What is a subcontractor?

A subcontractor is an independent professional or firm engaged by a consulting company to deliver services on client projects, typically when specialized skills are needed or internal capacity is insufficient. The prime consulting firm maintains the client relationship and accountability while the subcontractor performs specific work. Subcontractor arrangements require careful management of margins, quality, and compliance with IRS contractor classification rules.

Key characteristics

• Works under contract to the consulting firm, not directly for the client

• Paid on a 1099 basis without employee benefits or tax withholding

• Provides specialized skills or surge capacity

• Consulting firm marks up subcontractor rates (typically 15-35%)

• Subject to IRS classification rules (behavioral, financial, relationship tests)

• May require client approval depending on contract terms

Why it matters for service firms

Subcontractors enable consulting firms to scale without fixed headcount costs and access specialized expertise on demand. A firm billing a subcontractor $200/hour while paying $150/hour earns a 25% margin without a salary commitment. However, over-reliance on subcontractors can erode margins and firm IP. Best practice: use subcontractors for specialized skills and surge capacity (15-25% of delivery) while maintaining the core team for relationship continuity and methodology ownership.

Real-world example

Insight Advisory wins a $450,000 data analytics project requiring specialized machine learning expertise not on staff. Options: hire full-time ML specialist ($180,000/year + benefits) or engage subcontractor for project duration. The firm employs an ML subcontractor at $175/hour for an estimated 600 hours ($105,000 cost), billing the client at $225/hour ($135,000 revenue). Margin on subcontracted portion: $30,000 (22%). This compares favorably to hiring: the full-time hire would cost $90,000 for 6 months, even if fully utilized, with an ongoing obligation. The subcontractor provides flexibility without long-term commitment.