HMO landlords are the property-tax constituency most sharply affected by Section 24. The mortgage-interest restriction at ITTOIA 2005 s.272A bites harder for HMO portfolios than standard BTL because HMO specialist-lender mortgage rates are higher, so the absolute amount of interest restricted (and the resulting personal-tax cost) is larger. Naturally the incorporation question becomes live for HMO operators earlier than for single-let BTL operators.

This page is the honest decision-helper layer. We weigh six structural pros against ten cost-side cons, surface the post-MDR-abolition SDLT change (F(No.2)A 2024 s.7 effective 1 June 2024) explicitly, work through six examples that include both pro-incorporation and pro-personal outcomes, and frame the decision band by portfolio size, LTV, rate band, and time horizon. Incorporation is the right answer for some HMO landlords and the wrong answer for others; the framework matters more than the conclusion.

Why the question arises for HMO landlords specifically

The Section 24 mortgage-interest restriction at ITTOIA 2005 s.272A (introduced by F(No.2)A 2015, phased in April 2017 to April 2020) replaced full mortgage-interest deduction for individual landlords with a 20% basic-rate tax credit. Three reasons the restriction hits HMO landlords harder than standard BTL:

  • Higher mortgage rates. HMO mortgages sit in the specialist-lender market with rate premiums of 50 to 150 bps over standard BTL. A geared HMO portfolio carries more interest per pound of capital than the equivalent BTL portfolio.
  • Higher gearing. HMO economics often support higher LTVs (yield supports debt service) and many HMO landlords scale by reinvesting equity into more leverage. Larger absolute interest bills, larger absolute s.272A restriction.
  • Higher operating cost. HMO operations carry compliance overhead (Housing Act 2004 licensing, fire safety, communal-area maintenance, often inclusive bills) that consumes margin. The net rental margin is then taxed at the unrestricted gross-revenue level for s.272A purposes, sharpening the effective tax rate.

For a higher-rate individual HMO landlord with 50% LTV on a small portfolio, effective marginal tax on net rental income can reach 50% to 60% under s.272A. Limited companies are not within s.272A; they deduct interest in full under CTA 2009 Part 5 loan relationships. The arithmetic motivates the incorporation question. The arithmetic does not, by itself, determine the answer.

The six structural pros of HMO incorporation

1. Section 24 unrestricted

Limited companies deduct interest in full under CTA 2009 Part 5 (loan relationships). For a £30,000-per-year interest bill, a higher-rate individual loses around £6,000 per year to the s.272A restriction (the difference between 40% deduction and the 20% basic-rate credit). A LtdCo retains the £6,000 saving. Over a 5 to 10 year holding period this compounds.

2. Lower corporation tax rate

The CT rate stack from FA 2021 onwards:

  • 19% small profits rate (profits up to £50,000 per associated-company group).
  • 26.5% effective marginal-relief rate in the band £50,000 to £250,000 (per CTA 2010 ss.18A to 18J).
  • 25% main rate (profits above £250,000).

For a typical landlord-scale HMO LtdCo with profits in the small-profits band, the 19% rate compares favourably against 40% HRT or 45% ART. Be careful of associated-company gating (multiple SPVs in the same group share the £50,000 small-profits band); see our companion marginal-relief and group-relief pages for the multi-company architecture.

3. HMO-specific capital allowance upside

HMOs carry substantially more plant and machinery than single-let BTLs. CAA 2001 Part 2 plant-and-machinery allowances apply to plant installed in common parts:

  • Communal kitchens: cookers, fridges, microwaves, dishwashers, plumbing fittings.
  • Communal areas: lounge furnishings, lighting, flooring, window furnishings.
  • Mandatory fire-suppression and detection per Housing Act 2004 licensing: fire doors FD30s, fire alarms, emergency lighting, sprinklers in larger HMOs.
  • Integrated heating systems in common parts.

The residential-dwelling restriction at CAA 2001 ss.21 to 23 and List C does NOT exclude common-area plant where the property is HMO-licensed. A typical 4-HMO portfolio can carry £60,000 to £100,000 of qualifying plant. For LtdCo HMO owners these allowances offset CT-rated profits at 19% to 26.5%; for individual owners post-Section 24 the allowances offset taxable rental income but the s.272A interest restriction still bites alongside.

4. Reinvestment retention at CT rate

Where the operator's intent is to reinvest rental profits into more property rather than extracting personally, the LtdCo retains profits at 19% to 25% CT. The same profits drawn personally would be taxed at 40% HRT or 45% ART. The retention math is the strongest single argument for incorporation where reinvestment is the operating intent.

5. Asset protection via per-property SPVs

Each HMO can sit in its own SPV (single-purpose vehicle), ring-fencing the property from creditors of the wider portfolio. Tenant claims, lender claims, and contract claims against one SPV do not crystallise against the rest of the portfolio. For HMO operations with high tenant-interaction (and the corresponding claim profile), the structural protection is meaningful.

6. Succession planning via share transfer

Limited company shares are easier to transfer between generations than direct property. Lifetime gifts of shares (potentially exempt transfers under the IHT 7-year rule), Family Investment Company architecture (growth-share + share-class for value-freeze IHT planning), and pension contributions are all routes that work cleanly through a LtdCo wrapper. For HMO operators with succession horizons of 10 to 20 years, the wrapper is materially more efficient than direct property ownership for inter-generational transfer.

The ten cost-side cons of HMO incorporation

1. SDLT on transfer (materially worsened post-MDR-abolition)

Transferring an HMO portfolio to a LtdCo crystallises SDLT at the residential rate stack with the 3% HRAD surcharge for company purchasers under FA 2003 Sch 4ZA. F(No.2)A 2024 s.7 abolished Multiple Dwellings Relief from 1 June 2024. Pre-abolition: multi-property bundles enjoyed MDR with SDLT computed on the average value across the bundle. Post-abolition: each dwelling is taxed separately at full rate stack.

Practical effect on a £600,000 4-HMO bundle (4 properties at £150,000 average):

  • Pre-1-Jun-2024 (with MDR): around £18,000 total SDLT.
  • Post-1-Jun-2024 (no MDR): around £43,000 total SDLT, approximately 2.4× cost.

The only mitigation route now is the FA 2003 Sch 15 partnership-incorporation relief where partnership status genuinely exists (not bare co-ownership).

2. CGT on transfer (unless s.162 relief applies)

Transfer of properties to a LtdCo is a market-value disposal for CGT under TCGA 1992 s.17 (connected-party deeming). Without relief, gain on each property crystallises at the date of transfer. TCGA 1992 s.162 incorporation relief defers the gain by rolling it into the share base, but requires a "business" to be transferred as a going concern. HMO operations typically clear the Ramsay v HMRC [2013] UKUT 226 business test, but the analysis is fact-intensive and worth confirming via a pre-transaction clearance application where the portfolio profile is borderline.

3. Double-layer tax on extraction

Profits taxed at CT inside the LtdCo, then taxed again at dividend rate on extraction. The dividend rate stack from 6 April 2026 per FA 2026:

  • £500 dividend allowance.
  • 10.75% ordinary (basic-rate) dividend rate.
  • 35.75% upper (higher-rate) dividend rate.
  • 39.35% additional rate.

For a higher-rate individual extracting all profits: 25% CT plus 35.75% dividend tax on 75% of distributable profit = 25% + (0.75 × 35.75%) = 51.8% effective combined rate. Direct individual ownership of the same income (40% HRT plus 20% basic-rate credit on interest) typically gives 45% to 55% effective rate on a leveraged HMO. The combined LtdCo route is NOT automatically cheaper for extraction-intent operators; it is cheaper for retention-intent operators where most of the profit stays inside the company at CT rate.

4. Narrower HMO LtdCo mortgage market + rate premium

HMO LtdCo mortgage products are narrower than personal HMO products. Typical rate premium 50 to 75 bps; the specialist-lender market is narrower still for LtdCo HMO with 5-plus bedroom configurations. For a £30,000-per-year interest portfolio, a 50 bps premium is around £1,500 additional interest per year, eroding part of the tax saving.

5. ATED admin (even where relieved)

FA 2013 ss.94 to 174 imposes ATED on companies holding a single dwelling above £500,000. HMOs are typically taxed as single dwellings for ATED unless the property is structurally a multiple-dwelling block. ATED chargeable amounts apply unless the company qualifies for the property-rental-business relief at FA 2013 ss.133 to 141 (commercially-let HMOs typically do). Even where relief applies, an annual ATED return must be filed: non-trivial admin burden for portfolios with one or more above-£500k HMOs.

6. HMO licence transfer (Housing Act 2004 Part 2)

The HMO licence is held by the landlord; on transfer to a LtdCo, the LtdCo must apply for a new licence in its own name (or seek transfer of existing; local authority practice varies). Cost: licence fees £500 to £1,500 per HMO per 5-year cycle plus administrative time. Risk during transfer: running an unlicensed HMO is an offence under Housing Act 2004 s.72 with rent-repayment-order exposure under Housing and Planning Act 2016 ss.40 to 45 (tenant can recover up to 12 months' rent). Operational discipline required to time the licence transfer with the SDLT, lender, and accounting steps.

7. Annual filing overhead

LtdCo administration requires: CT600 return; statutory accounts under FRS 102 or FRS 105; confirmation statement; PSC register maintenance; identity verification under ECCTA 2023 Part 1 (operative from 2025-26 in phases). Typical annual compliance cost £2,000 to £5,000 in adviser fees plus internal time. The recurring cost is part of the long-term decision math.

8. Loss of CGT annual exempt amount inside LtdCo

Individual disposal of a property uses the personal CGT annual exempt amount (currently £3,000 from 6 April 2024). Corporate disposals do not benefit from the AEA; corporate gains are taxed at the full CT rate. For HMO operators planning future disposals, the loss of the AEA per disposal is a long-term cost.

9. Loss of Private Residence Relief and lettings relief on disposal

Where any of the HMO properties were ever the operator's main residence, PRR under TCGA 1992 ss.222 to 226 and the residual lettings relief at s.223B can shelter substantial gain on personal disposal. Transfer to a LtdCo crystallises the gain (subject to s.162 if applicable) and the corporate then holds the property without access to PRR. Where a personal owner-occupancy history exists, the LtdCo route can be materially more expensive on the substantive CGT.

Existing personal HMO mortgages typically cannot be transferred to a LtdCo; the LtdCo refinances at incorporation. Refinancing cost: lender arrangement fees (1% to 2% of loan), valuation fees (£500 to £2,000 per property), legal fees (£1,000 to £3,000 per property), broker fees. For a £400,000 portfolio loan stack, refinancing cost around £8,000 to £15,000 total. Plus the rate-premium impact noted above.

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Worked examples

Example 1: 4-HMO portfolio incorporation (the typical decision case)

Mrs Patel owns 4 HMOs personally. Gross rental £60,000 per year; mortgage interest £30,000 per year (50% LTV); operating costs £18,000 per year (compliance, repairs, fire-safety, utilities). Mrs Patel is a higher-rate individual.

Personal ownership math (current):

  • Taxable income = £60,000 − £18,000 = £42,000.
  • Tax at 40% = £16,800.
  • Less 20% basic-rate credit on £30,000 interest = £6,000.
  • Effective annual tax = £10,800.

LtdCo math (post-incorporation, retention scenario):

  • Taxable profit = £60,000 − £18,000 − £30,000 (full interest deduction per CTA 2009 Part 5) = £12,000.
  • CT at 19% small profits = £2,280.
  • Retention benefit: £9,720 more cash retained at LtdCo level per year vs personal ownership (£10,800 − £2,280, with the operator drawing nothing personally).

LtdCo math (post-incorporation, full extraction scenario):

  • £12,000 profit minus £2,280 CT = £9,720 distributable.
  • Dividend tax on £9,220 (after £500 allowance) at 35.75% = £3,296.
  • Combined CT plus dividend = £5,576 per year.
  • Saving vs personal ownership = £5,224 per year.

One-off incorporation costs:

  • SDLT post-MDR-abolition on £600,000 portfolio: approximately £32,000 to £48,000 across the 4 properties.
  • CGT (if no s.162 relief): deferred via s.162 in most HMO cases.
  • Legal, valuation, lender refinancing, accounting setup: £5,000 to £15,000 total.

Payback period: £42,000 to £58,000 one-off cost divided by £5,224 annual saving = 8 to 11 years on full-extraction. On retention-intent the payback is faster (3 to 5 years) because the retention benefit is larger. The math favours incorporation where the operator has a long retention horizon and reinvests profits inside the company.

Example 2: Section 162 incorporation relief, HMO business-test depth

Continuing Example 1: Mrs Patel applies TCGA 1992 s.162 incorporation relief on transfer.

s.162(1) conditions: (a) business transferred as a going concern; (b) all assets (other than cash) transferred; (c) consideration consists wholly or partly of shares.

Business-versus-investment test (Ramsay): HMO operations carry materially more business-like activity than standard BTL: active tenant management (room-letting cycle, communal-area maintenance), licensing compliance (Housing Act 2004 Part 2), often inclusive bills and services (utilities, cleaning, broadband). Mrs Patel's 4-HMO portfolio with 16 to 20 tenants total plus active management comfortably exceeds the Ramsay 21-flat threshold-pattern. s.162 typically available.

Operational outcome: historic-cost CGT base £200,000 (purchase prices); market value at transfer £600,000. Indemnified gain £400,000. Under s.162, the gain is rolled into the share base (effective £200,000 base in NewCo shares). NO CGT crystallises at transfer. NewCo holds property at £600,000 MV in its accounts; £400,000 tax-free DLA credit balance is created by the value-differential, providing a tax-efficient extraction route in the early post-incorporation years (subject to the DLA exhaustion trap once the credit balance is exhausted).

Example 3: HMO-specific capital allowance upside

Mrs Kapoor's 4-HMO portfolio includes substantial plant and machinery in common parts:

  • Communal kitchens (cookers, fridges, microwaves, plumbing fittings): around £30,000.
  • Communal lounge / dining areas (furnishings, lighting, flooring): around £25,000.
  • Mandatory fire-suppression and detection per Housing Act 2004 licensing (fire doors FD30s, fire alarms, emergency lighting): around £15,000.
  • Integrated heating systems in common parts: around £10,000.
  • Total qualifying plant ≈ £80,000.

Personal ownership: capital allowances offset rental income but s.272A interest restriction still bites alongside. Effective marginal tax-saving on the allowance ≈ £80,000 × 40% (HRT on offset income) minus £80,000 × 20% (lost basic-rate credit interaction) ≈ £16,000 effective saving.

LtdCo ownership: capital allowances offset CT-rated profits; effective saving = £80,000 × 19% to 26.5% CT rate ≈ £15,000 to £21,000.

The HMO capital-allowance pool is materially larger than for single-let BTL because of the regulatory and operational factors (HMO licensing mandates the fire-safety plant; communal kitchens and areas have no analogue in single-let BTL). This is the structurally distinct HMO incorporation advantage that does not appear in the general BTL incorporation comparison.

Example 4: SDLT post-MDR-abolition, the cost-side change

Same 4-HMO portfolio; market value £600,000 (4 properties at £150,000 average).

Pre-1-June-2024 (with MDR): Multiple Dwellings Relief allowed treating the 4-property bundle as a single transaction with rate stack applied to the average value. £150,000 × 4 = £600,000 divided by 4 = £150,000 average. At residential rate stack plus 3% HRAD surcharge for company purchasers: approximately £18,000 total SDLT for the bundle.

Post-1-June-2024 (F(No.2)A 2024 s.7 abolition): each dwelling taxed separately at full residential rate stack with 3% HRAD. £150,000 per property at residential rates (5% on first £125,000 portion plus 3% surcharge on full £150,000) = £6,250 plus £4,500 = £10,750 per property × 4 = around £43,000 total SDLT for the bundle.

The MDR-abolition effect: materially worsens the cost-side of HMO incorporation by approximately 2.4× vs the pre-1-Jun-2024 framing. Mitigation via the Sch 15 partnership-incorporation route is available where partnership status genuinely exists (per PA 1890 s.1 four-tests gate); the partner-LtdCo proportions must match to access the sum-of-lower-proportions relief in full.

Example 5: When the math FAVOURS personal ownership

Mr Verma owns a single low-yield HMO. Gross rental £6,000; mortgage interest £1,500; operating costs £1,800; market value £180,000. He is a basic-rate taxpayer.

Personal ownership math: taxable income £6,000 − £1,800 = £4,200. Tax at 20% basic rate = £840. 20% basic-rate credit on £1,500 interest = £300. Effective tax £540 per year.

LtdCo math (full extraction): £6,000 − £1,800 − £1,500 = £2,700 profit. CT at 19% = £513. Dividend tax on £2,200 (after £500 allowance) at 10.75% = £237. Combined = £750 per year. More expensive than personal by £210 per year.

Plus one-off incorporation costs: SDLT around £10,750 (single property at £180,000, residential rate stack with 3% HRAD); setup around £5,000; refinancing around £2,000. Total around £17,750 one-off cost that never amortises (the structure is more expensive ongoing).

Operational conclusion: for a single low-yield HMO with a basic-rate owner, the LtdCo route loses. Incorporation is not universally beneficial; the decision framework matters.

Example 6: HMO licensing transfer operational gotcha

Mrs Kapoor decides to incorporate her 3-HMO portfolio. Each HMO holds a 5-year mandatory licence under Housing Act 2004 Part 2.

On transfer: the HMO licence is held by the landlord. On transfer to LtdCo, the LtdCo must apply for a new licence in its own name, or seek transfer of existing (local authority practice varies). Practical pattern: most local authorities require fresh application, new fees, and an administrative cycle of 4 to 12 weeks.

Cost: £500 to £1,500 per HMO × 3 = £1,500 to £4,500 in licence fees plus administrative time.

Risk during transfer: running an unlicensed HMO is an offence under Housing Act 2004 s.72 with rent-repayment-order exposure under Housing and Planning Act 2016 ss.40 to 45 (tenant can recover up to 12 months' rent). Operational discipline: time the licence transfer / re-application to overlap with the SDLT, lender, and accounting transfer. Do not leave a gap in licensed status.

Decision band: when does incorporation typically win?

The decision band depends on the interaction of five factors:

  • Portfolio size: larger HMO portfolios spread the one-off SDLT and setup cost over more income, shortening payback. Single HMO rarely justifies incorporation cost; 3-plus HMOs usually does.
  • Current LTV: higher LTV means larger absolute Section 24 impact, larger annual saving from full interest deductibility. 50%-plus LTV typically tips the math toward incorporation.
  • Rate band: higher-rate (40%) or additional-rate (45%) individuals see larger savings vs LtdCo CT rates than basic-rate (20%) individuals do.
  • Retention vs extraction intent: retention-intent operators (reinvesting profits into more property) capture the full LtdCo CT-rate saving. Extraction-intent operators (drawing dividends to fund lifestyle) lose much of the saving in double-layer tax.
  • Time horizon: longer holding periods amortise the one-off costs across more years of saving. Sub-5-year horizons rarely amortise SDLT + setup.

Rough decision band:

  • Favours incorporation: 3 or more HMOs, LTV at 50% or more, higher-rate or additional-rate individual, retention intent, time horizon of 7 years or more. Payback typically 5 to 10 years.
  • Favours personal ownership: single HMO, LTV below 30%, basic-rate individual, extraction intent, time horizon below 5 years.
  • Borderline (full analysis required): 2-HMO portfolios; mixed-rate-band individuals; mixed retention/extraction intent. The framework provides direction; only a fact-specific calculation gives the answer.

Where this page sits in the cluster

This page is the HMO-specific decision-helper layer. The companion pages cover the layers around it: