The Myth: A Higher HMO Rent Roll Automatically Means Higher Profit
HMOs generate more gross income, but the costs are substantially higher too. Management, utilities, compliance, licensing, and higher void sensitivity can mean a large HMO underperforms a simple single-let.
The HMO (House in Multiple Occupation) model is marketed as the ultimate yield strategy — rent a 4-bed house to 4 individual tenants and collect 4× the per-room rate. Gross income that looks impressive on paper can hide a brutal cost base.
Unlike a single-let where the tenant pays their own bills, an HMO landlord typically covers all utilities (gas, electric, water, broadband, council tax) which can add £400–£800/month to overheads. Mandatory HMO licences cost £300–£1,200 per property, per cycle. Fire safety compliance (interlinked alarms, fire doors, fire blankets, emergency lighting) can cost £2,000–£5,000 to install correctly. HMO-specific management is 12–15% of gross rent (vs 8–10% for single-lets) because of the higher tenant turnover and maintenance demands.
Additionally, each room vacancy is a proportionally larger income hit than a standard void. Losing one tenant in a 4-bed HMO means a 25% revenue drop instantly. Before committing to HMO strategy, every investor should model the full net cash flow — not just the gross rent roll.