Rent vs Buy

Rent vs buy: the honest analysis

The UK has a deep cultural bias towards homeownership. "Renting is throwing money away" is one of the most repeated pieces of financial advice in the country — and one of the most misleading. Whether buying or renting is better for your wealth depends on a set of assumptions that most people never think to question.

The real cost of buying

When you buy a property, the upfront costs alone are substantial. Stamp Duty Land Tax on a £350,000 home under standard rates is £7,500. Add £2,000 in legal fees and £800 for a survey and you've spent over £10,000 before you've made a single mortgage payment. These costs are gone immediately — you'd need house prices to rise just to recover them.

Then there's ongoing maintenance. Research consistently suggests homeowners should budget 1–2% of property value per year for repairs, redecoration and capital expenditure. On a £350,000 home that's £3,500–£7,000 per year — costs that renters largely avoid.

Why renting isn't "throwing money away"

Rent buys you somewhere to live. So does a mortgage payment — but the interest portion of a mortgage payment is also "gone forever", just like rent. In the early years of a repayment mortgage, the vast majority of each monthly payment is interest. On a £280,000 mortgage at 4.5%, roughly £1,050 of your first monthly payment is interest and only around £340 reduces the debt.

Renters also retain financial flexibility. They're not exposed to a single illiquid asset. A renter with a deposit invested in a diversified portfolio maintains liquidity, geographical flexibility and avoids the concentration risk of having most of their wealth tied up in one property.

Deposit opportunity cost — the number that changes everything

A £70,000 deposit invested in a diversified index fund returning 7% per year grows to approximately £275,000 over 25 years. That's the opportunity cost of using it as a deposit. This calculator models this directly: the renter invests the deposit plus all upfront costs they avoid (SDLT, legal fees, survey), and the total grows at the investment return rate you specify.

This doesn't mean renting always wins — house price growth can also compound powerfully over 25 years. But it does mean the comparison is far closer than the "renting is wasted money" narrative suggests.

What makes buying win

Buying tends to win when: house price growth significantly outpaces investment returns; you stay in the property for a long time (spreading the upfront costs); mortgage costs are close to or below equivalent rent; and the property is in an area with strong long-term price appreciation. High house price growth is the dominant variable — when property rises at 5–6% annually while investments return 7%, the numbers are close.

What makes renting win

Renting tends to win when: investment returns significantly outperform house price growth; you'd only stay for a short period; the rent-to-price ratio is favourable (low rent relative to property values); or when you factor in the drag from high upfront costs, maintenance and mortgage interest. Over short time horizons of 5–10 years, the upfront costs of buying can be hard to recover.

The assumptions that matter most

The single biggest driver of the outcome is the spread between house price growth and investment returns. Change either by 1% and the result shifts dramatically over 25 years. This calculator lets you adjust both — we'd encourage you to run it with pessimistic, central and optimistic assumptions for each scenario to understand the range of possible outcomes. No one knows what house prices or stock markets will do over the next 25 years.

What this calculator doesn't model

This is a simplified comparison. It doesn't account for: capital gains tax on an investment portfolio (though your ISA allowance helps significantly); the emotional value of owning your home; the risk of being asked to leave a rented property; letting agent fees or service charges; or the benefit of forced savings that a mortgage repayment creates for people who wouldn't otherwise save. These are real factors worth considering alongside the numbers.