Almost every landlord weighing up a company structure runs into the same question. If I move my properties into a limited company, do I trigger a capital gains tax bill on the way in, or can Section 162 incorporation relief defer it? The honest answer for most buy-to-let investors is that the relief is available in principle but out of reach in practice, because HMRC treats ordinary letting as investment rather than a business. The landlords who do qualify are a specific group, and even they have a separate stamp duty problem that Section 162 does nothing to solve.

This guide sets out the business test HMRC actually applies, what the relief covers and what it pointedly does not, the CGT and SDLT consequences with worked figures, and the routes that genuinely work. It assumes the current law: Section 24 fully in force, the furnished holiday lettings regime abolished, residential CGT at 18% and 24%, and the separate property income tax rates that take effect from April 2027.

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What is Section 162 incorporation relief?

Section 162 of the Taxation of Chargeable Gains Act 1992 defers the capital gains tax that would otherwise arise when an individual transfers a business as a going concern to a company in exchange for shares. Instead of paying CGT on the gain at the point of transfer, the gain is rolled into the base cost of the shares you receive. You pay nothing now; the deferred gain comes back into charge when you eventually sell or wind up the company.

Three conditions must all be met:

  • A business is transferred, not merely a collection of assets. This is the condition most landlords fail.
  • The business is transferred as a going concern, with all of its assets other than cash.
  • The consideration is wholly or partly in shares issued by the company. If part of the consideration is cash or a loan left outstanding on a director's loan account, the relief is restricted in proportion to the share element.

Two procedural points matter from 2026. For transfers on or after 6 April 2026, the relief must be claimed (it is no longer automatic) on or before the first anniversary of the 31 January following the tax year of transfer, roughly 22 months after the tax year ends. Finance Act 2026 also repealed section 162A, the old election to disapply the relief, so the position is now simply claim or no relief. We have verified both points against the current text on legislation.gov.uk.

Why most buy-to-let landlords do not qualify

The relief turns on a single word: business. HMRC's long-standing position is that holding property and letting it is an investment activity, not a business, and a passive investment is not eligible for Section 162 however large the portfolio. The distinction is about what you do, not how many properties you own.

The leading authority is Elizabeth Moyne Ramsay v HMRC [2013] UKUT 226 (TCC). Mrs Ramsay owned a property of ten flats and spent around 20 hours a week managing it directly: arranging maintenance, dealing with tenants, organising insurance, post and communal areas. The Upper Tribunal held this was a business for Section 162 purposes. The test it applied was the degree of activity, judged by the same factors used across tax law: whether the activity is a serious undertaking earnestly pursued, with reasonable continuity, on sound business principles, and with a substantial amount of owner time and involvement.

Ramsay is frequently misread as authority that any portfolio qualifies. It is not. The decision turned on the level of hands-on work, not the number of units. A landlord with a larger portfolio on full management through a letting agent, who spends little personal time on it, looks more like an investor than Mrs Ramsay did, despite owning more.

The factors HMRC weighs

There is no statutory checklist, but the following recur in HMRC enquiries and tribunal decisions:

  • Owner time and involvement. Hours actually worked on the portfolio, and whether the owner manages directly or delegates almost everything to an agent.
  • Scale and organisation. Number of properties, whether the activity is run on a structured, systematic basis with proper records and decision-making.
  • Services to tenants. Anything beyond the bare landlord obligations, such as active management of communal facilities, points towards a business.
  • Continuity and seriousness. A genuine, ongoing commercial operation rather than a passive holding awaiting capital growth.

The practical reality is that a small number of properties on hands-off management almost never clears the bar, and even sizeable portfolios fail where the owner is essentially a passive investor. Where a landlord does run a genuine business, the contemporaneous evidence (time logs, management records, the absence of full agency delegation) is what wins an enquiry. Build that evidence before you incorporate, not after HMRC asks.

Investment versus business: the decision at a glance

FactorPoints to investment (no relief)Points to business (relief possible)
Owner timeA few hours, mostly delegated to an agentSubstantial regular hours, hands-on
ManagementFull letting-agent managementOwner-managed, direct tenant dealings
Activity levelCollect rent, occasional repairsActive, organised, continuous operation
Records and structureMinimal, informalProper business records and systems
Tribunal read-acrossPassive holding for capital growthRamsay-style serious undertaking

If your honest answer to most rows is the left column, plan on the basis that Section 162 will not be available and that incorporation means paying CGT on the way in. If you sit in the right column, build the evidence and take advice before you act, because the relief is valuable enough to be worth getting right.

What Section 162 does not cover: the SDLT trap

This is the point that catches landlords out most often. Section 162 is a capital gains tax relief and nothing else. Transferring property from your own name into a company is a separate transaction for stamp duty land tax, and the company is the buyer. Because a company purchasing residential property is almost always within the additional-dwellings rules, the transfer normally attracts the 5% additional-dwellings surcharge on top of standard SDLT rates on the market value of what is transferred. There is no general relief that switches this off.

The figures matter because SDLT is charged on the full market value of the portfolio, not the gain. A portfolio worth several hundred thousand pounds can carry a substantial SDLT charge on incorporation even where CGT is fully deferred by Section 162. Note also that multiple dwellings relief was abolished, so do not assume it can soften a portfolio transfer.

The connected-partnership route that does work

There is one reliable SDLT route, and it is narrow. FA 2003 Schedule 15 reduces the chargeable consideration on transferring property out of a partnership to a connected company using the sum-of-lower-proportions calculation. Where the partners are all connected (for example a genuine husband-and-wife or family partnership), the chargeable consideration can fall to nil, giving a zero-SDLT incorporation. The conditions are strict:

  • There must be a genuine, pre-existing partnership with real substance: partnership tax returns filed on form SA800, partnership accounting records, and joint borrowing where the properties are mortgaged.
  • A partnership created shortly before incorporation purely to access the relief is attacked under the s.75A anti-avoidance rule and ignored for SDLT.
  • The working safe harbour is around two years of genuine partnership operation before the transfer.

This is not a retrofit fix for a couple holding property jointly without ever having run a real partnership. It is a route for landlords who already operate as a genuine partnership, and it needs careful structuring. Our guide to the buy-to-let limited company sets out the wider company structure picture.

Scotland and Wales: different transfer taxes

The additional-dwellings surcharge above is the England and Northern Ireland position under SDLT. The devolved equivalents have their own rates:

JurisdictionTransfer taxAdditional-dwellings charge
England and Northern IrelandSDLT5% surcharge on top of standard rates
ScotlandLand and Buildings Transaction Tax (LBTT)Additional Dwelling Supplement (ADS) at 8%
WalesLand Transaction Tax (LTT)Higher rates for additional properties

If your portfolio straddles jurisdictions, each property is taxed under the regime where it sits. Use the correct authority for each: Revenue Scotland for LBTT and ADS, the Welsh Revenue Authority for LTT.

The CGT cost when relief does not apply

Where the activity is investment and Section 162 cannot be claimed, transferring to your own company is a disposal at market value between connected persons. The gain is the market value at transfer minus the base cost of each property. For residential property the CGT rates are 18% on any part of the gain within your remaining basic-rate band and 24% above it, after the £3,000 annual exempt amount. The tax is payable, and a CGT-on-UK-property return filed, within 60 days of completion.

Worked example: incorporating without relief

Take a higher-rate landlord moving three properties into a company, where the activity is passive investment so no Section 162 relief is available:

PropertyBase costMarket value at transferGain
Flat A£150,000£250,000£100,000
Flat B£180,000£280,000£100,000
House C£200,000£320,000£120,000
Total£530,000£850,000£320,000

After the £3,000 annual exempt amount, the chargeable gain is £317,000. A higher-rate landlord pays CGT at 24%, giving £76,080. That tax falls due within 60 days even though no cash changes hands on the transfer, so it must be funded separately. On top of this sits the SDLT (or LBTT/ADS, or LTT) on the £850,000 market value, which the company pays. The combined upfront cost is exactly why incorporation has to be modelled over several years, not decided on a hunch.

How relief changes the picture

For the landlord who genuinely qualifies, the contrast is stark. If the same £320,000 gain belonged to a qualifying business transferred wholly for shares, Section 162 would defer the entire gain into the base cost of the shares. No CGT now. If the landlord later sold those shares for £900,000, the deferred gain would come back into charge then, against a reduced share base cost. The relief buys the corporate structure today without the immediate CGT hit, but it never makes the gain disappear.

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Section 165 holdover relief and why it rarely helps landlords

Holdover relief under section 165 is a different mechanism that landlords often confuse with Section 162. It applies to gifts of business assets and defers the gain by reducing the recipient's base cost rather than the donor's shares. The problem for landlords is the same business hurdle in a different form: s.165 generally requires the asset to be used in a trade or qualifying business, and an ordinary investment letting is neither. So for the typical passive portfolio, s.165 does not rescue the position any more than s.162 does. Spousal transfers, by contrast, pass at no gain and no loss under s.58 TCGA 1992, which can be useful in pre-incorporation planning but does not itself solve the company-transfer charge.

Why landlords incorporate anyway: Section 24

The driver behind most incorporation enquiries is Section 24, which is fully in force. An individual landlord can no longer deduct mortgage interest as an expense; relief is given as a 20% basic-rate tax credit instead. For a higher or additional-rate landlord with significant borrowing, interest is effectively relieved at only 20% against tax charged at 40% or 45%, leaving a finance-cost wedge that can turn a real-terms profit into a tax loss.

Worked example: the Section 24 wedge

A higher-rate landlord with £40,000 rental income, £18,000 mortgage interest and £4,000 other costs:

ItemIndividual (Section 24)Company
Rental income£40,000£40,000
Other costs deducted£4,000£4,000
Mortgage interest deducted£0 (credit instead)£18,000
Taxable profit£36,000£18,000
Tax before credit£14,400 (40%)£3,420 (19%)
Section 24 credit (20% of £18,000)£3,600n/a
Tax£10,800£3,420

The company is taxed on profit after the interest is fully deducted; the individual is not. That gap is the engine behind incorporation interest. But the company tax above is only the first layer. Extracting the profit as salary or dividends adds further personal tax, and getting the property into the company triggered the CGT and SDLT covered earlier. Read alongside our detailed guide to claiming mortgage interest relief under Section 24, the point is that the headline corporation tax saving is real but partial.

April 2027: the rate gap widens for individuals

From 6 April 2027, property income in England, Wales and Northern Ireland is taxed at separate rates of 22% basic, 42% higher and 47% additional, enacted by Finance Act 2026 and now in force. Only Scotland is carved out for 2027/28, where Holyrood-set rates apply. The Section 24 finance-cost reducer rises in step to 22%, so a basic-rate landlord sees no new wedge open, the reducer matches the rate. A higher-rate landlord, however, still relieves interest at only 22% against a 42% charge, a 20-point gap that is unchanged in size but sits on top of higher headline rates.

For companies, none of this applies: corporation tax rates are unchanged and interest remains fully deductible. So the comparative case for incorporation strengthens for geared higher and additional-rate landlords as the individual rates rise. See our standalone analysis of the 2027 property income tax rates for landlords for the full mechanics.

Making Tax Digital and the compliance dimension

Making Tax Digital for Income Tax is live and phasing in by income level:

FromApplies to qualifying income over
6 April 2026£50,000
6 April 2027£30,000
6 April 2028£20,000

For unincorporated landlords this means quarterly digital updates through compatible software. A limited company reports through corporation tax returns and Companies House instead, so incorporating moves you into a different compliance world rather than removing the obligation. Our guide to the Making Tax Digital deadline for landlords sets out what unincorporated owners need in place. MTD is a factor in the structure decision but rarely the deciding one.

Bringing it together: is incorporation worth it?

The Section 162 question is really two questions wearing one coat. First, does my activity qualify as a business so that the CGT on the way in can be deferred? For most ordinary buy-to-let the answer is no, and the relief is irrelevant. Second, even if I pay CGT and SDLT to incorporate, do the ongoing tax savings justify it? That depends on your marginal rate, gearing, time horizon and how you intend to take profits out.

The landlords for whom incorporation tends to make sense are higher and additional-rate, significantly geared, intending to retain and reinvest profits rather than draw them, and holding for the long term so the upfront costs amortise. The landlords for whom it rarely makes sense are basic-rate, lightly geared, or planning to sell within a few years. Where you sit on that spectrum, not the availability of Section 162 alone, should drive the decision. A specialist property accountant can model the total cost over several years against your actual figures, and our wider property investment tax guide sets the structure choice in context.

Before you act, get the business-test evidence assessed honestly, model the CGT and SDLT cost on real valuations, and price in the profit-extraction tax at the other end. Incorporation done well is a deliberate multi-year strategy. Incorporation done on the assumption that Section 162 will quietly defer everything is how landlords end up with an unexpected SDLT bill and a CGT charge they had not planned to fund.