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What is subcontractor prequalification?

Subcontractor prequalification is the review a general contractor does before inviting a trade contractor to bid: checking finances, safety, insurance, experience, and capacity, and setting a limit on how much work that sub can take on.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

A low number from a subcontractor that cannot finish the work is not a low number. Subcontractor prequalification is how a GC screens trade partners before bid day so that every price on the bid leveling sheet comes from a company it would actually hire. The general idea of prequalification applies to owners screening GCs too. This page is about the GC-to-sub version, which is usually a questionnaire, a document checklist, and a score.

What a GC looks at

AreaTypical documents or questions
Financial strengthReviewed or audited statements, working capital, bank reference, backlog
BondingSurety letter showing single-job and aggregate capacity
SafetyExperience modification rate, OSHA 300A summaries, written safety program
InsuranceCertificate with limits, additional insured endorsements, deductibles and SIRs
ExperienceSimilar completed projects, references from other GCs
CapacityCurrent workload, crew size, key personnel
Licensing and legalState license, litigation and claims history, any debarment

Many GCs turn this into a score and a work limit. A sub might be approved for single subcontracts up to a set dollar amount and a total open backlog with that GC. Anything bigger needs a bond or a subcontractor default insurance review.

A worked example

A GC is about to bid a $14 million charter school. Its drywall scope will be roughly $1.6 million. Two of the five drywall subs on its list have never worked for it. Both fill out the prequal form.

Sub A has strong references, a clean safety record, and reviewed financials showing $900,000 of working capital. Sub B has a better price history but its financials are compiled, not reviewed, its largest past job was $450,000, and its experience modification rate is above the GC's threshold. The GC approves Sub A up to $2 million and Sub B up to $500,000. Sub B can still bid the school's smaller site buildings, but not the main drywall package. Nobody wastes a week pricing work they could not be awarded.

Common mistakes

  1. Prequalifying once and never updating. Finances and safety records change every year.
  2. Collecting forms but not reading them. A prequal file nobody reviews protects no one.
  3. Using a sub above its approved limit on bid day because its number is low.
  4. Asking small subs for documents they cannot reasonably produce, which shrinks the bidder pool. Scale the requirements to the job.
  5. Forgetting to share the result. Subs should know their limit and what would raise it.

Related terms

See trade partner, approved vendor list, bond capacity, how to prequalify subcontractors, and, from the sub's side, how to get prequalified with general contractors. Smart Business Automator tracks subcontractor documents, expirations, and compliance status per sub; see subcontractor compliance automation.

Frequently asked questions

Why do general contractors prequalify subcontractors?

To make sure every bid comes from a sub that can finance, staff, and safely complete the work, which lowers the risk of default, delays, and back charges.

How often should subcontractors be prequalified?

Most GCs refresh prequalification once a year and update insurance and licenses as they expire, plus a review before any unusually large award.

What documents do subcontractors need for prequalification?

Typically financial statements, a bonding letter, safety records such as EMR and OSHA logs, insurance certificates, licenses, a project list, and references.

Can a subcontractor be prequalified for some jobs but not others?

Yes. Many GCs set a dollar limit per subcontract and a total backlog limit, so a sub may be approved for smaller packages before larger ones.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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