Section 54: when the connected-company stamp duty rule switches off
For most buyers, stamp duty is charged on the price they pay. For one group of transactions it is charged on something else entirely — the market value of the property, whatever actually changed hands. That is the effect of section 53 of the Finance Act 2003, the "deemed market value" rule that applies when the buyer is a company connected to the seller. It can turn a paper transfer with no cash behind it into a five-figure tax bill.
Section 54 of the same Act is the release valve. It sets out three — and only three — cases where the market-value rule is switched off. This guide explains what those cases are, how the figures move when one applies, and where the rule sits alongside the 5% surcharge and the 17% flat rate that also fall on company purchases.
This is general information about how the rules work, not tax or legal advice. Speak to a qualified adviser before acting.
The rule section 54 carves into
Under the connected-company market-value rule, where the buyer is a company and the seller is connected to it, the chargeable consideration is treated as not less than the market value of the interest transferred (Finance Act 2003, s53). The actual price — even £0 — is set aside.
The logic is that a controlling shareholder and their company are not at arm's length, so a "sale" between them could otherwise be priced at nothing. HMRC's manual at SDLTM04030 sets out the mechanics.
Two features make the rule bite harder than people expect:
- A company buying a dwelling almost always pays the higher rates for additional dwellings — an extra 5 percentage points across the price (Finance Act 2003, Sch 4ZA). There is no "only home" exception for a company.
- Where a single dwelling costs more than £500,000, a company can face a 17% flat rate on the whole price unless a relief applies (Finance Act 2003, Sch 4A).
What that looks like in numbers
Take a half-share of a £300,000 home — a £150,000 interest — moved for no cash. The figures below use HMRC's 2026 England and Northern Ireland rates (via Homecost's stamp duty calculator, checked 11 July 2026).
| Who receives the half-share | Chargeable consideration | SDLT |
|---|---|---|
| Another individual, no mortgage passing | £0 (no consideration) | £0 |
| A connected company (s53) | £150,000 (market value) | £8,000 |
The company figure is the £500 standard charge plus the 5% additional-property surcharge on £150,000 (£7,500). The same move between two individuals, with no money and no mortgage passing, is not a chargeable transaction at all. That gap — £0 against £8,000 — is what section 54 can close in the narrow cases it covers.
The three exceptions
Section 54(1) lists the cases where section 53 "does not apply". There are three, and the wording is exhaustive.
Case 1 — a corporate trustee. Immediately after the transaction the company holds the property as trustee in the course of a business that consists of or includes the management of trusts (s54(2)). A professional corporate trustee taking legal title is not acquiring the value for itself, so the market-value floor is switched off.
Case 2 — connected only as trustee. The company holds the property as trustee, and the seller is connected with it only because of the trustee-capacity connection in section 1122(6) of the Corporation Tax Act 2010 (s54(3)). This stops the rule catching a genuine trust arrangement purely as a side-effect of how "connected persons" is defined. Homecost's guide to how trusts and nominees are treated for SDLT covers the wider trust position.
Case 3 — a distribution of company assets. The seller is a company and the transaction is, or is part of, a distribution of that company's assets — a dividend paid in the form of the property, or a distribution on a winding up — whether or not it is connected with the company being wound up (s54(4)(a)).
Case 3 is the widest of the three, and it comes with a condition.
The one-way gate
The market-value rule is, in effect, a one-way gate. It catches value moving into a connected company: a "gift" of a property into a company you control is taxed as if full value had passed. Case 3 lets value move out again by distribution without the same floor — the charge falls on the actual consideration, which for a pure distribution is nil.
But Case 3 is switched back off — so market value applies again — where the property (or an interest it derives from) was itself moved into the group within the previous three years in a transaction on which group relief was claimed (s54(4)(b)). In plain terms: a company cannot bring a property in free of SDLT using group relief and then distribute it straight back out inside three years to lift it out of the tax net. HMRC's manual at SDLTM04040 sets out the restriction.
How this differs from the ordinary no-consideration exemption
It is worth separating section 54 from the general rule that a gift with nothing given in return is simply not taxed. A transfer for no chargeable consideration — no cash, and no mortgage debt taken on — is exempt under Schedule 3 to the Finance Act 2003, which is why the individual-to-individual half-share above came out at £0.
Section 54 does something narrower. It does not say "no consideration, no tax." It says the market-value substitution in section 53 does not happen, so the transaction is taxed on whatever consideration actually passed. If a mortgage is assumed on the way through, that assumed debt is itself chargeable consideration — the same way it is when a share of a home moves between individuals. Section 54 removes the market-value floor; it does not remove the debt.
Where the bigger company charges still sit
None of the three cases touches the higher-rate surcharge or the enveloped-dwelling charge. Those are separate tests that run on the consideration once section 53 has — or has not — substituted market value:
| Single dwelling bought by a company | Basis | SDLT (2026 rates) |
|---|---|---|
| £300,000, higher rates | standard + 5% | £20,000 |
| £600,000, higher rates | standard + 5% | £50,000 |
| £600,000, 17% flat rate, no relief | 17% of price | £102,000 |
The £500,000 line matters because it is not a fringe. Some 18.7% of the 759,637 residential sales recorded in England and Wales for 2025 were at £500,000 or more (HM Land Registry Price Paid data, checked 11 July 2026) — so a large slice of the market sits in the band where a company purchase can meet the 17% charge before any relief is considered.
Try the figures
You can run any of these prices through Homecost's stamp duty calculator, which applies the 2026 England and Northern Ireland bands, the additional-property surcharge and first-time-buyer relief. For a sense of what larger purchases actually cost in the areas where company ownership clusters, the true cost of a Westminster (SW1A 1AA) address breaks the monthly and one-off numbers down street by street.
Sections 53 and 54 are precise, and which case applies turns on the exact facts — who holds legal title, in what capacity, and what has happened in the previous three years. A conveyancer or tax adviser confirms the position on a specific transaction. Speak to a qualified adviser before acting.
More explainers are in Homecost's cost-intelligence guides.