Rent vs Buy in 2026: the Honest Maths

"Rent is dead money" is the most repeated and least examined sentence in British personal finance. It survives because it contains a grain of truth and because the alternative is so emotionally loaded. But treated as a financial question rather than a cultural one, rent versus buy is simply a comparison of two costs, and most people compare the wrong two. Here is the honest version, using the numbers as they actually stand in August 2026.

The comparison almost everyone gets wrong

The instinct is to put rent next to the mortgage payment. That is not a like-for-like comparison, because a repayment mortgage does two different jobs at once. Part of it is interest, which is a cost, money gone to the lender exactly as rent is money gone to a landlord. The rest is capital repayment, which is not a cost at all, it is forced saving that turns into equity you own.

So the fair comparison is rent against the true cost of owning: mortgage interest, plus maintenance, plus insurance, plus service charges, plus the transaction costs of getting in and out, spread over the years you actually stay. Get that right and the picture changes considerably.

The numbers as they stand in August 2026

Average UK monthly private rent reached £1,388 in the twelve months to June 2026, up 3.3% on the year, according to the Office for National Statistics. The average UK house price is £277,542 on Nationwide's July index, growing at a much slower 1.8% a year. The Bank of England held Bank Rate at 3.75% on 30 July, and the best five-year fixed mortgage rates sit around 4.5% at 60% loan to value, with typical borrowers at higher loan to value paying meaningfully more. That hold was not unanimous: three of the nine committee members voted to raise the rate to 4%, so the risk to mortgage pricing currently points upwards rather than down. The next decision is on 17 September, and every rate quoted here is as at early August.

Take an average home at £277,542 with a 10% deposit. That is £27,754 down and a £249,788 mortgage. At 5% over thirty years the monthly payment is about £1,341, of which roughly £1,041 is interest in the first year and £300 is capital going into your own pocket. Add maintenance at the usual rule of thumb of 1% of the property value a year, £231 a month, and buildings insurance at around £30.

Monthly, first year	Rent	Buy
Rent or mortgage interest	£1,388	£1,041
Capital repayment (saving, not cost)	£0	£300
Maintenance and repairs	£0	£231
Buildings insurance	£0	£30
True monthly cost	£1,388	£1,302

Roughly a wash. On the average UK home at today's rates, owning costs about £86 a month less than renting once you strip out the part of the payment that is really saving. That is the finding most people find surprising in both directions: buying is not the runaway win the "dead money" line implies, and renting is not the catastrophe either.

"Owning the average British home costs about £86 a month less than renting it. Everything else in this decision is about the costs you pay once, and how long you stay to spread them."

The monthly comparison is close, so the answer is driven by the one-off costs. Buying that £277,542 home means £3,877 of stamp duty for a mover, a tax charged in England and Northern Ireland only (Scotland pays Land and Buildings Transaction Tax and Wales pays Land Transaction Tax, both on different thresholds, and Scotland diverges on income tax too), though a first-time buyer pays nothing at all below £300,000, plus roughly £3,000 for legal fees, survey and mortgage arrangement. Selling later costs another £4,000 to £5,000 in estate agent commission and legal work. Call the round trip somewhere near £11,000 of money you never see again, and note that the deposit itself is not in that figure because it stays yours as equity. Be careful with that £11,000. Only the stamp duty is fixed by statute; the legal, survey and agent costs are market estimates that vary by property, region and how hard you negotiate, so the true round trip could reasonably fall anywhere between £9,000 and £13,000. It is the figure the break-even below rests on, so treat that as an order of magnitude rather than a precise number of months.

Recovering £11,000 at £86 a month takes over a decade. Which is why, on running costs alone, buying only wins if you stay put for a long time. The conventional five-year rule of thumb is not arbitrary, it is roughly where the sums start to work once you allow for some house price growth.

Leverage is the real argument, in both directions

What genuinely tips the maths is that a mortgage lets you own an asset worth ten times your deposit. At 1.8% annual growth, the average home gains about £5,000 in a year. Against a £27,754 deposit that is an 18% return on the money you actually staked, which no ordinary investment matches, and it covers the round-trip transaction costs within about two to three years.

But leverage is symmetrical and the honest version has to say so. A 5% fall in prices, entirely ordinary by historical standards, is £13,877, which is half your deposit gone. Sell in that window and you also pay the exit costs on top. The same mechanism that makes buying powerful over a decade makes it genuinely dangerous over two or three years.

There is one more line to include: the deposit has an opportunity cost. Left invested at 5% a year, £27,754 would grow to about £35,400 over five years. That growth is what you give up, and it is the strongest financial argument for renting while you build up other assets, particularly if you might move city or job.

So which is it, and what to do this week

Buying is likely to be the better financial decision if you are confident of staying five years or more, you have a deposit plus a separate emergency fund, and the monthly payment leaves room to keep investing. Renting is likely to be better if there is any real chance you move within three years, if buying would consume every pound of savings you have, or if the only way to afford the mortgage is to stop contributing to a pension. Stopping an employer pension match to fund a mortgage is one of the few housing decisions that is unambiguously wrong.

And if you are saving a deposit right now, check whether the Lifetime ISA applies to you, because a 25% government bonus of up to £1,000 a year is a larger effect than any of the rate differences discussed above. Keep the deposit itself in cash rather than investments once you are within a few years of buying, and clear expensive debt first, since it will also determine what a lender offers you.

Work out your own version of the table. Take the rent you pay now, then take the price of a home you would realistically buy, multiply the mortgage balance by your likely rate and divide by twelve for the interest, add 1% of the value annually for maintenance, and compare. Then ask the only question that really decides it: how confident are you that you will still be there in five years?

Compound provides general information, not financial advice. Figures are illustrative and based on average UK data at August 2026; your own numbers will differ.