How to Calculate Rental Yield in the UK: Gross, Net and What Actually Matters

Rental yield is the single most useful number for comparing buy-to-let investments. It tells you how much income a property generates relative to what you paid for it. But the headline figure you see on property portals and agent brochures is almost always the gross yield, which ignores all the costs that come between rent collected and money in your pocket.

This guide explains how both figures are calculated, what costs you need to include to get to a meaningful net yield, and what the numbers typically look like across different UK regions.

Gross rental yield: the basic calculation

Gross rental yield is simply annual rent divided by property value, expressed as a percentage. If a property costs £200,000 and rents for £900 per month, the annual rent is £10,800. Divide that by £200,000 and multiply by 100 to get 5.4%. That is the gross yield.

Gross yield is useful for a quick first filter. If two similar properties have yields of 6.5% and 4.2%, the first one is worth examining more closely. But you should never make a purchase decision based on gross yield alone because the costs of running a rental property vary significantly and can completely change whether an investment makes sense.

Net rental yield: what you need to know

Net yield deducts all your running costs from the annual rent before dividing by the property value. Getting to a genuine net yield requires being honest about every cost you will incur as a landlord.

Using the earlier example: a £200,000 property renting for £900 per month with full management at 10% plus typical costs might see annual deductions of around £2,200 to £2,800. Net annual income falls to roughly £8,000 to £8,600, giving a net yield of 4.0% to 4.3% rather than the 5.4% gross. This is a meaningful difference when comparing investments.

Why void periods matter more than people think

A void period is when the property is empty and no rent is coming in. During this time you still pay the mortgage, insurance, council tax if it is not covered by a tenant, and any maintenance work between tenancies. Voids eat into yield in a way that is easy to underestimate when running numbers on paper.

A property that is vacant for one month in a year on a £900 per month rent loses £900 of income. On a conservative budget, you should assume roughly one month of void per year as a planning assumption, though well-managed properties in strong rental markets can do considerably better than this.

Regional rental yields across the UK

Rental yields vary dramatically by location and this is one of the most important factors in UK buy-to-let investment. London is the most obvious example. Properties in London are very expensive relative to rents, which pushes yields down to 3 to 4% gross in many areas. Meanwhile cities like Manchester, Liverpool, Sheffield, Nottingham and parts of the North East regularly produce gross yields of 6 to 9% on the right properties.

This does not mean London is a bad investment. Lower-yielding areas often see stronger capital growth over time, so the total return can be competitive or superior to higher-yielding areas. But if your goal is monthly cash flow, high-yield northern and Midlands cities tend to perform better on pure income terms.

Some of the highest-yielding areas for residential buy-to-let in 2025 include parts of Liverpool and Manchester where you can still find properties at £80,000 to £130,000 achieving rents of £650 to £900 per month. At those numbers even after deducting costs the cash flow is meaningfully positive. Properties in prime London locations at £600,000 renting for £2,200 per month are running at roughly 4.4% gross and often below 3% net after costs.

HMO properties and higher yields

Houses in Multiple Occupation, where you rent individual rooms to separate tenants rather than the whole property to one household, typically produce significantly higher yields. Renting four rooms individually in a property can generate 40 to 60% more rental income than renting the same property as a single unit. Gross yields of 8 to 12% are achievable in well-chosen HMO markets.

The trade-off is complexity. HMOs require a licence from the local council if they have five or more occupants across two or more households. There are additional fire safety requirements including interlinked smoke alarms, fire doors and clear escape routes. Management is more intensive because you have multiple tenants with separate tenancy agreements and individual rent payments. Void management is more complex. And many mortgage lenders charge higher rates for HMO lending. The yields can justify the additional effort, but going in with clear eyes about the workload is important.

Tax and yield: the part many investors overlook

Even after calculating a solid net yield, the picture is not complete without accounting for tax on rental income. Since 2020, residential landlords can no longer deduct mortgage interest from rental income before calculating the tax owed. Instead there is a basic rate tax credit of 20% on the interest paid. This change hit higher and additional rate taxpayers particularly hard and significantly reduced the profitability of leveraged buy-to-let for many investors.

If you are a higher rate taxpayer and financing your buy-to-let with a mortgage, the after-tax return can be meaningfully lower than the pre-tax net yield suggests. Running the calculation through to after-tax income gives you the most accurate picture of whether the investment actually works for your financial situation.