The leverage maths the REIT case has to skip past
Take the partner article's £100,000. Buy a £400,000 flat with a £300,000 buy-to-let mortgage at today's typical 5.5% rate. Hold it for 10 years. Assume modest 3% per year capital growth — below the 10-year ONS HPI average — and the property is worth £537,500. Your £300,000 mortgage has paid down to £290,000 if interest-only with £10,000 of principal contributions, or to £230,000 if you took a 25-year capital-and-interest BTL. Equity has grown from £100,000 to £247,500-£307,500.
Now do the same exercise with the £100,000 in REITs. Assume a long-run 7% total return — the long-run UK equity total-return average. After 10 years the position is worth £196,700. That's a £96,700 capital gain on a starting £100,000 — admirable, tax-free inside an ISA, no work. But it's roughly half what the leveraged property position generated.
This is not a marginal advantage. It is the entire reason a generation of UK landlords with one or two properties became millionaires while the equivalent ISA savers became merely comfortable. Leverage is the engine. Strip it out and you're comparing a Ferrari to a Vauxhall on equal-terms acceleration — the comparison is rigged. The right comparison is per-pound-of-cash-deployed, and per-pound, leveraged BTL beats unleveraged REITs over any UK property cycle in which house prices grow at all.