Demerger routes
Seven demerger mistakes that create a tax bill
Most demerger tax bills come from avoidable mistakes: the wrong route, steps out of order, missed clawbacks. Seven to watch for and how to avoid them.
Most demergers that end in a tax bill don't fail because of an obscure rule. They fail because of a handful of predictable mistakes: the wrong route, steps taken in the wrong order, or a later event that claws back a relief. Here are seven we see come up again and again, and how to avoid each one.
The common theme is simple. Demerger reliefs have conditions and anti-avoidance rules, and most of them look at the whole plan, including what happens afterwards. Getting the plan right before anything is signed is far cheaper than repairing it later.
1. Choosing the route before understanding the facts
There are three main routes: a statutory demerger, a capital reduction demerger and a liquidation demerger. Each has its own conditions.
The most expensive version of this mistake is using a statutory demerger to separate property. The statutory rules in the Corporation Tax Act 2010 only cover trading activities, and a business of holding property for rent is usually an investment activity. If the conditions aren't met, the distribution isn't exempt. It can then be taxed as an income distribution for the shareholders, and the company can have a capital gain.
How to avoid it: start from what each business actually does and what the shareholders want afterwards, then pick the route. Our route finder is a sensible first check.
2. Implementing first and asking HMRC later
HMRC clearance is not compulsory for most demergers, but it is usually the right first step. It gives certainty that HMRC accepts the transaction is not caught by the relevant anti-avoidance rules, before anything irreversible happens.
Implementing first and seeking comfort afterwards removes the chance to adjust the plan if HMRC has concerns. Some clearances also have to be obtained before a particular step, for example before shares are issued. See HMRC demerger clearances.
How to avoid it: build clearance into the timetable from the start. HMRC has 30 days to respond to a complete application, and further questions restart the clock.
3. Leaving things out of the clearance application
A clearance is only as good as the disclosure behind it. If an application doesn't mention an expected sale, a planned cash payment or a shareholder about to emigrate, the clearance may not protect the transaction that actually happens.
How to avoid it: disclose plans that are known or reasonably expected, even where they are not yet certain. If the plan changes after clearance, take advice before going ahead.
4. Forgetting what happens to property already moved within the group
Moving property between group companies is usually tax free at the time, using intra-group capital gains rules and SDLT group relief. The problem comes when the company that received the property leaves the group.
| Charge | Trigger | Period |
|---|---|---|
| Capital gains degrouping charge (s179 TCGA 1992) | Company leaves the group holding an asset acquired intra-group | Within six years of the intra-group transfer |
| SDLT group relief clawback (FA 2003 Sch 7 para 3) | Purchaser leaves the vendor's group holding the property | Within three years, or under arrangements made within that period |
A demerger is often exactly the event that makes a company leave its group. There are exemptions in some cases, for example on an exempt distribution under the statutory demerger rules, but they have their own conditions.
How to avoid it: list every intra-group transfer of property or other chargeable assets in the last six years before choosing the steps.
5. Assuming stamp duty and SDLT reliefs will follow
Stamp duty on shares and SDLT on property each have their own reliefs, with their own tests. They don't automatically follow the capital gains treatment.
The common traps:
- Mirror-image tests. Share-for-share stamp duty relief and SDLT reconstruction relief broadly require shareholders to hold the same proportions before and after. Partitions, where shareholders take different businesses, usually fail this.
- Control arrangements. Stamp duty relief for a new holding company can be denied where there are arrangements for someone to obtain control of it.
- Three-year clawbacks. SDLT reconstruction and acquisition relief can be withdrawn if control of the acquiring company changes within three years.
See stamp duty and SDLT on demergers and our article on the SDLT traps when moving property.
6. Putting cash into the deal without planning it
Shareholders sometimes want a cash element to balance a split, or the company wants to repay a loan or buy out a departing shareholder around the time of the demerger. Each of these can cause problems:
- The capital gains reliefs for reconstructions expect shares, not cash, to be issued to shareholders. Cash usually means a part disposal.
- The transferring company must receive nothing for the business beyond the assumption of liabilities.
- After a statutory demerger, a chargeable payment to shareholders within five years can be taxed as income. We explain this in the five-year rule.
- The transactions in securities rules can tax as income what would otherwise be capital.
How to avoid it: decide early whether any cash will move, and plan and disclose it as part of the scheme.
7. Ignoring the position after the demerger
A demerger changes the companies the shareholders own. That affects reliefs that look forward:
- Business Asset Disposal Relief. The company whose shares are later sold must meet the trading and personal company tests for the two years before the sale. See demergers and BADR.
- Inheritance tax Business Relief. Shares in a company that mainly holds investments, such as let property, don't qualify.
- Substantial Shareholding Exemption on a later sale of a subsidiary.
- Post-completion filings, including the 30-day return after an exempt distribution, stamp duty adjudication and SDLT returns.
How to avoid it: model where each shareholder will be in two or three years, not just on the day of the demerger.
Why these mistakes keep happening
Demergers are occasional events for most companies and most advisers. The rules are spread across several Acts: corporation tax, capital gains, income tax, stamp duty, SDLT, company law and insolvency law. Each relief is usually checked in isolation, when the real risk sits in how they interact. A step that is perfectly relieved on its own can cause a clawback of another relief two steps later.
There is also a natural tendency to start with the outcome the client wants and work backwards to the paperwork. That works for simple transactions. For a demerger, the conditions of each relief need to shape the steps from the beginning, and the plans for the next few years need to be on the table before the route is chosen. That's why we always start with the facts and the commercial aims, and only then design the steps.
A quick self-check
Before going further, can you answer yes to each of these?
- We know whether each business is trading or investment.
- We have a list of intra-group asset transfers in the last six years.
- We know who will own what afterwards, and whether any cash will move.
- We know whether a sale, investment or succession step is expected within three to five years.
- Clearance is planned before any step is implemented.
- Stamp duty and SDLT have been checked separately from capital gains.
If any answer is no, it's worth a conversation before going further. The right route depends on the facts, and the order of the steps matters, which is where we come in.
This article is general information, not advice. Tax rules change and their effect depends on your circumstances. Please speak to us before acting.
