SDLT Traps When Demerging Property Between Companies

If a demerger involves property, stamp duty land tax (SDLT) is often the largest tax at stake. Capital gains reliefs can leave the shareholders and the companies in a neutral position, but SDLT works differently. It is charged on the value of the land, not on a gain, and its reliefs have separate conditions and separate clawbacks.

Why SDLT hurts in a demerger

Moving land from one company to another is normally a land transaction. Two features push the cost up:

• Market value. When the buyer is connected with the seller, the chargeable consideration is generally taken to be at least market value, even if nothing is paid (section 53 Finance Act 2003).
• Non-residential rates. On commercial property in England and Northern Ireland, SDLT is 0% up to £150,000, 2% from £150,001 to £250,000 and 5% above £250,000.

Unless a relief applies, shifting a valuable commercial building between connected companies can cost a lot even though no cash moves. The reliefs that matter are in Schedule 7 to the Finance Act 2003.

Trap 1: group relief and the three-year clawback

Group relief removes SDLT on a transfer between companies in the same group, broadly where one is a 75% subsidiary of the other or both are 75% subsidiaries of a third.

A common plan is to move the property into a new subsidiary using group relief, then demerge that subsidiary. The difficulties are these:

1. Arrangements at the start. Group relief is not available if, when the transfer is made, there are arrangements for the buyer to leave the group. If the demerger is already planned when the property moves, the relief can fail from the outset.
2. Withdrawal within three years. If the buyer leaves the seller's group within three years of the transfer, or under arrangements made in that period, while still holding the property, the relief is withdrawn.
3. The size of the charge. It is based on market value at the date of the original transfer, not today's value.

There are narrow exceptions. The relief is not withdrawn where the buyer leaves because of something done in winding up the seller, or because of an acquisition of shares qualifying for stamp duty relief under section 75 Finance Act 1986, if further conditions are met. There is also a rule for cases where the buyer leaves because the seller leaves the group. Each exception has its own anti-avoidance conditions, so none should be taken for granted.

The lesson: do not use group relief to move property as a first step towards a demerger without checking how the later steps interact with it.

Trap 2: reconstruction relief and the mirror-image test

Reconstruction relief can remove SDLT entirely where a company takes over all or part of another company's undertaking as part of a scheme of reconstruction. Broadly:

• the only consideration is non-redeemable shares issued to the target's shareholders
• every shareholder of each company is a shareholder of the other afterwards
• each holds the same proportion in both, or as near as may be
• the acquisition is for bona fide commercial reasons and not part of a tax avoidance scheme

Unlike the capital gains rules since November 2025, this SDLT relief still contains a bona fide commercial reasons test.

The traps are:

• Partitions fail the mirror test. If shareholders are parting company, they will not hold the same proportions in each business.
• Other consideration. Cash or anything beyond the shares can take the transaction outside the relief.
• Change of control within three years. The relief is withdrawn if control of the acquiring company changes within three years, or under arrangements made in that period, while it still holds the property.

Trap 3: acquisition relief is not a fallback for property businesses

Acquisition relief does not need mirror-image shareholdings, but it only reduces SDLT to 0.5% of the chargeable consideration. The undertaking acquired must have as its main activity a trade that is not wholly or mainly dealing in land, and cash or other non-share consideration is capped at 10% of the nominal value of the shares issued.

Letting property is generally an investment activity, not a trade. So where the business being moved is a rental portfolio, acquisition relief is usually unavailable. It is more helpful where a trading business that happens to own its premises is being moved. The same three-year change of control withdrawal applies.

The three reliefs compared

Trap 4: distributing property in specie

Sometimes a company plans to distribute property, or shares in a property company, rather than sell it. An exception to the market value rule exists where a company distributes its assets, but it does not apply if group relief was claimed on the property, or on property it derives from, in the previous three years. Liabilities taken over, such as a mortgage, can also count as chargeable consideration. The answer depends on how the steps are structured and in what order.

Trap 5: the paperwork

• In England and Northern Ireland, a land transaction return is usually due within 14 days of the effective date, even where relief is claimed.
• If a relief is withdrawn, a further return is due within 30 days of the triggering event.
• Stamp duty on shares is separate, with its own reliefs claimed through HMRC adjudication.

Wales and Scotland

SDLT applies only in England and Northern Ireland.

• Wales has Land Transaction Tax under the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, with group relief in Schedule 16 and reconstruction and acquisition relief in Schedule 17. It is run by the Welsh Revenue Authority.
• Scotland has Land and Buildings Transaction Tax under the Land and Buildings Transaction Tax (Scotland) Act 2013, with group relief in Schedule 10 and reconstruction and acquisition relief in Schedule 11. It is run by Revenue Scotland.

The reliefs have a broadly similar shape, but rates, details and filing rules differ. A group with property in more than one nation needs each regime checked separately.

Before you move any property

• List each property, its location, value, mortgage and how it was acquired.
• Note any intra-group transfers in the last three years for SDLT and six years for capital gains degrouping.
• Decide who will own what afterwards, and whether it mirrors the current position.
• Be clear about any sale, investment or change of control expected within three years.
• Check whether the business being moved is a trade or an investment.

Relief depends on the facts and the order of the steps matters. Our specialist team prepares the advice, reviewed by a Chartered Tax Adviser. To discuss a property demerger, book a call with our team, or read about the capital reduction demerger.

This article is general information, not advice. Tax rules change and their effect depends on your circumstances. Please speak to us before acting.

For more on how demergers work in practice, see our specialist demerger practice, Demerger Tax.