How to Brief an Interim Finance Search

The quality of the brief determines the quality of the shortlist. This is true of all finance recruitment, but it is especially true of interim finance where the speed of the market — the best available interim FCs and FMs are typically placed within five to ten working days of becoming available — means that a vague or incomplete brief will lose the strongest candidates to faster-moving, better-briefed searches before the shortlist is even produced. A well-constructed interim brief takes twenty to thirty minutes to write and consistently produces a better shortlist, a faster placement and a more successful engagement than one produced in five minutes.

This guide covers every element of an interim finance brief, why each element matters, what to include and what happens when each element is missing. It is written for CEOs, Finance Directors, HR professionals and PE investors who are briefing interim finance searches at Financial Controller, Finance Manager and senior finance level.

Why the Brief Matters More in Interim Than Permanent Search

In a permanent finance search, a vague brief is frustrating but recoverable — the recruiter can run a broad initial search, use the first round of CVs to calibrate the specification, and refine the brief before the interview stage. The permanent search timeline — typically eight to fourteen weeks from brief to start — accommodates this iterative approach. The interim search timeline does not. The interim professional who is at the top of the shortlist today may not be available in five working days because they have accepted an engagement from a faster-moving client.

The interim market is also more transparent than the permanent market. Experienced interim professionals know their market value precisely — they know what day rate is appropriate for the scope and sector, and they know whether a brief is realistic or whether the client’s expectations are misaligned with the market. A brief that specifies a Financial Controller scope at a Management Accountant day rate, or that asks for Big Four background at a regional rate, will be declined by the professionals most suited to the role within hours of the brief reaching the market. Pricing the brief correctly before it goes to market is as important as specifying the scope correctly.

The Ten Elements of an Effective Interim Brief

1. The Reason for the Requirement

The single most important context for an interim brief is why the requirement exists. The reason — a sudden departure, a systems implementation, a PE acquisition, a parental leave cover, a turnaround situation — tells the recruiter which specific profile of interim professional to approach and what the candidate’s first priorities in the role will be. An interim brief that does not explain why the role exists will attract candidates who are not prepared for the specific challenges the role involves.

Be specific and honest about the reason. If the requirement exists because the previous FC left under difficult circumstances, say so — experienced interim professionals are entirely accustomed to difficult situations and will be more effective if they know what they are walking into. If the reason is confidential for business or investor reasons, say that it is confidential but acknowledge that the situation is unusual; experienced interims can work with confidentiality requirements but need to know they exist. An interim who discovers on their first day that the situation is more complex than the brief suggested will start the engagement with a trust deficit that takes weeks to recover from.

2. The Scope of the Role

Describe specifically what financial management outputs the interim will be expected to own. This is more precise than a job title. ‘Interim Financial Controller’ covers roles that range from producing management accounts for a £5m SME to managing a group consolidation across twelve entities for a PE-backed platform. The scope description should cover: what the close process involves and what the close timetable is; what reporting is produced (management accounts, investor pack, board pack, statutory accounts); what the team structure is and who the interim will manage; what external relationships the interim will manage (bank, auditors, investors); and any specific projects or deliverables that are part of the engagement beyond the day-to-day responsibilities.

The most common scope description error is listing all the responsibilities the permanent hire will eventually have, rather than the specific responsibilities the interim needs to fulfil during the engagement period. If the interim is covering for a departed FC during a permanent search, the scope is what the departing FC was doing. If the interim is providing additional resource during a systems implementation, the scope is the project management and change management dimension alongside the normal close. Matching the scope description to the actual interim engagement rather than to the permanent role it is temporarily filling produces a better-matched candidate.

3. The Start Date

The start date is the most commercially critical element of the brief after the scope. In the interim market, availability is everything — the candidate who can start on Monday is fundamentally different from the candidate who can start in three weeks, even if their capability is identical. Be as specific as possible about the start date requirement, and distinguish between ‘we need someone on site by [date]’ and ‘our ideal start date is [date] but we could accommodate [date + one week]’. The latter gives the recruiter more flexibility to find the best available candidate rather than the best available candidate who can start on exactly the required date.

When the requirement is urgent — the FC has departed and the month-end is in ten days — say so explicitly. Experienced interim professionals and experienced interim recruiters can often compress the timeline significantly where the urgency is understood; a shortlist in 48 hours and an interview and offer in a single day is achievable when the urgency is clear. The brief that understates the urgency will receive a normal-pace search response to an urgent requirement.

4. The Expected Duration

The expected duration of the engagement matters for two reasons. First, it determines whether experienced professional interims will be interested — most professional interims target engagements of three months or longer because the setup cost of a new engagement (learning the business, the systems, the team) is recovered more efficiently over a longer period. A one-month engagement at standard day rates is less attractive to the most capable interims than a three-to-six-month engagement at the same rate. If the expected duration is genuinely short, acknowledge it in the brief and consider whether a higher-than-standard day rate is appropriate to compensate.

Second, the expected duration shapes the candidate’s approach to the engagement. An interim who knows they have four months will invest in process improvements, team development and institutional knowledge transfer that produces value beyond the immediate deliverables. An interim who believes the engagement is for six weeks will prioritise the immediate deliverables and will not invest in the longer-term improvements that take time to implement and take effect. Give a realistic estimate of the duration rather than the minimum possible duration, because underestimating produces an interim who does not invest sufficiently in the engagement.

5. The Day Rate Budget

Including the day rate budget in the brief — or at minimum a budget range — is strongly preferable to leaving the rate open. It prevents wasted time on both sides: the recruiter will not approach candidates whose market rate is significantly above the budget, and the candidates who receive the approach know that the rate discussion is within a realistic range. A brief without a rate indication typically produces a shortlist that includes candidates across a wide rate range, requires a rate negotiation at the offer stage that could have been avoided, and sometimes loses the preferred candidate because the rate was not aligned.

Day rate budgets for interim finance in London in 2025 range from approximately £250–£380/day for Management Accountant level to £700–£1,300/day for interim CFO, with interim FC typically at £400–£650/day depending on the complexity of the role and the business. PE-backed businesses and businesses in financial difficulty — where the interim requirement is most urgent and the candidate most specialist — consistently pay at or above the upper end of these ranges. Setting the day rate at the lower end of the range for a complex or urgent requirement will produce candidates who are less experienced than the role requires. See the Finance Team Costs guide for the full day rate benchmarks.

6. The Business and Sector Context

Provide the business context: revenue, ownership structure (owner-managed, PE-backed, listed), sector, number of entities, number of employees, accounting system in use, and any significant events on the horizon (an audit, a fundraising, an acquisition, a regulatory deadline) that will affect the interim’s priorities in the first few weeks. This context allows the recruiter to target interim professionals who have relevant sector or situation experience rather than casting the search broadly across all available interims.

Sector experience matters more for some interim requirements than others. An interim FC for a manufacturing SME needs different knowledge than an interim FC for an FCA-regulated fintech, and the shortlist for each should reflect the specific sector context. Where the business has a highly specific regulatory or technical context — CASS compliance for a financial services business, construction contract accounting for a housebuilder, fund accounting for an investment manager — specifying this as a requirement rather than a preference will focus the search on the candidates who are most immediately effective rather than those who will need a period of technical learning.

7. The Team and Reporting Structure

Describe the team the interim will manage — how many people, at what levels, what they are currently doing — and who the interim will report to. This tells the candidate what the management dimension of the role involves and enables the recruiter to target candidates who have managed teams of the right size and seniority. An interim FC who is used to managing a team of five will approach the role very differently from one who has been a solo FC at a smaller business, and both approaches may or may not be right depending on the specific team context.

The reporting line matters because it determines the seniority of the stakeholder relationship the interim needs to manage. An interim FC reporting to a CEO who is not finance-literate needs strong communication and education skills. An interim FC reporting to an experienced Finance Director needs a different profile — they can be more technically focused because the FD provides the stakeholder management. Specify the reporting line and give an honest characterisation of the line manager’s finance background.

8. The IR35 Status

Every interim engagement must have an IR35 assessment at the outset, and the result of that assessment — whether the engagement is inside or outside IR35 — is material to the candidate’s decision to accept. Most experienced professional interims working through a PSC will only accept engagements that are outside IR35. An engagement that is inside IR35 — where the business must deduct PAYE income tax and NI from the contractor’s fee — must carry a significantly higher gross day rate to produce the same net income for the professional, which materially increases the all-in cost to the business.

Where possible, complete the IR35 assessment before the brief goes to market. Use the HMRC CEST tool and retain the assessment documentation. Most genuine interim finance engagements at FC level will fall outside IR35, but the assessment must be completed and documented rather than assumed. Where the business is uncertain about the IR35 status, the recruiter or the business’s accountant or solicitor can advise before the brief is placed.

9. Interview Process and Decision Timeline

Specify the interview process: how many stages, who will be involved, what format (video or in-person), and what the decision timeline looks like from shortlist to offer. For an urgent interim requirement, the process should be as compressed as possible — a single thirty-to-forty-five minute video interview with the relevant decision-maker, followed by an offer on the same day if the candidate is right, is entirely achievable and is the approach that best candidates expect for urgent requirements.

The most common interim search failure is a business that has an urgent requirement but runs a two-stage interview process over two weeks before making a decision. The top candidates on the shortlist will not wait two weeks — they will accept other engagements. If the requirement is genuinely urgent, the interview process needs to reflect that urgency. If the CEO needs to be involved in the final decision but is travelling for two weeks, the interim search should either wait two weeks or delegate the decision to a senior direct report.

10. The Specific Deliverables in the First 30 Days

The most effective interim briefs include a specific description of what the interim will be expected to achieve in the first thirty days. This is not a job description — it is an engagement outcome definition. ‘Manage the June month-end close to within seven working days; complete balance sheet reconciliations for all major categories; present management accounts to the board on July 15th’ is an outcome definition. It tells the candidate exactly what success looks like in the first thirty days and enables the recruiter to assess whether the candidates on the shortlist have the specific capabilities to deliver those outcomes.

Outcome definitions also prevent the most common interim engagement failure mode — the interim who has been placed but who, in the absence of clear deliverables, defaults to their own view of what the role involves rather than what the business actually needs. The interim who has been told ‘manage the close and produce management accounts’ will produce management accounts. The interim who has been told ‘produce management accounts by day seven, with a full balance sheet reconciliation, in the board pack format attached, and present them to the CEO and the PE investor on day twelve’ will deliver exactly that.

Common Brief Failures and How to Avoid Them

What Happens After the Brief: The Search Timeline

Once Accountancy Capital receives a complete brief, the search process follows a consistent timeline. The brief is reviewed and validated on the day it is received — if elements are missing that would significantly affect the search quality, we will call to clarify before going to market. The initial market approach — direct calls to the most relevant available interim professionals in our network — begins on the same day the brief is received. A first shortlist of available, interested candidates is typically produced within 24–48 hours for Financial Controller and Finance Manager level requirements, and within 48–72 hours for Finance Director and CFO level.

The client interviews should ideally be conducted on the same day as or the day after the shortlist is received, and the offer should be made within 24 hours of the preferred candidate being identified. The total timeline from brief to offer for an urgent FC requirement — with a complete brief, same-day interviews and same-day offer — can be as short as three working days. The timeline from brief to the interim being on-site is typically five to eight working days at FC level.

The elements that most commonly extend the timeline beyond this are: brief received late in the week (candidates are harder to reach Friday afternoon to Monday morning); interview scheduling that requires multiple diaries to align (a two-interviewer panel with complex diary constraints can add three to five working days to the process); offer approval that requires sign-off from a person who is unavailable (the CEO who is travelling for two weeks cannot approve an interim offer in real time). Identify these potential delays before the brief goes out and address them proactively.

After the Placement: Confirming the Engagement

Once the preferred candidate has accepted the offer, confirm the engagement in writing as quickly as possible. The standard interim engagement documentation includes: a services agreement or statement of work between the client and the agency (covering the day rate, the agency margin, payment terms, notice period and IR35 status); a contract for services between the agency and the interim professional’s PSC; and a start date confirmation. Most established interim finance professionals and their PSCs have standard contract terms and can execute the documentation quickly — within twenty-four hours is typical for an experienced interim who has a standard PSC agreement in place.

Payment terms for interim finance engagements are typically weekly or monthly. Interims operating through PSCs typically invoice the agency weekly or fortnightly; the agency invoices the client on the same cycle or on a monthly consolidated basis. Agreeing payment terms before the brief is placed avoids the awkward discussion that occasionally arises when a client expects thirty-day payment terms on an interim engagement that the professional has been paid for within a week. Most professional interims expect payment within seven to fourteen days of invoicing; the client should factor this into their onboarding process and purchase order approval workflow.