Inheritance tax in the UK is simple in theory

40% on estates above the available allowances

But in practice?

It’s one of the most planned-for taxes in the system

And Business Property Relief (BPR) sits right at the centre of modern IHT strategy

Originally designed to stop family businesses from being broken up on death, BPR has evolved into something more  –  a legitimate, structured way for investors to mitigate inheritance tax while retaining control of their capital

NMTBP explains more

What BPR does  

If you hold qualifying business assets for at least two years, and still hold them at death, those assets may qualify for:

• 100% relief from inheritance tax, or
• 50% relief in some cases, from April 2026

That means a potential reduction of a 40% tax charge to zero on those assets

Not deferral. Not a reduction over time. Full relief

But only if strict conditions are met

The core requirement: trading businesses

BPR applies to trading businesses.

It does not generally apply to businesses mainly engaged in:

• Property investment
• Holding investments
• Dealing in securities

This is critical

A company collecting rent from residential properties? Usually no relief

A company actively running a hotel, care home, manufacturing operation, or technology business? Potentially yes

HMRC looks at the underlying activity. Substance matters

The two-year clock

Unlike lifetime gifting  –  which typically requires surviving seven years  –  BPR only requires a two-year holding period

That shorter timeframe is one reason it’s become so popular in later-life planning

But remember: The asset must still qualify at the date of death. If circumstances change, relief can be lost

How BPR is used today

Originally, BPR was mainly relevant to people who already owned private businesses

Now, specialist investment managers have built portfolios specifically designed to qualify

Broadly, there are two main routes:

⃣ AIM-Based BPR Portfolios

Many strategies focus on companies listed on the Alternative Investment Market (AIM), part of the London Stock Exchange

AIM shares can qualify for BPR  –  provided the company is genuinely trading and not primarily investment-based

This has led to the growth of specialist discretionary portfolios such as:

• Octopus Investments Business Relief Service
• Downing LLP inheritance tax services
• Foresight Group Business Relief solutions

These services typically:

• Invest in a basket of AIM-listed trading companies
• Aim to maintain BPR qualification
• Require a minimum two-year holding period
• Allow investors to retain access to capital (subject to liquidity)

They aren’t passive index funds. They’re actively managed portfolios targeting BPR eligibility

Important development

From April 2026, BPR on AIM shares is scheduled to reduce from 100% to 50% relief on assets over £2.5 million. These assets will now be taxed at 20% IHT. That significantly alters planning calculations and makes manager selection and structuring even more important

⃣ Unquoted company portfolios

The second approach involves investing in unquoted trading companies  –  the traditional heartland of BPR

Some managers structure portfolios that invest directly into private businesses expected to qualify for 100% relief

These tend to:

• Be less liquid
• Carry a higher business risk
• Offer closer alignment to the original spirit of BPR

But they may retain full 100% relief (subject to legislation and qualification). This route often appeals to investors comfortable with private-market exposure

Why BPR is favoured by many

Three words: control and flexibility.

Compared with gifting:

• You retain ownership
• You retain income
• You can usually sell (subject to liquidity)
• There’s no need to survive seven years

Compared with trusts:

• Structures are simpler
• Administration is lighter
• Capital is not irrevocably given away

For older clients who want to reduce IHT but are unwilling to surrender access to wealth, this flexibility is powerful

But be VERY clear about the risks

BPR investing is not low risk.

These portfolios typically invest in:

• Smaller companies
• AIM-listed shares
• Unquoted private businesses

That means:

• Higher volatility
• Potential capital loss
• Liquidity constraints
• Legislative risk

You are exchanging tax certainty for investment risk

Avoiding 40% inheritance tax is attractive

But a falling portfolio value can undermine the benefit

What doesn’t qualify

Standard index funds, ETFs, and mainstream unit trusts do not qualify

Owning an FTSE 100 tracker does not give you BPR

Why? Because large listed companies on the main market do not meet the unquoted/AIM criteria, and many funds include non-qualifying investment businesses

This is specialist territory

The political question

BPR is not a loophole. It was intentionally created to protect trading businesses

But as more wealth flows into AIM portfolios for tax reasons, scrutiny increases

Recent changes to AIM relief show that governments can and will adjust the rules

Any BPR strategy must factor in legislative risk over the long term

The bottom line

Business Property Relief remains one of the most powerful inheritance tax planning tools available in the UK

It can reduce a 40% IHT charge to zero (or 50%) on qualifying assets after just two years

But it requires:

• Genuine trading exposure
• Careful portfolio construction
• Ongoing monitoring
• Professional advice

It’s NOT a free lunch.

It IS a trade:

Market risk and legislative risk in exchange for inheritance tax mitigation

For the right investor, at the right stage of life, that trade can make sense

But it should always be made with eyes wide open