Tax advisers for high net worth individuals is a specialist who provides in-depth tax planning and compliance services to people with significant wealth. HMRC’s Wealthy Team defines a wealthy individual as someone with annual income exceeding £200,000 or net assets of at least £2 million in any of the preceding three years. A separate HMRC unit, the High Net Worth Unit, focuses specifically on individuals with assets of £10 million or more.

These advisers go well beyond standard accountancy. They handle the layers of complexity that come with owning multiple assets, running businesses, holding investment portfolios, and planning for intergenerational wealth transfer. Their work spans inheritance tax planning, capital gains tax management, trust structuring, and ensuring clients remain fully compliant as HMRC’s scrutiny of wealthy individuals intensifies.

This guide is written for:

• Individuals with net assets of £2 million or more
• Ultra high net worth families with assets of £10 million or more
• Business owners with complex or multi-entity holdings
• Beneficiaries of substantial estates

This guide focuses on UK tax law and HMRC compliance for the 2025/26 tax year. It does not cover international tax planning for non-UK residents or basic personal tax services.

Why Standard Accountants Are Often Not Enough

As wealth grows, so does its tax complexity. While a typical accountant can certainly manage self-assessment returns and business accounts with ease, the financial setups that high net worth individuals (HNWIs) have in place demand a more specialized skill set.

Think about the variety of income streams that many HNWIs juggle simultaneously: investment portfolios, rental income from properties, profits from business sales, dividends from privately owned companies, and distributions from trusts. Each of these has its own tax implications, and they interact in complex ways that call for a well-coordinated planning approach instead of just piecemeal advice.

HMRC’s Wealthy Team is made up of about 910 full-time professionals who focus on ensuring that wealthy individuals comply with tax regulations. If you’re a wealthy taxpayer, you might find yourself facing more in-depth inquiries, and any errors or oversights could lead to penalties that far exceed the cost of getting proper specialist advice right from the start.

Core Tax Advisory Services for High Net Worth Individuals

Inheritance Tax Planning

Inheritance tax (IHT) hits at a rate of 40% on the value of an estate that exceeds the nil-rate band, which is currently set at £325,000 per person and will remain at this level until at least April 2030. If you’re passing on a qualifying main home to direct descendants like children, stepchildren, adopted children, or grandchildren, you can benefit from an additional residence nil-rate band of up to £175,000 per person. This means the individual threshold can reach £500,000, or even up to £1 million for a married couple or civil partnership that utilizes both allowances.

However, keep in mind that the residence nil-rate band starts to taper off for estates valued over £2 million, decreasing by £1 for every £2 above that limit, and it completely vanishes at £2.35 million for individuals.

Specialist advisers help clients reduce IHT exposure through a range of strategies:

When it comes to lifetime gifting, you can take advantage of the annual exemption of £3,000 per person each year. Plus, there are potentially exempt transfers (PETs) that can be excluded from your estate if the donor lives for seven years after the gift. Another strategy is to set up trusts to gradually move assets out of your taxable estate.

If you own qualifying business assets, you can claim business property relief (BPR), which currently offers a generous 100% relief up to £2.5 million per person (keep an eye on the changes coming in April 2026). Similarly, agricultural property relief (APR) applies to eligible farming land and property, also capped at that same £2.5 million 100% relief limit starting in April 2026.

Charitable giving is another great option; if you leave at least 10% of your estate to a qualifying UK charity, it can lower the inheritance tax (IHT) rate to 36% on the remaining estate.

A quick heads-up: starting from 6 April 2026, the 100% IHT relief for business and agricultural property will be limited to a combined £2.5 million per individual, which is an increase from the initially proposed £1 million after government discussions. Any assets exceeding this cap will still qualify for relief, but at a reduced rate of 50%, leading to an effective IHT rate of 20% on that excess. The good news is that this £2.5 million allowance can be transferred between spouses and civil partners, giving couples a potential combined cap of £5 million. However, AIM-listed shares will no longer be eligible for 100% BPR and will only receive 50% relief starting in April 2026. These changes are crucial for business owners and farmers, so it’s wise for affected estates to reassess their planning before the April 2026 deadline.

Capital Gains Tax Planning

Now, let’s talk about Capital Gains Tax (CGT) planning. CGT kicks in when you sell assets for a profit. For the 2025/26 tax year, the annual CGT exemption is set at £3,000 per individual. After the Autumn Budget in October 2024, the rates will be unified across different asset types starting from 30 October 2024.

Trust Structuring

Trusts serve a range of purposes for high net worth families: passing wealth to the next generation in a controlled way, protecting assets, or providing for vulnerable beneficiaries. Common trust types used in HNWI planning include:

• Discretionary trusts, where trustees have flexibility over distributions to beneficiaries
• Bare trusts, often used to hold assets for children until they reach 18
• Loan trusts, which allow the settlor to retain access to capital while potential growth accumulates outside the estate
• Discounted gift trusts, which combine regular income with IHT planning
• Interest in possession trusts, where a named beneficiary has the right to income

Trust taxation involves entry charges, ten-year periodic charges, and exit charges, all of which a specialist adviser should calculate and manage. The entry charge for a discretionary trust is typically 20% on the value above the available nil-rate band. The periodic charge is up to 6% every ten years on the value above the nil-rate band.

Investment Portfolio Tax Planning

When it comes to tax planning for your investment portfolio, using tax-efficient wrappers can really help minimize the tax burden on your returns. Here are some key options to consider:

Pensions: For the 2025/26 tax year, the standard annual allowance is set at £60,000. However, this amount starts to taper for individuals whose threshold income goes over £200,000 and whose adjusted income exceeds £260,000. For every £2 of adjusted income above that £260,000 mark, the allowance reduces by £1, down to a minimum of £10,000.

ISAs: Each person has an annual allowance of £20,000, and the best part is that all gains and income within an ISA are completely sheltered from tax.

Venture Capital Trusts (VCTs) and Enterprise Investment Scheme (EIS) investments are also great options, as they provide income tax relief and capital gains tax deferral for qualifying investors.

It’s important for advisers to collaborate closely with investment managers to ensure that the construction of the portfolio and tax planning strategies are in sync, rather than working at cross purposes.

Compliance and HMRC Relationship Management

Wealthy individuals usually juggle a variety of tax return responsibilities, including self-assessment, trust returns, corporate tax filings, and possibly some overseas reporting too. That’s where a specialist adviser comes in handy, they keep track of deadlines, help coordinate information across various entities, and serve as the main contact with HMRC if any questions come up.

How to Choose the Right Tax Adviser

Check Professional Qualifications

Look for advisers who hold recognised qualifications. In the UK, relevant credentials include:

• Chartered Tax Adviser (CTA), awarded by the Chartered Institute of Taxation (CIOT)
• Fellow or Member of the Association of Taxation Technicians (ATT)
• Chartered Accountant (ACA or ACCA) with a private client specialism
• Solicitor specialising in private client or trust law, regulated by the Solicitors Regulation Authority

Avoid firms that cannot demonstrate regulated status or relevant professional membership.

Assess the Depth of Their Experience

General tax knowledge is not the same as HNWI specialism. Ask prospective advisers:

• What proportion of their client base is high net worth?
• What specific IHT, trust, or business tax cases have they worked on?
• Do they have in-house specialists for trusts, property tax, and business tax, or do they refer these areas out?

Understand the Service Model

Some firms offer a dedicated relationship manager who coordinates advice across disciplines. Others operate as a team of specialists you contact directly. Neither model is inherently better, but you should understand who you will be speaking to and how quickly they respond to time-sensitive tax matters.

Consider also whether the firm can work alongside your other professional advisers (solicitors, investment managers, accountants) without creating gaps or duplication.

Boutique Firms vs Larger Practices

Factor	Boutique Tax Firm	Large Accountancy Practice
Depth of specialisation	Often deep in specific areas such as IHT or trusts	Broad coverage with dedicated private client teams
Personal service	Direct access to senior advisers and relationship continuity	Structured team model with account management
Fee structure	Typically competitive and flexible	Higher rates with more standardised pricing
International reach	Dependent on referral networks	In-house international tax capability
Agility	Faster response on niche matters	Comprehensive resources and established systems

Boutique firms are a great fit for clients looking for a more personal touch and specialised expertise. On the other hand, larger firms might be the better choice when dealing with intricate international or corporate tax issues that need a range of in-house resources across different fields.

Common Challenges and How to Address Them

Managing International Assets and Cross-Border Tax

Clients who own property abroad, have foreign investments, or earn income from outside the UK need to navigate the complexities of multiple tax systems. Starting in April 2025, the UK’s Inheritance Tax (IHT) rules will change from being based on domicile to being based on residency. This means that long-term UK residents essentially, those who have been tax residents in the UK for at least 10 out of the last 20 years will now be liable for UK IHT on all their global assets, not just those located in the UK.

To help avoid the issue of being taxed on the same income in multiple jurisdictions, double taxation treaties between the UK and other countries come into play. However, these rules can be quite intricate, and the specifics of each treaty can differ. That’s why it’s crucial to work with specialist advisers who either have international tax expertise in-house or have built strong connections with tax professionals overseas.

Keeping Tax Planning Aligned with Business Goals

Tax efficiency should support commercial objectives, not override them. Well-structured advice considers the business implications of any tax-driven decision. Transferring assets into trust may reduce IHT exposure, for example, but could affect your ability to sell or refinance those assets later. A good adviser will present the full picture, not just the tax saving.

Keeping Up with Legislative Change

UK tax law is always evolving. The 2024 Autumn Budget brought about some notable changes to Capital Gains Tax (CGT) rates and how agricultural and business property relief will be treated in the future. Then, in the 2025 Autumn Budget and the following December announcement, there were further tweaks to the Business Property Relief (BPR) and Agricultural Property Relief (APR) rules. Starting in April 2027, unused defined contribution pension funds will be included in Inheritance Tax (IHT) for the first time, marking a significant shift in how pension holders approach estate planning.

Top specialist firms have dedicated research teams that keep a close eye on Budget announcements, updates from HMRC, and tribunal decisions. It’s essential to have regular strategy reviews with your adviser to ensure any changes that could impact your situation are taken into account.

What to Expect from the Adviser Relationship

Effective tax planning for high-net-worth individuals (HNWI) is a continuous journey that adapts to shifts in your personal life, your business, and the tax landscape.

Initially, you can expect a comprehensive review of your current financial situation, covering all asset classes and income sources. Your adviser should provide a detailed written plan that outlines their recommendations, the rationale behind each suggestion, and the anticipated outcomes.

Review meetings should be held at least once a year, and more often if significant events occur, like selling a business, experiencing a family death, or facing major legislative changes.

Summary

Tax advisers who focus on high net worth individuals bring a depth of knowledge that goes well beyond typical accounting practices. The financial intricacies that accompany significant wealth demand a well-coordinated approach to areas like inheritance tax, capital gains tax, trust law, investment structures, and compliance.

When selecting the right adviser, it’s essential to check their qualifications, review their experience with clients in similar situations, and ensure their service model aligns with your specific needs. The right expert guidance can lead to meaningful and lasting reductions in your tax liabilities while ensuring you remain fully compliant with HMRC regulations.

Keep in mind, this article serves as general guidance and should not be taken as tax advice. Tax regulations can change frequently, and everyone’s situation is unique. All figures and rates mentioned are based on the 2025/26 tax year. It’s always best to consult a qualified tax adviser who is regulated by the Chartered Institute of Taxation or the Financial Conduct Authority before making any decisions based on this information.

Frequently Asked Questions

1. What qualifications should I look for when choosing a tax adviser for high net worth individuals?

When selecting a tax adviser for high net worth individuals (HNWIs), prioritize specialists holding recognised professional credentials, such as CTA (Chartered Tax Adviser), STEP (Society of Trust and Estate Practitioners), or ACA/FCA (Chartered Accountant).

Unlike standard compliance accountants, accredited HNWI advisers possess deep expertise in complex areas like cross-border taxation, Family Investment Companies (FICs), trust structuring, and Inheritance Tax (IHT) optimization.

2. How does a specialist HNWI tax adviser differ from a general accountant?

A general accountant primarily focuses on historical compliance, routine tax returns, and basic business accounts. In contrast, a specialist HNWI tax adviser offers proactive, forward-looking strategies designed to preserve and transfer multi-generational wealth.

They handle intricate wealth structures such as offshore assets, private equity exits, residence and domicile rules, and specialized trust administration while ensuring full compliance with tax authorities like HMRC.

3. What key questions should I ask a potential tax adviser during an initial consultation?

To ensure the firm aligns with your wealth structure, ask these targeted questions:

• How many clients do you manage with a wealth profile similar to mine?
• What is your experience handling cross-border tax issues, trusts, or business exits?
• Are your strategies focused strictly on compliant mitigation, or do they involve aggressive tax structures?
• How do you charge for your services (e.g., fixed retainer, hourly rate, or project-based fee)?
• Will I work directly with a senior partner or be passed to junior staff?

4. Should I choose a boutique tax firm or a large “Big Four” firm for HNWI tax planning?

The right choice depends on the scale and geographic distribution of your assets:

• Boutique Tax Firms: Ideal for high-net-worth families seeking agile, highly personalised service with direct access to senior partners. They often offer transparent, cost-effective fee structures.
• Large / Big Four Firms: Best suited for ultra-high-net-worth individuals (UHNWIs) with multi-jurisdictional assets, international business holdings, or complex cross-border compliance needs across several countries.

5. Why is cross-border and domicile expertise essential when hiring a tax adviser?

Wealthy individuals often hold assets across multiple countries, hold dual citizenship, or spend significant time abroad. Incorrectly navigating statutory residence tests, remittance basis rules, or double-taxation treaties can lead to severe tax penalties in multiple jurisdictions.

An experienced HNWI tax adviser ensures foreign income, offshore trusts, and international property acquisitions are structured legally and tax-efficiently under both local and international laws.