Fixed Fee vs Percentage-Based Financial Advice: Which Is Right for You?

How your financial adviser charges you is not a minor administrative detail. Over a 20-year relationship, the difference between a 1% AUM fee and a fixed retainer of £15,000 per year on a £5 million portfolio is approximately £640,000 in compounded wealth — a figure that would pay for a significant amount of advice several times over.

The right fee structure depends on your circumstances, your portfolio size, the complexity of your affairs, and the nature of your relationship with your adviser. This guide explains the main models, their advantages and disadvantages, and the questions to ask before engaging an adviser.

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The Post-RDR Landscape

Before 2013, the vast majority of UK financial advisers were paid by commission — a payment made by the product provider (the fund manager, insurance company, or investment platform) each time the adviser recommended a product. This created an obvious conflict of interest: an adviser had a financial incentive to recommend products that paid the highest commission, regardless of suitability.

The Retail Distribution Review (RDR), which took effect in January 2013, abolished commission for retail investment advice in the UK. Since RDR, advisers must charge clients directly and transparently for their services, and must disclose all charges in advance.

The result was a significant shift in the industry, but the percentage-of-AUM model — rather than hourly or fixed-fee structures — became the default for most firms.

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The AUM Percentage Model

How it works: the adviser charges an annual fee expressed as a percentage of the assets they manage on your behalf. Typical rates are:

• £100,000–£500,000: 1.0–1.5% per annum
• £500,000–£2 million: 0.75–1.0% per annum
• £2 million–£5 million: 0.5–0.75% per annum
• £5 million+: 0.25–0.5% per annum (negotiable)

These are advisory fees only; the underlying investment funds also carry their own annual charges (OCF), typically 0.1–0.75% depending on whether the portfolio uses passive or active funds.

The case for the AUM model:

• Alignment of interests: the adviser's income grows when the portfolio grows, and falls when the portfolio falls. In theory, both parties want the same thing.
• Proportionality: at lower wealth levels, a percentage fee scales naturally with the client's ability to pay.
• No upfront cost: the fee is deducted automatically from the portfolio, meaning no cash payment is required.
• Simplicity: clients understand "1% of what we manage" more easily than itemised hourly billing.

The case against the AUM model:

• As the portfolio grows, the adviser earns significantly more without necessarily providing more service. A client whose portfolio grows from £2 million to £5 million over 10 years sees their annual fee triple — but the adviser's workload has not tripled.
• The model discourages simplicity. An adviser charging 1% AUM has a financial incentive to recommend that more assets are "under management" — keeping money in managed accounts rather than recommending a mortgage overpayment, pension consolidation, or property purchase that would reduce investable assets.
• The fee is often quoted as a percentage, which obscures its cash value. A 0.75% fee on a £4 million portfolio is £30,000 per year — a figure that clarifies the cost in a way that "0.75%" does not.

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The Fixed Fee and Retainer Model

How it works: the adviser charges a fixed annual retainer (typically £5,000–£25,000 for a HNW client) or a fixed fee per service (a full financial plan: £3,000–£10,000; an annual review: £1,500–£5,000; specific advice on a pension transfer: £2,000–£7,500).

The case for fixed fees:

• Completely transparent: you know the cost before you engage, and it does not change as your portfolio grows.
• No conflict of interest: the adviser has no incentive to keep assets under management; they can recommend the most suitable structure regardless of whether it increases or reduces managed assets.
• Often cheaper for larger portfolios: a £5 million client paying £25,000 per year (0.5%) under a retainer pays the same as a 0.5% AUM fee — but the retainer is capped and will not increase further as the portfolio grows.
• Encourages holistic advice: the adviser is engaged to look after your financial affairs, not just your investment portfolio.

The case against fixed fees:

• Requires the client to write a cheque rather than having the fee deducted automatically — psychologically more painful.
• Can be uneconomic at lower wealth levels: a £10,000 annual retainer represents 2% of a £500,000 portfolio.
• Some advisers use fixed fees as loss leaders, then recommend high-margin products that generate ancillary income.
• The value of advice is sometimes easier to quantify under the AUM model (a 1% fee for a portfolio that outperforms by 2% is clearly worth paying) than under a fixed retainer.

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The Hourly Rate Model

Some advisers charge by the hour, typically £200–£500 per hour. This is common for:

• Solicitors providing estate planning or tax advice.
• Accountants providing tax advice on a specific transaction.
• Financial planners providing a one-off financial planning exercise.

The hourly model is transparent but creates uncertainty — a complex planning exercise can run to many tens of hours, and clients are often unable to predict the total cost in advance. Most advisers offering hourly rates will provide a written estimate before commencing work.

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The Hybrid Model

An increasing number of firms now offer a hybrid structure: a fixed fee for financial planning services (the production of a comprehensive financial plan, ongoing strategic advice, annual reviews) combined with an asset management fee for the investment portfolio (on a sliding scale, typically 0.25–0.5% for larger portfolios).

This hybrid approach separates the value components:

• Financial planning: strategic advice, tax planning, estate planning coordination, cash flow modelling, insurance reviews — charged as a flat retainer.
• Portfolio management: investment selection, rebalancing, monitoring — charged as a percentage of assets under management.

The hybrid model is often the most appropriate structure for HNW clients with complex affairs. The planning advice is most valuable when it is truly independent of the investment management, and the investment management charge reflects the cost of actually running money.

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The FCA Consumer Duty and Value for Money

The FCA's Consumer Duty, which came fully into force in 2023 and 2024 for open and closed products respectively, requires firms to demonstrate that their products and services deliver fair value to clients. For financial advice firms, this means:

• Advisers must assess whether the charges paid by each client are commensurate with the services received.
• Firms must evidence that clients understand the charges they are paying.
• The "fair value" assessment must be documented and repeated regularly.

In practice, Consumer Duty has focused the industry's attention on the AUM model's fairness for larger clients. An adviser charging 1% on a £10 million portfolio — generating £100,000 in annual fees — must be able to demonstrate that the client receives £100,000 of value each year. For many large portfolios, this is genuinely difficult to justify.

Consumer Duty has not abolished the AUM model, but it has strengthened the hand of large clients in negotiating lower fees or shifting to alternative structures.

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What Should a Large Client Pay?

There is no single correct answer, but the following benchmarks are relevant for UK HNW clients:

Portfolio Size	AUM Equivalent	Indicative Fixed Retainer	Typical Market Range
£1m	1.0% = £10,000/yr	£8,000–£15,000	£8,000–£15,000
£2m	0.75% = £15,000/yr	£12,000–£20,000	£12,000–£20,000
£5m	0.5% = £25,000/yr	£15,000–£30,000	£15,000–£40,000
£10m	0.3% = £30,000/yr	£20,000–£40,000	£20,000–£50,000
£20m+	Negotiated	Family office or MFO	Varies widely

At £5 million and above, a well-structured fixed-fee or hybrid arrangement will almost always be cheaper than the AUM model, and may also provide genuinely better advice by eliminating the conflicts inherent in asset-based charging.

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Questions to Ask Before Engaging an Adviser

1. What is the total annual cost of your service, in pounds and pence — not percentages?
2. What services are included in that fee? What is excluded and charged separately?
3. Does your fee increase automatically as my portfolio grows, or is it fixed?
4. Do you receive any payments from product providers, platforms, or fund managers? (Post-RDR, the answer must be no for retail investment advice, but trail commission, platform rebates, and fund research fees exist in some arrangements.)
5. Can you show me an example of what I will receive for my annual fee?
6. How do you assess and demonstrate value for money under Consumer Duty?

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Whole-of-Market vs Restricted Advice

Separately from the fee model, UK advisers are classified as either:

• Whole-of-market (independent): able to recommend products from any provider across the market.
• Restricted: limited to products from a panel of providers, or to specific product types.

This distinction matters because a restricted adviser may be structurally unable to recommend the most suitable product for your circumstances, even if they are personally well-qualified. Always confirm whether your adviser is independent or restricted.

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The above information is general guidance only. The right fee structure depends on your individual circumstances, the complexity of your financial affairs, and the scope of services you require. Adviser charges and market rates change. Always obtain a clear written schedule of charges before engaging any adviser. The FCA's consumer guidance on financial advice charges is available at fca.org.uk.

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How Global Investments can help

Global Investments operates as an independent international wealth management practice, advising HNW and UHNW clients on portfolio construction, tax planning, estate structuring, and international financial planning. We discuss fee structures openly with prospective clients and ensure that our charges are transparent and proportionate to the scope of services provided. If you are reviewing your current advisory relationship — or if you have never had your fee structure properly analysed — we would welcome the opportunity to provide an independent assessment.