Annual running costs for a typical 5-bed HMO break down as: agent management (12–15% of rent): £4,000–£6,000 · bills: £5,000–£8,000 · maintenance (1.5–2% of value): £3,500–£6,000 · insurance: £700–£1,400 · compliance (gas certificate, EICR amortised, licence): £600–£900 · voids and turnover: £1,000–£3,000. Total annual running costs: £15,000–£25,000 on a typical 5-bed. Self-management saves the agent fee but requires 4–8 hours of personal time per month and direct responsibility for all compliance, tenant issues, and maintenance coordination.
Agent vs self-managed cost comparison
Enter your HMO details to see the annual cost difference between professional management and self-management.
| Management fee | — |
| Tenant find fees (est.) | — |
| Bills | — |
| Maintenance | — |
| Insurance + compliance | — |
| Annual total | — |
| Management fee | £0 |
| Tenant find (DIY advertising) | — |
| Bills | — |
| Maintenance | — |
| Insurance + compliance | — |
| Annual total (cash) | — |
HMO letting agent fees — what you actually pay
HMO management requires more active involvement than single-let management — higher tenant turnover, room-by-room letting, compliance checks, and bill management create a more demanding brief. This is why specialist HMO agents charge 12–15% compared to 8–10% for standard single-let management. The fees also have a different structure.
Management fee (monthly)
Charged as a percentage of the monthly rent collected. On a 5-bed HMO at £575/room = £2,875/month gross, a 13% fee costs £374/month (£4,485/year). This typically covers: rent collection and arrears chasing, property inspections (typically quarterly), maintenance coordination (arranging contractors), tenant communications, compliance record management, and monthly financial reporting. What it does not cover: tenant find, major works, HMO licence applications, or utility bill management (unless specified).
Tenant find fee
Charged when a new tenant is found for a vacant room. Typically 1–2 weeks' rent per room — at £575/room this is £575–£1,150 per tenant placement. For a 5-bed HMO with 30% annual room turnover (1.5 rooms vacating per year), tenant find costs run approximately £860–£1,725/year. Some agents charge a fixed fee per room (£350–£600) rather than a percentage.
Additional fees to watch for
- Renewal fees — some agents charge for renewing existing tenancies (typically £50–£150 per renewal). Negotiate this out where possible.
- Inspection fees — most agents include quarterly inspections in the management fee; some charge separately (£50–£100 per inspection).
- Maintenance handling fee — some agents add a markup (5–15%) on contractor invoices above a threshold. Always ask whether quoted maintenance costs include an agent uplift.
- Void period fee — a small number of agents charge a reduced management fee during void periods. Most simply do not charge when the room is empty — confirm this in the management agreement.
- Checkout and deposit dispute fees — inventory and checkout services (typically £80–£150 per room) and deposit dispute handling may be charged separately.
Landlord-paid bills — the biggest hidden running cost
Unlike standard single-let properties where tenants pay their own bills, HMO landlords almost universally pay utility costs as part of the room rent package. This is the largest single ongoing cost difference between an HMO and a standard BTL — and the cost most commonly underestimated by new HMO investors.
| Utility | Typical monthly cost (5-bed) | Annual cost | Notes |
|---|---|---|---|
| Gas (heating + hot water) | £120–£200 | £1,440–£2,400 | Highly variable by season. Old boilers or poor insulation can push this significantly higher. |
| Electricity | £150–£280 | £1,800–£3,360 | 5+ tenants each charging phones, laptops, TVs, gaming consoles. Lighting, kitchen appliances, washing machine. |
| Water and sewerage | £60–£100 | £720–£1,200 | Typically metered for HMOs or at enhanced rates. 5 showers and cooking daily adds up. |
| Council tax | £0 (student HMOs exempt) | £0–£1,800 | Full-time student HMOs are entirely exempt. Mixed occupancy (some non-students) may create a partial liability. |
| Broadband | £25–£50 | £300–£600 | A standard cost. Fast broadband (100Mbps+) strongly preferred by tenants and reduces void risk. Budget £35–£50/month for a competitive package. |
| TV licence | £14 | £169 | Required if any tenant watches live TV or uses BBC iPlayer, even on personal devices. |
| Total bills | £370–£644/mo | £4,429–£7,729 | Use actual utility readings from the previous year where possible. Energy costs remain volatile. |
Smart meters. Request smart meters for gas and electricity — they give real-time consumption data, eliminate estimated bills, and help identify unusually high usage quickly. Most suppliers install them free of charge.
Bills management services. Several specialist HMO bills management companies (e.g. Glide, Huddle) offer fixed monthly pricing per HMO — you pay a set amount and they handle all utilities. This converts variable energy costs into a predictable monthly expense. Costs typically £80–£130/month above actual utility costs for the administrative service.
EPC improvements. An EPC C-rated property uses meaningfully less energy than a D or E. Loft insulation, cavity wall insulation, and boiler upgrades that improve the EPC rating reduce annual bills by £500–£1,500 and are increasingly required by forthcoming minimum standards legislation.
Maintenance and repairs — budgeting for the unpredictable
HMOs have higher wear and tear than standard single-let properties. Five or six unrelated adults sharing a kitchen, bathrooms, and communal areas creates more intensive use of every appliance, fitting, and surface. The standard rule for single-let maintenance budgeting — 1–1.5% of property value per year — increases to 1.5–2% for HMOs due to this accelerated wear.
On a £275,000 property, this means budgeting £4,125–£5,500 per year for maintenance. This is not a figure you will spend evenly — maintenance costs are lumpy. You may have three quiet years followed by a year with a boiler replacement (£1,500–£3,000), a kitchen appliance cluster (£800–£1,500), and a bathroom re-grout and tile repair (£400–£800). The annual provision smooths this lumpy reality into a consistent budget line.
Most common HMO maintenance items and typical costs
- Washing machine replacement: £400–£700 (budget 1 every 3–5 years in heavy use)
- Fridge-freezer replacement: £300–£600
- Boiler service: £80–£120/year; boiler replacement: £1,800–£3,500
- Fire door replacement (damaged by tenants): £200–£450 per door
- Smoke/heat detector replacement: £80–£150 per unit
- Kitchen worktop and unit repairs: £200–£600
- Bathroom re-seal and tile repair: £150–£400
- General decorating (between tenants): £300–£800 per room
- Drain clearances (grease, hair blockages — HMOs are especially prone): £80–£200 per call-out
- Lock changes (between tenancies — best practice for security): £80–£150 per door
Annual running cost summary — 5-bed HMO at £575/room
The full cost picture for a typical professionally managed 5-bed HMO in a university city. Gross annual rent: £34,500 (at 100% occupancy); effective rent at 90% occupancy: £31,050.
| Cost item | Annual amount | % of gross rent | Avoidable by self-managing? |
|---|---|---|---|
| Letting agent management (13%) | £4,037 | 11.7% | Yes — self-manage |
| Tenant find fees (1.5 rooms/year) | £1,294 | 3.7% | Partially — DIY advertising ~£200 |
| Landlord-paid bills (gas, elec, water, broadband) | £6,240 | 18.1% | No — landlord-paid always |
| Maintenance and repairs (1.75% of £275k) | £4,813 | 13.9% | Partially — self-managing reduces labour overhead |
| Buildings insurance (HMO) | £950 | 2.8% | No |
| HMO licence (amortised) | £220 | 0.6% | No |
| Annual gas safety certificate | £95 | 0.3% | No |
| EICR (amortised over 5 years) | £50 | 0.1% | No |
| Fire extinguisher service | £60 | 0.2% | No |
| Accountancy | £450 | 1.3% | Partially |
| Total annual running costs | £18,209 | 52.8% |
Running costs consume approximately 53% of gross rent on a professionally managed 5-bed HMO at these assumptions — before mortgage interest. This is significantly higher than a standard single-let where running costs typically represent 30–40% of gross rent. The difference is primarily the landlord-paid bills, higher management fees, and greater maintenance intensity.
Frequently asked questions
Is 12–15% a fair rate for HMO management?
Yes — 12–15% is market rate for specialist HMO management in 2025. The premium over standard single-let management (8–10%) reflects the greater complexity: room-by-room letting with multiple concurrent tenancies, bill management, more frequent inspections, higher maintenance coordination volume, and HMO compliance oversight. If an agent is quoting 8–10% for full HMO management, check what is and isn't included — they may be pricing for a standard BTL service level that's inadequate for a properly run HMO.
How much time does self-managing an HMO take?
A well-running HMO that is fully occupied and has good tenants typically requires 4–6 hours per month of management time: responding to tenant queries, coordinating maintenance, monthly bill payment and reconciliation, and basic administration. This increases significantly during void periods (advertising, viewings, referencing), tenant changeovers (check-out inspections, cleaning coordination, key handover), and periods of maintenance activity.
Budget for 8–12 hours per month as a realistic average across the year once void periods and maintenance spikes are included. For an investor with a day job, this is manageable for one property. Across three or more HMOs, the cumulative time commitment approaches a part-time job, and most investors at that scale move to professional management for at least some properties.
What should a specialist HMO management agreement include?
A good HMO management agreement should specify: management fee percentage and what it covers; tenant find fee (per room, not per property); what happens to the management fee during void periods; the agent's authority level for maintenance spending without landlord approval (typically up to £200–£300 for routine repairs); frequency of property inspections; how rent arrears are handled; notice period to terminate the agreement; and what happens at the end of the agreement (return of keys, transfer of tenancy documents, deposit transfers). Read the entire agreement before signing — small print on maintenance markups and renewal fees is where costs can escalate.
Can I reduce landlord-paid bills in an HMO?
Yes — there are several practical approaches. Improving the EPC rating (loft insulation, cavity wall insulation, more efficient boiler) reduces energy consumption and can cut annual bills by £500–£1,500 on an older property. Smart thermostats (Nest, Hive) with zone control let the landlord set minimum/maximum temperatures, preventing tenants from running heating at maximum 24 hours a day. Clauses in the tenancy agreement setting reasonable heating usage expectations can help, though enforcement is difficult. Energy-efficient LED lighting, A-rated white goods, and low-flow shower heads each contribute marginal savings. Bills management services (Glide, Huddle) add cost but provide predictability — useful for budgeting even if not cheaper in total.
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