Business Relief: the two-year IHT shelter — and why it's genuinely high risk

Every strategy in this series so far involves a trade-off you can feel: spending means less to leave, gifting means letting go, insurance means premiums. Business Relief (BR) appears, at first glance, to offer IHT efficiency with none of those costs — keep the money in your own name, keep access to it, and after just two years it can pass free of inheritance tax.

When something in tax planning sounds that good, the cost is hiding somewhere. With BR, it's hiding in the word "business": the relief only applies to genuinely risky assets, and government has recently made the relief itself meaningfully less generous.

What Business Relief is

BR is a long-standing relief originally designed so that family businesses and farms don't have to be broken up to pay IHT on the owner's death. It applies to qualifying business assets held for at least two years at death, including:

• An interest in a trading business (a sole trade, or a share in a partnership)
• Shares in an unquoted trading company — including your own family company
• Shares listed on AIM (treated as unquoted for this purpose)
• Land, buildings or machinery you own personally but which your trading company or partnership uses (at the lower 50% level)

The crucial word is trading. Companies that wholly or mainly deal in investments, securities or land — including ordinary buy-to-let portfolios — do not qualify. Mixed businesses are assessed on whether they are mainly trading, and businesses carrying large "excepted assets" can see the relief restricted.

The new rules: what changed from April 2026

For decades, qualifying assets got 100% relief without limit. That era is over. From 6 April 2026:

• Each individual has a £1 million allowance for 100% relief, shared across Business Relief and Agricultural Relief assets combined.
• Qualifying assets above £1 million receive 50% relief — an effective IHT rate of 20% on the excess.
• AIM-listed shares are excluded from the 100% band entirely: they receive 50% relief (an effective 20% IHT rate) from the first pound.
• Unlike the nil rate band, the £1 million allowance is not transferable between spouses — making ownership structure between couples, and will drafting, newly important for business-owning families.

Two consequences follow. First, for owners of substantial businesses, "the business is exempt" is no longer automatically true. Second, the change is a loud reminder of legislative risk: a relief that was cut once can be cut again.

Route 1: BR for business owners

If you own a trading business, BR is likely the cornerstone of your estate plan — and the planning is mostly about not accidentally losing it:

• Watch the excepted assets. Years of retained profits sitting as surplus cash can dilute the relief.
• Mind the binding contract trap. A shareholders' agreement that obliges your estate to sell your shares on death can destroy BR entirely — cross-option agreements achieve the same commercial outcome while preserving the relief.
• Don't lose it at retirement. Sell the business for cash and the relief is gone (though reinvestment into qualifying assets within three years can restore the position).
• Above £1 million, the 20% effective rate on the excess now needs a funding plan — often life insurance written in trust.

Route 2: BR portfolios for investors

Investment managers offer portfolios of BR-qualifying companies — unquoted trading businesses or AIM shares — marketed squarely at older investors with IHT concerns. The pitch is real: money stays in your name, accessible if circumstances change, and after two years it qualifies for relief. Compare that with the seven-year clock on gifts, and the appeal to someone in their 80s, or in poor health, is obvious.

Now the other side of the ledger, with the emphasis it deserves.

These are high-risk investments. BR portfolios hold small, often very small, companies. Smaller companies fail more often than large ones; their shares swing more violently; and the underlying investment can fall in value by more than the 40% tax the strategy is designed to save. It is entirely possible to end up worse off than doing nothing.

They are illiquid. Unquoted shares have no ready market; even AIM shares can trade thinly. "Access to your money" depends on the manager finding a buyer.

The relief is assessed at death, not purchase. The companies must still qualify when you die — a holding that drifts from trading to investment activity can silently lose relief.

Costs are high. Initial and annual charges on BR portfolios run well above mainstream funds.

The rules just got worse, and could again. Post-April 2026, AIM portfolios save at most 20% IHT — halving the headline benefit against the same investment risk.

Where BR genuinely fits

After all those warnings, BR investing retains a legitimate niche: typically an older investor, or one in poor health, with a clear IHT liability, who has already used the safer strategies, cannot wait seven years, will not or cannot give capital away, or specifically needs the two-year speed — and who can truly afford to lose a meaningful part of the capital invested. As a modest, eyes-open slice of a wider plan alongside spending, gifting and insurance, it can earn its place.

For business owners, meanwhile, BR isn't optional — it's the frame around which the rest of the estate plan is built, and the new £1 million allowance makes professional review more necessary than it has been in a generation.

This article is for general education only and isn't personal advice or a recommendation to invest. Business Relief investments place your capital at risk, may be hard to sell, and tax treatment depends on individual circumstances.

Related in this series

• The four IHT strategies — hub overview
• Spending it: the IHT strategy hiding in plain sight
• Giving it away: gifts, the seven-year rule and trusts
• Insuring the liability: whole-of-life and gift cover