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FCA Principles for Businesses Explained

Published May 2026 · 8 min read

The FCA's Principles for Businesses are the foundation of UK financial regulation. Everything else — COBS, CASS, MAR, the Senior Managers Regime — sits on top of them. Understanding the Principles is not just useful for the CISI UK Financial Regulation exam; it is the framework that makes the rest of the rulebook coherent.

What the Principles Are

The Principles for Businesses (PRIN) are eleven high-level obligations that apply to every FCA-authorised firm. They are not detailed rules — they are statements of the standard of behaviour the FCA expects from regulated firms at all times.

The FCA can take enforcement action against a firm for breaching a Principle even if no specific rule has been broken. A firm that technically complies with every detailed rule but acts in a way that undermines the spirit of the Principles is still in breach.

The Eleven Principles

1 — Integrity
A firm must conduct its business with integrity. Dishonesty, bad faith, deliberate misleading of clients or the regulator — all breach Principle 1.
2 — Skill, Care and Diligence
A firm must conduct its business with due skill, care and diligence. Incompetence that causes harm can breach this Principle even where there is no dishonesty.
3 — Management and Control
A firm must take reasonable care to organise and control its affairs responsibly and effectively, with adequate risk management systems.
4 — Financial Prudence
A firm must maintain adequate financial resources. Firms must hold enough capital to absorb losses and continue operating.
5 — Market Conduct
A firm must observe proper standards of market conduct. Firms must not engage in behaviour that distorts markets or undermines market integrity.
6 — Customers' Interests
A firm must pay due regard to the interests of its customers and treat them fairly. One of the most frequently cited Principles in FCA enforcement.
7 — Communications with Clients
A firm must communicate information to clients in a way that is clear, fair and not misleading. This underpins all financial promotions rules.
8 — Conflicts of Interest
A firm must manage conflicts of interest fairly, both between itself and its customers and between customers.
9 — Customers: Relationships of Trust
A firm must take reasonable care to ensure the suitability of its advice and discretionary decisions for customers entitled to rely on its judgement.
10 — Clients' Assets
A firm must arrange adequate protection for clients' assets when it is responsible for them. This underpins the detailed CASS rules.
11 — Relations with Regulators
A firm must deal with its regulators in an open and cooperative way, and disclose to the FCA anything the FCA would reasonably expect notice of.

How the Principles Are Tested

The exam will not typically ask you to recite which Principle is which number. It will present scenarios and ask which Principle has been breached, or whether a firm's conduct is consistent with its regulatory obligations.

Principle 7 — Questions about misleading communications almost always involve Principle 7 — clear, fair and not misleading.

Principle 9 — Questions about unsuitable advice involve Principle 9.

Principle 10 — Questions about client money involve Principle 10.

Principle 11 — Questions about a firm failing to disclose something to the FCA involve Principle 11.

Principle 6 — The broadest Principle — appears in the widest range of scenarios where a firm benefits at the expense of the client.

The Consumer Duty

Since July 2023, the FCA's Consumer Duty has added a further layer of obligation for firms dealing with retail customers. The Duty requires firms to deliver good outcomes for retail customers across four areas: products and services, price and value, consumer understanding, and consumer support.

The Consumer Duty sits alongside the Principles rather than replacing them. The standard for retail customer treatment has been raised — firms cannot simply comply with specific rules and assume that is sufficient.

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The Principles for Businesses are the logic underneath the rulebook. Once a candidate understands what each Principle is protecting against — and why — the specific rules in COBS, CASS, and elsewhere stop feeling like a list to memorise and start feeling like the natural consequence of those principles applied to specific situations.