How to Brief an Interim Finance Search

The quality of the brief determines the quality of the shortlist. That is true of all finance recruitment, but especially of interim finance, where the speed of the market means a vague or incomplete brief loses the strongest candidates to faster-moving, better-briefed searches before the shortlist is even produced. The best available interim FCs and Finance Managers are usually between assignments for days rather than weeks. 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 written in five minutes.

This guide covers every element of an interim finance brief, why each matters, what to include and what happens when it is missing. It is written for CEOs, Finance Directors, HR professionals and PE investors briefing interim searches at Financial Controller, Finance Manager and senior finance level. For permanent hires, our sister guide on how to brief a finance recruitment agency covers the foundations — business context, the finance function, salary and choosing an agency — and this page builds on it for interim work.

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 CVs to calibrate the specification and refine the brief before interviews. A permanent search typically takes eight to twelve weeks from brief to start once notice periods are included — see how long it takes to hire a Financial Controller — and that timeline accommodates an iterative approach. The interim timeline does not. The interim at the top of the shortlist today may not be available next week because they have accepted an engagement from a faster-moving client.

The interim market is also more transparent than the permanent market. Experienced interims know their market value precisely: what day rate fits the scope and sector, and whether a brief is realistic. A brief that specifies a Financial Controller scope at a Management Accountant day rate, or asks for a Big Four background at a regional rate, will be declined by the professionals best suited to the role within hours of reaching the market. Pricing the brief correctly before it goes out 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, parental leave cover, a turnaround — tells the recruiter which profile of interim to approach and what the candidate’s first priorities will be. A brief that does not explain why the role exists will attract candidates who are not prepared for its specific challenges. Our situation guides cover the common cases, including interim cover after a senior finance departure and interim FCs for systems implementations.

Be specific and honest. If the previous FC left in difficult circumstances, say so; experienced interims are 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 and acknowledge that the situation is unusual. An interim who discovers on day one that the situation is more complex than the brief suggested starts the engagement with a trust deficit that takes weeks to recover from.

2. The Scope of the Role

Describe specifically which financial outputs the interim will own. This is more precise than a job title: “Interim Financial Controller” covers everything from producing management accounts for a £5m SME to running a group consolidation across twelve entities for a PE-backed platform. The scope should cover what the close involves and its timetable; what reporting is produced (management accounts, investor pack, board pack, statutory accounts); the team structure and who the interim will manage; which external relationships they will handle (bank, auditors, investors); and any projects or deliverables beyond the day-to-day.

The most common scope error is listing everything the permanent hire will eventually do rather than what the interim needs to deliver during the engagement. If the interim is covering a departed FC during a permanent search, the scope is what the departing FC was doing. If they are extra resource during a systems implementation, the scope is the project and change management work alongside the normal close. Matching the description to the actual interim engagement produces a better-matched candidate.

3. The Start Date

After scope, the start date is the most commercially critical element. In the interim market availability is everything: the candidate who can start on Monday is fundamentally different from one who can start in three weeks, even with identical capability. Be specific, and distinguish between “we need someone on site by [date]” and “our ideal start is [date] but we could accommodate a week later”. The latter lets the recruiter find the best available candidate rather than the best candidate who happens to be free on exactly that day.

When the requirement is urgent — the FC has gone and month-end is in ten days — say so explicitly. Experienced interims and interim recruiters can compress the timeline significantly when the urgency is understood: candidates within days, and an interview and offer in a single day, are achievable. A brief that understates urgency gets a normal-pace response to an urgent requirement.

4. The Expected Duration

Duration matters for two reasons. First, it determines whether experienced interims will be interested. Many target engagements of three months or longer, because the set-up 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 a standard day rate is less attractive to the most capable interims than three to six months at the same rate. If the duration is genuinely short, say so and consider whether a higher rate is appropriate; short assignments typically price higher per day because the interim carries the gap before their next engagement.

Second, duration shapes the interim’s approach. An interim who knows they have four months will invest in process improvements, team development and knowledge transfer that create value beyond the immediate deliverables. One who believes the engagement is six weeks will focus on the immediate deliverables only. Give a realistic estimate rather than the minimum possible duration, and say whether there is an option to extend.

5. The Day Rate Budget

Including a day rate budget — or at least a range — is strongly preferable to leaving the rate open. The recruiter will not approach candidates priced well above budget, and the candidates approached know the rate discussion is realistic. A brief without a rate indication typically produces a shortlist across a wide rate range, a negotiation at offer stage that could have been avoided and, sometimes, a lost preferred candidate.

Typical London day rates for interim finance run from about £250–£375 for a Management Accountant and £300–£450 for a Finance Manager to £400–£650 for an interim Financial Controller and £750–£1,300 for an interim CFO, with lower ranges regionally — an interim FC is typically £350–£550 in the South East and £310–£490 in the Midlands and North. These are the ranges on our interim finance day rate card, with more detail in the interim Financial Controller rates guide. PE-backed businesses and businesses in financial difficulty, where the requirement is most urgent and the candidate most specialist, usually pay at or above the upper end. Setting the rate at the bottom of the range for a complex or urgent requirement will produce candidates less experienced than the role needs. The finance team costs guide compares interim rates with the cost of permanent staff.

6. The Business and Sector Context

Provide the business context: revenue, ownership (owner-managed, PE-backed, listed), sector, number of entities and employees, the accounting system, and any significant events on the horizon — an audit, a fundraising, an acquisition, a regulatory deadline — that will shape the interim’s first weeks. This lets the recruiter target interims with relevant sector or situation experience rather than casting the search across everyone available.

Sector experience matters more for some requirements than others. An interim FC for a manufacturing SME needs different knowledge from one for an FCA-regulated fintech. Where the business has a highly specific regulatory or technical context — CASS for a financial services firm, construction contract accounting for a housebuilder, fund accounting for an investment manager — specify it as a requirement rather than a preference, so the search focuses on candidates who are effective immediately. Our guide to fractional and interim finance in FCA-regulated firms covers the regulated case.

7. The Team and Reporting Structure

Describe the team the interim will manage — how many people, at what levels, doing what — and who the interim will report to. This tells the candidate what the management dimension involves and lets the recruiter target people who have managed teams of the right size. An interim FC used to managing five people will approach the role very differently from one who has been a solo FC, and either may or may not be right for your team.

The reporting line determines the seniority of the stakeholder relationship. An interim FC reporting to a CEO who is not finance-literate needs strong communication and explanation skills; one reporting to an experienced Finance Director can be more technically focused because the FD handles stakeholder management. Specify the reporting line and give an honest picture of the line manager’s finance background.

8. The IR35 Status

Every interim engagement through a limited company needs an IR35 assessment at the outset, and the result — inside or outside — is material to the candidate’s decision. Under the off-payroll rules, a medium or large client is responsible for deciding the status and must give the contractor and agency a status determination statement explaining its reasons; where the client is small, the interim’s own company decides. Many experienced interims working through their own company prefer outside-IR35 engagements. If an engagement is inside IR35, the fee-payer — usually the agency — deducts income tax and National Insurance before paying the interim’s company, so the gross rate generally needs to sit higher in the band to attract the same calibre, which increases the cost to the business.

Where possible, complete the assessment before the brief goes to market. HMRC’s guidance on understanding off-payroll working (IR35) is the primary source, and its Check Employment Status for Tax (CEST) tool is a sensible first test; keep the documentation. Genuine interim assignments with a defined scope, an independent professional and no ongoing employment-style control are often assessed as outside IR35, but every engagement must be assessed on its own facts rather than assumed. If you are unsure, the recruiter or your accountant or solicitor can advise before the brief is placed, and our guides to IR35 and employment tax and umbrella, PSC and fixed-term interim finance explain the options.

9. Interview Process and Decision Timeline

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

The most common interim search failure is an urgent requirement run through a two-stage process over two weeks. The top candidates will not wait two weeks; they will accept other engagements. If the CEO must be involved in the final decision but is travelling for a fortnight, either wait or delegate the decision to a senior direct report.

10. The Specific Deliverables in the First 30 Days

The most effective interim briefs say what the interim must achieve in the first thirty days. This is not a job description but an outcome definition: “Manage the June close to within seven working days; complete balance sheet reconciliations for all major accounts; present management accounts to the board on 15 July.” It tells the candidate what success looks like and lets the recruiter assess whether shortlisted candidates can deliver it.

Outcome definitions also prevent a common failure: the interim who, without clear deliverables, defaults to their own view of the role rather than what the business needs. Told “manage the close and produce management accounts”, an interim will produce management accounts. Told “produce management accounts by day seven, with a full balance sheet reconciliation, in the attached board pack format, and present them to the CEO and the PE investor on day twelve”, they will deliver exactly that. Our guide to managing your interim Financial Controller covers how to support those first thirty days once the interim starts.

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 follows a consistent pattern. We respond the same working day and review the brief on receipt; if elements are missing that would significantly affect the search, we call to clarify before going to market. The initial market approach — direct calls to the most relevant available interims in our network — begins the same day, and a shortlist of available, interested candidates follows within days. Each candidate comes with a note on relevant assignments, availability, day rate and how they would approach the first two weeks. The process is the same whether the role is with us at interim Financial Controller or Finance Manager level; interim CFO and FD searches often run with our sister firm FD Capital.

Client interviews should ideally take place on the day the shortlist arrives or the day after, and the offer should follow within a day of identifying the preferred candidate. With a complete brief, prompt interviews and a quick decision, the interim can typically start within days of your decision.

The things that most often stretch the timeline are: a brief received late in the week (candidates are harder to reach from Friday afternoon to Monday morning); interviews that need several diaries to align (a two-interviewer panel with diary constraints can add several working days); and offer approval that depends on someone unavailable (a CEO travelling for two weeks cannot approve an offer in real time). Identify these before the brief goes out and deal with them in advance.

After the Placement: Confirming the Engagement

Once the preferred candidate accepts, confirm the engagement in writing quickly. Standard interim documentation includes a services agreement between client and agency (day rate, payment terms, notice period and IR35 status), a contract for services between the agency and the interim’s company, and a start date confirmation. Our fees are agreed in writing before the search starts, and agencies supplying interims work within the rules for employment agencies and businesses. Most established interims have standard terms and can sign quickly — often within a day.

Interims working through their own companies typically invoice the agency weekly or fortnightly, and the agency invoices the client on the same cycle or monthly. Agree payment terms before the brief is placed: it avoids the awkward discussion when a client expects thirty-day terms on an engagement where the interim expects payment within seven to fourteen days of invoicing. Factor this into onboarding and purchase order approval. Plan the end as well as the start — notice, the permanent search and the eventual handover are covered in our interim finance handover guide.

Interim Brief Checklist

Before you send the brief, check it answers each of these in a line or two:

• Why does the role exist, and is anything sensitive about the situation?
• Which outputs will the interim own during the engagement?
• The latest acceptable start date, and the realistic duration with any extension option.
• The day rate or range, and the IR35 determination.
• Revenue, ownership, sector, entities, system and key events in the next 90 days.
• Team size, reporting line and the line manager’s finance background.
• Interview stages, decision-maker and the dates they are available.
• What must be delivered in the first thirty days.

If the need is part-time and ongoing rather than full-time cover, a fractional appointment may suit better — see interim vs fractional finance.

Briefing an Interim Search: FAQs

How quickly can you find an interim?

We respond the same working day and typically put forward available interim candidates within days of a complete brief.

Who decides IR35 status?

For medium and large clients, the client decides and issues a status determination statement. For small clients, the interim’s own company decides.

Should we put the day rate in the brief?

Yes, or at least a range. It keeps the shortlist realistic and avoids losing your preferred candidate at offer stage.

Can you run the permanent search at the same time?

Yes. Permanent shortlists typically follow within one to two weeks, and briefing both together lets the interim’s end date be set around the permanent start.