Rental Yield Explained: How to Calculate and What's a Good Return

Rental yield is the single most important metric for evaluating a buy-to-let investment. It tells you how much income a property generates relative to its value, expressed as a percentage. A property worth £200,000 that generates £12,000 per year in rent has a 6% gross rental yield. But gross yield only tells half the story. This guide explains both gross and net yield, what counts as a good return, and the factors that can make or break your investment.

What's the Difference Between Gross and Net Rental Yield?

Gross rental yield is the simplest calculation: annual rent divided by property value, multiplied by 100. If a property costs £180,000 and rents for £850 per month (£10,200 per year), the gross yield is 5.67%. This is the number most property listings and comparison sites use because it is easy to calculate and compare.

Gross Yield = (Annual Rent / Property Value) x 100
Net Yield = ((Annual Rent minus Annual Costs) / Property Value) x 100

Net rental yield subtracts all landlord expenses before dividing by the property value. These expenses include mortgage interest, insurance, maintenance, letting agent fees, void periods, and service charges. Net yield is typically 2% to 3% lower than gross yield but gives a far more accurate picture of your actual return.

What's a Good Rental Yield?

In the current UK market, a gross rental yield of 5% to 8% is generally considered good. Below 4% is low and may not cover your costs, especially with current mortgage rates. Above 8% is achievable in some areas but often comes with trade-offs like higher tenant turnover, lower property condition, or weaker capital growth.

The right target depends on your strategy. Income-focused investors prioritise high yield (6% to 8%+) and are willing to accept slower property price growth. Capital growth investors accept lower yields (4% to 5%) in areas where property values are rising faster, banking on long-term appreciation.

What Factors Affect Rental Yield?

Location. Yields vary dramatically across the UK. Northern cities typically offer higher yields (6% to 8%) while London and the South East offer lower yields (3% to 5%). This is because property prices in London are disproportionately high relative to rents.

Property type. Houses in multiple occupation (HMOs) can generate yields of 8% to 12% because you rent by the room rather than the whole property. However, HMOs require more management, have higher maintenance costs, and need an HMO licence. Standard single-let flats and houses are simpler to manage but yield less.

Void periods. Every month your property sits empty costs you a full month's rent. Budget for 4 to 8 weeks of void per year. Properties near universities, hospitals, or major employers tend to have shorter void periods due to consistent demand.

Maintenance costs. Older properties may offer attractive purchase prices but require more maintenance. Budget 10% to 15% of annual rent for maintenance on older properties and 5% to 10% on newer builds. Use our Home Insurance Calculator to estimate your insurance costs.

What Are the Average Rental Yields Across the UK?

Understanding regional differences helps you target the right areas. The North East and North West consistently offer the highest yields (6% to 8%), while London offers the lowest (3% to 4.5%). The Midlands sit in the middle (5% to 6.5%) and offer a reasonable balance of yield and capital growth. Always verify yields with local rental data rather than relying on national averages.

When evaluating a buy-to-let purchase, also consider the stamp duty implications (remember the 3% additional property surcharge) and use our Mortgage Calculator to model your monthly repayments against rental income.

What Are Common Mistakes When Calculating Rental Yield?

Using gross yield for investment decisions. Gross yield looks attractive but ignores the costs that eat into your return. Always calculate net yield before committing to a purchase.

Ignoring void periods. Assuming 100% occupancy inflates your yield calculation. A realistic occupancy rate is 90% to 95% for well-located properties.

Forgetting capital expenditure. Boilers, roofs, kitchens, and bathrooms all need replacing eventually. Set aside a sinking fund of 1% to 2% of the property value per year for major works.