Insights: Guides from 15 years of interim mandates
What decision-makers want to know before an interim CFO mandate, answered in numbers rather than adjectives: cost, alternatives, the first 90 days after the financing round, ERP projects that must not fail, and AI in finance. Written by Ruben Faust, interim manager since 2011, more than 30 years in finance, almost 18 of them at Coca-Cola.
What does an Interim CFO cost?
Daily rates of €1,200–2,500, what drives the rate, a worked example for a full mandate and the comparison with a permanent hire.
Interim CFO, fractional CFO, consultant or permanent hire?
Four models, four use cases: who carries responsibility, who executes, who stays, and what each costs.
Building the finance function after Series A: the first 90 days
Sequence, priorities and pitfalls when building accounting, controlling, reporting and FP&A to investor standard.
ERP implementation in a scale-up: why projects fail
Six systems implemented, 6 to 9 months on average: what a CFO as project lead does differently from IT alone.
AI in finance: what really works and what does not
Data base self-test, five tasks with mandate figures, what does not work, costs and the duties under the EU AI Act. No tool guide.
Why do ERP, controlling and the board report never reconcile?
Six causes in process, data and tool, a good state in numbers, what master data cleansing and process mining contribute. From three mandates in 2026.
Why does the month-end close take 12 working days, and how do we get to 5?
Seven causes, a closing calendar, what invoice processing and accrual routines contribute and what they do not. From a 2026 mandate.
What must our finance department do under the EU AI Act since August 2026?
Deadlines, the deployer role, AI literacy under Art. 4, transparency under Art. 50, fines and five steps for the inventory. Not legal advice.
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The FAQ answers 27 questions about the interim CFO, the Results show 15+ documented mandates. For everything else: a 30-minute first call, without obligation.
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