Decision guide
Rent or buy: how to actually run the numbers
National “renting beats buying” headlines are useless for an individual decision — the answer flips between postcodes, deposits and time horizons. What you can do is run an honest comparison for one specific area, using registered sold prices (data through August 2026) on the buy side and ONS local rent statistics on the rent side.
The honest cost of owning
The mortgage payment is not the cost of owning. A fair buy-side total for one year looks like this:
- Mortgage interest — the interest portion only. The capital repayment portion is forced saving, not a cost.
- One-off costs spread over your stay — stamp duty, legal fees, survey, mortgage fees on the way in; agent and legal fees on the way out. Divide by the years you realistically expect to stay.
- Maintenance and insurance — a widely used planning figure is around 1% of the property value per year, more for older homes; plus buildings insurance, and service charge and ground rent for leasehold flats.
- Deposit opportunity cost — what your deposit could earn elsewhere. Easy to overlook, real nonetheless.
Against that sits the rent you would otherwise pay, rising with annual increases — and the equity you build plus any price growth, which is genuinely unknowable in advance. What sold-price history can tell you is how the area has behaved across past cycles: check the long-run price trend chart on any town or postcode page before assuming growth.
A worked structure (fill in your area)
| Line | Where to get it |
|---|---|
| Local buy price | Median sold price for the postcode or town on this site — not asking prices |
| Stamp duty | Stamp duty calculator with your buyer status |
| Monthly mortgage split | Mortgage calculator — note the interest vs capital split, not just the payment |
| Local rent | ONS private rent statistics for the local authority, cross-checked with current listings |
| Years you will stay | Your honest answer — this drives how far the one-off costs spread |
Signals that tilt the answer
- Towards buying: staying five-plus years, a stable income, a deposit that unlocks a mainstream mortgage rate, and a local market where monthly ownership costs are near or below rents.
- Towards renting: a likely move within a few years, career or family uncertainty, a market where prices are far above what local sold-price history supports, or where renting is much cheaper monthly than owning the same home.
- Towards waiting: a deposit just below a loan-to-value band boundary — a few more months of saving can noticeably cut the mortgage rate.
Important limitation
This framework helps you organise a personal comparison; it does not predict prices or rates and is not financial advice. Mortgage decisions should involve a regulated adviser.
Anchor the buy side with real data
Frequently asked questions
Is it cheaper to rent or buy in the UK?
It depends on the area, your deposit, mortgage rates and how long you stay. Buying front-loads large one-off costs (deposit, stamp duty, legal and survey fees) that only amortise if you stay several years; renting keeps flexibility but builds no equity. Run the numbers for the specific postcode rather than trusting national headlines.
How many years do I need to stay for buying to make sense?
A common rule of thumb is that the one-off costs of buying and later selling need several years to spread out — often around five. The exact break-even depends on your rent, mortgage rate, fees and what local prices do, which nobody can promise in advance.
What costs do renters forget when comparing?
On the buying side: stamp duty, legal fees, survey, mortgage fees, maintenance (often estimated around 1% of the property value per year), buildings insurance and, for flats, service charges and ground rent. On the renting side: annual rent increases and moving costs between tenancies.
Where do I find reliable local rent figures?
The Office for National Statistics publishes local-area private rent statistics, and listing sites show current asking rents. Remember asking rents are like asking prices — the advertised number, not necessarily the agreed one.
How do I estimate the buy side accurately?
Use registered sold prices for the exact postcode or street — not asking prices — to anchor what homes actually transact for, then add stamp duty from a calculator and realistic fees. This site provides the sold-price side for every postcode in England and Wales.