Renting vs Buying: The Honest Comparison

Buying is not automatically better and renting is not throwing money away. The answer depends on how long you will stay, and on numbers most comparisons leave out.

The 'dead money' argument, examined

The claim is that rent disappears while mortgage payments build ownership. Half of that is true.

In the early years of a repayment mortgage, most of each payment is interest, not capital. On a £250,000 mortgage at 4.5 % over 25 years, the first year's payments total about £16,700, of which roughly £11,000 is interest. That £11,000 is paid to the bank and buys nothing — it is exactly as “dead” as rent.

Only the capital portion builds equity, and it starts small. Over a full term the picture reverses, but someone who moves after four years has paid a great deal of interest and built comparatively little equity.

The honest version of the comparison is: rent versus the total unrecoverable cost of owning — interest, maintenance, insurance, property tax and transaction costs — adjusted for equity built and any change in the property's value.

The costs of each

Buying costs typically 3–5 % of the purchase price upfront and 1–3 % to sell. Around 5–8 % of the value therefore disappears in transaction costs across a purchase and a sale. That is the hurdle any price appreciation has to clear before ownership has beaten renting on cash terms, and it is why short ownership periods usually lose.

Maintenance is the cost most consistently underestimated. A common planning figure is 1 % of the property value per year averaged over time — £2,500 on a £250,000 home. It arrives unevenly: nothing for three years, then a boiler and a roof.

When each makes sense

Renting is usually better when:

• You might move within about five years — for work, study or personal reasons.
• Your income is variable or your job is insecure.
• You do not have a deposit plus an intact emergency fund plus the transaction costs.
• Local rents are low relative to prices, which is a genuine signal.
• You want flexibility and would rather not be responsible for a roof.

Buying is usually better when:

• You will stay ten years or more.
• Your income is stable and the payment is comfortably affordable at a stress-tested rate.
• You want security of tenure and the freedom to alter the property.
• The mortgage payment is close to or below local rent for an equivalent home.

A useful screen is the price-to-rent ratio: annual rent divided into the purchase price. Below about 15 tends to favour buying; above about 20 tends to favour renting. It is a rough guide, not a rule, and local specifics matter.

What the spreadsheet cannot capture

Much of this decision is not financial, and pretending otherwise is a mistake.

Ownership provides security of tenure — nobody can end your tenancy because they want to sell. It provides control over the property. It provides a forced saving mechanism, which genuinely helps people who would not otherwise save. And it provides certainty of housing cost in later life, which matters a great deal in retirement.

Renting provides flexibility, freedom from maintenance responsibility, and the ability to live in areas you could not afford to buy in. It also avoids concentrating a very large share of your net worth in one illiquid asset in one location.

That last point is worth stating plainly: for most homeowners, the house is by far the largest holding they will ever have, it is entirely undiversified, and it is tied to one local economy. That is a real risk, and the standard framing of ownership as unambiguously safe obscures it.