Client case study
Business Relief and IHT: A £5.5m Shareholding Case Study
14 October 2026For business owners with valuable company shares, Business Relief can play a major role in inheritance tax planning. However, changes to the rules mean that owners need to understand how much of their business interests may qualify for relief and what could remain exposed to Inheritance Tax (IHT).
Castle Stonebridge Financial Planning worked with a business owner concerned about the potential IHT liability associated with his shareholding. By reviewing the value of his interest, the available Business Relief and his wider financial position, we helped him understand the potential exposure and consider options for planning ahead.
The situation: a valuable business shareholding
The client owned a 50% stake in a business valued at £11 million. His shareholding was therefore worth £5.5 million, representing a substantial part of his personal financial position.
He was concerned about how much IHT could become payable on his shares and how that liability might affect the wealth he ultimately passed on to his family. The first step was to assess how Business Relief could apply to his qualifying business interest under the rules in force from 6 April 2026.
Understanding Business Relief and IHT
Business Relief can reduce the value of qualifying business property when calculating IHT. However, the extent of the relief depends on the type of asset, whether the qualifying conditions are met and the available allowance.
Under the rules applying from 6 April 2026, the first £2.5 million of qualifying business and agricultural property can receive 100% relief, subject to the rules and the available allowance. Qualifying value above that allowance generally receives 50% relief. The allowance is shared across qualifying business and agricultural property, and other factors, including qualifying lifetime gifts and a transferable allowance from a deceased spouse or civil partner, may affect the calculation.
We explained how these rules could apply to the client's shareholding and incorporated the potential IHT exposure into his overall financial position. This helped him see why Business Relief was important, while recognising that the final position would depend on the qualifying status and valuation of the assets.
The government's Business Relief guidance for Inheritance Tax explains the relief and the process for claiming it.
Applying Business Relief to the shareholding
The following table illustrates how the relief could apply to the client's £5.5 million shareholding, assuming the entire interest qualifies and the full allowance is available for it.
Shareholding value | Relief applied | Value remaining chargeable to IHT |
|---|---|---|
First £2.5 million | 100% relief | £0 |
Remaining £3 million | 50% relief | £1.5 million |
Total: £5.5 million | £4 million relieved | £1.5 million |
Key figure: On these assumptions, £1.5 million of the shareholding's value remains exposed to IHT before considering other allowances, exemptions, liabilities and the wider estate.
To illustrate the potential scale of the issue, applying a hypothetical 40% IHT rate to the shareholding alone would produce the following comparison:
Illustration | Potential IHT on the shareholding |
|---|---|
If no Business Relief applied | £2.2 million |
With the illustrated Business Relief | £600,000 |
Difference in this simplified comparison | £1.6 million |
These figures are illustrative, not the client's actual IHT liability or a guaranteed tax saving. IHT is calculated with reference to the wider estate and relevant transfers, allowances and exemptions. The calculation also assumes the full £2.5 million allowance is available and that the business interest qualifies for the relief shown.
HMRC's Inheritance Tax Manual guidance on Business Relief provides further detail on qualifying business interests and the applicable rules.
Looking beyond Business Relief
Business Relief was central to the review, but it was not the only consideration. We assessed the client's wider financial position to understand how his business interest fitted alongside his other assets, future plans and the amount he wanted to pass on to his family.
We presented options for further consideration, including lifetime gifting, investment planning and whole of life protection. Each option has different implications and would need to be assessed against the client's objectives, affordability and circumstances.
Lifetime gifting may reduce the value of an estate over time, but the IHT treatment depends on the type of gift, how long the person survives after making it and the rules applying to the assets. Gifts of business property can also interact with Business Relief rules, so they require careful planning.
Investment planning can help ensure that the client's wider assets are structured with his future needs and estate in mind. This does not automatically reduce IHT, and investment risk, access to capital and tax treatment all need to be considered.
Whole of life protection was also presented as an option to help provide funds towards a future IHT bill. The suitability of a policy depends on factors such as premiums, health, underwriting and how the policy is structured. It would need to be assessed as part of the overall plan rather than treated as a guaranteed solution.
Business Relief and IHT: common questions
How does Business Relief work?
Business Relief reduces the value of qualifying business property when calculating IHT. The rate depends on the asset and the applicable rules. Eligibility conditions and the available allowance must be checked.
Does a business shareholding automatically qualify?
No. The type of business, the nature of the shares, ownership period and other conditions matter. A valuation alone does not establish eligibility.
How does the £2.5 million allowance apply?
From 6 April 2026, the first £2.5 million of qualifying business and agricultural property can receive 100% relief, subject to the rules and the available allowance. Qualifying value above the allowance generally receives 50% relief.
Can lifetime gifts reduce IHT?
Potentially. Some gifts may fall outside the estate if the relevant conditions are met, but the outcome depends on the type of gift, the timing and the donor's circumstances. Business assets can involve additional rules, so advice should be taken before acting.
Can whole of life protection cover an IHT bill?
It may provide funds to help meet an IHT liability, depending on the policy and its structure. It does not itself remove the tax liability, and premiums must remain affordable.
Taking a considered approach to IHT planning
This case highlights why business owners should understand both the value of their shareholdings and the reliefs that may be available. Business Relief can make a substantial difference to the amount of business property exposed to IHT, but it should be assessed alongside the owner's wider financial position and future plans.
At Castle Stonebridge Financial Planning, we help clients review their circumstances, understand their options and consider a plan suited to their needs. To discuss your own position, contact Independent Financial Advisers at Castle Stonebridge Financial Planning to arrange a consultation.
Disclaimer* The benefits to the treatment of tax will depend on your individual circumstances and may be subject to change in future. The value of investments and the income they produce can fall as well as rise. You may get back less than you invested.