HSP GRUPPE and its affiliated firm network are using ChatGPT Enterprise to process information faster, raise work quality, and create additional capacity for advisory work and client service.
Scope and timeframe of use
Usage figures cited by the organization refer to a shared ChatGPT Enterprise workspace used by HSP GRUPPE and Kanzleipakt, covering 81 organizational groups. Reported conversation data covers the period from February 1 to July 14, 2026.
A strategic approach: organizational transformation, not just a tool
For more than twenty years HSP GRUPPE has invested in digitizing and standardizing firm processes, embedding quality management, and fostering a culture of continuous improvement. When generative AI appeared, the network treated it not merely as a productivity tool but as an opportunity to rethink how professional work is organized.
Leadership reframed the question from "how can AI help employees write emails or summarize documents faster" to "what happens when AI becomes part of the operating model of a professional services firm." As a result, ChatGPT Enterprise was introduced as an organizational transformation with emphasis on adoption, governance, and continuous learning rather than a simple software rollout.
Governance, adoption and practical knowledge sharing
The organization runs monthly AI forums where employees present practical use cases and learn from one another. ChatGPT Enterprise’s security features provide a technical foundation, while the use of client-related information is governed by HSP’s internal data protection, confidentiality and governance rules. Professional review and final responsibility remain with the relevant tax, legal or accounting professional.
The goal was not limited experimentation; it was to build a capability that can scale across the network.
Practical applications and shared Agents
Professionals quickly discovered new daily uses for AI, and the organization standardized successful approaches into shared, custom Agents. Examples include:
- AI Client Communication: a shared Agent that supports first drafts, structure, clarity and a consistent, client-oriented tone, while leaving final professional decisions to the specialist.
- Booking Assistant SKR03 & SKR04: an assistant that supports preparation and classification of specific booking questions; final booking decisions remain with the employee.
These shared Agents reduce repetitive work and make best practices available to all employees, not just AI experts.
Staff experiences: less prep work, more expert application
- Managing Partner Frank Heibel uses ChatGPT as a technical sparring partner to work through complex tax questions and refine client communications, saying the tool has changed the level at which work can be done.
- Partner Magdalene Posnak shortened the time required to evaluate multiple real estate investments, freeing more time for direct client advising.
- Managing Director Marco Sell uses AI-driven dashboards to explore financial scenarios with clients during meetings.
- Lawyer and tax advisor Jan-Henrik Leifelt uses ChatGPT to strengthen—rather than replace—his professional judgment.
The recurring outcome: less time spent preparing information, more time applying expertise.
Next phase: ChatGPT Work and agentic automation
HSP is already piloting ChatGPT Work. Weeks after gaining access, the organization began pilots with a small group of developers and administrators before expanding the trial across the wider workspace. The aim is to determine how agentic AI can safely automate complex workflows while balancing governance, quality and cost prior to broader rollout.
As an example, HSP points to year-end accounting: today, accountants often only discover missing information when preparing annual accounts months after bookkeeping is complete. HSP is exploring whether ChatGPT Work can continuously review bookkeeping throughout the year, identify missing information and proactively request documents from clients so that much of the preparation is already done before an accountant opens the file.
This shift—from AI assisting individuals to AI orchestrating work across whole processes—represents the next stage of HSP’s transformation.
Economic impact: capacity increase, not headcount reduction
For HSP, the economic benefit is not about reducing headcount. The network’s firms are already operating at capacity and managing substantial backlogs. Time saved with ChatGPT is therefore redirected toward additional client work, shorter turnaround times, more advisory capacity and stronger client service.
Network collaboration and long-term vision
Together with Kanzleipakt, HSP GRUPPE plans to establish a joint DATEV-centric AI, process and development team to evaluate successful decentralized experiments and translate them into documented, scalable reference workflows. As ChatGPT Work and agentic capabilities mature, the network intends to move beyond assisting individual professionals toward automating entire workflows that proactively support employees and clients alike.
For Carsten Schulz the long-term opportunity extends beyond HSP: he believes AI can strengthen the role of trusted professionals by enabling them to spend more time exercising judgment, solving complex problems and building client relationships.
