German tax, law and audit runs on Mandantgeheimnis and the DATEV stack.

Frequently asked

• How do you actually handle Mandantgeheimnis when AI tools touch client data?

  AI vendors handling Mandantendaten must be inside the Kreis der Gehilfen under §203 StGB — explicit contractual obligation to professional secrecy, technical isolation, no training on client data, German or EU-region hosting, separate Auftragsverarbeitungsvertrag under Art. 28 GDPR. Standard US-endpoint OpenAI or Anthropic deployments are not lawful without supplementary measures. The Areza engagement pattern: the Knowledge Bot is trained on the firm's published methodology, regulatory bulletins and de-identified FAQ, never on live mandate files. Matter-level AI work (contract review, due diligence, Buchführung automation, audit workpapers) is routed through tools the firm has already procured under framework — Harvey, Spellbook, Beck-Noxtua, DATEV-KI, MindBridge — with the firm's own AVV in force. Areza is the operational glue, not the model that touches privileged material.

• How does the BRAK Hinweise zur KI-Nutzung (Dec 2024) actually affect tool selection?

  The BRAK KI-Leitfaden is explicit on five points: verification duty (no AI defence for malpractice), personal responsibility of the Berufsträger, confidentiality and data protection compatibility, transparency obligations from 2 August 2026 under the EU AI Act, and mandatory staff training on AI competence and liability. In practice that means every Areza engagement for a Kanzlei ships with a documented Aufsichts- und Sorgfaltspflicht layer — who reviews AI output, who signs off, how the supervisory chain is recorded, and how staff competence is documented for the Kammer. The DStV Whitepapers (Feb 2025 KI-Assistenten + 2025 KI-Agenten) and IDW guidance for Wirtschaftsprüfer extend the same posture into tax practice and audit. We treat the Leitfaden as a procurement filter, not a marketing line.

• Does Areza integrate with DATEV-Schnittstelle, Septeo, RA-MICRO and the rest of the existing stack?

  Yes — Areza is the operational glue around the existing vendor stack, not a replacement. For Steuerberater the pattern is DATEV-Schnittstelle handoff for Buchführung automation; the Kanzlei keeps DATEV at the centre, and Areza ships intake, AI search, knowledge bot, practice-area content and lifecycle. For lawyers the pattern is Septeo Legal Twin or RA-MICRO with PRIME LEGAL AI as the matter-management spine, and Areza adds the surrounding marketing-site, AI-search, intake and FAQ-deflection layer. For Wirtschaftsprüfer it is MindBridge, CaseWare AnalytiQ or the Big-Four-proprietary stack on the audit-engagement side, and Areza on the firm's market-facing surface. We do not act as a reseller and we do not substitute for the matter-management vendor.

• If AI cuts 25-40% off bookkeeping or document-review time, how does that change my Vergütungsvereinbarung?

  Two viable paths under StBVV and RVG. Path one: route the saved time into capacity expansion and keep the existing fee structure — the Berufsträger sees the same revenue per mandate and serves more mandates per quarter, with Fachangestellte re-routed to higher-judgement work instead of being cut. Path two: move the routine work (laufende Buchhaltung, Steuererklärung-Routine, Standard-Vertragsentwurf, Pflichtprüfung-Workpaper) into Pauschalhonorare or Vergütungsvereinbarung priced against the post-AI cost base, and keep the hourly billing for the partner-judgement layer (Beratung, Verhandlung, Streitige Verfahren, gutachterliche Stellungnahmen). The new variable is how transparently you quantify the time-saved-per-mandate for the client conversation. Areza's Foundation layer publishes the Spezialgebiete and Berufsträger qualifications; the pricing conversation stays inside the Kanzlei.

• Is Areza a fit for a Big-Four office or only for the 1-50-person SMB Kanzlei?

  Honest answer: the 1-50-person SMB Kanzlei is the better fit. Big-Four offices already run proprietary stacks (PwC GL.ai, EY Helix, KPMG Ignite/Clara, Deloitte Omnia/Zora AI), large in-house digital teams and global procurement processes that do not need an external agency for AI search and intake. Hengeler Mueller, Freshfields, Gleiss Lutz, Linklaters Munich, A&O Shearman Frankfurt and the Big Four sit at the top of the tooling chain — they validate the platforms; the SMB tail buys downstream. Areza maps cleanly to Kanzleien that have outgrown a generic Typeform and a WordPress practice-area page but cannot justify a full in-house digital team. The exception is a Big-Four specialist line — a regional R&D-Steuer practice, a niche M&A advisory, a Forensik-Einheit — that operates as a quasi-independent unit and looks like SMB practice from a procurement perspective.

• Does the Voice Agent really hold the Sie register on AI-generated copy?

  Yes — Sie is the default across every client-facing surface, with Du appearing only inside team communication where the senior signal is explicit. The Voice Agent is configured with a German prompt scaffold that pins Sie, pins formal salutations (Sehr geehrte Damen und Herren, Sehr geehrter Herr Doktor [Nachname]), pins the Vergütungsvereinbarung vocabulary, and pins the Mandantgeheimnis disclaimer at the start of any consent capture. The same scaffold runs across Knowledge Bot outputs, AI-generated practice-area copy and AI Search citation surfaces. Du copy fails a Mittelstand Berufsträger procurement review on the first read; we treat it as a hard register lock, not a stylistic preference.

• What's a realistic engagement budget for a 1-30-person Steuerberater-, Rechtsanwalts- or WP-Kanzlei?

  Foundation starts at EUR 4,800 for a 2-4 week conversion-first build (practice-area pages, Berufsträger profiles, Kammer-registration numbers, StB / RA / WP / FAStR credentials marked up in schema, German-default with EN where cross-border practice justifies it). AI Search retainer starts at EUR 390/month (EUR 1,500 setup). A typical SMB Kanzlei engagement combines Foundation + AI Search + Knowledge Bot, landing around EUR 5,000-7,000 setup + EUR 700-900/month for the first six months. Voice Agent bolt-on adds EUR 1,200-1,800/month depending on call volume and Sie-register calibration depth. Workflow Ops with DATEV-Schnittstelle or beA integration adds roughly EUR 1,500/month. Pricing is published; German buyers expect it.

• What does the EU AI Act Art. 4 KI-Kompetenzpflicht mean for my Kanzlei in practice?

  Art. 4 has applied since 2 February 2025 and requires every Kanzlei deploying AI to ensure adequate AI literacy among staff using the systems. Concretely: a documented training programme for Berufsträger and Fachangestellte covering capabilities, limits and the Aufsichts- und Sorgfaltspflicht of the supervisor, plus written records that satisfy a Kammer review. The Annex III high-risk deadline on 2 August 2026 adds full compliance for systems used in creditworthiness scoring (relevant to corporate-finance practice), employment and HR decisioning (relevant to employment-law clients and consulting hiring tools), and administration of justice — system logs, fundamental-rights and data-protection impact assessments, transparency to affected individuals, documented human oversight. Penalties run up to EUR 15M or 3% of global turnover. Areza's Growth Stack engagement includes an EU AI Act readiness series that doubles as a citation surface for 'EU AI Act Steuerberater', 'KI-Kompetenz Anwalt' and similar buyer queries.