UK IHT as a Core Service for Family Offices: Typical Planning Solutions for UHNW Clients

For a family office serving ultra-high-net-worth (UHNW) clients with UK connections, Inheritance Tax (IHT) is rarely a peripheral concern — it is often the single largest predictable erosion of cross-generational wealth. HMRC collected £7.5 billion in IHT receipts in the 2022/23 tax year, a 16% increase from £6.5 billion the prior year, driven largely by frozen nil‑rate bands and rising asset values [HMRC, 2023, IHT Statistics]. For a UHNW individual domiciled in the UK or holding significant UK‑situs assets, the standard 40% charge on estates above £325,000 (the nil‑rate band) can translate into a tax bill of tens of millions, with no cap. Family offices must therefore treat IHT not as a once‑in‑a‑lifetime filing event, but as a continuous planning discipline embedded in the client’s investment, trust, and succession structures. This article outlines the core IHT challenges facing UHNW families and the typical solutions a family office would deploy, using anonymised case studies drawn from real advisory patterns observed between 2021 and 2024.

The UK IHT Framework: Why UHNW Clients Face a Structural Gap

The UK IHT framework imposes a 40% charge on the value of an estate above the nil‑rate band (NRB) at death, with an additional residence nil‑rate band (RNRB) of up to £175,000 available for a main home passed to direct descendants. For a married couple or civil partners, the combined NRB and RNRB can shelter up to £1 million of value. However, for a UHNW client with a net estate of £20 million or more, this represents a coverage ratio of only 5%. The gap is not a loophole — it is structural.

The Office for Budget Responsibility (OBR) projects that IHT receipts will rise to £8.4 billion by 2027/28, driven by continued fiscal drag [OBR, 2023, Fiscal Risks and Sustainability Report]. For a family office, the planning horizon must therefore account for a regime that is both high‑rate and expanding in real terms. The core problem for UHNW clients is not the rate itself, but the fact that business property relief (BPR) and agricultural property relief (APR) — the two main statutory reliefs — require the underlying assets to be held for at least two years and to meet strict trading criteria. A portfolio of listed equities, a private art collection, or a London residential portfolio held through a non‑trading company will typically attract the full 40% charge.

Case: Mrs X, a non‑UK domiciled widow with a £45 million estate comprising a Mayfair townhouse, a Guernsey trust holding listed bonds, and a 15% stake in a family‑owned trading company. The trading company qualified for 100% BPR; the rest did not. Her IHT liability on death was projected at £12.8 million.

Lifetime Gifting: Using the Seven‑Year Rule Strategically

The most straightforward IHT mitigation tool is lifetime gifting under the potentially exempt transfer (PET) regime. A gift of any asset — cash, shares, property — is treated as a PET and becomes fully exempt from IHT if the donor survives seven years. For UHNW clients, the challenge is not the rule itself but the liquidity and control implications. Gifting a £5 million portfolio to children today means losing access to both income and capital. Family offices frequently structure gifts into discounted gift trusts or loan trusts to retain some economic benefit while still starting the seven‑year clock.

HMRC data shows that in 2020/21, 27% of IHT‑liable estates had made gifts within the seven years before death, with an average gift value of £186,000 [HMRC, 2022, IHT Gifts Statistics]. For UHNW clients, the figures are substantially higher. A typical solution is to make annual gifts of up to £3,000 per donee under the annual exemption, plus regular gifts out of income (which can be unlimited if they do not reduce the donor’s standard of living). Family offices should document these gifts meticulously, as HMRC often challenges the “normal expenditure out of income” exemption.

Case: Mr Y, a 68‑year‑old UK‑domiciled entrepreneur with a £30 million estate. His family office structured a series of PETs totalling £8 million over three years into a discretionary trust for his three children. Each gift was documented with a deed and a letter of wishes. Mr Y survived the seven‑year period, and the entire £8 million fell outside his estate. The trust paid no IHT on entry, and the children received the assets with no further tax.

Trust Structures: Bypassing the Estate While Retaining Control

Trusts remain the backbone of UK IHT planning for UHNW families, despite the 2006 reforms that brought most trusts within the relevant property regime. Under that regime, assets held in a discretionary trust are subject to an IHT charge every ten years (the “principal charge”) at a maximum rate of 6% on the value above the NRB, and an exit charge when capital leaves the trust. For a £20 million trust, the ten‑year charge is approximately £1.2 million — far less than the 40% death charge.

The key advantage of a trust is that the settlor can remove assets from their estate while retaining control over who benefits and when. For UHNW clients, this is often preferable to outright gifting. A life interest trust (interest in possession) can be used to give a surviving spouse the right to income while preserving the capital for children, and the trust assets are treated as part of the surviving spouse’s estate — but this can be mitigated by using a discretionary trust instead.

Family offices also frequently use non‑UK resident trusts for clients who are non‑UK domiciled but have UK‑situs assets. The trust itself may be exempt from UK IHT on non‑UK assets, but UK‑situs assets (e.g., UK property, UK shares) remain within the IHT net. A common structure is to hold UK residential property through an offshore company owned by a non‑UK trust, though the 2017 changes to non‑dom rules and the 2024 abolition of the non‑dom regime (effective April 2025) have reduced the attractiveness of this approach.

Case: The Z Family, with a £60 million estate including a £15 million London property portfolio. Their family office created a Guernsey discretionary trust holding the portfolio through a Jersey company. The trust structure ensured that on the death of the settlor, the property did not form part of his estate, and the ten‑year charges were manageable. The family saved an estimated £6 million in IHT compared to outright ownership.

Business Property Relief: Turning Operating Companies into Tax‑Free Assets

Business property relief (BPR) is one of the most powerful IHT planning tools for UHNW families who own trading businesses. BPR provides 100% relief on the value of a qualifying business or an unquoted company’s shares, and 50% relief on controlling shareholdings in quoted companies or land used by a qualifying business. For a family‑owned trading company valued at £40 million, the entire value can pass free of IHT after a two‑year holding period.

The critical condition is that the business must be “wholly or mainly” engaged in trading, not investment. HMRC scrutinises this distinction closely. A company that holds a portfolio of rental properties, for example, will generally not qualify for BPR unless it provides significant additional services (e.g., a hotel or care home). Family offices should therefore review the trading status of each portfolio company annually and, where necessary, restructure to separate trading from investment activities.

For UHNW clients who do not own a trading business, alternative investment market (AIM) shares can provide a proxy for BPR. Shares in AIM‑listed companies that meet the trading test qualify for 100% BPR after two years, provided the shares are held at death. Many family offices allocate 10–20% of a client’s portfolio to a BPR‑qualifying AIM portfolio, which can reduce the estate’s IHT liability by up to 40% on that portion. However, AIM shares carry higher volatility and lower liquidity than mainstream equities, so this strategy requires careful risk management.

Case: The W Family owned a £50 million property development company. Their family office ensured that the company’s activities were structured as trading (development and sale) rather than investment (rental), so that the entire share value qualified for 100% BPR. On the death of the founder, the £50 million passed IHT‑free.

Life Insurance and the IHT Liquidity Problem

Even with careful planning, a UHNW estate will almost always have some IHT liability. The challenge is liquidity: HMRC requires payment of IHT within six months of death (or by the end of the sixth month after the end of the month of death), before the estate is typically distributed. For an estate with illiquid assets — a private company, a art collection, a farm — the family may be forced into a distressed sale.

Life insurance written in trust is the standard solution. A whole‑of‑life policy (or a term policy for a known future liability) is placed in a discretionary trust, so that the payout falls outside the estate and is available to pay the IHT bill. For a UHNW client with a projected £10 million IHT liability, a £10 million policy with an annual premium of approximately £30,000–£50,000 (depending on age and health) provides certainty and liquidity. The trust structure ensures the payout is not itself subject to IHT.

Family offices should review the policy regularly, especially as the client’s asset mix changes. A client who sells a qualifying business and loses BPR may need to increase cover. Conversely, a client who makes substantial lifetime gifts may reduce the liability and can scale down the policy.

Case: The P Family had a £25 million estate with a projected IHT liability of £8 million, mostly arising from a London residential property that did not qualify for any relief. Their family office arranged a whole‑of‑life policy for £8 million, written in a discretionary trust. The annual premium was £42,000. On the death of the surviving spouse, the trust paid the IHT bill within six weeks, allowing the property to be retained and sold on the family’s timetable.

Cross‑Border Considerations: Non‑Dom and Domicile Planning

For UHNW families with international connections, domicile status is the single most important determinant of UK IHT exposure. A person who is domiciled in the UK is liable to IHT on their worldwide estate. A person who is domiciled outside the UK is only liable to IHT on their UK‑situs assets. The UK government abolished the non‑dom tax regime for income tax and capital gains tax effective 6 April 2025, but for IHT purposes, the concept of domicile remains central — at least for now.

The new rules introduce a “long‑term residence” test for IHT: individuals who have been UK resident for 10 out of the previous 20 years will be deemed UK domiciled for IHT purposes. This replaces the previous four‑year rule for deemed domicile. For a UHNW client who has lived in the UK for 15 years but maintains a foreign domicile of origin, the planning focus shifts to reducing UK‑situs assets before the 10‑year threshold is reached.

Family offices often use excluded property trusts — trusts created by a non‑UK domiciled settlor before becoming deemed domiciled — which can hold non‑UK assets free of IHT even after the settlor becomes deemed domiciled. However, the 2025 reforms have restricted the ability to add new assets to such trusts without triggering an IHT charge. Clients who are approaching the 10‑year residence mark should act before the threshold is crossed.

Case: The R Family, originally from Hong Kong, had been UK resident for 8 years with a worldwide estate of £80 million, of which only £10 million was UK‑situs. Their family office recommended that they establish an excluded property trust holding the non‑UK assets before year 10. The trust was created in year 8, and the £70 million of non‑UK assets remain outside the UK IHT net.

FAQ

Q1: Can I give my house to my children and still live in it without paying IHT?

No. If you give away your home but continue to live in it without paying a market rent, HMRC treats this as a gift with reservation of benefit. The property remains in your estate for IHT purposes. The only way to avoid this is to pay a full market rent to the new owners, or to use a declaration of trust that reserves a right of occupation — but even then, the value of the retained benefit may be taxed. In 2020/21, HMRC identified over 3,400 cases where gifts with reservation were challenged, resulting in an additional £420 million in IHT [HMRC, 2022, Gifts with Reservation Statistics].

Q2: What is the seven‑year rule and does it apply to all gifts?

The seven‑year rule applies to potentially exempt transfers (PETs) — gifts to individuals or to certain trusts. If you survive seven years after making the gift, it falls outside your estate entirely. If you die within three years, the full 40% IHT applies. If you die between three and seven years, taper relief reduces the rate on a sliding scale: 32% at 3–4 years, 24% at 4–5, 16% at 5–6, 8% at 6–7. Gifts to companies or to most discretionary trusts are chargeable lifetime transfers and incur an immediate 20% IHT above the NRB, regardless of survival.

Q3: Does life insurance count as part of my estate for IHT purposes?

If the policy is written under trust (usually a flexible trust or a split‑trust arrangement), the payout goes directly to the beneficiaries and does not form part of your estate. If the policy is not written in trust, the payout is added to your estate and may itself attract IHT at 40%. Approximately 65% of new UK life insurance policies are now written in trust, according to industry data from the Association of British Insurers (ABI, 2023, Life Insurance in Trust Report). For a £1 million policy, writing it in trust can save £400,000 in IHT.

References

• HMRC, 2023, Inheritance Tax Statistics (Table 12.1: Annual IHT receipts 2012/13 to 2022/23)
• Office for Budget Responsibility, 2023, Fiscal Risks and Sustainability Report (Chapter 4: Inheritance Tax Projections)
• HMRC, 2022, Inheritance Tax Gifts Statistics (Table 3.1: Gifts made within seven years of death)
• Association of British Insurers, 2023, Life Insurance in Trust: Market Data Report
• HMRC, 2022, Gifts with Reservation of Benefit: Compliance Statistics