HMO SPECIALIST GUIDE • JANUARY 2026

HMO Energy Comparison 2026

Cut utility costs in shared properties. Save £500-£3,000+ annually with HMO-specific energy strategies for bills-included rentals and multi-tenant properties.

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£3,000+
Large HMO Annual Saving
2-3x
Higher vs Single Household
100%
Landlord-Paid Bills
£1,000+
Medium HMO Annual Saving

Why Energy Costs Are Higher in HMOs

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Higher Occupancy

Multiple tenants = simultaneous cooking, heating, washing. Consumption 2-3x higher than single households requires specific tariff comparison.

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Landlord-Paid Bills

Most HMOs operate "bills included" arrangements. Landlords bear 100% of energy costs, making efficient tariffs essential for profitability.

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Business Energy Complexity

Many HMOs require commercial energy contracts without price cap protection. Poor choices here increase costs 20-40%.

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Frequent Tenant Changes

Regular turnover triggers void periods and deemed tariffs. Each change can cost hundreds without active energy management.

Domestic vs Business Energy for HMOs

Domestic Energy

Often cheaper if HMO qualifies

✅ Standard domestic meter required

✅ Solely residential use

✅ Ofgem price cap protection

✅ Safer for many smaller HMOs

CHECK ELIGIBILITY FIRST

Business Energy

Sometimes required for HMOs

✅ Commercial classification

✅ Business meter installed

✅ Serviced/short-let operation

✅ No price cap protection

COMPARISON CRITICAL HERE

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Total Annual Cost Matters for HMOs

Compare total cost including standing charges and unit rates. High HMO consumption means even 0.5p/kWh differences add £500+ annually. Fixed tariffs with 1-3 year terms provide optimal balance for bills-included arrangements, protecting margins from market volatility.

Average Energy Costs for HMOs (2026)

HMO Size Typical Annual Energy Cost Landlord Management Required
3–4 Tenants
Small HMO
£2,000 – £3,000 Regular tariff reviews. Domestic/business eligibility check essential.
5–6 Tenants
Medium HMO
£3,000 – £4,500 Business energy likely required. Quarterly comparison recommended.
7+ Tenants
Large HMO
£4,500 – £6,500+ Complex commercial contracts. Professional procurement advised.

Deemed Tariff Impact on HMO Costs

Competitive Fixed
£2,800/yr
Deemed Tariff
£4,200/yr
Postcode-Compared
£2,500/yr
Market Average
£3,400/yr

Typical 5-tenant HMO: Deemed tariffs cost 40-50% more than competitively sourced rates. Postcode-specific comparison saves £1,400+ annually.

⚠️ Why Deemed Tariffs Destroy HMO Profitability

If energy isn't actively managed: HMO defaults to deemed tariff • Unit rates increase 20-40% immediately • No supplier competition • Even short void periods cost hundreds • Tenancy changes trigger automatic deemed rates • HMOs suffer this repeatedly without active comparison.

Fixed vs Variable Tariffs for HMOs

Fixed Energy Tariffs

RECOMMENDED FOR HMOS

✔ Predictable monthly costs

✔ Protection from price spikes

✔ Easier "bills-included" budgeting

✔ 1-3 year terms optimal

SAFEST FOR HMO LANDLORDS

Variable Tariffs

HIGH RISK FOR HMOS

✖ Prices change without notice

✖ Impossible margin management

✖ Rarely cheapest long-term

✖ Budgeting uncertainty

AVOID FOR BILLS-INCLUDED HMOS

Common Energy Mistakes HMO Landlords Make

Leaving Deemed Tariffs

Properties default to expensive deemed rates during tenant changes. Many landlords don't switch, costing £200+ per void period.

Wrong Energy Type

Using domestic comparison for commercial HMOs or business comparison for eligible domestic HMOs. Both errors increase costs 20-30%.

Ignoring Standing Charges

Focusing only on unit rates. HMO standing charges matter significantly for properties with continuous baseline consumption.

Broker Commissions

Using traditional brokers who add hidden 0.5p-2p/kWh commissions. These add £500-£2,000+ annually to HMO energy costs.

Best Time to Compare Energy for HMOs

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Before Contract End

Start comparing 2-4 months before fixed tariff ends. Avoid automatic rollover to expensive rates with 30-90 day notice periods.

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During Void Periods

Compare immediately when property empties. Deemed tariffs apply within days, costing hundreds monthly if unaddressed.

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Tenant Number Changes

When adding/removing tenants, consumption patterns change. Re-evaluate tariff suitability for new occupancy levels.

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Market Price Drops

Monitor wholesale markets. Significant drops (10%+) may justify early switching if savings outweigh exit fees.

How Much Can HMO Landlords Save?

Small HMOs (3-4 tenants): £500–£1,000/year | Medium HMOs (5-6 tenants): £1,000–£2,000/year | Large HMOs (7+ tenants): £3,000+/year

Stop Energy Costs Eroding HMO Profits

Compare HMO-specific energy tariffs today. Manage multi-tenant consumption, avoid deemed tariff traps, and protect your rental margins with strategic energy procurement.