The short answer
CFO as a Service is rarely bought as a package. It is bought in modules: bookkeeping, reporting and controlling, financial planning, cash management, investor and bank communication, process and systems. Market range for the monthly retainer in Germany: EUR 2,500 to 15,000, depending on scope. Sparring and a reporting review sit at the lower end; de facto part-time finance leadership at the upper end.
Rule of thumb: as long as the monthly retainer stays below roughly EUR 12,000, it is cheaper than the fully loaded cost of your own CFO seat.
The six modules
| Module | What it covers | Typical trigger |
|---|---|---|
| Ongoing bookkeeping | Financial accounting, receivables and payables, payments, coordination with the tax adviser | Growth, rising document volume, a departure in the team |
| Reporting and controlling | Monthly close, KPIs, plan-versus-actual, cost centres | First bank conversation, first investor, change of shareholder |
| Financial planning | Integrated model across P&L, cash and balance sheet; scenarios | Funding round, investment decision, budget process |
| Cash management | Rolling cash forecast, working capital, runway | Tight cash, seasonality, growth financing |
| Investor and bank communication | Reporting packs, covenant monitoring, preparing meetings | Existing financing, live round, refinancing |
| Processes and systems | Tool selection and implementation, approval flows, documentation | Excel hits its limits, the close takes too long |
The order the modules should come in
The most common mistake is starting at the top. A financial plan built on messy bookkeeping is a good-looking miscalculation. The sequence that works in practice:
- Establish the data basis. Bookkeeping current and reliable – without it, everything above is estimation.
- Set up reporting. A monthly close you believe, and five to ten KPIs that are actually steered.
- Plan cash. Rolling, at least 13 weeks. This is the number that prevents late-night phone calls.
- Build the financial plan. Only now is an integrated model worth it, because the assumptions hang on real numbers.
- Communicate outwards. Investors and banks get a pack that is fed by the reporting rather than rebuilt from scratch every time.
What the models cost
The figures below are market ranges from publicly available surveys for Germany, not one provider's price list. If instead you need to bridge a full-time vacancy, the corresponding interim management day rates are covered in a separate article.
| Scope | Monthly retainer | What that covers |
|---|---|---|
| A few days per month | EUR 2,500–5,000 | Sparring, reporting review, managing the tax adviser |
| One day per week | EUR 5,000–9,000 | Ongoing controlling, financial planning, bank meetings |
| Two to three days per week | EUR 9,000–15,000 | De facto finance leadership, fundraising support |
For comparison: the median for CFO positions in Germany is around EUR 114,400 gross per year according to StepStone salary data. Adding employer social contributions, bonus and workplace gives fully loaded annual costs of roughly EUR 140,000 to 190,000 in the Mittelstand – about EUR 12,000 to 16,000 a month, plus a one-off 25 to 30 percent of an annual salary for recruiting and six to nine months until the seat is filled.
Three pricing models and when each fits
Monthly retainer per module. The standard. Predictable, and modules can be switched on and off individually. Pay attention to what is expressly not included – the annual financial statements, special projects and system implementations usually are not.
Day rate. Sensible where demand fluctuates and in the opening phase, while scope is still unclear. Usually more expensive than a retainer later on.
Fixed project price. For bounded work such as a financial model or a system implementation. Needs a clean statement of work, otherwise it ends in change requests.
Six questions for any provider
- Which modules are included in the retainer – and which are expressly not?
- Who exactly does the work, with what experience in comparable companies?
- How quickly can scope be adjusted up and down?
- What notice period applies?
- Who owns the models, templates and analyses after the contract ends?
- What happens if the responsible person becomes unavailable?
Question five is the one most often overlooked and the most expensive. If the model and the reporting stay with the provider, the work starts from zero at the next change. A full set of selection criteria is in a separate article.
Where the calculation flips
CFO as a Service pays as long as the finance function does not permanently occupy a full-time person. Three signs the point has been reached: the monthly retainer is approaching EUR 12,000. The external person is effectively on site every day. And tasks keep arising that require internal presence – leading a growing finance team, for instance.
Conversely, the model stays sound where demand fluctuates, where specialist knowledge is only needed in phases, or where the position simply cannot be filled in the market – which happens in the Mittelstand more often than the salary tables suggest.
Frequently asked questions
What does CFO as a Service cost per month?
Market range in Germany: EUR 2,500 to 15,000 per month. A few days a month for sparring and a reporting review sit at the lower end; two to three days a week with de facto finance leadership at the upper end.
What services does CFO as a Service include?
Typically six modules: ongoing bookkeeping, reporting and controlling, financial planning, cash management, investor and bank communication, and process and system work. They are combined individually rather than bought as a package.
Where should you start?
With the data basis. A financial plan built on messy bookkeeping is a good-looking miscalculation. Bookkeeping first, then reporting, then cash, then planning.
At what point does your own CFO seat make sense?
As a rule of thumb from around EUR 12,000 monthly retainer – at that point the model approaches the fully loaded cost of your own position. Provided the role can actually be filled and the workload genuinely occupies a full-time person.
What is the difference from interim management?
Interim management bridges a specific vacancy, usually full-time and clearly time-limited. CFO as a Service is ongoing part-time support with adjustable scope.
Does CFO as a Service replace the tax adviser?
No, the roles complement each other. The tax adviser is responsible for the annual financial statements, tax returns and tax assessment; CFO as a Service is responsible for ongoing financial steering: monthly close, KPIs, cash forecasting, financial planning and communication with banks and investors. In practice the external CFO handles coordination with the tax adviser and makes sure bookkeeping and the close are set up so the numbers can be steered during the year – not only once the annual accounts are done.
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.
- Interim CFO, CFO as a Service or a permanent hire? – the three models compared on time to start, commitment and cost structure.
- What does an interim CFO cost? – day rates by role and a worked six-month example.
- How to find an interim CFO – four routes to a provider and twelve selection criteria.
- CFO as a Service at nugrow – how the modules are cut in practice.
Sources
Monthly retainers and fully loaded cost of a permanent hire: MRH Beratung. CFO salary median: StepStone salary data Germany. Day-rate ranges: Interim Profis and the DDIM market study 2026. All figures as of August 2026; they describe the market, not the terms of any single provider.
