Rental yield is the single most important number in buy-to-let property investment.
It tells you how much annual return you can expect from a rental property as a percentage of its purchase price. It lets you compare completely different properties — different sizes, different locations, different values — on a single, consistent basis. And it tells you, before you commit a penny, whether a property is likely to generate the income you need.
Yet a surprising number of landlords and investors either do not calculate it properly, or use only the gross figure — which flatters the return by ignoring costs that can reduce a 7% headline yield to 4% in reality.
This guide explains how to calculate both gross and net rental yield from scratch, works through real examples, covers what counts as a good yield across different UK markets, and explains the other factors that should sit alongside yield when assessing any property investment.
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What Is Rental Yield?
Rental yield is the annual return on a property expressed as a percentage of its purchase price or current market value.
It answers one simple question: for every £100 you invest in this property, how many pounds does it generate in rent each year?
A 6% yield means the property generates rent equivalent to 6% of its value annually. A 4% yield means it generates 4%. The higher the yield, the stronger the income return relative to the investment.
Rental yield does not include capital growth — the increase in the property’s value over time. Both matter to a buy-to-let investor, but they are separate calculations. Yield is purely about rental income.
Gross Rental Yield: The Formula
Gross rental yield is the simpler of the two calculations. It measures annual rental income as a percentage of the property’s purchase price, before any costs are deducted.
Formula:
Gross Rental Yield = (Annual Rental Income ÷ Property Value) × 100
Or in practical steps:
- Multiply the monthly rent by 12 to get annual rental income
- Divide annual rental income by the property purchase price
- Multiply by 100 to get the percentage
Worked example:
A property purchased for £180,000 rents for £850 per month.
- Annual rental income: £850 × 12 = £10,200
- Divide by purchase price: £10,200 ÷ £180,000 = 0.0567
- Multiply by 100: = 5.67% gross yield
That is a solid gross yield for most UK regions.
What gross yield is used for:
Gross yield is the standard metric used by mortgage lenders when assessing buy-to-let affordability. It is also the figure used in most published UK rental yield data and regional comparisons. It is useful for quickly comparing multiple properties on the same basis, particularly when you do not yet have full cost data.
The limitation of gross yield is obvious: it ignores all costs, which can significantly erode the actual return.
Net Rental Yield: The Formula
Net rental yield is the more accurate and commercially meaningful number. It deducts the annual costs of owning and managing the property before calculating the return.
Formula:
Net Rental Yield = ((Annual Rental Income − Annual Costs) ÷ Property Value) × 100
Annual costs to include:
- Letting agent fees (typically 10–15% of monthly rent if using a fully managed service)
- Buildings insurance
- Landlord liability insurance
- Gas safety certificate (annual)
- Electrical installation condition report (EICR — required every 5 years)
- Routine maintenance and repairs (a common rule of thumb is 1% of property value per year)
- Ground rent and service charges (leasehold properties)
- Mortgage interest payments (for mortgaged properties — see the note below)
- Accountancy fees
- Void periods — typically estimated at 4–8 weeks of lost rent per year
Worked example:
Same £180,000 property, £850 per month rent.
Annual rental income: £10,200
Annual costs:
- Letting agent (10%): £1,020
- Buildings insurance: £300
- Gas safety certificate: £80
- Maintenance (1% rule): £1,800
- Service charge (if leasehold): £0 (freehold in this example)
- Void allowance (4 weeks): £850
Total annual costs: £4,050
Net annual income: £10,200 − £4,050 = £6,150
Net Rental Yield: £6,150 ÷ £180,000 × 100 = 3.42%
The property that looked like a 5.67% investment on gross yield is actually delivering 3.42% after costs — a significant difference that would affect any investment decision.
Note on mortgage interest:
Mortgage interest is the single largest cost for most landlords and can reduce net yield by several percentage points. However, it is more accurately treated as part of cash flow analysis rather than a pure yield calculation, because it depends on the individual financing arrangement rather than the property’s underlying performance. Many investors calculate net yield both with and without mortgage costs — the pre-finance figure tells you about the asset; the post-finance figure tells you about your personal return.
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Net vs Gross Yield: Which Should You Use?
Use gross yield to:
- Quickly compare multiple properties at the research stage
- Benchmark against regional averages and published data
- Assess buy-to-let mortgage affordability alongside lenders
Use net yield to:
- Make an actual investment decision before purchase
- Compare a property investment against other asset classes (stocks, bonds, savings rates)
- Assess cash flow and sustainability of the investment under realistic conditions
The difference between gross and net yield is typically 1 to 2 percentage points for a managed residential property. For higher-management properties such as HMOs, the gap can be larger.
Always calculate net yield before committing to a purchase. The gross figure is a starting point, not the answer.
What Is a Good Rental Yield in the UK?
Good yield is context-dependent — it varies by location, property type, and your investment objectives. But here are broadly accepted UK benchmarks:
Below 4% — low yield. Generally found in prime London and south-east areas where capital growth potential is strongest. Acceptable only if you are prioritising asset appreciation over income.
4% to 5% — moderate yield. Typical of many established urban areas. Sustainable with modest costs, but leaves limited margin for maintenance or void periods.
5% to 6% — solid, sustainable return. Found across many UK regional cities and commuter towns. Considered the standard target for most residential buy-to-let investors.
6% to 8% — strong yield. Found in Northern cities (Manchester, Leeds, Liverpool), Midlands cities, and some Scottish markets. Often combined with reasonable capital growth potential.
Above 8% — high yield. Generally found in Northern England (Hull, Sunderland, parts of Bradford and Newcastle), student towns, and HMO strategies. Higher income return often accompanies higher management intensity, higher voids, or lower capital growth.
London specifics:
Average gross rental yields in London typically range from 2% to 5%, with prime central London often at the lower end and outer East London, commuter-zone areas, and some south-west London areas approaching 5–5.5%.
Regional UK Rental Yield Benchmarks (2025)
These are approximate gross yield ranges based on current market data:
| Region | Average Gross Yield |
|---|---|
| Prime Central London | 2–3% |
| Greater London (outer zones) | 3.5–5.5% |
| South East (outside London) | 3.5–5% |
| Manchester | 5.5–7% |
| Birmingham | 5–6.5% |
| Leeds | 5.5–7% |
| Liverpool | 6–8% |
| Sheffield | 5.5–7% |
| Scotland (Edinburgh, Glasgow) | 5–7% |
| North East England | 6–9% |
These are broad ranges. Specific streets, property types, and conditions vary substantially.
Yield vs Capital Growth: Finding the Right Balance
Rental yield and capital growth are not independent — they often pull in opposite directions.
Properties with the highest yields tend to be in lower-value markets where capital growth is slower. Properties in high-growth areas (central London, certain coastal towns, strong commuter belts) tend to have lower yields because high demand inflates property values faster than rental values.
Most investors sit somewhere in the middle: seeking yields above 5% with reasonable capital growth potential, which rules out both the ultra-low yield prime London market and the ultra-high yield but stagnant northern markets.
The right balance depends on your investment purpose:
- Income-focused investor — maximise yield; target 6%+ net yield; accept slower capital growth
- Long-term wealth builder — accept lower yield (4–5%); target strong capital growth over 10+ years
- Balanced investor — target 5–6% yield in areas with moderate growth; maintain portfolio performance across both metrics
Neither approach is wrong. But you need to know which you are before you calculate yield — because the “good yield” benchmark changes depending on what you are actually trying to achieve.
Factors That Affect Rental Yield
Void periods — every week a property sits empty is a week of lost income. A property with a 7% gross yield that experiences 12 weeks of voids per year is delivering less than a property yielding 5.5% that is occupied 50 weeks per year. Factor realistic local void periods into your net calculation.
Property type — flats tend to have lower yields than houses in the same area, partly due to service charges and ground rent. HMOs typically yield more than single-lets but have significantly higher management costs and regulatory requirements.
Leasehold costs — service charges and ground rent in leasehold properties can materially reduce net yield. A flat with a £2,500 annual service charge loses around 1.5% yield on a typical £170,000 property.
Management type — self-managing landlords retain the 10–15% management fee, which is a meaningful uplift to net yield. The trade-off is time and direct tenant management.
Mortgage rates — rising mortgage costs have compressed net yields significantly across the UK since 2022. At 5%+ mortgage rates, a property with a 5.5% gross yield on a 75% LTV mortgage may produce negative cash flow after costs.
For more information on buy-to-let tax and costs, check: HMRC — income from property
Conclusion
Rental yield is the foundation of any buy-to-let investment decision — but only if you are calculating the right figure.
Gross yield gives you a quick comparison tool. Net yield gives you the truth about whether an investment actually works.
A 7% gross yield that delivers 4% net after costs is a different investment from a 6% gross yield that delivers 4.8% net. The gross numbers lie. The net numbers tell you what your money is actually doing.
Calculate both. Factor in realistic costs. Compare net yields against your target return. And make sure rental yield is one part of the picture — not the entire picture — when assessing any property investment.
For more information on buy-to-let mortgage affordability, check: MoneySavingExpert — buy-to-let guide
Frequently Asked Questions
What is the formula for gross rental yield?
Gross Rental Yield = (Annual Rental Income ÷ Property Value) × 100. In practice: multiply the monthly rent by 12, divide by the purchase price, and multiply by 100. A property worth £200,000 renting for £900 per month produces an annual income of £10,800 and a gross yield of 5.4%.
What is a good rental yield in the UK for 2026?
A gross yield of 5% to 6% is generally considered solid and sustainable for most UK residential buy-to-let investments. Yields above 6% are considered strong and are typically found in Northern England, parts of Scotland, and high-demand student cities. London averages between 3% and 5% gross yield depending on the area, which is lower income return but often reflects stronger capital growth expectations.
Should I calculate rental yield on the purchase price or current value?
This depends on what question you are trying to answer. Use the purchase price to assess the return on your original investment. Use the current market value to assess how the property is performing in the current market — this is more relevant if you are reviewing an existing portfolio or considering remortgaging. For initial investment decisions, purchase price is the standard.
