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Understanding Limitations on Subcontracting: 13 CFR 125.6 Explained
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3 min readSeptember 3, 2026

Understanding Limitations on Subcontracting: 13 CFR 125.6 Explained

V
VETR Editorial TeamAuthor

The 30% Rule: Why 13 CFR 125.6 is Your First Teaming Constraint

Understanding the 30% subcontracting limit in 13 CFR 125.6 is essential for SDVOSBs, WOSBs, and 8(a) firms. This rule shapes your teaming structure before you even sign a teaming agreement.

Understanding the 30% Subcontracting Limit

For SDVOSBs, WOSBs, and 8(a) firms, you can subcontract up to 30% of the total contract value. This applies to services, supplies, and construction contracts, though calculation methods vary. For a quick assessment, use the free VETR readiness assessment.

Why the 30% Cap?

The 30% cap ensures the prime contractor retains a significant portion of the work, in line with set-aside program goals. This rule is enforced through FAR Clause 52.219-14.

The Similarly-Situated Entity Exception Explained

The similarly-situated entity exception allows you to exceed the 30% limit if subcontracting to another SDVOSB, WOSB, or 8(a) firm. This exception has its own rules and limitations.

Qualifying for the Exception

To qualify, the subcontracting entity must:

  • Be in the same socio-economic category (SDVOSB, WOSB, or 8(a)).
  • Perform a significant portion of the subcontracted work.

This exception is useful in large contracts where the 30% limit might otherwise constrain your teaming options.

Calculating the Limit for Services Contracts

For services contracts under NAICS code 54 (Professional, Scientific, and Technical Services), the calculation is straightforward.

Step-by-Step Calculation

  1. Determine the Total Contract Value: Assume a $1 million contract.
  2. Apply the 30% Rule: Multiply $1 million by 0.30.
  3. Result: You can subcontract up to $300,000.

For more on NAICS codes, check out our NAICS-code playbooks.

Calculating the Limit for Supplies Contracts

For supplies contracts under NAICS code 33 (Manufacturing), the process is similar but requires attention to detail.

Step-by-Step Calculation

  1. Determine the Total Contract Value: Assume a $2 million contract.
  2. Apply the 30% Rule: Multiply $2 million by 0.30.
  3. Result: You can subcontract up to $600,000.

Calculating the Limit for Construction Contracts

Construction contracts under NAICS code 23 (Construction) have unique considerations.

Step-by-Step Calculation

  1. Determine the Total Contract Value: Assume a $3 million contract.
  2. Apply the 30% Rule: Multiply $3 million by 0.30.
  3. Result: You can subcontract up to $900,000.

FAR Clause 52.219-14: Flow-Down Requirements

FAR Clause 52.219-14 ensures subcontracting limits are enforced throughout the subcontracting chain.

Key Points

  • Flow-Down: The 30% limit must be included in all subcontracts.
  • Enforcement: Non-compliance can lead to contract termination.

DOL NAICS Code Lookup: Finding Your Contract's NAICS

To accurately calculate your subcontracting limits, use the Department of Labor's NAICS code search tool.

Why NAICS Codes Matter

  • Accurate Calculations: Ensures you apply the correct subcontracting limits.
  • Contract Compliance: Helps you stay within the bounds of 13 CFR 125.6.

The $15 Million Threshold: When the Rule Changes

For contracts over $15 million, additional reporting and justification may be required.

What to Expect

  • Increased Scrutiny: Be prepared for more detailed reviews.
  • Documentation: Maintain thorough records to justify your subcontracting decisions.

Modeling Workshare: The Constraint You Build Around

Before signing any teaming agreement, model your proposed workshare against the 13 CFR 125.6 limit.

How to Model

  1. List Proposed Team Members: Include all potential subcontractors.
  2. Calculate Individual Limits: Apply the 30% rule to each.
  3. Summarize Total Subcontracting: Ensure it doesn't exceed your calculated limit.

VETR's Teaming Tool: Your Solution for Compliant Proposals

VETR's teaming management tool automates limit calculations and workshare modeling, ensuring your proposals are compliant from the start.

Why VETR?

  • Automated Calculations: Save time and reduce errors.
  • Real-Time Updates: Stay current with the latest regulations.
  • Expert Guidance: Access to agency-specific playbooks and expert advice.

Ready to elevate your proposal management? Start a free trial today and see how VETR can transform your federal contracting process.

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