When one company stops being enough

Most limited companies start life as one entity doing everything: it trades, it holds the cash, it owns the van or the building, and it carries every risk the business runs. For the first few years that is the right shape. It is simple to run, cheap to keep and easy to understand.

Then the business grows up. Profit builds that you don't want to draw as dividends and pay tax on. You buy the unit you were renting. A second venture starts, or a business partner wants their own slice. Someone mentions selling in five years. At that point the single-company structure starts to cost you money and expose you to risk, and a group structure with a holding company is usually the answer. This is what it does, when it is worth it, and where people get it badly wrong.

What a holding company does

A holding company is an ordinary limited company whose job is to own shares in other companies rather than to trade itself. You own the holding company; the holding company owns your trading company, or companies. Nothing changes on the ground: the trading company keeps its name, its contracts, its staff, its VAT and PAYE registrations and its bank account.

Three things change above the surface. First, dividends paid up from a subsidiary to its parent company are normally exempt from corporation tax, so profit can leave the trading company without a tax charge. Second, whatever sits in the holding company, whether cash, property or investments, belongs to a separate legal person, out of reach of the trading company's creditors. If the trading company is sued or fails, the assets above it are protected. Third, the group can be arranged so that the risky activity and the valuable assets never live in the same company.

That last point is the whole idea. Trading is where the risk is. Property, surplus cash and a second business are where the value is. A group keeps them apart.

The four moments a group structure pays for itself

You own your premises, or you're about to buy them. Holding a building inside the company that trades from it means one bad contract or one large claim puts the building at risk. A separate property company that owns the premises and lets them to the trading company keeps the asset safe, and rent paid at a market rate is a deductible cost for the trading company.

Profit is piling up that you don't need. Once you're drawing what you need and the company still makes more, leaving it in the trading company exposes it. Moving it up to a holding company costs nothing in tax and lets it be invested, lent back, or used to buy the next business, all away from the trading risk.

You run more than one business, or a partner wants to split. Two trades in one company share one set of accounts, one tax bill and each other's liabilities. Separate subsidiaries under one holding company give each its own figures, its own risk and, if you ever need it, a clean way to sell or demerge one without disturbing the other.

You can see a sale coming. This is where the numbers get large, and it has its own section below.

The reliefs doing the heavy lifting

Putting a holding company above an existing company is done with a share-for-share exchange. You swap your shares in the trading company for shares in the new holding company. Done correctly, the tax rules treat it as if nothing has been sold, so there is no capital gains tax on the swap. Done without meeting the conditions, HMRC can treat it as a disposal at market value and you pay tax on a gain you never received in cash.

The condition that matters most is that the exchange is for genuine commercial reasons and not mainly to avoid tax. The way to prove it is an advance clearance application to HMRC before anything is signed. HMRC confirm in writing that the reliefs apply. We never run a restructure without one.

Once the group exists, three more reliefs come into play. Dividends move up the group without corporation tax, as above. If one company makes a loss, group relief lets another group company set that loss against its own profit for the same period. And when you come to sell a subsidiary, the substantial shareholding exemption can make the whole gain free of corporation tax, provided the holding company has owned at least 10% of it for a continuous twelve months and the company being sold is a trading company.

Stamp duty on the share exchange is usually relieved where the shareholdings in the new holding company mirror the old ones, but the conditions are precise and the relief has to be claimed.

Where it goes wrong

Associated companies. Corporation tax is 19% on profits up to £50,000 and 25% above £250,000, with a marginal rate of 26.5% in between. Those thresholds are shared between all the companies you control. With a holding company and one trading subsidiary, the 25% rate starts at £125,000 of profit in each company, not £250,000. With three companies it starts at £83,333. A structure set up to save tax can raise it instead if nobody has run the numbers.

No clearance, no commercial reason. A share-for-share exchange done because an article said it was tax-free, with no clearance and no documented business purpose, is the case the anti-avoidance rules were written for. The result can be a capital gains bill on the full value of your company, with no cash to pay it.

Breaking your own sale relief. Business asset disposal relief cuts the capital gains tax rate on a qualifying sale to 18%, against a standard 24%, on the first £1 million of lifetime gains. It depends on you personally holding at least 5% of the shares and votes, and being an officer or employee, for the two years before the sale. A restructure that changes who owns what, or that moves you a step further from the trading company, can reset or break that clock without anyone noticing until completion.

Losing inheritance tax relief. From April 2026, business property relief gives 100% relief on the first £1 million of qualifying business assets and 50% above it. A trading company qualifies. A holding company that spends its time holding cash and investments can fail the test as a business that is wholly or mainly investment, and surplus cash the trade doesn't need can be excluded as an excepted asset. Where the money sits in the group, and what it is doing there, decides whether your family pays 20% on it.

Running costs. Every company needs its own accounts, corporation tax return and confirmation statement, and a group may need consolidated accounts and a VAT group. None of that is expensive against the value it protects, but it is not free, and it is a reason not to build a group you don't need.

The property company, and the trading company that rents from it

The most common restructure we run is also the simplest to explain. The premises come out of the trading company, or are bought fresh, into a separate property company, and the trading company pays it rent. The building is protected, the rent is deductible, and when the trade is eventually sold the buyer takes the business without the building, which most buyers prefer.

The details are where the value is won or lost. Moving an existing property between companies can trigger capital gains tax, stamp duty land tax and VAT, so the route, and whether reliefs apply, matters more than the destination. The rent has to be at a market rate and documented in a lease. If the property has been opted to tax, VAT follows it. And the lender has to agree, because the mortgage usually sits with the company that owns the building.

Selling, and why the holding company is where the money lands

Sell your trading company personally and you pay capital gains tax on the proceeds, at 24% or, with business asset disposal relief, 18% on the first £1 million. Sell the same company from a holding company that qualifies for the substantial shareholding exemption and the gain is exempt from corporation tax altogether. The full proceeds land in the holding company untaxed.

That money can then buy the next business, fund a property portfolio, or be drawn down over several years in a way that suits your income, rather than all at once at the top rate. For an owner who is a few years from a sale, this single point is often worth more than every other piece of tax planning put together. It only works if the structure has been in place, and the conditions met, for the qualifying period, which is why the time to set it up is before the buyer appears, not after.

How we run a restructure

We start with the numbers, not the diagram. Your profit, your drawings, your property, your other ventures and your plans for the next five years go into a model that shows what a group would save, what it would cost to run, and what the associated-company rules would do to your corporation tax. If the answer is that a group doesn't pay for itself yet, we tell you so.

If it does, we write up the commercial reasons, apply for the HMRC clearances and wait for them, agree valuations where they're needed, and work with your solicitor on the share exchange, the leases and the Companies House filings. Then we run the group year on year: each company's accounts and tax return, the group position, and the dividend and salary planning across all of it.

All of that is a fixed fee, agreed upfront, from an AAT-licensed practice that has done this for owners across Kent and the UK. No hourly billing, and no surprise at the end. Our company structuring and holding companies service sets out what's included.