UK Buy vs Rent Calculator

About UK Buy vs Rent Calculator

How the Comparison Works

The model tracks two people in parallel over your chosen time period and compares final net worth, not just cash paid out.

The buyer pays: deposit, stamp duty (SDLT), monthly mortgage payments on the remaining balance, and annual maintenance as a percentage of current property value. They build equity through mortgage principal repayment and property appreciation.

The renter pays monthly rent (increasing each year by the annual rent inflation you set) and invests the money they would otherwise have tied up. Their starting investment pot equals the buyer's deposit plus stamp duty, and any month the buyer's mortgage plus maintenance exceeds the rent, that difference is added to the renter's pot.

Worked example: £300,000 property, 10% deposit (£30,000), 4.5% mortgage over 25 years, 3% house price growth, £1,200 starting rent rising 3% a year, 6% investment return, 15-year horizon. Buyer stamp duty = 2% x £175,000 = £3,500. Monthly mortgage on £270,000 at 4.5%/25y is about £1,501. After 15 years the property is worth roughly £467,000 and about £154,000 of the mortgage has been repaid, leaving buyer equity near £351,000. The renter's pot (seeded with £33,500) grows to about £120,000 while paying roughly £268,000 in rent. Buying wins in this scenario, but lower growth or a shorter horizon flips the verdict.

What Tips the Balance

Current UK Market Conditions (April 2026)

The 2026 UK housing market is recovering after a sluggish 2024-2025. Mortgage rates jumped sharply in early April: Moneyfacts reports the average 2-year fixed at 5.84% and the average 5-year fixed at 5.75% as of 1 April 2026, up from 4.84% and 4.95% a month earlier. Rate rises narrow the gap between renting and buying because each extra percentage point on a £270,000 mortgage adds roughly £160 to the monthly payment.

House price growth has re-accelerated. ONS data shows UK average prices rose 1.3% in the 12 months to January 2026 to £268,000, while Nationwide's March 2026 index reports annual growth of 2.2% and an average price of £277,186. Rent inflation remains elevated: ONS figures for the 12 months to February 2026 show average rents up 3.6% in England (£1,430), 5.5% in Wales (£828), 2.4% in Scotland (£1,022), and 5.2% in Northern Ireland (£875 to December 2025). When rent rises faster than property values, the calculator tends to tilt further toward buying.

The Hidden Costs of Buying

Buying costs extend well beyond the mortgage. A fair comparison must include every one-off and recurring charge, because these are exactly what the renter avoids.

• Stamp Duty Land Tax (SDLT): Standard English/Northern Ireland rates for 2026/27 are 0% to £125,000, 2% to £250,000, 5% to £925,000, 10% to £1.5m, 12% above. A £350,000 standard buyer pays £7,500. First-time buyers pay 0% up to £300,000 and 5% to £500,000, with relief lost entirely above £500,000. Use the stamp duty calculator for exact figures on any price.
• Solicitor or conveyancing: £1,000-2,500 including searches and Land Registry fees.
• Survey: £300-500 for a basic Level 1, £500-1,000 for a HomeBuyer Report (Level 2), £800-1,500+ for a full Building Survey on older or larger properties.
• Mortgage arrangement fee: £0 on some products, often £995-2,000 on headline-rate deals.
• Maintenance: Budget 1-2% of property value a year. A £300,000 home costs roughly £3,000-6,000 a year in repairs, replacement appliances, exterior work and service charges.
• Buildings insurance: £200-500 a year (required by lenders).
• Opportunity cost: The deposit could sit in the stock market instead. £35,000 at 7% annual returns compounds to roughly £69,000 in 10 years and £138,000 in 20.
• Selling costs: Estate agent fees (typically 1-1.5% plus VAT), solicitor, EPC, removal. On a £350,000 sale, budget roughly £5,000-7,000.

Total transaction costs across a full buy-then-sell cycle can reach £20,000-30,000. This is why the calculator typically shows renting ahead over three-to-five-year horizons - there simply isn't enough time for equity gains to recoup the friction.

What Is the Rent vs Buy Breakeven?

A common heuristic is the price-to-rent ratio (property price divided by annual rent). Ratios below 15 favour buying, 15-20 is neutral, and above 20 favours renting. This mirrors the US-origin "5% rule" from NYU Stern's Aswath Damodaran and others: if annual rent is above 5% of price, buying usually wins; below 3%, renting usually does.

Example: A flat costs £300,000 to buy or £1,200/month (£14,400/year) to rent. Rent as a percentage of price is 14,400 / 300,000 = 4.8%. Price-to-rent ratio is 300,000 / 14,400 = 20.8. That is on the borderline, so the time horizon and your mortgage rate become the deciding factors.

Central London often shows price-to-rent ratios of 30+ (yields of 2-3%), which is why outright investor buyers struggle to cover mortgage costs from rent alone. Northern cities like Hull, Sunderland and Burnley typically sit at 12-15 (yields of 6-8%), making buying financially clearer even on short horizons.

How Mortgage Rate Changes Shift the Answer

A single percentage point on the mortgage rate can change the verdict entirely. On a £270,000 mortgage over 25 years: at 3% the monthly payment is about £1,280; at 4.5% it is about £1,501; at 6% it is about £1,740. Over 15 years that's a difference of nearly £83,000 in total payments between the 3% and 6% scenarios, with interest making up most of the extra cost. When current market rates are near a cyclical high (as Moneyfacts flagged in April 2026), renting and waiting for rates to fall is a more defensible choice than when rates are historically low.

Non-Financial Factors

Money is not the whole picture. These considerations don't appear in the calculator but often drive the real decision.

• Stability: Owners cannot be evicted by a landlord wanting to sell or move back in. Under the Renters' Rights Act 2024 no-fault Section 21 evictions were abolished, but periodic tenancies can still end on specific statutory grounds. Families with school-age children often value ownership's permanence.
• Customisation: Owners can renovate, extend, and decorate. Renters are limited by the tenancy agreement and need landlord consent for almost any change.
• Flexibility: Renters can usually relocate within 1-2 months. Selling a house takes 3-6 months minimum from listing to completion.
• Maintenance stress: Homeownership brings boiler breakdowns, roof leaks, and emergency plumbing bills. Renters pass these to the landlord.
• Forced savings: Mortgage payments build equity automatically. Renters need discipline to invest the difference every month, which the calculator assumes but real life often doesn't deliver.

Common Mistakes in DIY Comparisons

• Ignoring opportunity cost: Comparing rent to mortgage payment alone misses the £30,000+ deposit that could have been invested.
• Forgetting maintenance: First-time buyers routinely underestimate ongoing costs. 1% a year is a floor, not a ceiling.
• Assuming house prices only go up: UK nominal prices fell 15-20% in 1989-1995 and 15%+ in 2008-2009. A 3% annual growth assumption is average, not guaranteed.
• Missing selling costs: Estate agent fees plus solicitor plus EPC typically eat 2-3% of sale price.
• Treating rent as static: UK rents rose 9%+ in 2023 and 5%+ in 2024. Always apply an annual rent inflation figure.

To check how much you can borrow, use the mortgage affordability calculator. For monthly payment estimates on a specific property, try the mortgage calculator. For projecting how the renter's investment pot might grow, pair this tool with the investment return calculator.

All calculations run in your browser. No financial data is sent anywhere.

Sources

• GOV.UK - Stamp Duty Land Tax residential property rates
• ONS - Private rent and house prices, UK: March 2026
• ONS - Private rent and house prices, UK: February 2026
• Moneyfacts - UK mortgage rate data (April 2026)
• Nationwide House Price Index
• MoneyHelper - Stamp Duty Calculator and guide