Project management

How to manage subcontractors on the job site

Manage subcontractors on site by confirming insurance and paperwork before they mobilize, giving them a clear site orientation and rules, planning their work in a shared look-ahead, tracking their manpower and progress every day, and putting every problem and direction in writing.

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.

Managing subcontractors on the job site comes down to clear expectations before they show up and consistent follow-through once they do. Before mobilization, confirm the subcontract is signed, the certificate of insurance is current, and the sub knows the schedule and site rules. On site, run a short orientation, plan their work in the weekly look-ahead with them, track headcount and progress in the daily log, and hold them to safety rules. When something goes wrong, deal with it in person first and in writing the same day. Most sub problems on site start as unclear scope, a missing area, or a schedule nobody shared.

The GC's responsibility for subs on site

A general contractor cannot hand off safety by subcontracting the work. Under OSHA's construction rules at 29 CFR 1926.16, the prime contractor and subcontractors can agree among themselves on who provides things like first aid or toilet facilities, but the prime contractor is never relieved of overall responsibility for compliance. A subcontractor is responsible for compliance on its own portion of the work, and for subcontracted work the prime contractor and subcontractors are treated as jointly responsible. Practically, that means the superintendent needs to see what subs are doing, not just whether they are on schedule.

How to manage subcontractors on site in 8 steps

  1. Check paperwork before mobilization. Signed subcontract, current COI with the required endorsements, any required licenses, and safety documents. No paperwork, no site access. Track it with a subcontractor COI tracking template.
  2. Hold a pre-start meeting. Walk the scope, the schedule, the areas they will work in, the submittals they owe, and the people they report to. Confirm the foreman's name and phone number.
  3. Run a site orientation for every new worker. Site hazards, PPE, emergency procedures, parking, laydown, deliveries, and housekeeping. Record attendance.
  4. Plan work together in the look-ahead. At the weekly sub meeting, each foreman commits to manpower and areas for the next three weeks. The super confirms the area will be ready.
  5. Track manpower and progress daily. Record each sub's headcount and work performed in the daily log. Compare against what they committed.
  6. Enforce safety and housekeeping consistently. Same rules for every company. Stop unsafe work on the spot and record it.
  7. Handle problems early and in writing. Talk to the foreman first, then confirm in a short email or notice. If it continues, escalate to the sub's PM or owner and follow the notice terms in the subcontract.
  8. Pay on time for approved work. Subs who are paid predictably show up. Collect lien waivers with each payment.

Pre-mobilization checklist

What to confirm before a sub starts work
ItemWhy it matters
Signed subcontract and scopeDefines what they owe and how changes work
Certificate of insurance and endorsementsCoverage in force before anyone is on site
License where requiredSome trades and states require it to perform the work
Safety program or site-specific planShows how they will manage their own hazards
Submittals approved for first workPrevents installing unapproved material
Foreman contact and crew sizeWho the super calls and what to expect
Schedule dates and area readinessAvoids mobilizing to an area that is not ready

Worked example: a drywall sub falling behind

Here is an example. On a 40,000 square foot office build-out, the drywall sub committed to 10 hangers for weeks 6 through 9 to finish board on floors 2 and 3. The daily logs show 6, 7, 5, and 6 hangers in week 6. By Friday, floor 2 is about a third short of the look-ahead, and tapers are scheduled to start Monday.

The superintendent talks to the drywall foreman Friday morning. The foreman says two crews were pulled to another job. The super asks for a recovery plan and gets a promise of 10 hangers Monday. He then sends a short email to the sub's PM: daily headcounts from the log, the commitment from the look-ahead, the impact on taping and the ceiling grid, and a request for a written recovery plan by Monday noon. He copies the GC's PM.

Monday, 9 hangers show up. The written plan adds a Saturday shift. Floor 2 board finishes Wednesday, and the tapers start floor 2 Thursday instead of Monday, so the super shifts them to floor 1 touch-up and closet areas for two days. If the sub had not recovered, the email and log entries would be the start of the notice trail the subcontract requires before the GC can supplement the crew and back-charge the cost. See how to terminate a subcontractor properly for where that path leads.

Keeping the relationship working

Good subs have choices about which GC's jobs get their best crews. The GCs who get them tend to do a few simple things well: areas are ready when promised, questions get answered within a day, change orders get priced and signed before the work, and pay apps are processed on a known schedule. None of that is soft. It is what lets a sub plan its labor, and a sub that can plan staffs your job first. When a sub does good work, say so to their office, not just the foreman. When the job ends, note who performed and who did not so the next bid list reflects it. Read more in how to schedule subcontractors.

Mistakes to avoid

  • Letting subs start without paperwork. Once they are on site, the leverage to get an expired COI renewed drops.
  • Telling subs what to do and how to do it. Direct the schedule, area, and quality standard. Leave means and methods to the sub unless the contract says otherwise.
  • Verbal direction only. If the super tells a sub to do extra work, it should be a written change request or field order the same day.
  • Area not ready. Mobilizing a sub into an area with open inspections or missing material burns their money and your goodwill.
  • Inconsistent safety enforcement. Letting a favorite sub skip fall protection undermines the rule for everyone.
  • Back-charges as a surprise. If you plan to back-charge, notify in writing before you incur the cost, as most subcontracts require. See back-charge.

Templates, terms, and tools

Use the subcontractor scope of work template to define the work before they arrive, the three-week look-ahead template to plan it, and the toolbox talk sign-in sheet for safety meetings. Related terms: subcontractor, flow-down clause, cure notice, and sub-tier. Before hiring, read how to prequalify subcontractors.

Smart Business Automator tracks each sub's insurance, documents, change orders, and payments on every job and flags expiring certificates before they become a site access problem. See subcontractor compliance automation.

Frequently asked questions

Is the general contractor responsible for subcontractor safety?

Under OSHA's construction rules at 29 CFR 1926.16, the prime contractor keeps overall responsibility for compliance even when work is subcontracted, and the prime and its subcontractors are jointly responsible for the subcontracted work. Subs are responsible for their own portion. Contracts may assign specific duties, but they do not remove the prime's overall responsibility.

Can a GC tell a subcontractor how to do the work?

Usually the GC directs what, where, and when, and the sub controls means and methods unless the contract says otherwise. Directing methods too closely can shift responsibility for the result back to the GC.

What should a subcontractor orientation cover?

Site hazards, required PPE, emergency procedures and contacts, access and parking, laydown and delivery rules, housekeeping expectations, and who to report to. Keep a signed attendance record.

How do you handle a subcontractor who is behind schedule?

Talk to the foreman, then document the shortfall in writing with daily log headcounts and the look-ahead commitment, and ask for a recovery plan by a set date. If it continues, follow the notice and cure steps in the subcontract before supplementing or terminating.

Should subcontractors attend the weekly meeting?

Yes, the foremen for active and upcoming trades should attend the weekly subcontractor coordination meeting. That is where look-ahead commitments are made and conflicts between trades get resolved.

Sources

  1. Cornell Law School LII: 29 CFR 1926.16 Rules of construction
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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