HMO Returns: Realistic Expectations

HMO returns are usually quoted as gross yield: total room rents added up and divided by the property's purchase price. That figure is real, but it is not what lands in your pocket. Once voids between sharers, higher bills, heavier wear and tear, management costs and the compliance load specific to HMOs are taken into account, net HMO returns are typically meaningfully lower than the headline gross figure suggests, though usually still ahead of the same property let as a single tenancy.

This guide sets out the realistic cost base behind an HMO's gross income, works through what a genuine net return looks like once that cost base is applied, and covers the main variables that move an HMO from a strong investment to a marginal one.

Why gross yield overstates the return

A gross yield calculation, annual room rents divided by purchase price, treats every pound of rent as if it reaches you untouched. In practice, an HMO's cost base sits well above a single let's, for several reasons specific to room-by-room letting:

• Bills included in rent. Most HMO room rates include gas, electricity, water and often broadband, because splitting individual utility accounts between several unrelated sharers is impractical. These costs come straight off the top of the gross figure and rise with energy prices in a way a single let's rent, where the tenant pays bills separately, does not.
• Higher void frequency. Individual sharers move on more often than a family in a single let, since room shares suit people at a particular life stage rather than a long-term home. Even with several rooms spreading the risk, the total number of changeovers across a year, and the marketing time needed to fill each one, is higher than a single tenancy's occasional renewal.
• Heavier wear and tear. Shared kitchens and bathrooms used by several unrelated people see far more use than the equivalent rooms in a single-household home, and furnishings, flooring and white goods in communal areas wear out faster as a result.
• Management cost. Many HMO landlords use a managing agent given the volume of tenancies and turnover to handle, and HMO management fees are typically higher than a single let's, reflecting the extra work involved.
• Compliance cost. Fire safety equipment, additional certificates, and licence fees, where a licence is required, are ongoing costs that a single let does not carry to the same extent.

A worked example

Take a five-bedroom HMO bought for £280,000, with five rooms let at £550 a month each, including bills, giving gross rental income of £2,750 a month, or £33,000 a year, a gross yield of roughly 11.8%.

Against that £33,000, a realistic annual cost base might look like: bills across the property at £6,000, void and turnover allowance, assuming an average of two room changeovers a year, each with roughly three weeks void and marketing, at around £3,000, maintenance and wear and tear allowance at £2,500, management fees at 12% of rent (£3,960), licensing and compliance costs, fire safety equipment, certificates and a licence fee amortised over its term, at £800, insurance at £900, and mortgage interest, assuming an HMO mortgage on a meaningful deposit, at roughly £9,500 a year.

Adding those together gives total costs of around £26,660, leaving a net income of roughly £6,340 a year, a net yield of about 2.3% on the purchase price, well below the 11.8% gross figure, though this ignores any capital growth. These specific numbers will not match every HMO; they illustrate the scale of the gap between gross and net, not a rule you can apply directly to a different property.

A second scenario: full occupancy

The example above assumes two changeovers a year and normal running costs. Consider the same five-bedroom HMO achieving full occupancy for eleven months of the year, with fewer changeovers because sharers stay longer, cutting the void and turnover allowance to around £1,200 and modestly reducing marketing and cleaning costs elsewhere. Total costs fall to roughly £24,860, and net income rises to about £8,140 a year, a net yield of around 2.9% rather than 2.3%. The gap between the two scenarios, driven almost entirely by occupancy and tenant turnover rather than anything about the property itself, illustrates why occupancy management is usually a bigger lever on an HMO's real return than the rent per room a landlord manages to achieve.

Variables that move the return

Occupancy rate. An HMO running at full occupancy year-round looks very different from one that regularly sits with one or two empty rooms. Because void cost scales with the number of rooms rather than being a single all-or-nothing event, a chronically under-let HMO with several rooms sitting empty simultaneously can quietly erode a return that looks strong on paper.

Self-management versus an agent. Self-managing removes the management fee from the cost base, often the single largest controllable cost, but only if you genuinely have the time and local presence to handle frequent viewings, move-ins and tenant issues without the quality of management slipping, which itself drives voids and complaints.

Licensing costs and requirements. Areas with additional or selective licensing schemes add a further compliance cost on top of any mandatory national HMO licence, and requirements, minimum room sizes, amenity ratios, can force capital spend to bring an older conversion up to standard before it can be licensed at all. Our HMO licence requirements guide sets out when these apply.

Property condition and location. An HMO in a strong rental area for sharers, close to transport links, employers or a university, fills rooms faster and holds occupancy better than one in a weaker location, and this occupancy effect usually moves the net return more than almost any other single variable.

Improving the return

A handful of practical levers move an HMO's net return more reliably than chasing a higher room rate. Reducing turnover, through fairly priced, well-maintained rooms and responsive management, keeps void periods down more effectively than marketing harder once a room is already empty. Reviewing energy costs regularly, since bills are usually included in the rent, protects margin against rising utility prices in a way a single let's landlord, who is not paying the bills, does not need to worry about. Comparing management fees between agents, or weighing self-management honestly against the time it actually takes, is often the largest single cost line available to influence directly. None of these change the property itself, but together they can move a marginal HMO into a genuinely strong one, or a strong one into a significantly better one, more reliably than hoping for capital growth to do the work instead.

Setting realistic expectations

A well-run HMO in a strong area, bought at a sensible price, can outperform the equivalent single let on net return, sometimes significantly. A poorly located, under-managed or over-leveraged HMO can underperform a single let once the full cost base and void reality are accounted for honestly. The gap between the two outcomes is mostly down to management quality and location, not the HMO model itself. Before buying, build a full costed projection, not a gross yield figure, and stress test it against a lower occupancy scenario. Our single let versus HMO guide is a useful companion piece if you are deciding between the two models for a specific property.

How Property HQ helps

Property HQ tracks every cost line against an HMO, room-level income, bills, maintenance and management fees, so your real net return is visible property by property, rather than relying on the gross yield figure that first attracted you to the deal.

Disclaimer

This guide is general information for UK landlords, not financial advice. The figures in the worked example are illustrative only and will not match every HMO. Build your own costed projection for a specific property before investing.