Accounting, tax, audit, and advisory firms are, at their core, document businesses. The daily work is reading files, drafting statements and memos, checking each other’s work, and explaining it to clients. That is precisely the work generative AI does best — which is why professional services is one of the highest-return places to apply it, and why the profession has already made up its mind.
The numbers behind the shift
| Metric | Figure | Source |
|---|---|---|
| Time saved per professional | ~4 hrs/week now, up to 12 in five years (~200 hrs/yr) | Thomson Reuters, 2024 |
| Document review & drafting | ~50% less time in audit & advisory | Industry research, 2025 |
| Expect high/transformational impact | 77% of professionals | Thomson Reuters, 2024 |
| ROI advantage with a visible strategy | 3.5× vs. firms with none | Thomson Reuters, 2025 |
| GenAI central to workflow (now/soon) | 69% of tax & accounting firms | TR Institute, 2026 |
In a billable-hour business, saved time is not a soft benefit — it is margin, capacity, or both. The Thomson Reuters estimate of ~200 hours a year per professional is roughly one extra colleague for every ten on staff.
Where it pays first
The highest-value starting points are the document-heavy tasks every firm already does: working paper and file review, financial statement roll-forward and drafting, tax and technical research with citations, and grounded answers over the firm’s own engagement files. These are bounded, reviewable, and repeated across every client — the ideal shape for an AI workflow.
Why most of the value hinges on execution
The gap between firms that capture value and those that do not is rarely the tool. It is strategy and adoption: a governed platform, a shared prompt library, a partner-review step, and a way to keep the firm’s knowledge through turnover. Firms with a visible AI strategy are 3.5× more likely to see ROI than those buying seats and hoping.
That is the shape of a Celadon engagement for professional services: an AI Audit to choose the platform safely, then AI Strategy and Enablement to make it stick. See how it maps to the profession on our Accounting & Professional Services page, and read AI without breaking client confidentiality before you send a single file.
Find where AI pays first in your firm
An AI Audit maps your document-heavy workflows to safe, high-value AI use — with a governed platform recommendation you can act on.
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