Key Takeaway

Rental yield measures the annual rental income as a percentage of the property purchase price (gross yield) or after costs (net yield). A good gross rental yield in the UK typically sits between 5% and 8%, though higher yields often come with higher tenant turnover or maintenance costs. Net yield, which factors in mortgage interest, maintenance, insurance, and void periods, gives a more accurate picture of profitability and is the figure serious landlords track when comparing investment properties.

What Is Rental Yield?

Rental yield is the return you earn from rental income relative to the cost of the property. According to foundational investment principles covered in educational resources such as Principles of Finance, return on investment is a core metric for evaluating any asset, and property is no exception. For buy-to-let landlords in the UK, rental yield helps compare opportunities, assess whether a property will cover its mortgage and running costs, and decide if the investment is worth the capital and effort.

There are two types:

  • Gross rental yield: annual rent divided by the property purchase price (or current market value), expressed as a percentage. This ignores all costs and gives a quick snapshot.
  • Net rental yield: annual rent minus all running costs (mortgage interest, maintenance, insurance, letting agent fees, void periods, ground rent, service charges), divided by the total amount invested (purchase price plus stamp duty, legal fees, and refurbishment). This is the real profitability figure.

Most landlords start with gross yield to filter opportunities quickly, then calculate net yield on properties that pass the first screen.

How to Calculate Rental Yield

Gross Rental Yield

The formula is straightforward:

Gross Rental Yield (%) = (Annual Rent / Property Purchase Price) x 100

Example: you buy a property for £200,000 and rent it for £1,000 per month (£12,000 per year). Gross yield = (12,000 / 200,000) x 100 = 6%.

Net Rental Yield

Net yield accounts for the real costs of ownership:

Net Rental Yield (%) = ((Annual Rent - Annual Costs) / Total Investment) x 100

Using the same property, assume:

  • Annual rent: £12,000
  • Mortgage interest (interest-only mortgage at 5% on £150,000 loan): £7,500
  • Letting agent fees (10% of rent): £1,200
  • Insurance, maintenance, safety certificates: £1,500
  • Void periods (one month unfilled): £1,000
  • Total costs: £11,200
  • Total investment: £200,000 purchase + £7,000 stamp duty (higher rate for additional property) + £3,000 legal and refurbishment = £210,000

Net yield = ((12,000 - 11,200) / 210,000) x 100 = 0.38%.

Read also: Buy-to-Let Mortgages in the UK: What Landlords Need to Know

In this example, net yield is nearly zero. The property generates income but little profit after costs. Many landlords accept low net yields in high-capital-growth areas (London, the South East) and target higher net yields in regional cities where prices are lower but rents are strong relative to purchase cost.

What Makes a Good Rental Yield in the UK?

According to MoneyHelper guidance on property investment, target yields vary by region, property type, and landlord strategy (MoneyHelper, 2026).

  • Gross yield of 5% to 8% is typically considered good in the UK. Yields above 8% often signal higher-risk areas (greater tenant turnover, higher maintenance, lower capital growth).
  • Net yield of 2% to 4% is realistic for many landlords after all costs. Anything above 4% is strong, especially if the property also offers capital appreciation.
  • London and the South East: gross yields often sit below 5% (high purchase prices, moderate rents), but landlords invest for long-term capital growth.
  • Regional cities (Manchester, Leeds, Liverpool, Newcastle, Nottingham): gross yields of 6% to 8% are common, with stronger cash flow but slower capital growth.

The best investment depends on your goals. If you need immediate cash flow to cover mortgages and living costs, prioritise net yield. If you are building long-term wealth and can afford lower income now, capital growth may matter more.

Costs That Affect Your Net Yield

Buy-to-let investors face several costs that reduce headline rental income:

  • Stamp duty land tax (SDLT): buy-to-let and second-home buyers pay a 3 percentage point surcharge on top of standard SDLT rates in England and Northern Ireland (devolved equivalents apply in Scotland and Wales). This adds thousands to upfront costs (GOV.UK, 2026).
  • Mortgage interest: most buy-to-let mortgages are interest-only. Interest is no longer fully deductible from rental income for tax; instead, landlords receive a 20% tax credit on mortgage interest, which raises effective costs for higher-rate taxpayers.
  • Letting agent fees: typically 8% to 12% of monthly rent if you use a managed service.
  • Maintenance and repairs: budget 10% to 15% of annual rent for ongoing upkeep.
  • Insurance: landlord insurance, buildings cover, and optionally contents and rent-guarantee insurance.
  • Void periods: expect one to two months per year unfilled in most markets.
  • Safety compliance: gas safety certificates, electrical inspections, Energy Performance Certificates (EPCs), and smoke and carbon monoxide alarms.

Factor all of these into your net yield calculation before committing.

How the Calculator Helps

Manually tracking these variables across multiple properties is time-consuming and error-prone. The rental yield calculator lets you input purchase price, monthly rent, mortgage details, and all running costs, then instantly see both gross and net yield. You can compare properties side by side, model different mortgage rates, and understand how sensitive your return is to rent increases or cost changes. It helps landlords make faster, more confident decisions when evaluating opportunities.

Important Disclaimers

This article provides general educational information about buy-to-let investment and rental yield in the UK. It is not regulated mortgage advice, financial advice, or tax advice, and it is not tailored to your personal circumstances. Refisage is not authorised by the Financial Conduct Authority (FCA).

Your home may be repossessed if you do not keep up repayments on your mortgage. Buy-to-let mortgages are not regulated by the FCA and do not carry the same protections as residential mortgages. Rental income is not guaranteed, and you remain liable for mortgage payments during void periods. Property values and rents can fall as well as rise.

Stamp duty rates, mortgage lending criteria, tax treatment, and regulatory requirements change frequently. Verify current rules and rates with an FCA-authorised mortgage adviser, a qualified tax professional, and your solicitor before purchasing a buy-to-let property. Rental yield calculations are estimates; actual returns depend on market conditions, tenant quality, and unforeseen costs.