Compliance and payroll

How to prequalify subcontractors

Prequalifying a subcontractor means checking, before bid day, that the firm has the money, people, safety record, insurance, licenses, and references to finish the scope you are about to hand it. A short questionnaire, a scored review, and an approved dollar limit per sub do most of the work.

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Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

To prequalify subcontractors, send each firm a standard questionnaire, collect supporting documents (financials, safety records, insurance, licenses, references), score the answers against fixed criteria, and assign an approved single-job and total-backlog limit. Do it before bids come in, not after the low number arrives, so price never pressures the decision. Update it every year or when something big changes.

Subcontractor prequalification is the cheapest risk control a GC has. A sub that defaults halfway through framing costs far more than the time it takes to review three years of financials and a safety log.

What to evaluate: a framework borrowed from federal contracting

The Federal Acquisition Regulation gives a useful checklist. Under FAR 9.104-1, a responsible contractor must have adequate financial resources, be able to meet the schedule given its other commitments, have a satisfactory performance record, have a satisfactory record of integrity and business ethics, have the necessary organization, experience, controls, and technical skills (including safety programs), have the needed equipment and facilities, and be otherwise qualified to receive an award. FAR 9.104-4 puts the job of judging subcontractor responsibility on the prime. Private GCs are not bound by the FAR, but the categories fit any job.

Prequalification categories and what to collect
CategoryWhat to collectWhat it tells you
FinancialTwo or three years of financial statements, bank reference, bonding letterWorking capital to carry payroll until you pay
CapacityCurrent backlog, largest job completed, crew size, key staffWhether your job fits alongside their other work
SafetyWritten safety program, OSHA 300A summaries, experience modification rate, citation historyHow the field actually behaves
InsuranceCertificate and endorsements meeting your requirementsWhether a loss lands on their policy or yours
Licensing and eligibilityState and local licenses, registrations, federal exclusion status for public workWhether they can legally do the work
PerformanceThree to five GC references on similar scopes, litigation and lien historyWhether they finish, fix punch work, and pay their suppliers

How to prequalify subcontractors in 6 steps

1. Build one questionnaire and keep it short

A 12-page form gets ignored by the best subs, who have plenty of work. Ask for what you will actually score. Accept a recent questionnaire the sub filled out for another GC if it covers the same ground.

2. Check safety records the right way

Ask for the OSHA Form 300A annual summary for the last three years. Every employer that must keep injury records has to complete it, have a company executive certify it, and post it from February 1 to April 30 each year, so it already exists. Be aware that a company with 10 or fewer employees at all times during the prior year is partially exempt from routine recordkeeping under 29 CFR 1904.1, so a small sub may honestly have no log. For those, ask for incident reports, the safety program, and training records instead. The EMR guide explains how to read the experience mod.

3. Read the financials for working capital, not just revenue

Revenue says how big a sub is. Current assets minus current liabilities says whether it can float your job. A mechanical sub with $8 million in revenue and thin working capital can struggle with a $1.5 million job that pays 45 days after month end with 10 percent retainage.

4. Call references and suppliers

Ask other GCs three questions: would you hire them again, did they man the job when promised, and did their suppliers ever send you a lien notice? A call to the sub's main supplier about payment habits is often more revealing than the reference list.

5. Check public work eligibility

On federal prime contracts, FAR clause 52.209-6 bars subcontracting above the threshold in FAR 9.405-2(b) with firms that are debarred, suspended, or proposed for debarment, unless there is a compelling reason and the contracting officer is notified. It also requires proposed subs above that threshold to disclose in writing whether they or their principals are excluded. Check exclusions in SAM.gov and keep a record. See how to subcontract on federal construction projects.

6. Score, approve a limit, and record it

Assign a score per category and an overall result: approved, approved with conditions (for example, bond required or joint checks), or not approved. Set a single-job limit and an aggregate limit across all your open work with that sub. Save the file where estimators can see it during bid leveling.

Worked example: scoring a drywall sub

Say a GC uses a 100-point scale: financial 30, safety 25, capacity 15, performance 20, insurance and licensing 10 (pass or fail plus points). A drywall sub applies to bid a $650,000 interior package.

Example scorecard (illustrative weights and results)
CategoryMaxScoreNotes
Financial3021Profitable, working capital about 9 percent of revenue
Safety2522Written program, three years of 300A summaries, no recent citations
Capacity159Largest prior job $420,000; backlog heavy through spring
Performance2018Three GC references would rehire
Insurance and licensing1010Meets requirements
Total10080Approved with conditions

The GC approves the sub up to $500,000 per job without a bond, and above that with a performance and payment bond. For this $650,000 package, the sub can bid if it includes bond cost. The weights are a choice. What matters is that every sub is scored the same way.

What to do when a sub does not qualify

A failed score does not have to end the relationship. Tell the sub which category fell short and what would change the answer: a bonding line, a newer financial statement, a second superintendent, or a cleaner safety record next year. Some GCs use conditional approval for promising smaller firms, starting them on a $40,000 or $60,000 scope with joint checks to their main supplier and stepping the limit up after each job closes out cleanly.

Keep the decision and the reason in the sub's file. When a project manager asks why a cheaper bidder was passed over, the record answers it, and it keeps the process consistent from one estimator to the next.

Mistakes to avoid

  • Prequalifying after bids are opened, when the low number makes everyone want to say yes.
  • Scoring only safety because it is easy to measure.
  • Treating prequalification as permanent. Refresh annually and after any default, claim, or ownership change.
  • Ignoring capacity. A great sub that is overcommitted can hurt the schedule as badly as a weak one.
  • Keeping the results in one estimator's inbox where nobody else can find them.

Templates, terms, and tools

Pair prequalification with how to level subcontractor bids and the bid leveling template. For insurance review, use what a subcontractor COI should include. Subs on the other side of this process can read how to get prequalified with general contractors. Smart Business Automator's subcontractor tracking keeps each firm's documents, expiration dates, and approval status in one record, part of subcontractor compliance automation.

Frequently asked questions

How often should subcontractors be prequalified?

Annually is common, with an update whenever a sub has a default, a large claim, an ownership change, or wants to bid a job well above its approved limit.

What documents should a subcontractor prequalification include?

Financial statements, a bonding letter if available, OSHA 300A summaries or other safety records, a safety program, insurance certificates, licenses, a list of current and completed jobs, and references.

What if a small subcontractor has no OSHA 300 log?

Companies with 10 or fewer employees during the prior calendar year are partially exempt from routine OSHA recordkeeping under 29 CFR 1904.1. Ask for their safety program, training records, and any incident history instead.

Should I require bonds from subcontractors?

Bonds are one way to approve a sub that scores well on everything except financial strength or capacity. Many GCs require them above a set dollar limit or for critical-path trades. Weigh the bond cost against the risk.

Sources

  1. Acquisition.gov: FAR 9.104-1 General standards
  2. Acquisition.gov: FAR 9.104-4 Subcontractor responsibility
  3. Acquisition.gov: FAR 52.209-6 Protecting the Government's interest when subcontracting with contractors debarred, suspended, or proposed for debarment
  4. Cornell LII: 29 CFR 1904.1 Partial exemption for employers with 10 or fewer employees
  5. Cornell LII: 29 CFR 1904.32 Annual summary
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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