Interim HR Services
Interim HR executives placed on short-term project engagements.
Market snapshot
These figures describe HR Consulting & Advisory (1.4.6), the segment that Interim HR Services sits within — not Interim HR Services on its own.
- Market size
- ~$24.6B
- Growth
- ~6.2%CAGR (2017–22, nominal)
- Companies
- ~7,641 firms
90.9% of firms have fewer than 20 employees — 6,944 micro-businesses, below most mandates.
- 20–99
- 43162%
- 100–499
- 14421%
- 500+
- 12218%
Percentages are of the 20+ employee universe. 20–99 and 100–499 are the lower-middle market; 500+ is at scale.
This is the catch-all professional-HR code: 541612 sweeps in most compensation, DEI, and org-design consulting too, so the $24.6B is the whole HR-advisory field rather than pure strategy work — the neighbouring segments in this sector are subsets of it, not additions to it. Firms average 20 employees, twice the sector norm, because the human-capital majors (Mercer, WTW, Aon) sit inside this code alongside the boutique base.
NAICS 541612. U.S. Census Bureau — 2022 Statistics of U.S. Businesses; U.S. Census Bureau — 2022 Economic Census.
Business model & economics
Revenue model
Advisory retainers plus project engagements
Key economics
- Revenue per firm
- $3,219,858
- Revenue per employee
- $178,569
- Employees per firm
- 20.0
- Recurring revenue
- Moderate
- EBITDA margin
- 15–30%
- Capex intensity
- Low
relationships recur; specific projects are episodic
Characteristics
- Balanced cost base — payroll is 45% of revenue, leaving room to scale margin without cutting staff
- Moderate strategic-buyer pool — 122 firms exceed 500 employees; a scaled asset has buyers, but not many
- Rising regulatory and talent-management complexity sustains demand.
- People- and expertise-driven economics with minimal capital needs.
- The category spans compensation, DEI, and org-design specialisms.
NAICS 541612. U.S. Census Bureau — 2022 Statistics of U.S. Businesses; U.S. Census Bureau — 2022 Economic Census.
M&A deal context
Who’s acquiring
- Human-capital consulting platforms
- Benefits & HR-services consolidators
- PE-backed advisory roll-ups
What’s driving deals
- Consolidation of boutique HR advisors onto larger platforms.
- Cross-sell of HR advisory with benefits and administration.
- Demand from compliance and organizational-transformation work.
Find Interim HR Services acquisition targets
Search Acquisera’s index for companies classified under Interim HR Services (1.4.6.3) and build a targeted deal pipeline.
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