Learn · Money, in practice
Renting and buying, as arithmetic
Not a moral question and not a universal answer. It is a calculation with several inputs people routinely forget.
The comparison is almost always framed as rent against mortgage payment. That framing is wrong, and it is wrong in a direction that flatters buying.
The costs of ownership that are not the mortgage
- Maintenance. Roofs, boilers, damp. A renter's landlord pays these; an owner does.
- Property taxes and insurance. Recurring, and they rise.
- Transaction costs. Buying and selling both cost real money, which is why short holding periods are expensive.
- The interest portion of the payment. Early in a mortgage most of the payment is interest, which builds no equity — it is the cost of borrowing, structurally similar to rent.
Interpretation
Interest is rent paid to a bank rather than to a landlord
The phrase “rent is dead money” is applied to the tenant's payment and almost never to the interest half of a mortgage payment, which is equally unrecoverable. Both buy shelter for a period. Only the capital repayment portion builds ownership.
The phrase “rent is dead money” is applied to the tenant's payment and almost never to the interest half of a mortgage payment, which is equally unrecoverable. Both buy shelter for a period. Only the capital repayment portion builds ownership.
The input most often missed
The deposit has an opportunity cost. Money used for a deposit is money not invested elsewhere, and a complete comparison has to account for what it might otherwise have earned.
What genuinely favours buying
- Long time horizons. Transaction costs are amortised over more years.
- Fixed housing cost. A fixed-rate mortgage freezes a large expense while rents move with inflation.
- Forced saving. Capital repayment happens whether or not you would have had the discipline.
- Control. You may alter the property and cannot be asked to leave.
What genuinely favours renting
- Mobility. The ability to move for work is worth real money in a career.
- No exposure to one asset. A house is a large, undiversified, illiquid holding in one location.
- No maintenance risk. Someone else absorbs the variance.
Fact
A home is consumption and investment at the same time
You live in it and you own it. Analyses that treat it purely as an investment ignore the shelter it provides; analyses that treat it purely as consumption ignore the equity. Both halves are real, which is why the comparison resists a single answer.
You live in it and you own it. Analyses that treat it purely as an investment ignore the shelter it provides; analyses that treat it purely as consumption ignore the equity. Both halves are real, which is why the comparison resists a single answer.
The honest version of this calculation is sensitive to local prices, local rents and your own holding period. Anyone giving a universal answer has stopped doing arithmetic and started expressing a preference.
Education, not advice. These lessons explain how things work. They do not tell you what
to buy, and Wealth Signal does not publish recommendations. Full disclaimer.