April 2026 Rules and Why Section 162 Relief Is No Longer Automatic

Section 162 of the Taxation of Chargeable Gains Act 1992 lets a landlord transfer a property business into a limited company without paying capital gains tax up front. The gain is not forgiven: it is rolled into the base cost of the shares the landlord receives in exchange, so it falls away only when those shares are eventually sold or passed on. For years, landlords incorporating a buy-to-let portfolio treated this deferral as a near-automatic feature of moving into a company structure. That assumption is now the most dangerous part of the whole exercise. This piece sits under the pillar guide on the new 2026 Section 162 claims process, and it pairs with the companion pieces on documenting your property business as a genuine activity and the cost of a failed or missing claim.

The change that matters from April 2026 is not a change to the statute. Section 162 reads as it always has. What has shifted is HMRC practice: the expectation that the underlying "business" test is evidenced when the claim is made, rather than asserted and then defended only if challenged. A passive single-property landlord who hands everything to a letting agent can no longer assume the relief will simply apply because they ticked the right boxes on incorporation.

How Section 162 relief actually works

Section 162 applies automatically, by operation of law, when its conditions are met. There is no claim form to lodge to switch it on, which is precisely why landlords came to think of it as automatic. The mechanism is a deferral, not an exemption. The chargeable gain that would otherwise arise on transferring the properties to the company is reduced by, and rolled into, the base cost of the shares issued in return. If a portfolio with a £600,000 latent gain is incorporated cleanly, the landlord receives shares whose base cost is reduced by that £600,000, so a future disposal of the shares carries the deferred gain forward.

The relief is partial where part of the consideration is taken in something other than shares. If the landlord takes some cash, or leaves a loan account in the company, only the proportion of the gain attributable to the share consideration is deferred. The rest crystallises immediately. This is why the structure of the consideration matters as much as the eligibility for relief itself.

The three statutory conditions

Three conditions must all be satisfied for Section 162 to operate. They look mechanical, but the first one carries the entire weight of the 2026 scrutiny.

1. 1A business is transferred. The activity given to the company must amount to a business, not the mere holding of investments. This is the contested condition.
2. 2The business is transferred as a going concern. The company takes on the live, operating property business rather than a stripped collection of assets.
3. 3All the assets of the business, other than cash, are transferred. Cash may be retained, but the properties, leases, and associated business assets must all pass to the company in exchange wholly or partly for shares.

The going-concern and all-assets conditions are usually straightforward to meet with careful drafting. The first condition, that what is transferred is a business at all, is where claims now succeed or fail.

Business versus passive investment

The dividing line is between an active property business and the passive holding of property as an investment. Owning a single flat, collecting the rent through an agent, and doing nothing else looks like investment. Running a portfolio with day-to-day involvement, repairs, tenant management, viewings, lettings decisions, and financial oversight looks like a business. The statute does not define the boundary, so the question is answered on the facts of each case by reference to case law.

The practical risk is that many landlords sit in the grey middle. A four-property Harrow portfolio managed partly in-house and partly through an agent is neither obviously passive nor obviously a full-time business. It is exactly this cohort that the 2026 evidence expectation targets.

Why "automatic" became a trap

Because Section 162 has no on-switch, landlords and some advisers reasoned that meeting the conditions on paper was enough. The trap is that the first condition is a question of fact, not of paperwork. A landlord can structure the consideration perfectly and still fail because the underlying activity was never a business. The automatic operation of the relief presupposes the conditions are met; it does nothing to lower the bar for the business test itself.

The Ramsay activity test

The leading authority is the case of Ramsay v HMRC, which concerned whether a landlord's property activity amounted to a business for incorporation-relief purposes. The Upper Tribunal accepted that the activities undertaken, taken together, were sufficient in nature and extent to constitute a business. The decision is fact-specific: it does not set a numeric threshold, and HMRC has not adopted one in legislation.

A figure of roughly 20 hours a week of personal involvement is widely cited as a working guide drawn from the facts in Ramsay. It is a guide, not a statutory rule and not a safe harbour. Spending 20 hours a week does not guarantee the relief, and spending fewer does not automatically deny it. What the tribunal looked at was the overall degree of activity: the range of tasks, their regularity, and the seriousness with which the portfolio was run as an enterprise.

What actually changed in April 2026

The April 2026 shift is procedural and evidential. HMRC now expects landlords to demonstrate the active-business substance at the point of claim, through contemporaneous documentation, rather than relying on the relief operating automatically and only producing evidence if and when the claim is questioned. The forward-looking design matters: claims already processed before 6 April 2026 are not reopened retrospectively, but new claims face the up-front evidence expectation.

Which landlords are most exposed

The landlords most exposed are those with small, fully managed portfolios who incorporate primarily for tax reasons, most often to escape the Section 24 mortgage-interest restriction. A single-property landlord whose only involvement is approving the agent's annual statement has very little to point to when asked to evidence a business. A landlord running serviced accommodation, by contrast, undertakes far more frequent and varied activity, and tends to meet the business test more readily.

• Single-property landlords fully outsourced to an agent: highest risk of failing the business test.
• Two to four property landlords with mixed in-house and agent management: the contested middle ground.
• Larger portfolios run with regular personal involvement: usually able to evidence a business.
• Serviced accommodation operators: typically meet the activity threshold more comfortably.

Section 162 does not solve Stamp Duty Land Tax

A critical point that the focus on CGT often obscures: Section 162 relieves the capital gains tax charge only. It does nothing for Stamp Duty Land Tax. Transferring property to a company is a chargeable transaction for SDLT, and because the company is acquiring a dwelling, the 5 percent additional-dwelling surcharge usually applies on top of the standard residential rates. For a portfolio of any size this is a substantial up-front cash cost that the CGT deferral does not touch. The one common route around it is incorporating a genuine property partnership, where Schedule 15 of the Finance Act 2003 can provide SDLT relief; absent a partnership, SDLT is payable in full.

The partnership route changes the SDLT picture

Where the properties are genuinely run as a partnership rather than by an individual or as co-owned investments, incorporating that partnership can attract SDLT relief under Schedule 15 of the Finance Act 2003. The relief is not available simply because spouses jointly own property; it requires a real partnership carrying on a property business, with the usual hallmarks of partnership: a partnership agreement, shared decision-making, joint accounts, and a business operated in common with a view to profit. HMRC scrutinises whether a partnership genuinely exists, and a partnership created on paper shortly before incorporation to capture SDLT relief is vulnerable to challenge. The business-substance question therefore runs through both the CGT and the SDLT analysis at once.

Should I still incorporate at all?

Incorporation can still be the right move, but it should never be driven by the CGT deferral alone. The decision turns on the long-term income tax position, the Section 24 interest restriction, the recurring cost of running a company, the SDLT bill on transfer, and the strength of the business-test evidence. A landlord who incorporates expecting automatic Section 162 relief, fails the business test, and is then hit with both immediate CGT and full SDLT has made the worst possible version of the trade. Modelling the whole position with a property accountant before any transfer is the only sensible approach.

The next step in the cluster

If the business test is now the deciding factor, the practical question is how to evidence it. The companion piece on documenting your property business for HMRC sets out what substance looks like in records, and the piece on the cost of a failed claim walks the consequences and the 60-day reporting clock if the deferral is not available.