Finance in an Investment Firm: The FC’s Remit

A Financial Controller in an FCA-authorised investment firm does everything an FC does anywhere — the close, the balance sheet, the statutory accounts, the audit — and then a second job on top of it. That second job is prudential: calculating own funds and the own funds requirement, deriving K-factors from data that lives in operational systems, submitting returns on the regulator’s calendar, and contributing to a document the FCA reads. Most firms underestimate how much of the role that becomes. This guide sets out what the FC actually owns in an investment firm, where the difficulty concentrates, and what the roles pay in 2026.

The prudential half

The Investment Firms Prudential Regime governs UK MiFID investment firms, and four workstreams follow from it. The FCA’s IFPR pages are the authoritative source, and our guide to regulatory capital, ICARA and the IFPR covers the framework.

Own funds. Determining what qualifies, by tier, after deductions — intangibles, deferred tax assets that rely on future profitability, holdings in financial sector entities. Straightforward arithmetic on a picture that has to be built carefully.

The own funds requirement — the higher of the permanent minimum requirement, the fixed overheads requirement and the K-factor requirement. The judgement lies in the fixed overheads calculation: what genuinely counts as a fixed overhead and what may be excluded is a decision the FC makes and documents.

K-factors. The activity-based measures — assets under management, client money held, client orders handled, and the risk-to-market and risk-to-firm factors where they apply. This is where the practical difficulty sits, because the source data lives in portfolio management, order management and client money systems that finance does not own. Extracting it reliably each period, and reconciling it, is frequently the heaviest recurring task in the role.

And liquid assets — the basic liquid assets requirement and whether the firm holds enough of the right kind.

The ICARA

The internal capital adequacy and risk assessment sits across finance, risk and compliance, and it is the workstream that most often has no clear owner. It requires the firm to identify the harms it could cause, assess whether own funds and liquid assets are adequate against them, plan an orderly wind-down, and document all of it to a standard a supervisor would accept.

The FC’s contribution is the financial modelling — capital and liquidity projections, stress scenarios, and the wind-down cost estimate — and in smaller firms the FC frequently ends up owning the whole document by default. Firms that treat the ICARA as an annual exercise rather than a maintained process find it painful; firms that keep the underlying analysis current find it routine. See MIFIDPRU and IFPR reporting skills for the capability question.

Client money, where it applies

Many investment firms hold client money under CASS 7 and custody assets under CASS 6, and where they do the FC’s remit extends again: the internal and external reconciliations, the client money requirement and resource calculation, acknowledgement letters, the breach register and the CASS audit relationship.

In smaller firms the FC is frequently also the CASS oversight function, preparing and reviewing their own work — a control weakness worth naming rather than assuming. Our guides to CASS and client money and CASS oversight versus operations cover the ground, and the reconciliation in practice the mechanics.

What changes in the monthly cycle

The close itself is recognisable, with four additions. The capital position becomes a monthly number rather than an annual one, and it belongs in the board pack — as our guide to regulatory capital in the management accounts sets out. Client money reconciliations run on their own frequency, unaffected by the close timetable. K-factor data has to be captured as the period closes rather than reconstructed. And the regulatory calendar overlays the management one, with submission dates that do not move for a difficult month. Our guide to the close at a regulated firm covers the wider changes.

Where firms struggle

Key-person concentration. The most common issue by a distance. One person understands the calculation, has built the spreadsheets, and knows why each judgement was made — none of it documented. The firm functions until they are unavailable in the wrong week.

Manual K-factor extraction. Assembled by spreadsheet each quarter from operational reports with no reconciliation trail. It works until a number is challenged.

The ICARA with no owner, assembled annually under pressure and reading like it.

Fixed overheads judgements undocumented, so the basis cannot be explained when the calculation is questioned a year later.

And prudential literacy assumed rather than built. A strong commercial FC can prepare excellent accounts and not know why an intangible is deducted from own funds. That is learnable, but it has to be recognised as a gap rather than assumed away.

Investment firm finance salaries 2026

Investment firm finance prices above the equivalent commercial role by roughly 10–15%, with prudential and CASS experience adding on top. Note that remuneration for material risk takers is subject to the FCA’s remuneration requirements including deferral and clawback, which changes the cash timing against an unregulated equivalent. Wider benchmarks are in our regulated-firm finance salary guide.

Hiring for the role

Three practical points. Specify the prudential half explicitly — a specification describing a standard FC role will attract commercial candidates who then discover the regime, and the mismatch surfaces at the first submission. Test the data question hard: where the K-factors come from and how they reconcile tells you more about whether someone can actually do this job than any amount of regime knowledge. And consider adjacent backgrounds — someone from a CRR or banking prudential environment, or from a consultancy that has advised on ICARAs, transfers well; a purely statutory background with no prudential exposure does not.

Qualification is the baseline — ICAEW, ACCA or CIMA — and audit-trained candidates who have audited investment firms are an under-used source. Our investment firm FC practice covers the search and hiring regulatory experience the wider specification question.