Interim Accountant & CFO

Finance leadership gaps rarely arrive on schedule. A finance director resigns mid-audit, a maternity cover falls through, a fundraise or acquisition suddenly demands modelling firepower your team doesn't have. Meanwhile, growing businesses often need CFO-level thinking years before they can justify a CFO-level salary.

Acumon's interim and part-time service fills both gaps. Our experienced professionals step into your business quickly, take ownership from day one and stay exactly as long as you need — a few days a month of strategic input, or full interim cover through a transition. And because they come from a full-service firm rather than working alone, every assignment carries tax, audit and advisory expertise behind it.

Part-Time CFO and Finance Director Support

For businesses that need strategic financial leadership but not a full-time hire, our part-time CFO service provides it on your terms — from one day a month to several days a week. Your CFO builds the budgets, forecasts and financial models that drive decisions; produces board packs and attends board meetings; manages cash flow and banking relationships; and leads funding rounds, investor reporting and lender negotiations.

Just as importantly, they raise the bar for the whole finance function: sharpening controls, improving the quality and speed of management information, and developing your in-house team so the business steadily needs less external help, not more.

Interim Cover for Finance Roles

When a finance director, financial controller or senior accountant leaves or takes extended leave, we provide interim professionals who keep the function running without missing a beat — management accounts produced on time, payroll and VAT overseen, year-end and audit deadlines met, and the team managed and supported.

Interim cover works for maternity and sick leave, sabbaticals, sudden resignations and the gap while you recruit permanently. When your permanent hire arrives, we deliver a structured handover rather than a cliff edge — documented processes, clean ledgers and a briefed successor.

Transaction and Project Support

Some assignments are about a project, not a vacancy. Our people lead finance system selections and migrations, prepare businesses for their first audit, build the financial models behind a fundraise, and provide the extra senior capacity that an acquisition, disposal or due diligence process demands. Because Acumon also provides M&A advisory, due diligence and valuation services, your interim professional can call on genuine transaction specialists rather than improvising.

When Interim Support Makes Sense

The pattern we see most often: a scaling business whose bookkeeper is out of depth but which isn't ready for a six-figure finance hire; an established company bridging the gap between finance leaders; a founder preparing for investment who needs credible numbers and someone to stand behind them in front of investors; or a group needing safe hands through a restructuring or system change. If any of those sound familiar, a conversation costs nothing — we'll tell you honestly whether you need two days a month or a full-time appointment.

Backed by a Full-Service Firm

An independent contractor brings one person's experience. An Acumon interim brings the firm's: tax questions answered by our in-house Chartered Tax Adviser, technical accounting questions resolved by our audit specialists, payroll and company secretarial support on tap. There is no single point of failure — illness or holiday never leaves your finance function unattended — and the quality of the work is backed by a regulated, ICAEW-registered firm rather than a CV.

What You Get With Acumon

• Part-time CFO support from one day a month upwards, scaled to your needs
• Interim FD, financial controller and senior accountant cover through transitions
• Management accounts, board packs, budgets and rolling cash flow forecasts
• Fundraising support: financial models, investor packs and lender presentations
• Finance systems selection, implementation and process improvement
• Structured handover to your permanent hire when the assignment ends
• Access to Acumon's tax, audit and advisory specialists throughout

Why Acumon for Interim Accountant & CFO?

• Part of a full-service firm of Chartered Accountants with 90+ UK-based professionals
• In-house Chartered Tax Adviser and specialist audit team available to every assignment
• ICAEW-registered firm — regulated quality behind every interim placement

Get a Fixed-Fee Quote

Tell us what you need and we'll come back within one business day with a clear scope and a fixed price — no hourly-rate surprises. Call 020 8567 3451 or use the form and we'll be in touch.