Moving a rental portfolio into a limited company is one of the most consequential decisions a landlord makes, and Capital Gains Tax is usually the thing that stops people in their tracks. Transfer properties at market value and, on paper, you have disposed of every one of them, potentially crystallising a large CGT bill before a single penny of benefit arrives. Incorporation relief is the mechanism that, in the right circumstances, lets you defer that charge. It is powerful, frequently misunderstood, and from 6 April 2026 it works differently from the way most online guides still describe.
This guide sets out who actually qualifies, how the relief works, the trap that catches landlords who think CGT is the only tax in play, and the change that means the relief must now be claimed rather than applied automatically.
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What is incorporation relief for landlords?
Incorporation relief sits in section 162 of the Taxation of Chargeable Gains Act 1992. When you transfer a business to a company in exchange for shares, the gain on the assets going in is not taxed at that point. Instead it is rolled into the base cost of the shares you receive. You have not escaped the tax, you have deferred it: the gain resurfaces when you sell the shares or wind the company up.
For a landlord, the relief turns an immediate market-value disposal of every property into a deferred liability sitting inside the share value. That can be the difference between a six-figure tax bill on day one and no CGT at all until you exit, years later, on your own timetable. The catch is that it only applies to a business, and it transfers the whole business in one go.
The business test: the hurdle most landlords trip on
Section 162 relieves the transfer of a business. It does not relieve the transfer of an investment. This single distinction decides most cases, and HMRC starts from the position that letting property is investment, not trade.
The leading authority is Ramsay v HMRC [2013] UKUT 226, where the taxpayer ran a single converted building of ten flats and spent around twenty hours a week on it, dealing with tenants, maintenance, cleaning of common areas, and security. The Upper Tribunal held that the activity, taken in the round, amounted to a business for incorporation relief. The decision turned on the degree of activity, not a magic number of properties.
HMRC looks for evidence that your letting is active, organised and continuous rather than passive ownership. Factors that point towards a business include:
- A portfolio of several properties under your own active management
- Substantial personal time spent on the operation, not just signing off an agent's reports
- Services provided to tenants beyond the bare letting (cleaning, furnished short lets, on-site presence)
- Regular tenant turnover and the work of re-letting
- Staff or contractors engaged on a continuing basis
- Business-like records, systems and decision-making
By contrast, two or three buy-to-lets handed to a managing agent, with the owner doing little more than banking the rent, will not pass. There is no fixed threshold, but the more your weeks resemble running a small enterprise and the less they resemble holding an investment, the stronger the position. Document the reality before you transfer, because the evidence is what HMRC scrutinises if it enquires.
The conditions for the relief to apply
Beyond the business test, section 162 imposes three structural conditions. Miss any of them and the relief fails.
- Whole business as a going concern. You must transfer the entire rental business, together with all its assets other than cash. You cannot keep your best properties personally and incorporate the rest.
- Consideration in shares. The business must be transferred wholly or partly in exchange for shares issued by the company. Relief is given in proportion to the share consideration: if part of the value comes back to you as cash or a large director's loan, the gain attributable to that part is not rolled over.
- A genuine transaction. The transfer must be a real commercial restructuring. Tax efficiency is a legitimate motive, but a wholly artificial arrangement invites challenge.
The consideration point is where well-meaning planning goes wrong. Landlords sometimes want to extract a director's loan on incorporation so they can draw funds tax-free later. That is attractive, but money left outside the shares reduces the rolled-over gain, because relief tracks the proportion of consideration taken in shares. There is a genuine tension between maximising the deferred gain and building a useful loan balance, and it needs to be modelled, not guessed. The credit balance created on a clean s.162 transfer is itself a tax-free repayment route over time, so the design of that balance matters for years afterwards.
The change that catches people out: you now have to claim it
For most of its life, section 162 was automatic. If the conditions were met, the relief simply applied. That is no longer true.
For transfers on or after 6 April 2026, Finance Act 2026 amended section 162 so the relief must be claimed. The new s.162(1)(b) requires you to make a claim, with the information HMRC asks for, by the first anniversary of the 31 January following the tax year in which the transfer took place. So a transfer in the 2026/27 tax year must be claimed by 31 January 2029. Finance Act 2026 also repealed the old s.162A election that previously allowed you to disapply the relief, so the position is now binary: claim it, or get no relief and face CGT on the transfer.
The claim is made through the Capital Gains Tax pages of your Self Assessment return for the year of transfer, with the supporting detail of the business, the valuations and the share consideration. In practice this is not a box-ticking afterthought. A late or defective claim on a transfer you assumed was tax-deferred can produce a CGT bill you did not budget for, so the claim has to be on the project plan from the outset.
Incorporation relief is a CGT relief only: do not forget SDLT
The most expensive misunderstanding in this area is treating CGT as the whole story. Incorporation relief defers CGT. It does nothing for Stamp Duty Land Tax.
When properties transfer to a company, the company is normally liable for SDLT on the market value of what it acquires, even though no cash changes hands, because the parties are connected. On residential property that includes the additional dwellings surcharge, which rose from 3% to 5% for transactions on or after 31 October 2024. For many portfolios the SDLT is the single largest cash cost of incorporating, and it lands immediately, unlike the CGT that has just been deferred.
The position differs across the UK:
| Jurisdiction | Tax on the transfer | Additional-dwelling charge |
|---|---|---|
| England and Northern Ireland | SDLT | 5% surcharge (from 31 October 2024) |
| Scotland | LBTT (Revenue Scotland) | 8% Additional Dwelling Supplement (from 5 December 2024) |
| Wales | LTT (Welsh Revenue Authority) | Higher residential LTT rates |
There is a statutory route that can reduce or remove this charge: partnership relief under Schedule 15 of the Finance Act 2003. Where a genuine partnership owns and runs the portfolio, and that partnership transfers the properties to a company connected with the partners, the sum-of-the-lower-proportions calculation can cut the chargeable consideration, in some cases to nil. The relief is real and statutory, but it is tightly conditioned. It requires a substantive, pre-existing partnership, evidenced by filed SA800 partnership returns and partnership accounts, ideally operating for a couple of years before the transfer. A partnership created weeks before incorporation purely to access the relief is exactly what HMRC's general anti-avoidance rule at s.75A is designed to strike down. We deal with the SDLT cost of incorporation in more detail in our guide to paying stamp duty twice on incorporation.
What incorporation relief does and does not cover
It helps to be precise about what is in scope, because each tax behaves differently on incorporation.
| Tax or cost | Effect of incorporation relief |
|---|---|
| CGT on the property gains | Deferred (rolled into the base cost of the shares), if conditions met and the claim is made |
| SDLT / LBTT / LTT | Not relieved. Charged on market value unless Schedule 15 partnership relief applies |
| Existing mortgages | Typically need to be repaid and replaced with company lending |
| Future Corporation Tax on profits and gains | Applies to the company going forward; unaffected by the relief |
| Tax on extracting profits | Dividends or salary taxed when drawn; the deferred CGT is separate |
The headline benefit landlords usually want is on the income side rather than CGT. Inside a company, mortgage interest is fully deductible against profits, which sidesteps the Section 24 finance-cost restriction that limits higher-rate landlords to a basic-rate tax credit on interest. Incorporation relief simply makes it possible to get into that structure without an upfront CGT charge. Whether the income-side saving justifies the SDLT cost, the refinancing and the ongoing compliance is a separate calculation, which is why the CGT question should never be answered in isolation.
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If your portfolio is not a business: the alternatives
Plenty of landlords want a company but cannot pass the business test. Incorporation relief is then off the table, but a transfer is not impossible. It simply triggers CGT, and the planning shifts to managing that charge.
Spreading transfers across tax years
You can transfer interests gradually, using each owner's annual exempt amount, currently £3,000 per person, each year. For a couple holding jointly, two allowances are available annually. This is slow and only chips at the edges of a large gain, but it suits owners with modest gains and patience.
Spouse transfers to use both positions
Transfers between spouses and civil partners are made on a no-gain, no-loss basis under s.58 TCGA 1992, so a portfolio can be moved into joint names without CGT. Done genuinely, and combined with running the portfolio as a real partnership, this can support both the s.162 business framing and Schedule 15 SDLT relief later. It has to reflect commercial reality, not exist only on paper.
Timing a transfer in a lower-income year
Residential property CGT is charged at 18% for gains falling in the basic-rate band and 24% above it. A transfer made in a year when your other income is low keeps more of the gain in the 18% band. This is marginal tuning rather than a strategy in itself, but it can matter on a single sizeable disposal.
Gift holdover relief under s.165 is a different mechanism again and is generally not available for straightforward investment property, so it is rarely the answer for a buy-to-let landlord. We compare the routes in our guide to incorporation and holdover relief for property.
A worked CGT picture
Take a landlord whose actively managed portfolio of furnished lets has an open market value of £1.2m and a total base cost of £700,000, giving an embedded gain of £500,000. If the activity qualifies as a business and the whole portfolio transfers to a company wholly in exchange for shares, incorporation relief rolls the £500,000 gain into the base cost of the shares. No CGT is due on the transfer, provided the claim is made in time.
If the same landlord instead took, say, a fifth of the value out as a director's loan rather than shares, only four fifths of the gain would be rolled over and one fifth, £100,000, would be chargeable now. At 24% that is £24,000 of CGT brought forward, in exchange for a £240,000 tax-free loan balance to draw on later. Neither figure is automatically better. The choice depends on how much you need to extract, how soon, and what the company's cash flow looks like. Our CGT on transfer to a limited company guide walks through the calculation, and the wider trade-offs sit in our complete guide to buy-to-let limited companies.
This deliberately carries no SDLT figure, because that is the variable that most often decides the case. On a £1.2m residential portfolio the SDLT, with the 5% surcharge, can be substantial, and it is payable now. That is precisely why incorporation relief on the CGT side is necessary but not sufficient: the SDLT and refinancing have to be affordable in cash for the deal to make sense.
Practical steps to incorporate without a CGT charge
If you are working towards a clean s.162 incorporation, the sequence matters.
- Build the business evidence first. Record hours, activities, services, staff and systems before any transfer, so the business test is supported by contemporaneous proof, not reconstructed later.
- Get independent valuations. Obtain RICS open market valuations at the transfer date for every property. These fix the gain and the share value, and they are the first thing HMRC tests.
- Confirm finance is available. Line up company lending before you commit, since most personal buy-to-let mortgages must be repaid on transfer and not every portfolio refinances cleanly.
- Decide the long-term structure now. Settle on one company, the share classes and who holds them before you incorporate. Splitting into multiple SPVs afterwards can crystallise the very gain you deferred.
- Model SDLT and any partnership route. Quantify the SDLT, LBTT or LTT and test whether a genuine partnership and Schedule 15 relief realistically apply. Do not assume the surcharge away.
- Diarise the s.162 claim. Note the claim deadline at the start, not the end. The relief is no longer automatic.
Common mistakes that cost landlords the relief
Assuming a buy-to-let counts as a business. The default HMRC position is investment. Without genuine activity, the relief simply does not apply, and discovering that after the transfer is the worst outcome.
Keeping the best properties out. The whole business must go. Cherry-picking breaks the relief on everything transferred.
Pulling too much out as cash or loan. Consideration taken outside the shares is not rolled over, so an over-large director's loan partially defeats the deferral.
Forgetting SDLT. The CGT can be perfectly deferred and the deal can still be uneconomic once the immediate SDLT is added.
Missing the claim deadline. For transfers from 6 April 2026, no claim means no relief. This is new, and a lot of older guidance has not caught up.
Is incorporating right for your portfolio?
Even where the relief is available, incorporating is not always the right call. A company pays Corporation Tax on rental profits and on gains it later makes, and you face a further tax charge when you extract profits as dividends or salary. You also lose personal CGT reliefs such as Private Residence Relief on any property you might otherwise have moved into, and you take on company filing and administration.
Incorporation tends to reward higher-rate landlords with a genuine, actively managed, geared portfolio who are squeezed by Section 24 and who intend to retain and reinvest profits rather than live off them. It rarely rewards a small agent-managed holding where the business test fails, the SDLT is heavy relative to the portfolio, and the rent is needed as income. The honest answer depends on your marginal rate, gearing, time horizon and plans for the cash, which is why the modelling is worth doing properly before anything moves. The same trade-offs feed into the wider incorporation decision in light of the 2027 property income tax rates, since separate property rates of 22%, 42% and 47% take effect from 6 April 2027 in England, Wales and Northern Ireland.
Getting it right
Incorporation relief is a genuine route to move a rental business into a company without an immediate CGT charge, but it rewards precision: a defensible business case, a clean whole-business transfer for shares, a properly modelled SDLT position, and a timely claim. The pieces interact, and getting one wrong can undo the others. If you are weighing it up, start by documenting how you actually run the portfolio and gathering the numbers. The earlier the planning begins, the more of these levers remain available to you.