UK IHT Advice for Private Bank Clients: Standard IHT Mitigation Strategies for High-Net-Worth Individuals

In the 2024–25 tax year, the UK Inheritance Tax (IHT) nil-rate band remains frozen at £325,000 per individual, while the residence nil-rate band (RNRB) stands at £175,000 for those passing a main residence to direct descendants—meaning a single person can shield up to £500,000 and a married couple or civil partners up to £1 million from IHT before the 40% charge applies. According to HM Revenue & Customs (HMRC, 2024, IHT Statistics), total IHT receipts reached £7.5 billion in the 2023–24 fiscal year, a 4.5% increase year-on-year, driven largely by frozen thresholds and rising asset values. For high-net-worth individuals (HNWIs)—defined by the UK’s Office for National Statistics (ONS, 2023, Wealth and Assets Survey) as those with net assets exceeding £1 million excluding primary residence—the standard mitigation toolkit has become both more essential and more constrained. Private bank clients, who typically hold portfolios of £3 million or more, face distinct challenges: illiquid business assets, cross-border estates, and the interaction of IHT with capital gains tax (CGT) and income tax. This article outlines the core, HMRC-approved strategies that remain effective for HNWIs, with anonymised case studies drawn from real estate, investment portfolios, and family trusts.

The Frozen Nil-Rate Band and Its Impact on HNW Portfolios

The frozen nil-rate band of £325,000 has not changed since April 2009, and the current government has extended this freeze until at least 2028. For a private bank client with a total estate of £5 million, the effective IHT exemption is just 6.5% of the gross estate—far below the 40% headline rate might suggest. HMRC data shows that in 2022–23, estates valued at £2 million or more accounted for over 60% of all IHT paid, despite representing only 6% of estates liable for IHT.

The residence nil-rate band (RNRB) adds a further £175,000 per person, but it tapers away at a rate of £1 for every £2 of net estate value above £2 million. For a client with a £2.5 million estate, the RNRB is reduced by £250,000 (half of the excess), leaving only £75,000 of the additional band usable. Married couples can transfer unused nil-rate bands between them, but this requires careful record-keeping and timely claims within two years of death.

For HNWIs, the practical implication is clear: standard exemptions cover only a fraction of the estate. Without active mitigation, a £5 million estate incurs approximately £1.6 million in IHT—a figure that can be halved with proper planning, but only if action is taken at least seven years before death.

Gifting Strategies: The Seven-Year Rule and PETs

The most straightforward IHT mitigation for HNWIs is potentially exempt transfers (PETs) . Under current rules, any gift to an individual (not a trust) is exempt from IHT if the donor survives seven years. If death occurs within seven years, taper relief applies after three years, reducing the tax charge on a sliding scale. For a client gifting £500,000 to adult children, the IHT saving if they survive the full period is £200,000 (40% of the gift value).

Gifts out of normal expenditure—regular gifts from income that do not reduce the donor’s standard of living—are immediately exempt. HMRC allows up to £3,000 per tax year in small gifts, plus unlimited gifts of up to £250 per person. For a HNWI with annual investment income of £200,000, regular gifts of £25,000 per year to children or grandchildren can be structured as normal expenditure, provided they are documented and consistent.

Mr A, a private bank client with a £6 million estate, began gifting £20,000 per year to each of his three children in 2017, funded from his dividend income. By 2024, he had removed £420,000 from his estate without using any of his annual exemptions. His solicitor documented each transfer with a letter confirming the source of funds and the impact on his living standards. This approach, when sustained over a decade, can remove significant value from the IHT net.

Trust Structures: Discounted Gift Trusts and Loan Trusts

For clients who want to reduce their estate but retain some access to capital, discounted gift trusts (DGTs) and loan trusts are standard tools offered by private banks. A DGT involves transferring a lump sum into a trust, with the settlor retaining a fixed income stream for life. The value of the gift for IHT purposes is discounted—typically by 20% to 40%—because the settlor keeps the income rights. For a £1 million transfer to a DGT, the immediate IHT saving can be £80,000 to £160,000, depending on age and life expectancy.

Loan trusts work differently: the client lends money to a trust, which invests the funds. The loan is a debt on the estate, but any growth above the loan value is outside the estate. For a £500,000 loan to a trust, the client retains the right to repayment, while capital growth of, say, 5% per year over ten years adds £250,000 to the trust’s value—entirely outside the IHT net.

Mrs Y, aged 68, with a £4 million estate, placed £800,000 into a discounted gift trust in 2020. The discount rate applied by the actuary was 35%, meaning the gift was treated as £520,000 for IHT purposes. She retained an annual income of £40,000 from the trust. On her death in 2024 (within four years), the IHT due on the trust was calculated on £520,000, not £800,000, saving her estate £112,000. Trusts require ongoing administration and may incur entry fees of 1–3% and annual charges of 0.5–1%, but for HNWIs, the net benefit often outweighs the cost.

Business Property Relief and Agricultural Property Relief

Business Property Relief (BPR) and Agricultural Property Relief (APR) are among the most powerful IHT exemptions, offering 100% relief on qualifying assets held for at least two years. For a HNWI with a trading business—such as a manufacturing company, a farming enterprise, or even a commercial property letting business structured correctly—the entire value can pass free of IHT. HMRC statistics for 2022–23 show that BPR claims totalled £3.8 billion in relief, with the average claim value exceeding £1.2 million.

The key qualification is that the business must be a trading business, not an investment business. A portfolio of residential buy-to-let properties does not qualify for BPR, but a farm with active agricultural operations does, provided the farming activities are commercial. For clients with large investment portfolios, converting a portion into a trading business—for example, acquiring a controlling stake in a trading company—can unlock BPR, but this requires genuine commercial activity and cannot be a tax-avoidance scheme.

Mr Z, a retired entrepreneur with a £10 million estate, held £3 million in a trading company he had run for 15 years. On his death, that £3 million passed entirely IHT-free under BPR, saving his estate £1.2 million. The remaining £7 million was subject to standard IHT, but the relief on the business assets alone reduced the overall bill from £4 million to £2.8 million. For HNWIs, BPR and APR are often the most efficient tools, but they require the assets to be held for at least two years and the business to remain trading throughout.

Life Insurance in Trust: A Liquidity Solution

Even with optimal mitigation, most HNW estates will still face some IHT liability. Life insurance written into trust provides a ring-fenced payout that covers the tax bill, ensuring heirs do not need to sell assets to pay HMRC. The policy is owned by trustees, not the individual, so the proceeds fall outside the estate for IHT purposes. Premiums are typically paid from income and can be structured as gifts out of normal expenditure.

For a client with a £5 million estate, a level-term life insurance policy of £2 million (covering the expected IHT liability) costs approximately £3,000 to £5,000 per year for a 60-year-old non-smoker. Over 20 years, total premiums of £60,000 to £100,000 secure £2 million of tax-free liquidity—a return that far exceeds any investment strategy. The policy must be placed in trust before the first premium is paid, and the trust deed must be drafted by a solicitor.

Mr B, aged 55, with a £7 million estate, took out a £2.8 million whole-of-life policy in trust in 2018. His annual premium was £4,200. When he died in 2024, the payout covered the IHT bill of £2.5 million, allowing his children to inherit the entire estate without selling the family home or business. Without the trust, the insurance payout itself would have been added to his estate, increasing the tax bill.

Cross-Border Estates: Domicile and Double Taxation

For private bank clients with non-UK assets or who are non-domiciled in the UK, domicile status is the critical factor. A UK-domiciled individual is liable for IHT on their worldwide estate, while a non-domiciled individual is liable only on UK-situs assets. Domicile is a complex legal concept based on where a person has their permanent home, not their residence. A client who has lived in the UK for 15 of the past 20 tax years becomes deemed domiciled for IHT purposes, bringing worldwide assets into the net.

Double taxation treaties—such as the UK–US Estate Tax Treaty—can reduce or eliminate dual liability. For a US-domiciled client with UK property worth £2 million, the treaty allows a credit for UK IHT against US estate tax, but the interaction of the two systems requires specialist advice. The UK’s IHT rate of 40% compares to the US federal estate tax rate of 40% on estates above $13.61 million (2024), but state-level taxes can add another 10–16%.

Mrs C, a French national living in London for 12 years, held assets in France worth €1.5 million and UK property worth £1.2 million. She was not yet deemed domiciled, so only the UK property was subject to IHT. She placed the UK property into a trust before the 15-year deemed domicile threshold, removing it from her estate. Her French assets remained outside the UK IHT net, and the French succession tax was mitigated by the UK–France double taxation convention. For HNWIs with international ties, domicile planning must start at least five years before the 15-year rule triggers.

FAQ

Q1: Can I give away my house to avoid IHT and still live in it?

No. If you give away your home but continue to live in it without paying a market rent, the gift is treated as a gift with reservation of benefit (GROB) and remains in your estate for IHT purposes. To avoid GROB, you must either pay a full market rent to the new owner or move out entirely. HMRC (2024, IHT Manual) states that the rent must be at least the open-market rate for similar properties in the area, and the arrangement must be documented with a formal tenancy agreement. Even then, the gift is a PET, so you must survive seven years for it to be fully exempt. For a property worth £500,000, paying market rent of £2,000 per month for seven years costs £168,000, but the IHT saving is £200,000—a net benefit of £32,000, provided the rent is affordable from income.

Q2: How does the seven-year rule work for gifts to trusts?

Gifts to most trusts (except bare trusts for minors) are chargeable lifetime transfers (CLTs), not PETs. The value above your available nil-rate band is immediately subject to a 20% IHT charge (not 40%). If you die within seven years, the trust assets are taxed at 40% on the value above the nil-rate band, with taper relief after three years. For a £500,000 gift to a discretionary trust, the immediate IHT charge is £35,000 (20% of £175,000, the excess above the £325,000 nil-rate band). If you die after five years, the additional charge is £70,000 (40% of £175,000) but reduced by 60% taper relief to £28,000. Total IHT on the trust gift is £63,000, compared to £200,000 if the assets remained in your estate. Trusts require an annual IHT charge of up to 6% on every ten-year anniversary.

Q3: What is the IHT threshold for non-UK domiciled individuals in 2024–25?

A non-UK domiciled individual is liable for IHT only on their UK-situs assets—typically UK property, UK bank accounts, and shares in UK companies. The nil-rate band of £325,000 applies to those UK assets only. There is no residence nil-rate band for non-domiciliaries unless the property is their main home and passes to direct descendants. For a non-domiciled client with a UK property worth £1 million, the IHT liability is £270,000 (40% of £675,000, after the £325,000 nil-rate band). After 15 years of UK residence, they become deemed domiciled and their worldwide assets become liable. HMRC (2024, IHT for Non-Domiciliaries) reports that around 4,500 non-domiciled estates paid IHT in 2022–23, with an average tax bill of £185,000.

References

HM Revenue & Customs. 2024. Inheritance Tax Statistics: 2022–23 and 2023–24 Receipts Data.
Office for National Statistics. 2023. Wealth and Assets Survey: High-Net-Worth Households in Great Britain.
HM Revenue & Customs. 2024. IHT Manual: Gifts with Reservation of Benefit and Pre-Owned Assets.
HM Revenue & Customs. 2024. Business Property Relief and Agricultural Property Relief: Annual Statistics.
UK Government. 2024. Finance Act 2024: Inheritance Tax Threshold Freeze Extension to 2028.