Rental Yield Explained — How to Calculate Gross and Net Yield on a Buy-to-Let Property

What is Rental Yield?

Rental yield is the annual rental income expressed as a percentage of the property’s value. It is the primary measure of the return generated by a buy-to-let property before considering capital growth or mortgage costs.

There are two versions: gross yield and net yield.

Gross Rental Yield

Gross yield is calculated before deducting any costs:

Formula:

> Gross yield = (Annual rent ÷ Property value) × 100

Example:

• Monthly rent: £1,200
• Annual rent: £14,400
• Purchase price: £240,000
• Gross yield: (£14,400 ÷ £240,000) × 100 = 6.0%

Gross yield is useful for quick comparisons between properties or areas. It is the figure most often quoted in property investment discussions and listings.

Net Rental Yield

Net yield deducts all costs from the annual rent before calculating the return:

Formula:

> Net yield = ((Annual rent – Annual costs) ÷ Property value) × 100

Costs to deduct:

• Letting agent fees (typically 8–15% of rent)
• Maintenance and repairs (budget 1% of property value per year)
• Landlord insurance
• Gas safety certificate, EICR, and other compliance costs
• Void periods (typically budget 4–6 weeks per year)
• Mortgage arrangement fees (amortised over the mortgage term)
• Accountancy fees (if applicable)

Note: mortgage interest payments are not deducted from net yield calculations; they are a financing cost assessed separately.

Example:

• Annual rent: £14,400
• Agent fees (10%): £1,440
• Maintenance (1% of £240,000): £2,400
• Insurance: £400
• Void allowance (4 weeks): £1,108
• Total costs: £5,348
• Net income: £9,052
• Net yield: (£9,052 ÷ £240,000) × 100 = 3.8%

The gap between gross (6.0%) and net (3.8%) is significant. Many investors focus on gross yield and underestimate running costs.

What is a Good Rental Yield in the UK?

There is no single benchmark, as yield varies enormously by location:

• London: 3–5% gross in many areas, with higher capital growth expectations
• Northern cities (Manchester, Liverpool, Leeds): 6–8% gross is achievable
• Scotland and the North East: Some areas exceed 8–10% gross

Higher yield areas often have lower capital growth prospects, while lower yield areas (particularly London) have historically delivered stronger capital appreciation. The right balance depends on your investment objectives.

A net yield of 4–5% after all costs (but before mortgage and tax) is generally considered acceptable for a leveraged buy-to-let. Net yields below 3% after costs rarely stack up on a leveraged basis once Section 24 tax effects and maintenance costs are fully accounted for.

Yield vs Capital Growth

Yield and capital growth tend to be inversely correlated in UK property. Low-yield markets (London, Cambridge, Bristol) have historically delivered strong capital gains. High-yield markets deliver better current income but lower long-term appreciation.

Neither strategy is universally superior. The choice depends on your holding period, financing structure, income needs, and tax position.

Using Sold Price Data to Assess Yield

Property Passport UK displays HM Land Registry sold price data for all registered properties in England and Wales. Comparing the most recent sold price with current rental asking prices in the same street or postcode is a quick way to estimate the gross yield of potential investments before committing to a viewing.