An HMO advertised at a 10% yield can quietly return 6% once the real costs land. That gap between the headline figure and what actually reaches your bank account is where most first-time HMO investors get caught out. This guide shows you how to tell the two apart, run the numbers yourself, and judge any deal on the figure that matters: net yield, and the return on the cash you actually invest.
What gross yield actually measures
Gross yield is the simplest measure in property, and the one most often quoted in listings and agent brochures.
Gross yield = (annual rent / purchase price) x 100
If a Liverpool property costs £150,000 and the rooms bring in £15,000 a year, the gross yield is 10%. It is a quick sanity check and a fair way to compare two properties in the same market. It is not, however, a measure of profit. Gross yield ignores everything it costs to run the property – and in an HMO, that list is longer than most investors expect.
Why gross yield flatters an HMO
HMOs carry more costs than a single-let property, for the simple reason that they house more people, more often.
Typical ongoing costs that a gross yield ignores:
- Voids and room turnover: with five or six rooms, you have five or six chances a year to lose income. One room empty for six weeks can wipe out thousands in budgeted rent.
- Bills: unless tenants pay their own, gas, electricity, water and broadband come out of your rent.
- Management and lettings fees: usually a percentage of the rent collected.
- Maintenance and repairs: more bathrooms, more kitchens, more wear.
- Compliance: licensing, gas safety, electrical checks, fire safety and EPC requirements all carry a cost.
- Cleaning and communal upkeep.
A property showing 10% gross can easily settle at 6-7% net once these are accounted for. That is still a strong HMO – the point is that the number on the brochure is not the number in your account.
How to work out net yield
Net yield runs the same sum, but subtracts the cost of running the property from the rent first.
Net yield = ((annual rent – annual running costs) / (purchase price + setup costs)) x 100
Work through it in five steps:
- Add up gross annual rent – the full rent if every room were let for twelve months.
- Subtract a realistic void allowance – not zero. Six to eight percent of rent is a sensible starting assumption for a well-run HMO.
- Subtract running costs – bills, management, maintenance, insurance, licensing and compliance.
- Add the full acquisition cost to the purchase price – stamp duty, legal fees, refurbishment and furniture. This is the money you actually spend.
- Divide, then multiply by 100.
A worked example
Take a Liverpool HMO bought for £150,000, with £20,000 of refurbishment and setup, so £170,000 all in.
Gross rent across five rooms: £18,000 a year.
Running costs:
- Voids (7%): -£1,260
- Bills: -£2,400
- Management and lettings: -£1,800
- Maintenance and repairs: -£1,200
- Insurance, licensing and compliance: -£1,000
Total costs: £7,660. Net rent: £10,340.
Net yield = (£10,340 / £170,000) x 100 = 6.1%
The headline gross yield was 12% (£18,000 / £150,000). The real net yield is 6.1%. Same property, half the story.
What counts as a strong return on cash invested
Net yield is only half the picture. Most investors put down a deposit plus costs and borrow the rest, so the figure that determines your actual return is cash-on-cash ROI:
ROI = (net annual income / total cash invested) x 100
If you invested £50,000 of your own money and the property returns £7,500 net after mortgage interest, that is a 15% return on cash – a far more useful number than any headline yield.
At Uptrend Estates, our delivered Liverpool investments have achieved rental yields above 10% and ROI above 15% on cash invested. Those figures are net of the costs above, which is exactly why they mean something.
Red flags to look for in a deal
- A yield quoted with no void allowance – treat it as optimistic.
- Bills, cleaning or management left out of the cost sheet entirely.
- A purchase price that ignores stamp duty and refurbishment.
- Only the best room’s rent used to illustrate the return.
- Fees deducted before costs, so the “percentage” never touches the real spend.
- No compliance schedule – licensing and safety costs do not disappear because a spreadsheet omits them.
How a transparent management model changes the numbers
Fees are one of the easiest costs to hide inside a yield calculation, and one of the easiest to state plainly.
Uptrend Estates charges management fees monthly, after essential costs, rather than asking for a lump sum upfront. Our lettings service is a flat 5% of annual rent – whether that is a private tenant or a company let. When fees are transparent and taken after costs, the net yield you calculate is much closer to the net yield you actually receive.
The bottom line
Gross yield tells you what a property could earn in a perfect year. Net yield, and return on cash invested, tell you what it will earn in a real one. Always run the second calculation before you commit – and ask any agent or manager to show you the costs, not just the rent.
If you want a Liverpool HMO that is modelled on net numbers from day one, talk to Uptrend Estates about our turnkey investment and property management services.
