MIFIDPRU & IFPR: The Investment Firm Prudential Regime Guide

The K-Factor Capital Model, ICARA and the New Prudential Framework for UK Investment Firms

The Investment Firm Prudential Regime (IFPR) — implemented through the FCA’s MIFIDPRU sourcebook in January 2022 — fundamentally restructured the prudential framework for UK investment firms. Replacing the previous CRR/CRD framework that had applied since the 2008 financial crisis, IFPR introduced a regime designed specifically for non-systemic investment firms — replacing risk-weighted asset calculations with K-factor capital based on the firm’s actual investment services activity. Combined with the new ICARA (Internal Capital Adequacy and Risk Assessment), the regime represents the most substantive prudential reform UK investment firms have experienced in over a decade.

This guide explains how MIFIDPRU and IFPR actually work in practice — the firm categorisation framework, the K-factor capital model, the ICARA combined assessment, the regulatory reporting obligations, and the operational reality for investment firms managing the regime. It also covers the recruitment dimension — the senior finance, risk and compliance leadership the regime requires, and what FD Capital sees during senior placements at investment firms managing IFPR transition or steady-state operation.

What’s missing from most online explanations of IFPR is the practical interpretation. The framework is well-documented; what’s harder to find is how investment firms have implemented it operationally, what good ICARA content looks like, and where the FCA has been actively engaged since the regime came into force. That’s the gap this guide fills.

Background — Why IFPR Replaced CRR/CRD for Investment Firms

The CRR/CRD framework (Capital Requirements Regulation and Capital Requirements Directive) was designed primarily for banks. It applied to investment firms as well, but the bank-centric design — with its focus on credit risk, risk-weighted assets, and the broader prudential requirements appropriate to deposit-taking institutions — created substantial mismatch with the actual risk profile of most investment firms.

The European Union conducted a multi-year review of the framework, ultimately producing the Investment Firms Directive and Investment Firms Regulation (IFD/IFR) — substantially adapted by the UK post-Brexit into IFPR through the MIFIDPRU sourcebook.

The substantive changes include:

• K-factor capital model — capital based on actual investment services activity rather than risk-weighted assets
• Firm categorisation — different requirements for systemic vs non-systemic firms, and within non-systemic firms, for small/non-interconnected vs other firms
• ICARA — combined ICAAP and wind-down planning into a single integrated assessment
• Remuneration framework — investment-firm-specific remuneration requirements
• Liquidity requirements — basic liquidity requirements appropriate to investment firm activities
• Reporting framework — comprehensive new prudential reporting obligations

For the broader prudential context, see our ICAAP Guide.

Investment Firm Categorisation Under IFPR

IFPR categorises investment firms based on size, complexity, and systemic significance:

Systemic and other significant firms (Class 1)

The largest investment firms whose failure could have systemic consequences. These firms continue to operate under the CRR/CRD framework rather than IFPR. Very few UK investment firms fall in this category.

Non-systemic investment firms (Class 2)

The majority of UK investment firms. Within Class 2, firms are further categorised:

• Small and non-interconnected investment firms (SNIs) — investment firms below specific size thresholds with limited interconnectedness, subject to a reduced regulatory framework
• Other Class 2 firms (non-SNIs) — investment firms that don’t qualify as SNI, subject to the full IFPR framework

SNI thresholds

To qualify as SNI, a firm must satisfy multiple criteria including:

• Assets under management below specific thresholds
• Client orders handled below specific thresholds
• Assets safeguarded and administered below specific thresholds
• Daily trading flow below specific thresholds
• Net position risk below specific thresholds
• Client money held below specific thresholds
• On and off-balance sheet assets below specific thresholds
• Total annual gross revenue below specific thresholds

The SNI test is conducted annually. Firms that exceed thresholds become non-SNI, with corresponding regulatory expansion. The thresholds are reviewed periodically by the FCA.

The K-Factor Capital Model

The core innovation of IFPR is the K-factor capital model — capital requirements based on actual investment services activity. The K-factors operate across three risk categories:

Risk to Client (RtC)

• K-AUM (Assets Under Management) — capital based on assets the firm manages
• K-CMH (Client Money Held) — capital based on client money held
• K-ASA (Assets Safeguarded and Administered) — capital based on assets in custody/administration
• K-COH (Client Orders Handled) — capital based on client orders the firm handles

Risk to Market (RtM)

• K-NPR (Net Position Risk) — capital based on net trading positions
• K-CMG (Clearing Member Guarantee) — capital for clearing-related exposures

Risk to Firm (RtF)

• K-TCD (Trading Counterparty Default) — capital for counterparty credit risk
• K-DTF (Daily Trading Flow) — capital based on daily trading volumes
• K-CON (Concentration) — capital for concentrated trading book exposures

The capital requirement

The total capital requirement is the highest of:

• The sum of K-factor requirements
• The fixed overheads requirement (FOR) — broadly equivalent to one quarter of fixed overheads
• The permanent minimum capital requirement (varies by firm type)

This three-way maximum ensures capital adequacy even where K-factors produce low requirements (e.g., for firms with limited investment services activity but material operational cost base).

ICARA — The Combined Assessment

The Internal Capital Adequacy and Risk Assessment (ICARA) is the IFPR equivalent of the historic ICAAP plus the wind-down planning requirement. ICARA must include:

Risk identification and assessment

Comprehensive identification of all material risks the firm faces, with capital requirements assessed for each. The ICARA must consider risks beyond those captured by K-factors — operational risk, conduct risk, business risk, and others.

Capital adequacy assessment

Forward-looking assessment of capital needs across the planning horizon, including under stress conditions. Stress testing must be substantively engaged.

Wind-down assessment

Substantive analysis of how the firm would wind down its business in an orderly manner, including the capital required to support the wind-down process. See our Wind-Down Planning Guide.

Internal liquidity assessment

Assessment of liquidity needs and the firm’s ability to meet obligations as they fall due, including under stress conditions.

Senior management ownership

The ICARA must have substantive senior management ownership — typically led by SMF2 (CFO) and SMF4 (CRO), with board approval and ongoing monitoring. See our SMF2 Guide and SMF4 Guide.

Remuneration Under IFPR

IFPR introduces a remuneration framework specifically for investment firms. The framework includes:

• Remuneration policy — firms must have a documented remuneration policy aligned to risk management and business strategy
• Material risk takers — identification of staff whose activities have material impact on the firm’s risk profile
• Variable remuneration limits — restrictions on variable to fixed remuneration ratios
• Deferral and clawback — substantial portions of variable remuneration must be deferred, with clawback provisions for misconduct or financial deterioration
• Non-cash instruments — significant portions of variable remuneration must be in non-cash instruments
• Disclosure requirements — public disclosure of remuneration practices and outcomes

The remuneration framework operates with proportionality — smaller firms have reduced obligations than larger firms. SNI firms have a substantially simplified framework.

Liquidity Requirements

IFPR introduces basic liquidity requirements appropriate to investment firm activities. Key elements include:

• Minimum liquid assets equivalent to one third of fixed overheads
• Liquid assets defined as cash, short-term deposits, and certain liquid securities
• Quarterly reporting of liquidity position
• ICARA assessment of liquidity stress and management actions

The liquidity framework is substantively simpler than the bank LCR/NSFR framework, reflecting the different liquidity profile of investment firms.

Reporting and Disclosure

IFPR establishes comprehensive prudential reporting requirements. Key returns include:

• MIF001-007 — quarterly K-factor data, capital position, and other prudential data
• ICARA-related submissions — annual
• Concentration risk reporting — for relevant firms
• Liquidity reporting — quarterly
• Remuneration reporting — annual

Plus public Pillar 3 disclosures for non-SNI firms — substantive public disclosure of capital position, risk management, and remuneration practices.

For the broader regulatory reporting context, see our SUP Guide.

Implementation — How Firms Have Adapted

Since IFPR came into force in January 2022, UK investment firms have adapted in several characteristic ways:

Capital level changes

For many firms, the move from CRR/CRD to IFPR resulted in capital changes. K-factor capital is typically lower than risk-weighted asset capital for firms with limited trading book activity, but higher for firms with substantial assets under management or client money holding.

Reporting infrastructure investment

The new MIF reporting suite required substantial reporting infrastructure investment for most firms — typically integrated into broader regulatory reporting platforms.

ICARA production

Firms transitioning from ICAAP to ICARA had to substantively expand the wind-down dimension while maintaining the historic capital and risk content.

Remuneration framework adjustment

Firms not previously subject to substantial remuneration regulation (smaller investment firms and others) had to develop appropriate remuneration frameworks aligned to IFPR.

Senior management ownership

The ICARA’s substantive senior management ownership requirement has elevated the role of the CFO and CRO in many investment firms.

FCA Supervisory Focus Since IFPR Implementation

FCA supervisory dialogue on IFPR since 2022 has highlighted several themes:

ICARA quality. Whether ICARA documents reflect substantive work or are CRR/CRD ICAAPs with wind-down sections added.

Wind-down credibility. Whether wind-down planning is operationally credible — the firm could actually execute the plan in stress conditions.

Stress testing severity. Whether stress scenarios are genuinely adverse rather than reflective of mild downside.

K-factor accuracy. Whether K-factor calculations accurately reflect actual investment services activity.

Remuneration framework substance. Whether remuneration practices have been substantively aligned to IFPR rather than just policy documentation updated.

Reporting accuracy. Whether MIF reporting is accurate and timely.

SNI categorisation. Whether firms have correctly assessed whether they qualify as SNI, with continuing monitoring of whether thresholds are exceeded.

Common IFPR Pitfalls

Inadequate ICARA wind-down. Wind-down sections that meet documentary requirements but lack operational credibility.

Stress testing weakness. Insufficient stress severity, with stress impacts that don’t substantively challenge the firm.

K-factor calculation errors. Particularly where K-factor methodology is interpreted incorrectly or where data inputs are inaccurate.

SNI threshold breaches not detected. Where firms exceed SNI thresholds but continue operating under SNI rules.

Reporting infrastructure gaps. Where MIF reporting is produced manually with associated risk of errors and timeline slippage.

Remuneration policy gaps. Where remuneration documentation has been updated but operational practices haven’t substantively changed.

Inadequate senior management engagement. Where ICARA is produced operationally without substantive board and senior management challenge.

Concentration risk under-assessment. Where firms with concentrated counterparty exposures don’t substantively assess concentration risk.

IFPR and Senior Recruitment

IFPR has substantially elevated the senior team requirements for UK investment firms:

• SMF2 (CFO) — primary owner of ICARA capital dimension and MIF reporting. See our SMF2 Guide
• SMF4 (CRO) — primary owner of ICARA risk dimension and stress testing methodology. See our SMF4 Guide
• Head of Capital / Capital Manager — operational leadership on K-factor calculation and capital planning
• Head of Regulatory Reporting — owning MIF reporting infrastructure and quality
• Head of Treasury — for liquidity management and capital actions
• Compliance specialists — for the broader IFPR conduct and remuneration framework

The candidate pool with substantive IFPR experience has tightened materially since the regime came into force. Strong candidates with hands-on ICARA production, K-factor calculation, and FCA dialogue experience are valuable in the market. For investment firm CFO recruitment specifically, see our Regulated CFO Recruitment page.

Further Reading and Authoritative Sources

For the FCA’s authoritative guidance on IFPR, see MIFIDPRU in the FCA Handbook. For the FCA’s broader IFPR pages, see the FCA IFPR pages.

Related Guides: Prudential, Risk and Authorisation

Part of FD Capital’s series of practical guides for FCA-regulated firms: ICAAP — Internal Capital Adequacy | Three Lines of Defence Model | Wind-Down Planning | FCA Threshold Conditions | How to Become FCA Authorised | FCA Application Process | SMF2 — Chief Finance Function | SMF4 — Chief Risk Officer Function | Wealth Management Compliance | Asset Management Compliance