How to Calculate Rental Yield Percentage

The core problem: a property advertised at 7% gross yield might deliver just 4.5% net once you account for voids, maintenance, insurance, and letting agent fees. That gap is the difference between a profitable investment and one that quietly bleeds cash.

This guide walks through both calculations step by step, with worked examples using realistic North London figures, so you know exactly where your property stands.

What Is Rental Yield?

Rental yield measures the annual income a property generates as a percentage of its value. It is the primary metric landlords and investors use to compare properties, assess whether a purchase makes financial sense, and benchmark performance over time.

There are two versions, and they tell very different stories:

Yield Type	What It Measures	Best Used For
Gross yield	Annual rent as a % of purchase price, before any costs	Quick comparisons between properties
Net yield	Annual rent minus all running costs, as a % of purchase price	Understanding actual profitability

Gross yield is the headline figure. Net yield is the one that matters.

The distinction is critical because running costs on a UK rental property are substantial. According to industry data, letting agent fees alone typically run at 8 to 15% of annual rent for a full management service, before a single repair bill or insurance premium is counted.

How to Calculate Gross Rental Yield

Gross yield is the starting point for any yield calculation. The formula is straightforward:

Gross Rental Yield = (Annual Rental Income ÷ Property Value) × 100

Step-by-Step

1. Multiply your monthly rent by 12 to get your annual rental income

2. Divide the annual rental income by the property purchase price

3. Multiply the result by 100 to express it as a percentage

Worked Example

Say you own a two-bedroom flat in Islington purchased for £550,000, currently let at £2,400 per month.

• Annual rental income: £2,400 × 12 = £28,800

• Gross yield: (£28,800 ÷ £550,000) × 100 = 5.24%

That figure is useful for a quick comparison with other properties. What it does not tell you is whether the property is actually making money after costs are deducted.

A Note on Property Value

Most landlords use the original purchase price in this calculation, which is the most consistent approach when comparing properties at the point of acquisition. However, if you want to understand your current yield relative to today's market, you can substitute the current estimated market value instead. This is particularly relevant in areas like North London where values have shifted significantly over time.

How to Calculate Net Rental Yield

Net yield is the number that actually reflects whether your investment is working. It strips out all running costs to show your real return.

Net Rental Yield = ((Annual Rental Income − Annual Costs) ÷ Property Value) × 100

What Counts as a Running Cost?

This is where many landlords underestimate their outgoings. The costs that should be included are:

• Letting agent fees (if using a managed service): typically 10–15% of annual rent

• Landlord insurance: typically £200–£800 per year

• Maintenance and repairs: a common rule of thumb is to budget 1% of the property's value annually

• Void periods: industry data suggests 1–4 weeks of lost rent per year is realistic

• Gas safety certificate: £60–£100 per year (legally required annually)

• Electrical installation condition report (EICR): required every five years

• Service charges and ground rent: applicable to leasehold flats

• Mortgage interest payments: if the property is mortgaged, this is a significant cost

Worked Example

Using the same Islington flat from the gross yield example: purchase price £550,000, monthly rent £2,400, annual rent £28,800.

Estimated annual costs:

Cost	Amount
Letting agent (12% of rent)	£3,456
Landlord insurance	£500
Maintenance and repairs	£2,000
Void periods (2 weeks)	£1,108
Gas safety certificate	£80
Total annual costs	£7,144

Net annual income: £28,800 − £7,144 = £21,656

Net yield: (£21,656 ÷ £550,000) × 100 = 3.94%

The real-world impact: the gross yield of 5.24% drops to 3.94% net once realistic costs are applied. That is a meaningful difference when assessing whether a property is genuinely delivering a return above inflation, mortgage costs, or alternative investments.

Note that mortgage interest is excluded from this example. If the property is mortgaged, that cost would reduce the net figure further still.

What Is a Good Rental Yield in the UK?

There is no single answer, but there are useful benchmarks.

According to the Zoopla Rental Market Report 2026, the UK private rental sector averages around 4.7% gross yield. Research from Hamptons indicates that buy-to-let purchases across England and Wales in 2026 are yielding 7.3% on average at the point of purchase, up from 6% in 2021, as higher rents have outpaced price growth in many regions.

However, context matters enormously. A 4% net yield in a high-capital-growth area like Islington may outperform a 7% gross yield in a lower-demand market, once total return (income plus capital appreciation) is factored in.

Yield Benchmarks by Context

Yield Level	What It Typically Signals
Below 3% net	Likely loss-making once mortgage costs are included
3–5% net	Acceptable in high-value areas; relies on capital growth
5–7% net	Solid return; property likely cash-flow positive
Above 7% net	Strong yield; more common outside London

The 7.7% threshold: analysis published by This is Money in September 2026 found that landlords need a gross yield of at least 7.7% to break even once mortgage rates, tax changes, and maintenance costs are fully accounted for. The average gross yield of 6.04% means many landlords are technically operating below breakeven on a cash-flow basis, relying on capital growth to justify the investment.

The London Reality

In North London, property values are high relative to rents, which compresses yields. A flat purchased for £600,000 and let for £2,500 per month produces a gross yield of just 5%. This is not unusual for the area, but it does mean net yields can sit in the 3–4% range, making it essential to model costs carefully before committing to a purchase.

For investors in this market, the investment case typically rests on a combination of rental income and long-term capital appreciation rather than yield alone.

The Costs Landlords Most Commonly Overlook

Most landlords are comfortable accounting for the obvious costs. It is the less visible ones that erode net yield without warning.

Void Periods

Every week a property sits empty is a week of lost rent with costs continuing. Even a well-managed property in a strong rental market will experience some void time between tenancies. Budget for at least two weeks per year as a minimum; in practice, refurbishment between tenants can extend this significantly.

EPC Compliance Costs

The government's proposed minimum EPC rating of C for new tenancies has created a hidden cost for landlords with older stock. Properties currently rated D or below may require investment in insulation, heating upgrades, or double glazing to comply. An EPC assessment costs £60–£120, but the remedial works it identifies can run to thousands. This is a cost that should be modelled into any yield calculation for older properties.

Stamp Duty Land Tax

For landlords calculating yield on a new acquisition, the purchase price used in the formula should ideally include all acquisition costs: stamp duty (including the additional 3% surcharge on second properties), legal fees, and survey costs. Including these gives a more accurate picture of the true capital deployed.

Example: a £550,000 purchase carries approximately £27,500 in stamp duty for a landlord (at the higher rate), plus £1,500–£2,500 in legal and survey fees. Using £579,000 as the denominator rather than £550,000 reduces the gross yield from 5.24% to 4.97%.

Tax on Rental Income

Since the phased removal of mortgage interest tax relief under Section 24 (Clause 24), landlords can no longer deduct mortgage interest from rental income before calculating tax. Instead, they receive a basic rate (20%) tax credit on mortgage interest. For higher-rate taxpayers, this significantly increases the effective tax burden. Yield calculations that ignore this overstate real returns. The Hemmingfords article on overcoming Clause 24 covers strategies for managing this in detail.

How to Improve Your Rental Yield

Yield improvement comes from two levers: increasing income or reducing costs. Both require active management.

Increasing Rental Income

• Review rent regularly. Rents across North London have risen significantly in recent years. If a tenancy has been in place for several years without a rent review, the property may be letting below market rate. Rightmove's rental market data is a useful benchmark for current asking rents by area.

• Improve the property. Strategic upgrades, particularly to kitchens, bathrooms, and energy efficiency, can justify higher rents and attract longer-term tenants. The Hemmingfords guide on maximising your rental property's value covers this in detail.

• Reduce void periods. A property that re-lets quickly loses less income between tenancies. Prompt marketing, realistic pricing, and a well-maintained property all help.

Reducing Running Costs

• Minimise maintenance costs through preventative upkeep. Addressing small issues before they escalate is consistently cheaper than reactive repairs.

• Review your landlord insurance annually. Premiums vary significantly between providers, and loyalty rarely pays.

• Consider long-term tenancies. Longer tenancies reduce the frequency of void periods and the costs associated with tenant changeovers, including cleaning, minor works, and re-letting. The benefits of long-term tenancies are worth considering as part of a yield strategy.

The compounding effect: reducing void periods by just one week per year and increasing rent by 3% on a £2,400 per month property adds approximately £1,900 to annual income. On a £550,000 property, that shifts net yield by roughly 0.35 percentage points, which is material over a multi-year investment horizon.

Yield vs. Total Return: The Full Picture

Yield is an income measure. It does not capture capital growth, which in London has historically been the dominant driver of total return for property investors.

A landlord who purchased a flat in Islington in 2010 for £350,000 and let it at a modest 4% net yield would have earned approximately £14,000 per year in net rental income. Over 15 years, that is £210,000 in income. But the same property is likely worth £600,000 or more today, representing £250,000 in capital gain before costs.

The takeaway: yield and capital growth are both legitimate investment returns. A lower-yield property in a high-growth area can outperform a higher-yield property in a stagnant market over a long enough horizon. The right metric depends on your investment goals:

• Income-focused investors (e.g. those relying on rental income in retirement) should prioritise net yield

• Wealth-building investors with a long time horizon may accept lower yields in exchange for capital growth potential

• Leveraged investors (with mortgages) need to model yield after financing costs to ensure the property is not cash-flow negative

For a fuller picture of your investment's performance, calculate your total return by combining net yield with the annualised percentage change in property value over your holding period.

Key Takeaways

• Gross yield = (Annual rent ÷ Property value) × 100. A useful starting point, but incomplete on its own.

• Net yield = ((Annual rent − Annual costs) ÷ Property value) × 100. The number that actually reflects profitability.

• The UK private rental sector averages around 4.7% gross yield; new buy-to-let purchases in 2026 are averaging 7.3% gross at acquisition, according to Hamptons.

• In North London, compressed yields are normal. The investment case often rests on capital growth alongside income.

• Void periods, EPC compliance costs, and the impact of Clause 24 are the most commonly underestimated costs in a net yield calculation.

• Yield alone does not capture total return. Factor in capital appreciation to assess the full performance of a property investment.

If you are considering a buy-to-let purchase in North London or want to understand whether your existing property is performing as well as it should, the Hemmingfords property management team can provide a frank assessment of current market rents and running costs in your area.

FAQs

What is the formula for calculating rental yield percentage?

Rental yield percentage is calculated by dividing annual rental income by the property value, then multiplying by 100. For gross yield, use rent only. For net yield, subtract annual costs first. Net yield gives the more accurate picture because it reflects the property’s real running expenses.

What is the difference between gross yield and net yield?

Gross yield measures rent as a percentage of property value before costs. Net yield deducts costs such as insurance, maintenance, voids, and letting fees before the percentage is worked out. Gross yield is useful for quick comparisons, but net yield is the figure that shows actual profitability.

What is a good rental yield in the UK?

There is no single benchmark, but gross yields around 4% to 5% are common in higher-value areas, while net yields above 5% are generally stronger. In London, lower net yields can still be acceptable if the property has solid capital growth potential and low void risk.

Should I use purchase price or current market value when calculating yield?

Use purchase price if you want to measure your return from the day you bought the property. Use current market value if you want to understand today’s yield based on current equity. Both are valid, but the denominator should match the question you are trying to answer.

What costs should I include in net yield?

Include letting agent fees, insurance, repairs, void periods, safety certificates, service charges, ground rent, and mortgage interest if you are modelling cash flow. If you are buying a property, add acquisition costs such as stamp duty and legal fees as well. The more complete the cost base, the more reliable the result.

Does yield tell me whether a property is a good investment?

Not on its own. Yield shows income return, but it does not include capital growth, tax, or financing. A lower-yielding property in a strong location can outperform a higher-yielding property elsewhere once long-term price growth is included.