The short answer
If you need to bridge an unfilled role full-time, you need interim management. If you need CFO capability permanently but cannot justify a full-time seat, you need CFO as a Service. A permanent hire only pays once the finance function permanently occupies more than one full-time person and the role can actually be filled. The three models differ less in qualification than in commitment, availability and cost structure.
The three models compared
| Criterion | Interim management | CFO as a Service | Permanent hire |
|---|---|---|---|
| Purpose | Bridge a vacancy, deliver a special project | Permanent finance leadership, part-time | Permanent finance leadership, full-time |
| Time commitment | Mostly full-time or close to it | A few days a month up to several days a week | Full-time |
| Typical duration | Several months to about a year | Ongoing, with adjustable scope | Open-ended |
| Time to start | Days to a few weeks | Days to a few weeks | Six to nine months including notice period |
| Billing | Day rate EUR 1,400–2,500 | Monthly retainer EUR 2,500–15,000 | Fully loaded annual cost EUR 140,000–300,000 |
| Commitment | Fixed term with a defined end | Adjustable at short notice | Employment contract with notice period |
| Knowledge transfer | Has to be planned deliberately | Team rather than individual; knowledge sits with the provider | Knowledge stays in the company |
| Risk | Dependence on one person | Dependence on the provider | A bad hire is expensive and slow to undo |
Where the fractional CFO fits
The term fractional CFO comes up constantly in enquiries from the startup world and describes the same model as CFO as a Service: permanent finance leadership on a part-time basis, billed as a monthly retainer of typically EUR 2,500 to 15,000, open-ended, with adjustable scope. The difference from an interim CFO is not qualification but involvement and ending: an interim CFO bridges a specific vacancy, usually full-time, on a day rate and with an end date defined from the outset – provider-placed mandates average 7.1 months according to the DDIM market study 2026. In the table above, the fractional CFO belongs in the CFO as a Service column. Which label fits which enquiry is covered in Fractional CFO, outsourced CFO, part-time CFO: what the terms actually mean.
Which model fits which situation
Startups and scale-ups
Before the first or second funding round, financial complexity grows faster than the team. What is needed is a plan that holds up, investor reporting, and a clean data basis for due diligence. A full-time CFO seat is rarely justified at that stage. CFO as a Service covers exactly that gap: strategic finance leadership at the scope the company currently needs.
The German Mittelstand
Here there is usually functioning bookkeeping but no steering layer above it. Typical triggers are succession, digitalisation of finance processes, a bank conversation, or a turnaround. Both models apply: interim management when a specific role is vacant, CFO as a Service when controlling and reporting still have to be built.
Groups and large companies
In established finance departments the question is fixed-term cover for individual roles: head of accounting during parental leave, project controlling for a system migration, consolidation during a transaction. That is classic interim management. What matters is that the person is productive on day one, not that they stay long term. How such a mandate runs in practice is set out in the article on roles, process and the first 90 days.
Private equity portfolio companies
After a closing, the finance function has to deliver on a sponsor's reporting calendar within weeks, not quarters. That is its own situation with its own mandate types, covered in Interim CFO in private equity and in the first 100 days after closing.
What the models cost
The three models are only comparable on a fully loaded basis. A permanent hire adds employer social contributions, bonus, workplace and recruiting on top of gross salary. Interim management is billed by the day, looks more expensive per day, and is often cheaper over a fixed-term engagement. CFO as a Service sits in between and scales with the scope drawn down.
Day rates in finance
The ranges below are market values from publicly available surveys for Germany, as of 2026. They show the order of magnitude in which serious offers sit. Rates broken down by role, trigger and billing model are in the detailed overview of interim day rates.
| Role | Day rate | Note |
|---|---|---|
| Interim CFO, head of finance | EUR 1,400–2,500 | Entry usually from around EUR 1,500 |
| Interim CFO in restructuring or a group environment | from EUR 3,000 | Turnaround, carve-out, transaction |
| Controlling | EUR 800–1,200 | Building reporting, project controlling |
| Accounting and financial reporting | EUR 880–1,120 | EUR 110–140 per hour; via a provider 25–35 % on top |
| HR leadership | EUR 800–1,500 | for comparison, outside finance |
For context: the DDIM market study forecasts an average day rate of EUR 1,317 across all functions for 2026, with around 12,500 interim managers in the market, utilisation of 81 percent and a market volume of roughly EUR 2.7 billion. Finance sits systematically above that average, because the role carries responsibility for the numbers.
CFO as a Service: monthly retainers
Where the task is not bridging a vacancy but buying CFO capability part-time on an ongoing basis, billing is usually a monthly retainer. Market range: EUR 2,500 to 15,000 per month, depending on whether it is a few days a month or several days a week. Sparring and a reporting review sit at the lower end, de facto finance leadership at the upper end. What a retainer contains depends on how the individual modules are cut.
Permanent hire: the fully loaded calculation
Gross salary is only part of it. The median for CFO positions in Germany is around EUR 114,400 a year according to StepStone salary data, with wide variation by region and company size. Adding employer contributions, bonus and workplace gives fully loaded annual costs of roughly EUR 140,000 to 190,000 in the classic Mittelstand and EUR 180,000 to 300,000 in the upper Mittelstand and group environment. On top comes recruiting at typically 25 to 30 percent of an annual salary – and six to nine months to fill the role including the notice period.
Worked example: six months of finance leadership
| Model | Basis | Cost over 6 months |
|---|---|---|
| Interim management | 4 days a week, around 104 billable days | EUR 146,000–260,000 |
| CFO as a Service | 1–3 days a week, monthly retainer | EUR 15,000–90,000 |
| Permanent hire | pro-rata fully loaded annual cost | EUR 70,000–160,000, but available at the earliest after 6–9 months |
The six-month comparison is deliberately unfair – and that is the point. A permanent hire is simply not available in that window. An honest calculation uses a 24-month horizon and counts the vacant months: six to nine months without finance leadership normally costs more than the premium on an interim day rate.
Where the calculation flips
A rough rule of thumb: as long as the monthly retainer for CFO as a Service stays below about EUR 12,000, it is cheaper than the fully loaded cost of your own seat. Above that, the permanent hire wins – provided the position can actually be filled and the workload genuinely occupies a full-time person.
For advisory services in Germany, BAFA funding may also apply. nugrow is listed with the BAFA as an approved consultancy.
Seven questions for any provider
- Who exactly will work on this – and with what experience in comparable companies?
- What happens if that person becomes unavailable?
- Which services are included in the price, and which are billed separately?
- How quickly can scope be adjusted up and down?
- What notice period applies?
- How is knowledge documented and handed over when the engagement ends?
- Which comparable projects can be given as references?
How the search works in practice – via providers, open platforms or your own network – is covered in the selection guide for interim CFOs.
Common mistakes in the selection
Looking only at the day rate. A cheap day rate does not help if onboarding takes twice as long. What matters is the cost to reach a result, not the cost per day.
Choosing the model before defining the problem. First settle whether a role is being bridged or a function is being built. The model follows from that.
Forgetting knowledge transfer. Without documented processes, the company is back where it started once the engagement ends.
Frequently asked questions
What is the difference between an interim CFO and CFO as a Service?
An interim CFO bridges a specific vacancy, usually full-time and for a clearly limited period. CFO as a Service means ongoing support on a part-time basis, at a scope that adapts to demand.
What does an interim CFO cost per day?
Day rates for an interim CFO in Germany run at EUR 1,400 to 2,500 across the market, with entry usually from around EUR 1,500. In restructuring and group projects EUR 3,000 and above is normal. The average across all interim functions is EUR 1,317 according to the DDIM market study 2026.
What does CFO as a Service cost per month?
Market range in Germany: EUR 2,500 to 15,000 per month, depending on scope. A few days a month for sparring and a reporting review sit at the lower end; several days a week with de facto finance leadership at the upper end.
How quickly can an interim manager start?
Interim managers are generally available at short notice and often start within a few days to two weeks – considerably faster than a regular permanent hire, which takes six to nine months including the notice period.
From what company size does an external CFO make sense?
Size is not the deciding factor; complexity is. As soon as financial planning, cash management and reporting can no longer be handled on the side by management or bookkeeping, external CFO capability pays. As a rule of thumb: below roughly EUR 12,000 monthly retainer it is cheaper than your own seat.
Does knowledge stay in the company?
Only if the contract says so. Documentation of processes and handover of models and reporting structures belong in the scope of work – not in the last week of the engagement.
Can an interim CFO work part-time or remotely?
Both are common, but it depends on the trigger. Restructuring, transactions and leading a larger finance team require presence and usually full-time. Bridging a vacancy in a settled team, investor reporting and project steering work on three days a week and largely remotely. Part-time and remote lower the day rate because utilisation and travel become predictable; once demand is permanently below three days a week, CFO as a Service is the better fit.
Read on
- Pricing: day rates and monthly retainers at a glance – all ranges by role, the three billing models and the worked example on one page.
- What does an interim CFO cost? – day rates by role, the three billing models and a worked six-month example.
- CFO as a Service: modules and pricing models – the six modules, the order that works and what retainers contain.
- How to find an interim CFO – the four routes to a provider and twelve selection criteria.
- Interim management in the finance department – what a mandate delivers and where it fails.
- Interim management for your finance function – how an engagement with nugrow actually runs.
- CFO as a Service at nugrow – how the modules are tailored to individual companies.
Sources
Day-rate ranges by function: Interim Profis. Market average, utilisation and market volume: DDIM market study 2026, published by the German interim management association DDIM. Entry day rate for interim CFOs: Robert Walters. Hourly and daily rates for accounting and the provider margin: Effizienzbuchhalter. CFO salary median: StepStone salary data Germany. All figures as of August 2026; they describe the market, not the terms of any single provider.
