Buying
Buying versus renting is arithmetic, not a proverb
Dead money is a slogan. The comparison is a sum with transaction costs, forgone returns and a time horizon in it.
The options around the buy-versus-rent calculation are set out side by side below, with the conditions that genuinely favour one over the other.
The difference in one place
- Capital repayment is saving, not a cost, and belongs in neither column.
- The deposit has a forgone return that is a real cost of owning.
- Transaction costs are paid twice and are only amortised by time.
Put both columns on the same basis
Renting costs rent, contents insurance and the price of moving each time a tenancy ends. Owning costs mortgage interest, maintenance, buildings insurance, any recurring property tax and any service charge. Capital repayment belongs in neither column as a cost, because it converts cash into equity rather than consuming it.
Comparing the whole mortgage payment against rent overstates owning; comparing interest alone understates the cash you must actually find each month.
The deposit is not free money
Capital sitting in a house is capital not earning anything else, and that forgone return is a genuine cost of ownership. A renter who invests the same sum is running a different portfolio rather than simply wasting money. How large that cost is depends entirely on what the money would otherwise have earned, which nobody knows in advance.
In practice, assume a decent return and the comparison tilts towards renting; assume none and it tilts the other way, which is how the deposit assumption quietly decides many answers.
Transaction costs are paid on the way in and the way out
Buying attracts transfer taxes, legal fees, search fees, survey fees and lender charges, in a mix that differs enormously between countries. Selling attracts agency fees, further legal fees and in some places another tax, so one episode of ownership pays at both ends.
In practice, none of it is recovered until price growth has exceeded it, which is a matter of elapsed time rather than luck. This is the largest single reason short ownership is expensive, and it is invisible on any monthly comparison.
The horizon does most of the work
Spread over two years, one-off costs are a heavy annual charge; spread over fifteen, they are a light one. The break-even point is the year at which cumulative ownership cost drops below cumulative renting cost. Because the costs are front-loaded and the benefits accrue slowly, the honest answer for a two-year stay and a twenty-year stay is often opposite.
How long will you stay is therefore a better opening question than whether rent is wasteful.
Name the assumption that flips it
Price growth, rent growth, the interest rate, the return on the deposit and the maintenance figure each move the result independently. Change one materially and the crossover year can move by several years, which is why two honest calculations reach opposite conclusions.
The discipline that helps is writing the assumptions down and then testing whether the answer survives changing each one. If it does not survive, you have learned the decision is finely balanced rather than obvious, which is itself worth knowing.
None of this is a substitute for talking to a clinician if something feels wrong.
What the sum will not tell you
Security of tenure, freedom to alter a property and the ability to leave at short notice are real and awkward to price. Renting buys optionality; owning buys control and removes optionality, because selling takes months in most markets. A calculation that lands close is telling you the decision is not a financial one, which is a legitimate result.
This is general information rather than advice, and a regulated adviser can model your own figures properly.
Side by side
| Consideration | What it means in practice |
|---|---|
| Put both columns on the same basis | Capital repayment is saving, not a cost, and belongs in neither column. |
| The deposit is not free money | The deposit has a forgone return that is a real cost of owning. |
| Transaction costs are paid on the way in and the way out | Transaction costs are paid twice and are only amortised by time. |
The takeaway
Write the assumptions down, find the crossover year, then check which single assumption is doing the work.
Pick the one that costs you least, and let the rest wait.
Questions readers ask
Is rent really dead money?
No more so than mortgage interest, which also buys occupation and builds no equity. The honest comparison is total cost against total cost, not rent against the whole mortgage payment.
How many years does buying take to beat renting?
There is no universal number. It depends on your local transfer taxes, fees, rent levels and interest rates, so the figure has to be calculated for your own market.
