"Rent is dead money" is the most repeated — and most incomplete — sentence in British property. The honest comparison is not rent vs mortgage payment; it is rent vs the unrecoverable costs of owning. Sometimes buying wins decisively. Sometimes it genuinely does not.
Owning Has Dead Money Too
- Mortgage interest: on a £220,000 loan at 4.5%, year-one interest is ~£9,800 — dead money, exactly like rent
- Maintenance: budget 1% of property value per year (boilers, roofs, damp — surveyors see it all)
- Buying/selling costs: stamp duty, legals and agent fees eaten every time you move
- Opportunity cost: your deposit could compound in investments instead
What Buying Actually Buys
The capital portion of each payment is forced saving into an appreciating (usually) asset. Fixed housing costs immune to rent inflation. Security of tenure. Freedom to renovate. After the mortgage ends, housing at near-zero cost for life — the true pension most homeowners rely on.
The Crossover
Rough rule: if annual rent exceeds ~5% of the equivalent property price, buying likely wins financially; below 3–4%, renting plus investing the difference can genuinely compete — if you actually invest the difference, which is where the theory usually dies.
The Real Answer
Time horizon decides. Staying under 5 years, transaction costs alone usually favour renting. Over 10 years, forced saving and rent-inflation immunity are very hard to beat.