Compare costs that do not come back
Rent is an unrecoverable housing cost: it pays for the use of a home for a period. Ownership has unrecoverable costs too, including mortgage interest, maintenance, insurance, transaction costs and the return forgone on cash tied up in a deposit.
The principal part of a mortgage payment builds equity. Treating the full mortgage payment as a cost overstates the price of ownership, while ignoring repairs and buying fees understates it.
What buying offers
Ownership can build equity through principal repayments and changes in the property’s value. It also gives a household greater control over the space and protection from a landlord ending the tenancy, subject to meeting mortgage and ownership obligations.
Buying concentrates money in one property and comes with large entry and exit costs. A short stay gives those costs little time to spread out, which is why the intended time in the home matters so much.
What renting offers
Renting provides mobility and shifts many repair costs to the landlord. A renter may also keep a potential deposit invested or in cash and could invest any monthly saving compared with the all-in cost of ownership.
‘Rent and invest the difference’ is an assumption, not an automatic benefit. It only improves the renter’s projected wealth if the deposit and monthly difference are genuinely retained and earn the modelled return. Rent increases, moving costs, investment volatility and tax can change the outcome.
Run a matched comparison
Use the same time horizon for both paths. For buying, include the deposit, mortgage, stamp taxes where relevant, legal and survey costs, maintenance, insurance, selling costs and an assumption for property growth. For renting, include the deposit, rent changes and the return on invested cash.
Then test the assumptions that carry the result: the length of stay, mortgage rate, rent growth, property growth, maintenance and investment return. The financial answer sits alongside lifestyle value, security and flexibility.
Sources and further reading