Sparring for Finance Teams: When It Makes Sense to Bring in Additional Senior Staff in Controlling

Your controller delivers the numbers on time every month—but no one on the team asks what those numbers actually mean. That’s exactly where the problem begins—one that many scaleups don’t recognize until it’s too late: A finance team can be strong from an operational standpoint and still lose influence if no one is there to provide the feedback that turns reporting into real management.

When the finance team grows, but not its expertise

In the seed and early growth phases, a strong operational controller or accountant who delivers accurate numbers is usually sufficient. However, with each additional funding round, each new investor, and each additional cost center, the requirements change: It’s no longer enough to simply produce numbers—someone must analyze them, scrutinize them, and translate them into strategic decisions.

It is precisely this level of seniority that is lacking in many teams, because expertise does not always grow automatically as part of the hiring process. Yet it is precisely this in-depth knowledge and experience that is most urgently needed.

What's missing when there's no peer review in controlling?

Without experienced sparring partners in Controlling, typical symptoms emerge: Reports are presented but not discussed. Variances between plan and actual are documented but not explained. Investors ask questions at board meetings that no one on the team is prepared for. And strategic decisions—such as a new cost center, a price change, or a hiring freeze—are made without Finance first providing a well-founded assessment.

The problem is rarely a lack of competence in day-to-day operations. It is the lack of experience in recognizing patterns in the numbers before they become a problem.

That is exactly what the term “business partnering” describes: Finance becomes a sparring partner for management, actively analyzing the numbers—rather than just providing reports.

The Signs: When Additional Financial Expertise Is Truly Necessary

• Reports are delivered on time, but no one interprets the numbers from a strategic perspective
• Questions from investors during board meetings regularly throw the team off balance
• Important financial decisions go directly to the founder or CEO without being filtered.
• The next round of financing, or financial due diligence, is coming up, and no one has ever gone through this process before
• The current team is working at full capacity and does not have the bandwidth to engage in strategic brainstorming on the side

Do you recognize one or more of these patterns? If so, additional expertise is no longer just a nice-to-have—it’s a matter of risk management.

Interim Controlling vs. Fractional CFO: What's the Difference?

Both roles bring deep expertise to the team, but with different responsibilities.

Interim controlling typically fills a specific operational gap—such as during a vacancy, an acute capacity shortage, or when setting up new controlling structures. The focus is on implementation: KPI reporting, FP&A tasks such as forecast maintenance and budget reconciliation, as well as the reporting structure.

A Fractional CFO operates at a higher level: providing strategic guidance to founders and management, and putting the numbers into context for fundraising, M&A, or growth strategy—without the need to bring a full-time CFO on board right away. Both models can be viewed as “Finance-as-a-Service”: temporary access to senior expertise, rather than lengthy recruiting processes.

The choice between the two rarely depends solely on the size of the company, but rather on the specific gap: Is there a lack of operational capacity in controlling, or a lack of strategic oversight at the CFO level?

What Good Sparring in Controlling Actually Achieves

• Plan-actual variances (variance analysis) are not only presented but also explained and linked to possible courses of action
• KPI reporting and investor reporting are prepared in advance, rather than improvised at the last minute before the board meeting
• Budgeting, forecasting, and scenario planning are part of a regular routine, not one-off tasks done before the next meeting
• Critical assumptions in the forecast are actively scrutinized before they become blind spots
• The existing team is coached rather than simply replaced or supplemented
• Founders and management get a second, experienced opinion on financial decisions before they are made

How to Find the Right Sparring Partner for Your Finance Team

Not every scaleup needs a fractional CFO right away. The right question is: Where exactly does the chain between numbers and decision-making break down? If the gap lies in operational controlling, targeted reinforcement there will help. If it lies at the strategic level—investor pitch, capital structure, M&A preparation—you need guidance at the CFO level. It’s important to clearly identify this gap rather than simply hiring “more people.”

When External Support Is Advisable

Whether it’s interim controlling, a fractional CFO, or setting up finance operations—at its core, all of this is temporary finance consulting, tailored to the specific need. A one-time interim CFO or controlling assignment fills acute capacity gaps without immediately creating a new full-time position. If strategic sparring is needed at the executive level—for example, ahead of a funding round, during M&A projects, or when preparing for investor readiness—a fractional CFO is the right solution. If processes and tools in controlling also need to be overhauled, a targeted finance operations setup helps establish structures that can grow alongside the team.

Conclusion: Seniority is not a luxury, but rather a form of risk management

A finance team that merely provides numbers but has no one to interpret them loses its ability to act precisely when it matters most—before the next funding round, when faced with a critical question from investors, or during a tight cash flow situation. An additional Spanning Partner in financial control is therefore rarely a cost factor, but rather insurance against precisely these moments.

Want to find out if your finance team is currently lacking the right level of seniority? In a no-obligation finance consultation, we'll take a look at your setup together and identify where coaching will have the greatest impact.