Should you rent or buy?

Rent vs Buy in the UK: A Complete Guide

The decision to rent or buy a home is one of the biggest financial choices you will make. In the UK, homeownership has long been seen as the default aspiration, but rising house prices, higher mortgage rates, and the growing accessibility of investment platforms mean that renting and investing can be a genuinely competitive alternative.

How SDLT Affects Your Decision

Stamp Duty Land Tax (SDLT) is one of the largest upfront costs of buying in England and Northern Ireland. For the 2025/26 tax year, the nil-rate band is £250,000 for standard purchasers and £425,000 for first-time buyers (on properties up to £625,000). This means a first-time buyer purchasing at £350,000 pays zero SDLT, while a non-first-time buyer pays £5,000. That is money that could otherwise be invested.

The Power of House Price Growth

When you buy with a mortgage, you are using leverage — a 10% deposit gives you exposure to 100% of the property value. If the house grows by 3% per year, your equity grows much faster in percentage terms. This leverage effect is one of the strongest arguments for buying, but it works both ways: if prices fall, your losses are amplified too.

Renting and Investing: The Alternative Path

If you rent, you avoid the large upfront costs (deposit, SDLT, legal fees) and the ongoing costs of ownership (maintenance, service charges, ground rent). The money you would have spent on these can be invested — typically in a stocks and shares ISA for tax-free growth. Historically, UK equities have returned around 5-7% per year after inflation, though returns are never guaranteed.

Key Factors That Swing the Decision

The two biggest variables are house price growth and investment returns. A 1% change in either can flip the outcome. Other important factors include how long you plan to stay (buying tends to win over longer periods due to amortisation), your mortgage rate, rent inflation in your area, and whether you are a leaseholder facing service charge increases. London buyers face a higher cost of entry but also stronger historical price growth, while Northern cities offer higher rental yields relative to purchase prices.

What This Calculator Does Not Include

This model is illustrative. It does not account for inflation adjustments (all figures are nominal), tax on investment gains beyond ISA limits, the emotional value of homeownership, mortgage product fees and remortgaging costs, buildings insurance, council tax differences between renters and owners, or the risk of rental eviction. Always seek independent financial advice before making major property decisions.

Try Adjusting

House price growth and investment return are the biggest swing factors. A 1% change in either flips the outcome in many scenarios. Try setting house price growth to 0% to model a flat market, or push investment returns to 8% to see what a strong equity portfolio could deliver. The interplay between these two assumptions is where the real insight lies — small shifts can turn a clear "buy" into a comfortable "rent".

Leasehold Owners

Don't forget service charge inflation — many leaseholds see 5-8% annual increases that can dramatically erode the financial advantage of buying. Ground rent escalation clauses can also compound significantly over time, particularly in older leases with doubling clauses. If you are buying a leasehold flat, open the "Advanced — Ownership costs" section in the calculator and set realistic service charge and ground rent inflation rates. The impact over a 25-year term can be tens of thousands of pounds.

How We Calculate

The buying scenario models full mortgage amortisation (principal + interest), stamp duty (SDLT), conveyancing fees, annual maintenance, service charge, and ground rent. On sale, estate agent fees are deducted at 2.5%. The renting scenario invests your deposit at 6% pa and adds any monthly savings versus ownership costs to the pot. Rent grows at 3.5% pa. All figures are nominal — no inflation adjustment. This is an illustrative model, not financial advice.

Step-by-step calculation