The short answer
Three things belong in the contract before the start, not in a conversation afterwards:
- Cover in case of absence. If the person engaged drops out, the provider supplies a replacement from the network. Without that commitment the company carries the risk alone.
- Replacement in the opening window. If the person does not fit professionally or personally, they are replaced within a defined period at the start of the mandate at no additional cost.
- A short notice period. An interim mandate is a fixed-term appointment. Whoever no longer needs it should be able to end it at short notice.
At nugrow all three points are part of the agreement. The response time, the length of the opening window and the notice period are stated concretely in the proposal – they depend on role, term and workload, and are therefore not promised as a blanket but agreed in writing.
Why this is a question at all
We looked at twelve German providers in the interim CFO market to see whether they make any form of commitment. Exactly one does. All the others are silent on the point that comes up in every second first call.
That is explainable: a commitment costs when it is called. But it is also the only answer to the biggest objection against an external appointment – that you are relying on someone you do not know, in a situation where mistakes are expensive.
The difference between absence and wrong fit
Absence is illness, accident or a break-off for personal reasons. It hits every appointment, permanent ones included. The difference is whether someone steps in.
With a directly engaged individual there is nobody. In the middle of the annual close, a due diligence or a covenant deadline that is the most expensive line in the whole calculation – more in provider or freelancer directly.
Wrong fit is something else: the person can do what they are meant to do, but it does not work – with the team, with the shareholder, with the way decisions get made in the company. That shows in the first weeks or not at all. That is why an opening window is the right mechanism, not an open-ended satisfaction guarantee.
What a commitment does not cover
Honesty here matters more than a grand formulation. A replacement commitment does not cover:
- Changed requirements. If the brief shifts mid-mandate – a bridge turns into a restructuring – that is not a case for replacement but for a new agreement.
- Missing input. If data, access or decisions do not arrive from inside the company, the result is not down to the appointment.
- Results nobody can promise. An interim CFO can be accountable for a close on a fixed date. They cannot guarantee that a bank extends or a buyer pays.
Whoever promises the opposite is promising something they cannot keep.
What makes a replacement case unlikely
The best risk reversal is the one that is never called. Four things lower the probability noticeably:
- A brief that describes a result, not presence. What should exist at the end, reviewed by whom?
- Decision rights settled before the start. What does the appointment decide, what stays with management or the fund? The most common point of friction of all.
- A review date after four to six weeks at which both sides say what works and what does not – fixed in the calendar, not on demand.
- A named critical date at which it shows whether it holds: the next close, the next shareholder meeting.
The checklist for that is in CFO handover and vacancy.
Frequently asked questions
What happens if the interim CFO drops out?
The provider supplies a replacement from the network. The response time is agreed in the proposal and depends on role and availability. Without such a commitment the company carries the absence risk alone.
What if the person fits professionally but not personally?
That is what the opening window is for: replacement at no additional cost within a defined period at the start of the mandate. After that the agreed notice period applies.
How long is the notice period?
It is set in the proposal and is deliberately short for an interim mandate – the fixed-term appointment should be endable when it is no longer needed. A running monthly retainer has its own rules.
Is there a success guarantee?
No, and nobody should give one. Commitments can be made on availability, cover and replacement. Results that depend on banks, buyers or markets cannot be guaranteed.
What if we want to end the mandate early because the situation has eased?
That is the normal case, not a dispute. That is exactly why the notice period is short.
Read on
- Contract and bogus self-employment – what else belongs in the contract.
- Liability, NDA and data access – the other half of the safeguards.
- Briefing a mandate and comparing proposals.
- Interim CFO · Pricing.
Sources and status
The statement on the market is based on our own review of twelve German providers in September 2026; we checked whether a commitment is published on the website. The commitments described here apply to nugrow mandates; response times and scope are agreed in the proposal. Status: September 2026. This article is an overview and does not replace legal advice.