Mergers and demergers – when is a reorganisation worth the work?

A reorganisation is worth the work when the structure really is wrong: the property sits in the same company as the risky operations, two lines of business should have been separated, or the co-owners are going their separate ways. Done properly it can happen without immediate tax, because the tax positions carry forward. Done wrongly, the same transfer is treated as an ordinary sale.

A merger joins companies together

In a merger one company takes over the whole of another company's assets, rights and obligations. The transferring company ceases to exist. That can make sense where the group has several companies with overlapping activity, administration, systems and costs. A merger is particularly relevant where the aim is to simplify.

A demerger splits a company

In a demerger the opposite happens: all or part of the assets, rights and obligations move to one or more other companies. A demerger is often used before selling part of a business, on a family succession, when splitting between co-owners, when separating out property or investments, or when establishing a new group structure. The classic case is property sitting in the operating company that should come out before the business is sold.

«Tax-free» really means deferred tax

Chapter 11 of the Taxation Act makes an exception from ordinary realisation taxation for qualifying mergers and demergers. The basic idea is tax continuity. The old tax bases, acquisition dates and relevant tax positions carry forward. The latent tax does not disappear – it carries into the new structure. The same applies to shareholders: where old shares are exchanged for new ones as part of the reorganisation, historical tax positions are as a general rule carried onto the consideration shares. In a demerger the nominal and tax-paid-in share capital also has to be allocated under the statutory rules.

You cannot freely pay shareholders in cash

In an ordinary merger or demerger the consideration must as a starting point be shares. The Companies Act allows additional consideration, but it cannot exceed 20% of the total. Where someone is to be bought out with money rather than shares, that is usually a different transaction from a tax-free reorganisation – see Buying out a co-owner.

An unequal demerger when the owners separate

Where the owners will not participate in the same proportions in every company after the demerger, stricter decision requirements apply. The Companies Act requires the support of all votes cast and of the whole share capital represented at the general meeting. So it is essential to get the owners to agree the valuation before the plan is locked down. If you cannot agree what the two parts are worth, the process stops – see What is my business worth?

A demerger before a sale can matter a great deal for tax

An asset can in some cases be demerged into its own company before the shares are sold within the participation exemption. That issue was central in ConocoPhillips III, Rt. 2014 p. 227. The practice following that judgment has been carried forward since the anti-avoidance rule was put into statute, but that does not mean every sequence of transactions involving a demerger is automatically accepted. The closer the demerger is to the sale in time and in planning, the more the specific assessment matters.

Old losses are a trap of their own

Section 13-3 of the Taxation Act can apply where a reorganisation is mainly motivated by exploiting a general tax position, such as a carried-forward loss. That is the same rule that can catch acquisitions of loss-making companies, and that lies behind the Armada judgment discussed in Group contributions.

VAT has to be assessed separately

A tax-free merger or demerger does not mean the VAT rules automatically follow the same continuity. That matters particularly for real property and other capital goods carrying VAT adjustment obligations. Where a right or an obligation to adjust is to be transferred, specific documentation is required, and the adjustment rules set both content requirements and a deadline for the agreement. A forgotten adjustment agreement can produce a VAT bill that swallows the whole gain from the reorganisation.

The process happens in two main stages

The decision to merge or demerge has to be notified to the Register of Business Enterprises within one month of the plan being approved. A creditor period of six weeks then runs before implementation can be notified. Mergers and demergers also have their own documentation requirements, and auditor confirmation can be necessary – including for contributions in kind and capital increases, even in companies that have otherwise opted out of an audit.

Real property still has to be registered

Qualifying mergers and demergers can be carried out without document duty when real property is transferred. But the land register still has to be dealt with. In HR-2017-33-A the Supreme Court held that property transferred by demerger but not registered lacked protection against the transferring company's bankruptcy estate. The reorganisation itself was in order – but the property was lost because the registration was not followed up.

Not every pre-emption right is triggered by a merger

In HR-2017-1664-A the Supreme Court held that the merger in question was not a «sale» under the particular pre-emption clause. That does not mean every pre-emption right or change-of-control clause is automatically irrelevant in a merger or demerger. Material agreements – leases, loan agreements, supplier agreements and shareholders' agreements – should be reviewed before the plan is adopted.

Small companies have an important accounting simplification

Section 5-16 of the Accounting Act allows small companies to carry forward book values in a merger or demerger. NRS 8 was updated in December 2025 and still provides this simplification. Tax neutrality and the accounting method are still two different questions, and the answer to one does not give the answer to the other.

When is it not worth the trouble?

Not every structural problem needs a demerger or a merger. Where the transaction concerns a single smaller asset with modest tax consequences, the formal reorganisation can cost more than it solves. But where there are substantial latent values, real property, several owners, a future sale or a group structure that has grown without a clear plan, a merger or demerger can be very valuable. The useful question is: what structure do we want to end up with – and are tax, VAT, accounting and company law all being handled at the same time? Greenleaf can map the assets and tax positions, model the before and after structures, prepare the accounting basis and ensure correct bookkeeping and reporting. Merger and demerger plans, complex ownership splits, the contractual consequences and anti-avoidance assessments should be handled with a lawyer or tax adviser, and with an auditor where needed.

This is general guidance, not advice on your specific case. Deadlines, rates and amounts change – always check the current rules, or get in touch with us.

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