Business Relief changes 2026: what family business owners need to know

How has Business Relief changed in 2026

Until now, Business Relief sheltered qualifying trading business assets from IHT entirely. From April 2026, full relief is capped at £2.5m per individual, or £5m per couple with some transferability between spouses. Anything above the cap drops to 50% relief.

Take a £10m business owned by a couple who have structured ownership to use both spousal allowances. The first £5m qualifies for full relief, and the remaining £5m gets the half-rate relief, which produces an effective 20% charge on the excess (half the standard 40% rate). That's up to a £1m bill where previously there would have been none.

Who is exposed by the 2026 Business Relief changes?

Under the new cap, the more valuable the trading business, the greater the exposure, as the benefits of the Business Relief allowance get diluted. The most significantly impacted are higher value privately owned businesses, especially those that are illiquid.

This makes the value of your business a much more important consideration than it has been previously. Understanding how HMRC will approach this is now essential, particularly when preparing for Business Relief changes 2026.

These changes also affect lifetime planning. The same £2.5m allowance, albeit not transferable between spouses in lifetime, applies when settling business assets into trust, which makes the timing and structure of your financial planning more important than ever.

Why the problem isn't just the tax rate

The real challenge for many families won't just be the rate itself, but where the money to pay it comes from. The IHT bill falls on the estate, but the money to pay it is often tied up in the business. Pulling cash out of a company to pay the bill usually triggers sizeable additional tax charges, which compounds the effective rate of tax suffered. Businesses which are running lean can be put under genuine operational pressure, and other shareholders and family members can really feel this too.

For a real-world example, consider a manufacturing business worth around £100m with a significant plant on valuable land. It generates profits of only £3 to £4m per year but the 100% shareholder faces a potential IHT exposure in the region of £19m. A charge like this cannot be met from trading profits or estate liquidity without serious planning, especially after the Business Relief changes 2026 take effect.

The spousal trap

Many families assume they automatically have £5m of combined relief between them. In practice, the transferable allowance only passes on what the first spouse didn't use. If one spouse owns all the shares and leaves them to the children on first death, the other spouse's £2.5m allowance is effectively wasted (unless they subsequently invested in other qualifying assets), because they had no shares to apply it to. The combined £5m relief only works if the wills and share ownership are structured to use both allowances. 

Reviewing wills and ownership structures following the 2026 Business Relief changes is therefore critical for family businesses.

The importance of lifetime planning

There are a variety of ways to handle these changes, and we'll explore many of them through this series. Gifting shares during lifetime, settling assets into trust, and restructuring shareholdings are all routes worth considering, each with its own tax and control implications. The right option will depend on the business and the family, but there are a number of tools available to help navigate the new rules.

Effective planning ahead of the Business Relief changes for family business owners can significantly reduce exposure and protect control.

What your family-owned business should do following the Business Relief changes 2026

Doing nothing is itself a decision, and often the most costly one. The practical starting point is to get in touch with an advisor, who can help you to:

• Understand the value of your business and your ability to cover the liability under the Business Relief changes 2026
• Identify options for reducing the value that sits in your estate
• Think through your objectives and how to involve your family
• Plan how decision-making and ownership will pass to the next generation
• Manage your IHT exposure over the long term, as your business and family circumstances change