8.1 Principles for Businesses and Conduct of Business Rules

Key Takeaways

  • The FCA's Principles for Businesses are set out in PRIN 2.1 of the FCA Handbook and apply to all authorised firms as the highest-level conduct standards
  • Principle 1 (Integrity) and Principle 2 (Skill, care and diligence) impose general duties; Principle 6 (Customers' interests) underpins Treating Customers Fairly and now sits alongside Principle 12 (Consumer Duty)
  • The 11 Principles were supplemented in July 2023 by Principle 12 (Consumer Duty) requiring firms to act to deliver good outcomes for retail customers
  • PRIN sits above the detailed Conduct of Business (COBS) rules: a firm can breach a Principle even where no specific COBS rule is broken, and the FCA may take enforcement action under either layer
  • Breaches of Principles can lead to fines, public censure, withdrawal of authorisation and senior manager accountability under the SMCR
Last updated: July 2026

Principles for Businesses and Conduct of Business Rules

The Principles for Businesses are the bedrock of the FCA's conduct regime. They are set out in PRIN 2.1 of the FCA Handbook and apply to every authorised firm, regardless of size or sector. A firm that breaches a Principle is in breach of the Handbook even if no detailed rule has been broken, because the Principles express the overarching standards of behaviour the FCA expects.

Where PRIN Sits in the Handbook

The Handbook is layered. At the top sit the high-level standards (PRIN, SYSC, FIT, APER, etc.), beneath them sit the conduct rules in COBS (Conduct of Business Sourcebook), and beneath those sit more specialist sourcebooks such as MIPRU, IFPRU and BIPRU for prudential matters. PRIN does not replace COBS — it sits above it. A firm can comply with every detailed COBS rule and still breach a Principle, for example by acting without integrity or without due skill, care and diligence. The FCA can take enforcement action for breach of a Principle alone.

The 11 Principles (Plus Consumer Duty)

The original 11 Principles are set out in PRIN 2.1.1R. In July 2023 the FCA added Principle 12 (Consumer Duty) in PRIN 2.1.1R(12), described in section 8.2. The 11 original Principles are summarised below.

#PrinciplePlain meaning
1IntegrityThe firm must conduct its business with integrity — honestly and ethically
2Skill, care and diligenceThe firm must act with due competence and attention
3Management and controlThe firm must organise and control its affairs responsibly with adequate risk management
4Financial prudenceThe firm must maintain adequate financial resources
5Market conductThe firm must observe proper standards of market conduct
6Customers' interestsThe firm must pay due regard to customers' interests and treat them fairly
7Communications with clientsCommunications must be clear, fair and not misleading
8Conflicts of interestThe firm must manage conflicts fairly, both firm-vs-customer and customer-vs-customer
9Customers: relationships of trustThe firm must take reasonable care to ensure suitability of advice and discretionary decisions
10Clients' assetsThe firm must arrange adequate protection for client assets it controls
11Relations with regulatorsThe firm must deal with regulators openly and cooperatively, disclosing matters the FCA would reasonably expect notice of

Integrity and Skill, Care and Diligence

Principle 1 (Integrity) is the most fundamental. The FCA has fined firms for reckless disregard of customer interests on the basis of integrity failures alone, even where specific rules had not been broken. Principle 2 (Skill, care and diligence) overlaps with the Senior Managers and Certification Regime (SMCR) — individuals can be personally fined under SMCR for lacking the competence their role requires.

Customers' Interests, Communications and Suitability

Principles 6, 7 and 9 work together. Principle 6 underpinned the FCA's Treating Customers Fairly (TCF) initiative and still applies alongside Principle 12. Principle 7 requires that product information, marketing and ongoing communications are clear, fair and not misleading. Principle 9 is the suitability rule — a firm giving advice or taking discretionary decisions must ensure the recommendation is suitable for a customer entitled to rely on its judgement.

Conflicts, Client Assets and Regulator Relations

Principle 8 (Conflicts) requires firms to identify and manage conflicts fairly, disclosing them where they cannot be managed. Principle 10 (Client assets) is enforced through the Client Assets Sourcebook (CASS), which sets segregation and reconciliation rules for client money and safe custody assets. Principle 11 (Relations with regulators) requires timely notification of material issues — for example, significant breaches, complaints patterns, or disciplinary action against SMF-certified staff.

How PRIN Relates to COBS

COBS is the detailed rulebook that operationalises the Principles for retail and wholesale conduct. Where COBS sets a specific rule — for example, the requirement to provide a cost and charges disclosure (COBS 4.6A) or a suitability report (COBS 9A.4) — a breach of that rule is also a breach of Principle 6 or 9. The reverse is not always true. The FCA can show a firm breached a Principle even where the conduct did not violate a specific rule, by arguing the behaviour fell short of integrity, fairness or due skill. This is the regulatory force of the Principles: they are a backstop that catches conduct the rule drafter did not anticipate.

Enforcement of the Principles

The FCA's enforcement powers are set out in DEPP (the Decision Procedure and Penalties manual). For a breach of a Principle the FCA may impose an unlimited financial penalty, issue a public censure, vary or cancel permissions, and approve individual prohibitions under SMCR. The FCA considers aggravating and mitigating factors — seriousness of the breach, harm caused, cooperation, senior management involvement and previous disciplinary record. Where a Principle 1 (Integrity) breach is found, penalties tend to be materially higher because integrity is treated as fundamental.

The Consumer Duty Layer

From 31 July 2023, Principle 12 (Consumer Duty) was added to PRIN. The Duty is given detailed form in PRIN 2A and applies to new and existing products; from 31 July 2024 it extended to closed products. Principle 12 requires firms to act to deliver good outcomes for retail customers. Principles 6 and 7 continue to apply but, where the Consumer Duty is in scope, it sets a higher standard. Section 8.2 explains the Duty in more detail.

Test Your Knowledge

Which sourcebook of the FCA Handbook contains the Principles for Businesses?

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B
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D
Test Your Knowledge

A firm complies with every relevant COBS rule but the FCA concludes it acted without honesty and ethical standards in a way the rules did not specifically address. On what basis can the FCA take action?

A
B
C
D
Test Your Knowledge

Which Principle requires a firm to arrange adequate protection for client money and safe custody assets?

A
B
C
D