HMO Tax Implications UK 2025/26 | AccountingStack

A House in Multiple Occupation (HMO) is a property rented by three or more people from two or more separate households who share facilities. For tax purposes, HMOs are taxed in the same way as standard buy-to-let properties, but several specific rules and costs apply that affect the overall tax position.

Income tax treatment

Rental income from an HMO is taxed in the same way as any other rental income. The profits (income minus allowable expenses) are added to your other income and taxed at your marginal rate. Section 24 applies, so mortgage interest is not fully deductible for individual landlords.

HMO licensing costs

Large HMOs (five or more people in a property of three or more storeys) require a mandatory HMO licence under the Housing Act 2004. Many local authorities have introduced additional or selective licensing schemes covering smaller HMOs too. Licensing fees, typically £500 to £2,000 depending on the authority, are allowable revenue expenses deductible from rental income.

Capital Allowances for HMOs

Unlike standard residential lettings, HMOs may qualify for Capital Allowances on items that are integral to the building rather than furniture (which is covered by the Replacement of Domestic Items Relief). Specifically:

• Electrical systems, heating systems, and plumbing may qualify as "integral features" under the Capital Allowances rules
• This can result in significant upfront tax deductions when renovating or converting a property into an HMO

Whether a particular HMO qualifies depends on whether the property is genuinely a business activity, and specialist advice is needed to assess this correctly.

VAT and HMOs

Residential lettings, including HMOs, are generally exempt from VAT. This means you do not charge VAT on rent and cannot recover input VAT on your costs. If you also provide services alongside accommodation (meals, cleaning, linen), the arrangement may begin to resemble a hotel or boarding house, which is a different VAT treatment. The line is not always clear and specialist advice is recommended for HMOs with significant added services.

Stamp Duty Land Tax

When purchasing an HMO, the 5% additional dwellings SDLT surcharge applies if you already own another residential property. See our SDLT surcharge guide for full details.

Planning and structural costs

Converting a property into an HMO typically requires planning permission and may involve significant structural works. Costs that are improvements (rather than repairs to an existing structure) are capital expenditure. These cannot be claimed as revenue expenses but will reduce the CGT gain when you eventually sell.