On this page

What counts as an HMO for UK tax purposes

There are two relevant HMO definitions in UK law:

Section 254 of the Housing Act 2004 — the "standard" HMO

A property where at least three tenants from two or more "households" share basic amenities (kitchen, bathroom). A household is typically a single family unit. Three unrelated tenants sharing a kitchen = HMO.

Section 257 HMO — the "purpose-built" / converted flats HMO

A property converted into self-contained flats but where the conversion doesn't meet 1991 Building Regulations standards, or where less than two-thirds of the flats are owner-occupied. Mostly relevant for older converted houses.

Mandatory HMO Licensing applies to all HMOs with five or more occupants from two or more households (regardless of property size). Many local authorities also operate additional / selective licensing schemes covering smaller HMOs — check the local authority's HMO register before purchase.

For tax purposes, an HMO is treated as a single residential property — there's no separate "HMO" tax regime. But the operating costs are different from standard BTL, leading to different allowable-expense profiles.

Licensing costs — fully deductible

HMO licence fees and the costs of meeting licensing conditions are all fully deductible against rental income. This includes:

The licensing infrastructure costs are typically £2,000-£5,000 upfront for a new HMO licence application, plus £500-£1,500/year for ongoing renewals and required inspections. All deductible against rental income as revenue expenses (or capital allowances where appropriate for capital items like fire alarm systems — though most are now revenue expenses post-2017 reforms).

Council tax — usually included in rent

Most HMO landlords include council tax in the rent and pay it themselves (rather than each tenant being separately responsible). This is partly because individual tenancies make it impossible to assign council tax to one tenant.

From 1 December 2023, the law changed: any HMO where rooms are let on individual tenancies (the typical HMO model) is treated as a single dwelling for council tax purposes. The landlord is liable for the full council tax, charged at the property's band.

This means:

Before the December 2023 change, councils took different approaches — some banded each room separately, leading to landlords getting hit with multiple council tax bills on the same property. The current rule is simpler but means landlords carry the cost directly.

HMO-specific allowable expenses

Beyond standard BTL allowable expenses, HMOs typically have additional cost categories:

Net yield on HMOs is typically 60-75% of gross yield once these operating costs are factored in. The headline "12% gross yield" of an HMO often nets to 7-9% after all expenses — still better than standard BTL but not by as much as the gross number suggests.

Article 4 areas — planning permission required

Article 4 of the Town and Country Planning (General Permitted Development) Order removes the standard "permitted development" right to convert a C3 (single dwelling) to a C4 (small HMO, 3-6 occupants from 2+ households) in designated areas.

In Article 4 areas — common in many London boroughs (Newham, Hackney, Croydon), Manchester city centre, Birmingham, Bristol, Liverpool, Sheffield, Nottingham, Cardiff and others — you need full planning permission to convert an existing house to an HMO. Refusals are common, particularly in areas with high HMO density.

This doesn't affect tax treatment directly, but it affects which properties can legally be operated as HMOs. Always check Article 4 status before buying any property intended for HMO conversion — refusals leave you with a regular dwelling you may not have wanted.

VAT and HMOs

Residential let income (including HMO rental) is exempt from VAT. You don't charge VAT on rent and you can't reclaim input VAT on letting-related costs.

If you also provide non-residential services bundled with the let (e.g. a "co-living" operation that includes housekeeping, events, gym access, food), those services may be VAT-able. The HMRC distinction is between "passive" residential letting (exempt) and "active service provision" (potentially taxable). Most standard HMOs sit firmly in the passive-letting bucket.

If your business as a whole has significant taxable supplies (e.g. you also run a trading business through the same entity), you may register for VAT and reclaim input VAT on costs allocated to the taxable activities. But the HMO rental itself remains exempt.

HMO via Ltd company or personal name?

HMOs are subject to Section 24 just like standard BTL — mortgage interest deductibility is restricted to the 20% basic-rate credit for personal-name owners. So the structural question is similar to standard BTL: Ltd company SPV often wins for higher-rate-taxpayer landlords.

HMO-specific considerations:

For most higher-rate-taxpayer HMO landlords with 2+ properties, an SPV is the right vehicle. GoLandlord matches you with a specialist HMO accountant who handles the structure decision properly.