Rent vs Buy in the UK in 2026: Why The Maths Has Changed

title: "Rent vs Buy in the UK in 2026: Why The Maths Has Changed" slug: "rent-vs-buy-2026-uk" publishedAt: "2026-05-09" updatedAt: "2026-05-09" excerpt: "Mortgage rates above 5%, the SDLT nil-rate band reset, and double-digit rent inflation have rewritten the rent-vs-buy decision. Here's what the actual numbers say for a 5-year horizon in 2026." readMinutes: 9 calculator: "rent-vs-buy" tags: ["uk", "property", "mortgage", "rent-vs-buy", "sdlt"]

For most of the 2010s, the answer to "should I buy?" in the UK was an easy yes: mortgages were under 2%, house prices kept climbing, and the rent on an equivalent property easily exceeded a mortgage payment. The maths basically did itself.

That world is gone. In 2026, the rent-vs-buy calculation has three new variables that didn't exist in 2019:

• Mortgage rates around 5.5-5.8% for typical 5-year fixed products
• SDLT nil-rate band reset from £250k back to £125k from April 2025
• Rents up ~25% since 2021 in most major cities

Those three pull in different directions. Higher rates make buying more expensive; higher rents make renting more expensive; the SDLT change makes buying more expensive upfront. Whether buying still wins depends entirely on how long you'll stay, where you live, and what your deposit could earn elsewhere.

This article walks through the mental model and a realistic 2026 worked example.

The honest framing: opportunity cost on the deposit

The most common rent-vs-buy mistake is to compare rent per month with mortgage payment per month. That ignores the £40-80k sitting as your deposit, which could otherwise be invested.

A proper comparison has three buckets:

When you buy:

• Upfront: deposit + SDLT + legal fees + survey + moving costs
• Ongoing: mortgage interest (the rent you pay the bank) + property tax + insurance + maintenance (~1% of home value/year) + service charge/ground rent if leasehold
• Recovery: equity built (the principal portion of payments) + house price appreciation

When you rent:

• Upfront: deposit (refundable) + first month's rent
• Ongoing: monthly rent + renter's insurance + utilities (often higher fraction than owners due to less control)
• Recovery: nothing on the house side, but the deposit invested at 5-7% is your store of wealth

The "break-even year" is the point at which your buyer net wealth (home equity + house appreciation − all costs paid) overtakes your renter net wealth (deposit + monthly savings invested at market return − rent paid).

What's new in 2026

Mortgage rates: ~5.7% for a 5-year fix

The Bank of England base rate sits at 4.25% at time of writing, and mainstream lenders are pricing 5-year fixes around 5.4-5.8% for 75% LTV. That's roughly 3 percentage points above the 2019 norm, which transforms the buy-side math: on a £340,000 mortgage, the interest portion of year-1 payments is around £19,200 vs ~£8,200 at 2.4%.

SDLT reset

From 1 April 2025, the nil-rate band for residential SDLT dropped from £250,000 back to £125,000 for non-first-time buyers. First-time buyer relief still applies up to £300,000. The practical impact: anyone buying a £400k home as a non-FTB now pays £10,000 SDLT instead of £7,500 — and FTB buying above £300k starts paying again where they wouldn't have under the old thresholds.

See the gov.uk SDLT calculator for your specific case.

Rents up ~25% since 2021

ONS data shows median private rents in the UK up roughly 25% from January 2021 to early 2025 — sharper in London and the South East, milder in the North East. Rent inflation has cooled since mid-2024 but is still running 4-6% YoY.

Worked example: £400k flat, 5-year horizon

Let's price out a real London Zone 4 / Manchester city-centre / Bristol post-2000 flat at £400,000, with a 15% deposit (£60,000), £1,750/month rent for the equivalent property.

Upfront buying costs: | Item | £ | | --- | --- | | Deposit | 60,000 | | SDLT (non-FTB) | 10,000 | | Legal + survey + searches | 2,000 | | Total upfront | 72,000 |

Mortgage: £340,000 over 25 years at 5.7% = £2,128/month. Year 1 interest ≈ £19,200; year 1 principal ≈ £6,300.

Ongoing ownership costs (year 1): | Item | £/yr | | --- | --- | | Mortgage interest | 19,200 | | Service charge + ground rent | 2,400 | | Maintenance reserve (1% of value) | 4,000 | | Buildings insurance | 350 | | Council tax (assumed already incurred when renting) | — | | Total non-recoverable | 25,950 |

That's £2,162/month of "money that disappears" when you buy — eerily close to the £2,128 monthly mortgage payment.

Renter side:

• £1,750/month rent × 12 = £21,000/year (rising 5%/year)
• £60,000 deposit invested at 5% real return
• Each year, you add the difference between buyer cash-out (£25,950 + £6,300 principal = £32,250) and rent (£21,000) → £11,250 saved, also invested at 5%

At year 5, with 3%/year house price appreciation:

| | Buy net worth | Rent net worth | | --- | --- | --- | | Home equity (deposit + principal) | £100,800 | — | | House appreciation | £63,700 | — | | Less remaining upfront | −£12,000 | — | | Invested portfolio | — | £170,400 | | Net worth | £152,500 | £170,400 |

Renting wins by ~£18,000 at year 5. The break-even is around year 7.

When buying still wins easily

Buying is still the better 5-year outcome in three situations:

1. You're a first-time buyer paying no SDLT below £300k. Removing £5-10k of upfront cost shifts the break-even back to year 4-5.

2. You stay long enough. Past 10 years, buyer net wealth almost always wins because forced principal repayment is a form of saving most renters don't manage to match.

3. Rent inflation outpaces house prices. In some Northern cities and Birmingham post-pandemic, rents have grown faster than capital values — so the renter's "savings" shrink each year while the buyer's mortgage stays fixed.

When renting actually wins (and people misjudge it)

• Short horizons (3 years or less). Transaction costs alone (~£14k buying + ~£8k selling) make this a near-certain loss.
• High service charges in new-build flats. A £400/month service charge wipes out years of principal accumulation.
• You'd otherwise leverage the £60k into a strong index portfolio. A renter who actually invests the deposit at 5%+ real return is the toughest case for buying to beat.

A simple rule of thumb for 2026

For a non-FTB buyer:

• < 5 years: rent.
• 5-7 years: depends on FTB status, deposit alternatives, and city.
• > 7 years: buying almost always wins on net worth, particularly if you fix the mortgage.

For a FTB under £300k, knock about 18 months off each band.

Try the calculator

The RédeWise Rent vs Buy calculator works through all of this — it lets you change deposit, mortgage rate, rent, appreciation, investment return, and time horizon, then shows the break-even year on a chart. Defaults are tuned to 2025 UK numbers.

Sources

• Bank of England — Mortgage rates
• gov.uk — Stamp Duty Land Tax: residential rates from April 2025
• ONS — Private rent and house prices, UK
• Nationwide UK House Price Index

Not financial advice. Property is a complex decision involving things this article ignores (life stage, partner, area, school catchment). Use the numbers as one input, not the answer.