Over 90% of interim managers make an impact in less than 3 months

Temporarily hired, strategically deployed: Interim managers deliver faster and more lasting impact than many assume. 

Interim managers are typically brought in during periods of change, growth, or crisis. But how quickly do they really make an impact? And where does their true added value lie for organisations? 

A recent survey by global talent solutions specialist Robert Walters among interim managers and business leaders in Belgium shows that interim management today goes far beyond short-term cover. It is about targeted impact, structural improvement, and strategic reinforcement. 

Impact from day one 

Almost half of the interim managers surveyed (49.8%) report delivering tangible results within the first month. Another 41% do so within one to three months. In other words, more than 90% make a visible difference within the first quarter. 

Assignments most commonly last 6-12 months (38%), followed by 12-18 months (25%) and 18-24 months (22%). This underlines that interim management is rarely a brief stopgap solution, but rather a focused reinforcement with clearly defined objectives. 

“Organisations today expect both speed and quality,” says Asia Skifati, Director at Robert Walters. “Interim managers have limited time to build trust and deliver results. Their experience and expertise enable them to set priorities quickly and add value from the outset.” 

Process optimisation as the main lever 

In nearly half of all assignments (44%), the greatest impact lies in process optimisation and efficiency improvements. Crisis management and business recovery follow (19%), ahead of cultural change and team alignment (14%). Strategy development, digital transformation, talent development, and cost reduction are less frequently cited as the primary focus. 

“The biggest gains are often achieved by streamlining processes and creating clarity,” Asia Skifati emphasises. “Once that foundation is in place, organisations can move forward with broader strategic initiatives such as digitalisation or growth.” 

Success goes beyond ROI 

Interim managers are primarily assessed on achieving project milestones (41%), followed by team performance and morale (19%) and financial impact (16%). Business leaders also highlight the importance of long-term process improvements and knowledge transfer to internal teams. Financial impact matters, but it is not the sole benchmark. 

“This confirms that interim management is not just a cost discussion,” Asia Skifati explains. “It is about delivering concrete results while strengthening the organisation in a sustainable way. ROI is important, but the lasting change an interim manager creates is often even more valuable.” 

Strategic value beyond the assignment 

Interim managers do more than execute a clearly defined project.

77% of organisations surveyed see them as a source of external best practices and market benchmarks, and the majority regard them as key drivers of change and transformation. 

More than half (54%) observe that interim managers actively transfer knowledge to internal teams, ensuring that expertise remains in place after the assignment ends. For 38%, their added value lies in providing objective advice to senior leadership. 

“In practice, we see that interim managers play a dual role,” says Asia Skifati. “They deliver concrete results while also bringing an independent perspective that challenges existing assumptions. This combination of hands-on execution and strategic insight often makes their impact more sustainable than initially expected.” 

Maximising impact requires the right conditions 

Effectiveness increases significantly when organisations provide structured onboarding and a clear briefing (45%), set realistic expectations and well-defined objectives (43%), and grant full access to relevant information (42%). Decision-making authority and transparent stakeholder communication are equally critical. 

“An interim manager can move quickly, but needs a clear mandate,” Asia Skifati concludes. “When expectations, responsibilities, and objectives are sharply defined, impact not only comes faster; it is also embedded more structurally within the organisation.” 

Discover more interim management trends and daily rates with our European Interim Management tool.