with €50,000 down and a €200,000 mortgage at an assumed 3.5% over 25 years, versus renting a similar apartment for €900 a month. Assume buy-side transaction costs of 8% (€20,000), amortised over a ten-year stay, €800 a year for property tax and insurance, and the rules of thumb above.

First, the trap. The mortgage payment works out to about €1,001 a month. Next to €900 rent, the naive comparison whispers: for one hundred euros more, it is yours. But in year one only about €6,900 of that payment is interest; roughly €5,100 is principal, which is savings, not cost. Strip the savings out and count everything honestly:

In this example, renting costs €4,900 a year less. So renting wins? No. This example says renting wins at these inputs. Change the inputs and the answer flips. If a similar apartment rents for €1,400 a month, the renter's unrecoverable cost is €16,800 and buying wins. If Anna stays 25 years, the €20,000 of transaction costs falls to €800 a year and the owner's total drops to €14,500. Cheaper prices, higher rents, lower mortgage rates, longer stays: each moves the answer, and in some cities and some years each side of this table has genuinely been the cheaper one.

Notice also what the table deliberately leaves out: any assumption about where house prices go next. Both slogans smuggle in a price forecast, "it always goes up" or "it is about to crash." This series does not predict prices, and neither should the person selling you either slogan.

Leverage cuts both ways

There is one more thing the table cannot show, and it is the thing almost every "property always wins" story quietly relies on. A mortgage is leverage: borrowed money multiplying your exposure to an asset's price. It is the one place ordinary people routinely take 5-to-1 or even 10-to-1 leverage, and would call you insane for doing the same with stocks.

Anna's €50,000 deposit controls a €250,000 apartment. That is 5-to-1. If prices rise 10%, the apartment gains €25,000 and her €50,000 stake is up 50%. This is why property genuinely made some families wealthy: modest percentage gains, multiplied by leverage, on the largest purchase of their lives.

Now run it the other way. If prices fall 10%, she loses €25,000, half her deposit. If they fall 20%, the entire €50,000 is gone, and with a smaller deposit she would owe more than the home is worth. The multiplication does not care about direction. The same arithmetic that built wealth in rising markets destroyed households in 2008, when leveraged buyers discovered that a fall can exceed your entire stake; we walked through that machine, including a 10-to-1 example, in Manias V: 2008.

Leverage is not a reason never to buy. It is a reason to stop pretending buying is the safe choice and renting the reckless one. A leveraged purchase is, mechanically, the riskiest financial position most people will ever hold. Sometimes it is still the right one. Just sign knowing what you signed.

When buying tends to win

Honestly, then, the cases where the arithmetic and the life both lean toward buying.

A long horizon in one place. Transaction costs amortise. €20,000 spread over 25 years is noise; over three years it is a disaster. If you can say with a straight face that you will be in the same city, plausibly the same home, for a decade or more, the biggest cost of buying mostly dissolves.

Stability you value for its own sake. Schools, kids, roots, the right to paint a wall and plant a tree, never being asked to leave because the owner's nephew needs a flat. These are real returns. They just pay in life, not euros, and it is entirely legitimate to pay money for them, as long as you notice that is what you are doing.

The forced-savings effect. Every principal payment is saving, and it happens automatically, under threat of losing the house, which is the strongest commitment device most people will ever face. For someone who would otherwise not save at all, and we have seen how reliably people fail to save on willpower alone, a mortgage quietly builds wealth that good intentions never would. This is a psychological argument, not a mathematical one, and for many people it is the strongest argument on the page.

Protection from rent risk. A fixed-rate mortgage locks your housing cost for decades. Rents can rise, and landlords can sell, renovate, or reclaim. Owning is insurance against other people's decisions.

When renting tends to win

And the honest other side.

Mobility. Early in a career, the ability to take the better job in another city can be worth more than any plausible property gain. A renter moves with a month's notice. An owner moves by paying transaction costs twice and hoping the market cooperates with their timing.

Short or uncertain horizons. If the honest answer to "where will you be in five years" is a shrug, the amortisation math is brutal, as the next section shows.

The freedom to invest the difference. In our table the renter is €4,900 a year better off. Invested at the same assumed 7%, that gap compounds into serious money over decades. But this argument comes with the caveat that decides whether it is real: renting only wins financially if you actually invest the difference, automatically, the same week it appears, the way this series set up in conscious spending. If the difference quietly evaporates into lifestyle, the buyer's forced savings beat the renter's good intentions, and the slogan about throwing money away becomes true after the fact, just not for the reason your uncle said.

The five-year test

Out of all of this falls one widely used rule of thumb, and it earns its keep. With costs of several percent to buy and several more to sell, a round trip through ownership can consume close to a tenth of the property's value before anything else happens. In our example, €20,000 of buy-side costs spread over a three-year stay is about €6,700 a year, more than the interest, before selling costs are even counted.

So: if your honest horizon is under roughly five years, buying is hard to justify on arithmetic alone, and the shorter the stay, the harder it gets. This is a rule of thumb, not a law. It bends with your country's transaction costs and it says nothing about the life reasons to buy anyway. But if a five-year commitment feels unrealistic when you say it out loud, the numbers are trying to tell you something.

A one-paragraph sanity check: price-to-rent

One more tool for your pocket. The price-to-rent ratio is a home's price divided by the annual rent of similar homes. Anna's example: €250,000 divided by €10,800 is about 23, meaning buyers are paying 23 years of rent for the building. At €1,400 rent the same price is a ratio of about 15. There is no magic threshold, and this is a sanity check, not advice. But the logic is useful: when the ratio in your city is very high by its own history, buyers are paying a great deal for the privilege of owning rather than renting the identical roof, and the unrecoverable-cost table will usually tilt toward renting. When it is low, the reverse. It is a thermometer, not a verdict.

Decide the life first

Here is the closing honesty, and it cuts against both tribes at once. The home you live in is never purely an investment. It is consumption, the housing you use up every year. It is identity, the place your kids call home. It is security, the door nobody can ask you to leave from. Pretending it is only a financial asset corrupts the decision in both directions: it makes buyers overpay for "an investment" that is mostly a lifestyle, and it makes renters feel like failures for correctly choosing flexibility.

So run the decision in the right order. First the life question: where do you want to be, for how long, with whom, and how much do you value roots over options? That question has no spreadsheet. Then, and only then, the arithmetic, whose proper job is not to pick your life but to veto the unaffordable versions of it. If the life you want survives the unrecoverable-cost table and the leverage math at your real numbers, buy it or rent it with a clear conscience, and never let a slogan at a family dinner tell you that you chose wrong.

Do this now

Build your own version of the table, for your actual city, this week. It takes about an hour. Find three real listings for sale and three for rent in the neighbourhood you would actually live in. Look up your country's buy-side transaction costs and a current mortgage rate. Then fill in the six rows: rent on one side; interest, amortised transaction costs, 1% maintenance, taxes and insurance, and 7% of the deposit on the other. You will end the hour with something almost nobody at that family dinner has: your own numbers, for your own life, instead of somebody else's slogan.

Related reading: Inflation, time, and the power of compounding, the arithmetic this article leans on.