← Back to Cognitive Services
COGNITIVE SERVICES
IT Services / Outsourcing
Leader: Accenture — 8.0% S1 · 17.7% CR3
S1
leader
CR3
top 3 combined
HHI
Unconcentrated
MARKET SIZE
US
How this is calculated
FORMULA
S1 = Accenture revenue / total revenue = 8.0%
CR3 = Accenture + Tata Consultancy Services + IBM Consulting = 17.7%
HHI = Σ(share²) = 115 (Unconcentrated (HHI < 1,500))
DENOMINATOR
Revenue — $450B (US)
US IT services + outsourcing revenue (application, infra, consulting).
Size from: IDC IT Services Tracker
TOP 3 PLAYERS
#1Accenture8.0%
#2Tata Consultancy Services5.6%
#3IBM Consulting4.1%
METHODOLOGY NOTE
Accenture FY24 $64.9B is unambiguous #1. TCS FY24 (year ending March 2024) $29.1B revenue is materially larger than IBM Consulting ($21.4B) and Infosys ($18.6B), making TCS the true #2 globally — previously listed as Infosys/IBM before TCS's recent ascent. Capgemini ($23B) and Cognizant ($19.7B) round out the top 6. CR3 reflects fragmented competitive landscape across application services + consulting. Denominator: global IT services & consulting ~$1.2T (Gartner 2024).
Year: 2025
Geo: US
Firms: Thousands globally (boutique + offshore + Big 4 advisory)
Historical S1 / CR3 trajectory
2000S1: 3%CR3: 8%Andersen Consulting era
2005S1: 5%CR3: 11%Post-Enron rebrand to Accenture
2010S1: 6.5%CR3: 13%Offshore scale
2015S1: 7.5%CR3: 14.5%Digital practice growth
2020S1: 8%CR3: 15.5%Cloud modernization wave
2025S1: 8.5%CR3: 16%GenAI services boom
Labor economics
REV / EMPLOYEE (leader)
$0.2M
industry avg $0.1M
SG&A % (leader)
16%
of revenue
Accenture FY2025 SG&A 16.4% on $69.7B; largest labor arbitrage business on earth
Related markets
Source Quality Hierarchy
Every market has a primary source plus 1–3 validation sources. Revenue numerators come from SEC 10-K filings; denominators validated against the Economic Census where available.
TIER 1Authoritative anchorsGovernment data + SEC filings
US Economic Census (data.census.gov) · SEC EDGAR / Company 10-Ks · BEA Industry Value-Added (FRED) · BLS QCEW · USGS Mineral Commodity Summaries · EIA Refinery Capacity Report · FDA device listings
TIER 2Leading commercial trackersIndustry-standard paid trackers
IDC Semiannual Software Tracker · Gartner Market Share & Magic Quadrant · IBISWorld NAICS reports · StatCounter Global Stats · eMarketer / Insider Intelligence · Synergy Research Group
TIER 3Category specialistsBest-in-class niche authorities
SIPRI (aerospace & defense) · IQVIA (pharma) · TrendForce (semiconductors) · CIMdata (CAD/PLM) · Nilson Report (payments) · Am Law 100 (legal) · ENR Top 500 (A&E) · AM Best (insurance) · SIA (staffing) · Ad Age (agencies) · Barron's / Cerulli (wealth) · Evaluate MedTech · Nielsen Gauge (streaming) · Gridwise (ride-hail) · Bloomberg Second Measure (delivery) · RC Top 100 (roofing) · SDM Top 100 (fire/safety) · Big 4 annual reports · ALM Intelligence (consulting)
Data vintage: Q2 2025 research compilation. Labels updated 2026-Q2. Tier 1 sources refreshed from FY2025 SEC filings where available. For full methodology see the Methodology page.