Property incorporation tax

"Property incorporation tax" is the informal term landlords use to describe the combined tax costs and reliefs that arise when a personally held rental property business is transferred into a limited company in exchange for shares. It is not a statutory phrase, the relevant legislation refers to capital gains tax (CGT), stamp duty land tax (SDLT), and Incorporation Relief under Section 162 of the Taxation of Chargeable Gains Act 1992. The decision is typically driven by the Section 24 mortgage interest restriction introduced by the Finance (No. 2) Act 2015, which limits the income tax relief individual landlords can claim on mortgage interest costs, a restriction that does not apply to limited companies.

Capital gains tax on incorporation

Transferring properties to a company is treated as a disposal at market value for CGT purposes. A taxable gain arises based on the difference between the market value at the point of transfer and the original acquisition cost (plus allowable improvement costs), regardless of whether cash changes hands. CGT rates on residential property are 18% for basic-rate taxpayers and 24% for higher-rate taxpayers on gains above the annual exempt amount.

Section 162 of the Taxation of Chargeable Gains Act 1992 provides Incorporation Relief, which defers this gain by rolling it into the base cost of the shares received in return for the business. The gain is not extinguished but is brought back into charge when the shares are eventually sold. Three conditions must all be satisfied for the relief to apply: the business must be transferred as a going concern; all business assets (other than cash) must be transferred to the company; and the consideration for the transfer must be wholly or partly in shares in the company.

Important change from 6 April 2026: Prior to 6 April 2026, Incorporation Relief applied automatically when the conditions were met. From 6 April 2026, following a measure announced in the Autumn Budget 2025, landlords must actively claim the relief on their tax return and provide supporting evidence. A missed claim or failure to meet the evidence requirements will result in the gain becoming immediately chargeable. Where a landlord prefers to pay CGT upfront, for example to utilise Business Asset Disposal Relief or to create a Director's Loan Account, they may elect under Section 162A for the relief not to apply.

The most contested aspect of Section 162 eligibility for rental portfolios is whether the property activity constitutes a "business" rather than mere passive investment. HMRC does not publish specific thresholds, but factors including management hours, the scale of activity, and whether the landlord is actively involved in day-to-day running all inform the assessment. HMRC's Non-Statutory Clearance service is available before proceeding and is advisable for any material transaction.

SDLT on incorporation

SDLT is an entirely separate consideration and is not addressed by Section 162 relief. The transfer of property to a connected company is treated as a sale at market value for SDLT purposes. SDLT (including the 5% additional dwelling surcharge for companies) is payable by the acquiring company. On a portfolio worth £800,000, SDLT can easily exceed £50,000, a significant upfront cost that must be weighed against the long-term tax efficiency of the company structure.

One potential SDLT relief exists under Schedule 15 of the Finance Act 2003, which applies to transfers from a partnership to a company where the partners and the company's shareholders are the same individuals. This route is technically demanding, heavily scrutinised by HMRC, and carries scheme disclosure risks if structured aggressively. It should not be pursued without specialist advice.

The Renters' Rights Act 2025 and the incorporation decision

Incorporation does not change a landlord's day-to-day duties to tenants. The company, as the new landlord, must comply with the same obligations, including tenancy agreements, fitness for habitation standards, deposit protection, and the possession framework under the Renters' Rights Act 2025. From 1 May 2026, all private tenancies in England are assured periodic tenancies; the company must use Section 8 and statutory grounds for possession in the same way as an individual landlord.

What incorporation can change is the landlord's time horizon and strategic flexibility. The longer average possession timeline post-RRA, and the expectation of extended tenancy relationships, may make a company structure more appropriate for landlords building for the long term.

Once operating through a company, Making Tax Digital obligations apply, August's MTD-compliant record-keeping tools support digital income and expense tracking across a company's portfolio.

For a full analysis of whether a limited company structure makes financial sense, covering the Section 24 driver, mortgage product availability, ongoing compliance costs, and when incorporation is and is not appropriate, see the August guide to forming a limited company as a UK landlord.

Frequently asked questions

Does Incorporation Relief under Section 162 apply automatically?

Prior to 6 April 2026, yes, the relief applied automatically where the three conditions were met. From 6 April 2026, following an Autumn Budget 2025 measure, the relief must be actively claimed on the self-assessment tax return with supporting evidence. Failing to claim will result in the gain being immediately taxable in the year of transfer.

What are the three conditions for Section 162 Incorporation Relief?

All three must be met: the business must be transferred as a going concern; all business assets other than cash must be transferred to the company; and the consideration received must be wholly or partly in shares in the company. If any condition fails, the relief is not available and CGT is payable in full.

Is there SDLT relief when incorporating a property portfolio?

There is no automatic SDLT relief for most incorporations. A potential relief under Schedule 15 of the Finance Act 2003 applies to transfers from a qualifying partnership to a company, but the conditions are technically demanding, the route is heavily scrutinised by HMRC, and specialist advice is essential. In most straightforward incorporations, full SDLT at market value applies, including the 5% additional dwelling surcharge.

Can I incorporate a single buy-to-let property?

Incorporating a single property is extremely unlikely to qualify as a "business" for Section 162 purposes. HMRC's view is that passive holding of investment property does not constitute a business, it requires active management and operational involvement. The more properties in a portfolio and the more active the management, the stronger the business case. A single property landlord would typically not satisfy the going-concern business test.