High-Net-Worth Estate Planning: Protecting Wealth and Family Assets

Understanding high-net-worth estate planning is essential for individuals and families whose wealth extends beyond straightforward savings and property. Business interests, investment portfolios, overseas assets, trusts, pensions and valuable personal possessions can all create additional legal, tax and succession considerations.

Effective estate planning is not simply about reducing Inheritance Tax. It is about protecting wealth, ensuring assets pass in accordance with your wishes, preparing for incapacity and giving your family clarity at a difficult time.

With careful, coordinated advice, you can create a plan that reflects your wider financial affairs, family circumstances and long-term objectives.

Our specialist Wills, Trusts and Tax solicitors advise individuals and families on protecting, managing and transferring complex wealth.

This guide explains the key issues high-net-worth individuals should consider, from Wills and trusts to business succession, property portfolios, pensions, lifetime gifting and the management of complex or international assets.

What is a high-net-worth estate?

A high-net-worth estate is usually one where the total value exceeds the available tax-free allowances. Everyone has a basic tax-free allowance of £325,000 (known as the Nil Rate Band (“NRB”)) and for homeowners, this may increase to £500,000 if their main residence passes to direct descendants, this additional allowance is known as the Residential Nil Rate Band (“RNRB”).

Assets passing to a spouse or civil partner are exempt from Inheritance Tax (“IHT”), and any unused allowances can transfer to the surviving spouse. As a result, a married couple may be able to leave up to £1 million tax-free.

Any value above the available allowances is taxed at 40%.

For high-net-worth estates, this can create a substantial liability. For example, a £2 million estate with a combined £1 million tax-free allowance would face an IHT bill of £400,000.

High-net-worth estates often include several complex assets, such as property, business interests, agricultural land, overseas assets, investment portfolios, trusts, pensions and valuable chattels.

Our inheritance tax planning solicitors can assess available exemptions and reliefs and identify how any liability could be funded without disrupting the estate.

What is high-net-worth estate planning?

High-net-worth estate planning is the coordinated legal and tax planning used to protect, manage and transfer a complex or high-value estate. It commonly covers Wills, trusts, inheritance tax, lifetime gifts, business succession, property, pensions, incapacity and overseas assets.

Why is estate planning important for high-net-worth families?

Estate planning is the process of organising your personal and financial affairs, to ensure your assets are passed on in line with your wishes.

For high-net-worth families, this is especially important due to greater tax exposure and more complex asset structures.

The RNRB, begins to taper once an estate exceeds £2 million. For every £2 above that threshold, the allowance reduces by £1. This means that for a married couple with an estate worth £2.7 million or more, the entire RNRB is lost, resulting in a higher IHT bill.

Many high-net-worth families hold wealth in illiquid assets such as property and business interests, meaning there may not be enough cash to pay the IHT bill, and the illiquid assets cannot be sold until the IHT bill has been paid and a Grant issued.

The tax is due by the end of the sixth month after death, which can cause difficulties when grieving families need to find the cash to pay the bill. Estate planning may involve putting in place insurance policies to pay the IHT due on your death to relieve your loved ones of this financial pressure.

Complex asset structures can create further challenges. Business succession needs to align with any shareholder’s agreement and articles of association, while overseas assets may be subject to local probate rules, forced heirship and possible double taxation.

Without proper guidance, estates can face delays, unnecessary tax and unexpected complications, adding pressure for family members at an already difficult time.

Careful planning lets you make important decisions now, rather than leaving them for your loved ones after your death. A carefully drafted Will should form the foundation of your plan, and our Will writing solicitors can ensure it reflects your family structure, assets and succession objectives.

Making a Will

Why is making a Will important if you have significant wealth?

A Will is the foundation of effective estate planning.

For individuals with greater tax exposure, it can help make use of available exemptions and reliefs to reduce IHT. For example, carefully drafted charitable gifts can reduce the tax rate applied to the remaining estate from 40% to 36%.

High-net-worth estates are also more likely to give rise to disputes.

Our guide to contesting a Will involving a high-net-worth estate explains the additional management, evidence and cost issues that can arise in valuable estates.

Having a Will provides clear instructions to ensure your intentions are understood and your estate is administered how you want it to be.

Carefully deciding where your wealth should go, and who should manage it, can lead to a better outcome for your family and future generations.

Key considerations for high-net-worth individuals making a Will

A Will appoints Executors to deal with administration, pay debts and distribute assets. A Will also appoints Trustees to manage any ongoing trust set up in the Will. Your Executors and Trustees should be trustworthy and capable of carrying out these duties. For large or complex high-net-worth estates, a professional executor may be appropriate. Executors dealing with valuable or complex assets may also require specialist estate and trust administration advice after a death.

A Will also sets out your wishes as to who inherits your estate. When deciding who should benefit, it may be appropriate to consider tax planning options such as the spouse exemption, charitable gifts or trusts.

A Will can also provide your instructions as to what happens if all intended beneficiaries have died before you. A ‘disaster clause’ can specify who should inherit in those circumstances, preventing the estate being partially intestate (which means the law would dictate who inherits by the rules of intestacy). This could avoid unintended gifts to distant relatives.

What happens if a high-net-worth individual dies without a valid Will?

If there is no valid Will, or the Will does not dispose of the entire estate, the estate is dealt with under the intestacy rules. These rules determine who is entitled to administer the estate and who inherits.

The intestacy rules may not reflect your wishes. For example, a spouse does not automatically inherit the entire estate, or on the contrary, a spouse could inherit even if the couple had separated but not yet divorced.

Children would inherit at 18, which may expose them to substantial wealth at a young age. The intestacy rules are rigid and do not reflect many modern family arrangements, meaning unmarried partners, cohabitees, stepchildren and unadopted children may inherit nothing.

This can lead to costly claims where individuals pursue legal action to receive adequate provision. A properly drafted Will can make provision for those individuals from the outset and help avoid unnecessary legal costs.

The Estate Planning Process for HNW Families

Estate planning is an ongoing process, not a one-off exercise. All assets and liabilities should be reviewed, and the plan should be revisited after life events such as marriage, divorce, the birth of a child or grandchild, the sale or purchase of a business or property, or the death of a family member. Professional advice is important to identify available reliefs, avoid common pitfalls and assess the best overall outcome.

For high-net-worth families, estate planning is not just deciding what happens after death. Consideration should also be given to managing and protecting assets during lifetime, for example, setting up a lifetime trust or planning for possible incapacity by preparing Lasting Powers of Attorney.

Preparing Lasting Powers of Attorney allows trusted individuals to manage financial or welfare decisions if you lose capacity.

Business, Property and Complex Assets

How are business interests dealt with?

For high-net-worth individuals who own businesses, planning ahead can avoid confusion and conflict and instead provide continuity and stability. This should include reviewing any relevant documents such as shareholder’s agreements and ensuring your Will works in harmony with them.

How should property portfolios be dealt with in a Will?

High-net-worth individuals with property portfolios should have a clear plan for how those properties will pass after death. The Will should be carefully drafted to reflect and give effect to those wishes.

A solicitor can provide advice tailored to the individual circumstances, including how the properties are owned. If they are held within a company, the Will deals with the shares in that company rather than the properties themselves.

If properties are held in a sole name, ownership must be transferred after death, including updating the title at the Land Registry.

Where properties are tenanted, tenancy arrangements will need to be transferred. If they are mortgaged, the lender will need to be involved, either to continue payments or to sell the property and repay the mortgage.

How should overseas assets be dealt with in a Will?

Each country has its own legal system, tax rules and succession laws. Some jurisdictions apply forced heirship rules, meaning certain relatives may inherit regardless of the terms of your Will. Seeking local legal advice to understand the relevant rules and having separate Wills in each jurisdiction is what our team would advise.

Tax, Trusts and Passing on Wealth

High-net-worth families should consider their IHT liability and start their IHT planning as early as possible to mitigate their IHT exposure.

Several planning strategies may be available, but every family is unique, so options should be discussed with your solicitor.

Life insurance is increasingly used to plan for IHT, particularly where estates include illiquid assets. For example, a multi-million-pound family business passing to children may create a substantial tax liability which poses a problem if there are insufficient cash funds or other readily realisable assets to meet the bill.

A policy written into trust means the insurance policy would pay out to the nominated beneficiaries, before probate, allowing them to pay the IHT liability.

Strategic gifting can also reduce IHT exposure. Gifts remove value from the estate, which can lower the tax due on death. This may involve using the annual exemption, small gifts allowance, gifts from surplus income and potentially exempt transfers.

However, the rules are complex, and gifting can carry risk if not handled correctly, including gifts with reservation of benefit, the seven-year rule and deliberate deprivation of assets. Your solicitor will guide you through these rules.

Trusts could help mitigate IHT exposure by moving assets outside the taxable estate while retaining control over who benefits and when. They do, however, carry their own risks and have their own IHT rules, and your solicitor would discuss these with you.

When properly drafted, trusts can protect assets from risks such as divorce, bankruptcy, care fees and beneficiaries who may not yet be ready to manage substantial wealth. They can also be useful for vulnerable beneficiaries who cannot manage their own finances.

Despite their more complex administration and tax treatment, trusts can remain a valuable tool for generations.

Where trusts already hold family wealth, specialist trust administration advice can help trustees meet their legal, tax and reporting responsibilities.

Which Inheritance Tax reliefs and allowances apply to a high-net-worth estate?

In addition to the core allowances and exemptions as outlined above, high-net-worth individuals may be able to use Agricultural Property Relief (“APR”) and Business Property Relief (“BR”).

APR and BR can provide 100% relief on qualifying business and agricultural assets up to £2.5 million, with an effective rate of 20% IHT for the value above that threshold. The rules and limitations are detailed, so advice should be taken to maximise the available reliefs.

Pensions

How do pensions fit into high-net-worth estate planning and, will unused pension funds increase inheritance tax exposure?

From 6 April 2027, most unused pension funds and death benefits will form part of your taxable estate on death.

This marks a significant change from the current position, where pension funds are generally exempt from IHT. Pensions have long been a valuable way to pass on wealth tax-free, but including unused pension funds in the estate may push more estates above the tax-free threshold and increase the overall IHT liability.

Should high-net-worth families review pension nominations?

Pension nominations should be reviewed regularly to ensure your pension passes to your chosen beneficiaries. Your Will does not automatically determine who receives your pension, and outdated nominations can result in unintended beneficiaries.

Without a nomination, the pension provider has no clear guidance, which can cause delays while they decide who should receive the funds.

Family Dynamics and Risk

Estate planning for blended families or children from previous relationships

Estate planning for blended families can be complex and should be tailored to the family’s circumstances. There is no single solution, so legal advice should be taken to help balance the needs of everyone involved.

A common challenge is protecting children from a previous relationship while also providing for a current spouse. Your solicitor will be able to talk you through the possibility of including a Life Interest Trust in your Will which would allow the surviving spouse to benefit from the trust during their lifetime with the capital being ringfenced for the deceased’s children following the death of the surviving spouse.

Open, honest discussions with family members can help reduce the risk of claims after your death. Explaining your intentions and recording your reasons in writing alongside your Will can provide useful context and help prevent disputes.

Why choose Aaron & Partners?

Our private-wealth specialists have received independent recognition in the Chambers High Net Worth Guide and Legal 500 for advising clients on complex wealth, succession and estate matters.

High-net-worth estate planning requires more than a standard Will or a one-off review of your tax position. It should bring together your personal wishes, family relationships, business interests, property, investments, pensions and any assets held overseas.

Starting the process early gives you more opportunities to manage potential tax liabilities, protect vulnerable or younger beneficiaries, plan for business continuity and reduce the risk of disputes. It also allows your arrangements to evolve as your wealth, family and priorities change.

Our Wills, Trusts and Tax solicitors provide discreet, practical advice tailored to complex estates. We work closely with clients and their other professional advisers to develop clear, considered plans that protect wealth and provide greater certainty for future generations.

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