How Discretionary Investment Management Is Regulated in the UK: An Adviser's Guide

The permission that comes before the portfolio

A firm can have a brilliant investment process, a strong track record, and a polished pitch, and still not be allowed to run a single discretionary portfolio. The reason is simple: managing investments on a discretionary basis is a regulated activity in its own right, and the rulebook that governs it is wider than most advisers assume. “Discretionary investment management compliance” is one of the steadier search terms advisers bring to this site, and the honest answer is that it spans at least six parts of the FCA Handbook working together, not a single rule you can point to.

This guide sets out the regulatory framework that sits behind a discretionary mandate: the permission, the client agreement, suitability, reporting, best execution, and the Consumer Duty layer over the top. Understanding it sharpens your due diligence, because the right questions to ask a discretionary manager fall straight out of the rules they are bound by.

Discretionary management is a permission, not a label

The starting point is authorisation. Managing investments, which includes exercising discretion over a client’s portfolio, is a regulated activity under the Financial Services and Markets Act 2000 (Regulated Activities) Order. A firm must hold the specific FCA permission to manage investments before it touches a discretionary account.

This matters for adviser firms in two directions. If your firm holds advisory permissions only, you cannot exercise discretion yourself, however informal the arrangement feels; you must appoint an authorised discretionary manager. And when you appoint one, the first check is the most basic: confirm the firm holds the managing investments permission on the Financial Services Register and that the reference number matches. A permission gap is not a technicality. It determines whether the service is lawful at all.

The distinction between running discretion and advising on it is the foundation of the whole structure, and it is worth being precise about. We set it out in full in discretionary vs advisory management.

The rulebook behind a discretionary mandate

No single chapter of the Handbook governs discretionary management. The obligations are distributed, and they apply simultaneously. The table below maps the main ones.

Area	Where it lives	What it requires
Permission to manage investments	FSMA Regulated Activities Order	FCA authorisation for the specific activity
Client agreement	COBS 8A	A written agreement defining the discretionary mandate
Suitability	COBS 9A	The portfolio must remain suitable, with periodic review
Periodic reporting	COBS 16A	Quarterly statements plus 10 percent depreciation alerts
Best execution	COBS 11.2A	Sufficient steps to get the best possible result
Conflicts of interest	SYSC 10	Identify, prevent, and manage conflicts
Client assets	CASS	Protection and segregation of client money and assets
Fair value and outcomes	Consumer Duty	Good outcomes across price, products, and support

Read across the table and a pattern emerges. The rules are not about the investment decisions themselves; they are about the framework within which those decisions are made, evidenced, and reported. That is exactly where a discretionary manager either earns trust or loses it.

The client agreement defines the discretion

Before a discretionary manager makes a single trade, COBS 8A requires a written client agreement. For discretionary management this document does more than tick a box; it is the boundary of the manager’s authority. It sets out the mandate: the objectives, the risk parameters, any constraints or exclusions, the benchmark, the fee basis, and the limits on what the manager may and may not do without reference back.

A weak agreement is a real risk indicator. If the mandate is vague about constraints, leverage, or the use of complex instruments, the manager has broad latitude and the client has thin protection. When you review a discretionary service, read the agreement as carefully as the performance figures. The clarity of the mandate tells you how disciplined the firm is.

Suitability does not stop at onboarding

A common misconception is that, once discretion is granted, suitability becomes the manager’s private concern. It does not. Under the COBS 9A suitability rules, the discretionary manager must ensure the portfolio remains suitable for the client on an ongoing basis, not just at the point of sale. That means periodic suitability assessments, reflecting changes in the client’s circumstances, objectives, and capacity for loss.

For the adviser, this creates a shared obligation rather than a clean handover. You retain responsibility for the advice to use discretionary management and for keeping the manager informed of material changes in the client’s situation. The manager owns the portfolio-level suitability. Mapping who owns what, and evidencing it, is the heart of your ongoing oversight duty, which we cover in detail in ongoing DFM oversight under Consumer Duty.

The reporting rules advisers underestimate

COBS 16A sets out the reporting a discretionary manager owes retail clients, and two parts deserve attention because they are routinely glossed over.

First, the periodic statement. The manager must report at least every three months, setting out the portfolio’s composition, valuation, performance, and the total costs and charges incurred over the period. Quarterly is the floor, not the standard to aspire to.

Second, the 10 percent depreciation notification. Under COBS 16A.4.3, the manager must inform the client by the end of the business day on which the overall portfolio value falls by 10 percent or more against the last periodic statement, and again at each further 10 percent fall. This is a live, time-critical obligation, and a manager’s process for meeting it is a sharp test of operational quality. Ask any prospective manager exactly how their 10 percent alerts are triggered and delivered. The answer reveals whether their compliance is real or theoretical.

Best execution and conflicts of interest

Two further duties shape day-to-day conduct. Under COBS 11.2A, the manager must take all sufficient steps to obtain the best possible result for clients when executing orders, considering price, costs, speed, and likelihood of execution. The firm should have an execution policy and be able to evidence outcomes against it.

Under SYSC 10, the manager must identify, prevent, and manage conflicts of interest. In discretionary management the obvious ones are the use of in-house or affiliated funds, dealing commission arrangements, and any incentive that could tilt portfolio decisions. A manager who runs their own products inside client portfolios is not automatically conflicted, but they should disclose it clearly and show how the conflict is controlled. This is precisely the kind of question your due diligence should force into the open, as we set out in due diligence when choosing a discretionary fund manager.

Client assets sit under a separate regime

Where the manager holds or controls client money or assets, the CASS rules apply, governing segregation and protection so that client assets are ring-fenced from the firm’s own. Many discretionary managers use a third-party custodian rather than holding assets themselves, which changes the operational picture and, often, the strength of the protection. The choice of custodian is not a back-office detail; it is central to client confidence, a point we develop in the role of institutional custody.

Consumer Duty sits across the whole structure

Every rule above now operates under the Consumer Duty. The Duty does not replace the conduct rules; it raises the standard they are held to. A discretionary service must deliver fair value, communications the client can understand, products and services designed for an identified target market, and support that meets client needs.

For discretionary management, the fair value test is the one with teeth. A manager whose all-in cost is high relative to the service delivered, or whose performance does not justify the active premium, has a fair value problem regardless of whether every COBS box is ticked. The Duty asks not just “is this compliant?” but “is this a good outcome?” That is a higher bar, and it is the lens through which your own file will be judged if the recommendation is ever challenged.

What this means for your due diligence

The regulatory framework is not just background. It is a ready-made checklist for assessing any discretionary manager:

1. Confirm the managing investments permission and the FCA reference number on the Register.
2. Read the client agreement and test how tightly the mandate is drawn.
3. Ask how ongoing suitability is reassessed and how often.
4. Probe the 10 percent depreciation process specifically; ask to see how an alert is generated.
5. Review the periodic reporting for completeness on costs, charges, and performance.
6. Request the execution policy and evidence of best execution monitoring.
7. Identify conflicts, especially in-house funds, and how they are managed.
8. Confirm the custody arrangement and the protection it provides.
9. Step back and apply the fair value test: is the total cost proportionate to the outcome?

A manager who answers these crisply is demonstrating the discipline the rules demand. A manager who is vague on any of them is showing you a gap before it becomes your problem. The broader case for using discretionary management, and when it earns its place, is set out in discretionary fund management: what advisers need to know.

The framework is the protection

Discretionary investment management hands real authority to a third party, and the regulatory framework exists to keep that authority accountable. For advisers, the rules are not an obstacle; they are the structure that lets you delegate the investment function with confidence, provided the manager genuinely meets them. Know the framework, ask the questions it implies, and the choice of manager becomes an evidence-based decision rather than an act of faith.

If you would like to discuss how a single institutional-grade discretionary solution measures against the framework above, including custody, reporting, and fair value across different client sizes, contact us or read more about turnkey multi-family office solutions.