Too much cash in your company? Why doing nothing can be a tax mistake

Posted: September 16, 2026

For many company shareholder/ directors, building up a healthy cash balance is a sign that the business is doing well. Having cash available provides security, helps with unexpected costs and gives the company the resources to invest and grow.

But there can come a point when a company is holding significantly more cash than it reasonably needs.

At that stage, simply leaving the money in the company may not always be the best option. Surplus cash can create tax issues, particularly if you are ultimately planning to sell the business, and there may be better ways to use or invest it. It is an area worth reviewing alongside your wider corporation tax services.

How much cash does the business actually need?

There is no set amount of cash that a trading company is permitted to hold.

A business may quite legitimately need substantial reserves to fund working capital, future expansion, equipment purchases, recruitment, acquisitions or simply to protect itself against fluctuations in trading.

The important distinction is between cash that is genuinely required for the business and money which has accumulated without any particular commercial purpose.

If your company has built up a significant cash balance, the first question should therefore be: what is this money ultimately intended for?

Could surplus cash affect the tax position when you sell?

This is particularly important for shareholders who may eventually sell their company.

Business Asset Disposal Relief (BADR) can reduce the rate of Capital Gains Tax applying to qualifying disposals of shares. From 6 April 2026, the BADR rate is 18%.

One of the conditions is that the company must be a trading company, or the holding company of a trading group, throughout the relevant qualifying period.

Having surplus cash does not automatically mean that a company stops being a trading company. However, substantial non-trading activities can cause difficulties.

HMRC considers a range of factors when deciding whether non-trading activities have become substantial, including the company’s income, assets, expenditure and the amount of management time devoted to non-trading activities. There is therefore no simple rule that says a particular percentage of cash automatically causes BADR to be lost.

A large investment portfolio sitting alongside a relatively small trading operation, however, is clearly more likely to cause concern than cash retained for identifiable future business requirements.

This means that owners contemplating a sale should ideally consider the position well in advance rather than discovering shortly before completion that years of accumulated cash and investments have complicated their BADR position. We look at the wider timetable in Preparing Your Business for Sale – Three Years Before You Sell.

What about Inheritance Tax?

There is a separate issue for Inheritance Tax purposes.

Shares in an unquoted trading company may qualify for Business Relief, although the rules changed from April 2026 and the amount qualifying for 100% relief is now subject to a restriction.

Importantly, assets that are not required for the purposes of the business can potentially be treated as “excepted assets” and excluded from Business Relief.

Cash is not automatically an excepted asset. A business may have perfectly good commercial reasons for retaining substantial cash reserves. But where money is clearly surplus to the company’s requirements, Business Relief may not be available on that element of the company’s value.

Again, documenting why cash is being retained can be important.

Should you simply take the money out?

That is one possibility, but extracting cash personally does itself create tax liabilities.

For most owner-managed companies, surplus profits are commonly extracted as dividends. The shareholder then has personal funds available to spend or invest, but Income Tax is payable on the dividend.

The result is that £100,000 sitting inside a company does not translate into £100,000 available for the shareholder to invest personally.

This is why automatically paying out all surplus profits is not necessarily the answer either.

Investing through the company

Another possibility is for the company itself to invest some of its surplus funds.

This avoids the immediate personal tax charge that can arise from extracting the money first, meaning a larger amount of capital can initially be put to work.

But care is needed.

As investment activity grows, it may start to affect the company’s status as a trading company. Different investments also have different corporation tax consequences: interest, investment gains, property income and dividends are not necessarily taxed in the same way. Also, cash invested in term investments is clearly not available for the company’s trading purposes.

Most dividends received by UK companies are exempt from Corporation Tax, for example, whereas interest and many investment gains will normally fall within the corporation tax regime.

The investment strategy therefore needs to be considered alongside the company’s wider tax position rather than in isolation.

Would a separate company be better?

For companies accumulating substantial amounts of cash, it may sometimes be worth considering a wider group structure.

For example, a holding company can potentially receive dividends from a trading subsidiary without an immediate corporation tax charge in most circumstances. Funds can then potentially be retained or invested elsewhere within the corporate structure rather than building up inside the trading company itself.

There can also be commercial advantages to separating accumulated wealth from the day-to-day risks of the trading business.

However, it should be borne in mind that a holding company will be entitled to receive the sale proceeds of the trading company rather than individual shareholders directly, and for this and wider reasons, inserting a holding company or moving assets between companies requires careful tax planning. It should not be undertaken simply because the trading company’s bank balance has become large.

Don’t overlook pensions

For owner-directors, employer pension contributions can also be an extremely tax-efficient use of company funds.

Subject to the relevant conditions and pension allowances, a company can make contributions directly to a director’s pension. Where the contribution is incurred wholly and exclusively for the purposes of the trade, the company can generally obtain corporation tax relief.

This can allow funds to move from the company into the director’s pension without first being paid as salary or dividends.

Pension contributions will not be appropriate in every case, particularly where the owner needs access to the money, but they should normally form part of the discussion when deciding what to do with accumulated company profits.

Have a plan for surplus cash

The key point is that cash accumulation should be deliberate rather than accidental.

If your company has £500,000 sitting in the bank because it expects to spend £400,000 on new premises or an acquisition next year, that is very different from £500,000 which has simply accumulated over several years with no intended business use.

Business owners should periodically consider and document:

how much working capital the business genuinely requires;
whether significant expenditure or acquisitions are planned;
whether surplus funds should be extracted personally;
whether company pension contributions are appropriate;
whether some funds should be invested;
whether a holding company or separate investment structure should be considered; and
how accumulated cash could affect a future business sale or Inheritance Tax planning.

These decisions are best made before a large cash balance becomes a tax or commercial problem.

At RJP, we can review the level of cash and investments held within your company and advise on the most tax-efficient options, taking into account your plans for the business and your own longer-term objectives.

If your company has accumulated significant cash reserves and you are unsure what to do with them, please speak to us before extracting or investing the funds.