How Much Surplus Cash Is Too Much? Protecting Trading Status for BADR, SSE and Business Relief

A profitable owner-managed company builds up cash, which is a good problem to have. But beyond a certain point that cash can change how the company is treated for tax and put three of the most valuable reliefs in danger:

• Business Asset Disposal Relief (BADR), which taxes qualifying gains on a share sale at 18% from 6 April 2026, on up to £1m of lifetime gains
• the substantial shareholding exemption (SSE), which can exempt a company's gain on selling a trading subsidiary
• Business Relief for inheritance tax, which gives 100% relief on the first £2.5m of qualifying business and agricultural property per person from 6 April 2026, and 50% above that

A holding company can protect cash from the risks of the trade. It does not, on its own, protect trading status. This article explains why.

Three reliefs, two kinds of test

BADR and SSE both ask whether the company is trading, or the holding company of a trading group, with no non-trading activities "to a substantial extent". BADR draws on section 165A of the Taxation of Chargeable Gains Act 1992 and SSE on Schedule 7AC. These are cliff-edge tests. Either the company passes or it does not, and failing means losing the relief on the shares or the gain.

Business Relief works differently. Under sections 105 and 112 of the Inheritance Tax Act 1984, the question is whether the business is wholly or mainly making or holding investments, and whether part of the value is made up of excepted assets. It is more forgiving at the margin, but it has its own trap.

How HMRC judge "substantial"

HMRC's Capital Gains Manual (CG64090) treats non-trading activity above 20% as substantial. It looks at several indicators and weighs them together rather than applying one fixed percentage:

• non-trading income as a share of total income
• non-trading assets as a share of the asset base
• expenses incurred and staff time spent on non-trading activities
• the history of the company

HMRC say that where neither the income nor the asset indicator points to more than 20% non-trading, a detailed review is unlikely.

HMRC's Capital Gains Manual (CG64090) treats non-trading activity above 20% as substantial.

Is cash an investment?

Not automatically. Under CG64060, HMRC accept that putting surplus funds on short-term deposit can be part of running the trade. They ask whether the cash meets the trade's cash-flow needs, whether it is earmarked for trading purposes, what it is invested in and how actively it is managed.

However, HMRC also say that holding significant earnings for the long term may amount to an investment activity. Cash that has sat for years with no plan, and cash placed in investment portfolios, is likely to count against you.

A simple illustration

This is an illustration, not a client example. A group's balance sheet shows:

• trading assets (equipment, stock, debtors and goodwill at market value): £4,000,000
• cash needed for working capital: £400,000
• cash with no identified use: £1,100,000
• total: £5,500,000

The unallocated £1.1m is exactly 20% of the £5.5m asset base, so on the asset indicator alone the group sits at HMRC's threshold. If that cash also produces a meaningful share of income, or another year's profit is added to it, the position worsens.

Goodwill matters here. HMRC accept that market value can be an appropriate measure, so a business with valuable goodwill can often carry more cash than its accounts suggest.

Why a holding company does not solve it alone

The usual way to protect cash is to pay it up from the trading company to a holding company as a dividend. That dividend is normally exempt from corporation tax, and the cash is then beyond the reach of the trading company's creditors.

For BADR, though, the holding company must head a trading group, and section 165A treats the group's activities as a single business. Cash in the holding company is still in the group, so the same 20% analysis applies.

For SSE, the test falls on the company being sold. If the holding company sells the trading subsidiary, cash already moved up helps the subsidiary's position. If the exit is a sale of the holding company itself, the group-wide test is back.

Business Relief and excepted assets

Shares in a holding company can qualify for Business Relief where its business is wholly or mainly holding trading companies. "Wholly or mainly" means more than half, so a trading group with some surplus cash will often still qualify.

The restriction comes through excepted assets. An asset that has not been used wholly or mainly for the business throughout the last two years, and is not required for future use, is left out of the value that attracts relief. Use by another group company counts as business use.

The courts have set a high bar for "required": there must be something close to a clear intention that the money will be used on a particular project. HMRC's manual says cash and bank balances should always be examined carefully. With the £2.5m allowance now in force, every pound of excepted assets falls outside relief entirely, while qualifying value above £2.5m still receives 50%.

What you can do about it

• Earmark cash properly. If money is held for a new site, a vehicle replacement or an acquisition, record that in board minutes and budgets, and keep them current.
• Use it in the trade. Investing in the business, repaying debt or funding a trading subsidiary keeps cash on the trading side.
• Pay it out. Dividends are taxed at 10.75%, 35.75% or 39.35% for 2026/27 after the £500 allowance, but they take the cash out of the group test for good.
• Separate it from the group. A sister company owned directly by the shareholders and holding investments sits outside the trading group test. Getting assets there usually needs a demerger. See our overview of the capital reduction demerger.
• Keep it in an investment subsidiary, knowingly. An investment company inside the group protects the assets from trading risk and lets profit flow up tax-free, but it remains part of the group test. That is acceptable while the investment side stays small relative to the trade. See our page on the linked investment company.
• Review early. BADR looks back two years, SSE looks back across the qualifying holding period and Business Relief looks at the last two years. A review well before a sale or succession gives time to act.

When to look

Cash that has grown for years with no plan, money moved into funds or let property, noticeable investment income, or a sale or gift of shares on the horizon are all signs it is time for a review. Our specialist team prepares the advice, which is reviewed by a Chartered Tax Adviser, and we can test your group against each of the three reliefs. To talk it through, book a call with our team. Our holding company page explains how the structure fits together.

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

Our specialist practice Holding Company covers group structures and holding company insertions in more depth.