Business Relief Qualifying Shares & Assets
Investments in unlisted or qualifying AIM shares that can qualify for Business Relief after 2 years: 100% on the first £2.5 million of qualifying assets per estate and 50% above that, for deaths from 6 April 2026. A key estate planning tool for business owners with significant wealth.
By Omair SaoLast reviewed — rates for the 2026/27 tax year. See how we check our figures.
How It Works
You invest in unlisted or qualifying AIM shares outside an ISA. After 2 years, unlisted trading company shares qualify for 100% Business Relief within the £2.5 million allowance (50% above it) and AIM shares for 50%, reducing the IHT due on death. Income and gains are taxed normally but the IHT saving can be substantial.
Tax Treatment
Outside an ISA, dividends and gains are taxable normally. However, qualifying unlisted shares held for 2 years attract 100% Business Relief on the first £2.5 million of qualifying assets per estate and 50% above that (deaths from 6 April 2026); AIM-listed shares get 50%.
Tax Advantages
- 100% Business Relief on the first £2.5 million per estate after 2 years, 50% above that
- No limit on qualifying amount (unlike ISAs)
- Retain full ownership and control
- Can combine with ISA holdings for comprehensive IHT planning
Who Is This Suitable For?
High-net-worth individuals who have exceeded ISA allowances and want to reduce IHT liability. Often used alongside an AIM ISA.
Worked Example: £3.5 million of unlisted trading company shares on death
- 1You die owning shares in your unlisted trading company worth £3,500,000, held for well over two years.
- 2The first £2,500,000 gets 100% Business Relief under the allowance for deaths from 6 April 2026; the remaining £1,000,000 gets 50% relief, so £500,000 is counted in your estate.
- 3At the 40% IHT rate that is £200,000 of tax, against £1,400,000 if no relief applied.
- 4Unused allowance from a spouse or civil partner who died before you can be transferred, raising the 100% band to as much as £5,000,000.
Result: Business Relief still removes most of the tax on a large trading company, but the £2.5 million cap means bigger estates need to plan for a residual bill, payable in instalments over ten years.
Illustrative figures using the 2026/27 rules on this page, last checked on 25 September 2026.
Advantages and Drawbacks
Advantages
- Relief can apply to your own shares, to business assets you own personally and use in the business, and to unlisted trading companies you invest in.
- Nothing has to be given away; you keep running and drawing from the business.
- Interest-free instalments over ten years on the remaining tax ease pressure to sell quickly.
Drawbacks
- A company that mainly holds investments, surplus cash or property to rent can lose relief entirely.
- Schemes marketed for Business Relief often carry high charges and hold unlisted assets that are hard to sell.
- HMRC examines claims after death, when you are no longer around to explain how the business operated.
Notes for Limited Company Owners
Check whether your company passes the trading test: substantial investment activity, surplus cash or a rental property inside it can put relief at risk for the whole shareholding. Consider a cross-option agreement rather than a binding buy-sell contract with fellow shareholders, and remember each spouse has their own £2.5 million allowance.
Common Mistakes
- Letting large cash balances build up in the company for no trading purpose, which HMRC can treat as an excepted asset.
- Selling the business and holding the cash proceeds, which brings the full value back into the estate immediately.
- Signing a binding contract for the sale of your shares on death, which can convert them into a right to cash and forfeit relief.
- Assuming the allowance works per business rather than per estate — the £2.5 million is shared across all your qualifying business and agricultural property.
Who Should Avoid It
People whose estates are comfortably below the nil-rate band have no IHT to relieve, and anyone buying unlisted shares purely for the relief should weigh the investment risk first.
Official Sources
The rules on this page come from the following official pages and were checked on 25 September 2026. Read how we check our figures.
Related Calculators
Frequently Asked Questions
What qualifies for Business Relief?
Shares in unlisted trading companies, AIM-listed trading companies, and business assets used in a qualifying trade. Investment companies and property rental businesses generally do not qualify.
Do my own company shares qualify?
Yes, if your company is a qualifying trading company. Your shares typically qualify for Business Relief after 2 years: 100% within the £2.5 million allowance and 50% above it.
Can HMRC challenge claims?
Yes. HMRC assesses qualification on death and may challenge if the company has significant investment activities.