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The professional services sector includes several subcategories such as law firms, accounting firms, engineering offices, architecture firms, and HR consultants. Together, these five sub-industries generate over $82B in annual revenue—including $42.4B from engineering, $21.5B from legal services, and $18.3B from accounting.
Demand is driven by the resurgence of infrastructure projects, a surge in new business creation, and the increasing complexity of regulatory frameworks.
Despite their differences, these professions share three common drivers:
Three indicators illustrate the sector’s size, profitability, and growth dynamics.
Total 2025 sales from engineering, accounting, and legal firms.
Weighted average: 23.8% in legal, 32.1% in accounting, 6.3% in engineering
Consolidated annual growth rate: 2.2% in engineering, 2.0% in law, 1.7% in accounting
Technology is reshaping the landscape: generative AI is automating bookkeeping, contract analysis, and plan design, freeing up time for higher-value consulting work.
At the same time, the shortage of skilled labor is increasing wage pressure; engineering, for example, anticipates a skills gap that could delay projects and squeeze margins.
In response, firms are focusing on:
By 2030, growth is expected to remain strong, supported by public infrastructure investment, SME digitalization, and regulatory complexity.
Firms that can combine sector-specific expertise with technological solutions will capture the majority of the added value.
Three indicators illustrate the sector’s size, profitability, and growth dynamics.
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