Subcontractor management is the core operational discipline of general contracting. It starts before the contract is signed — in prequalification and scope leveling — runs through project execution with coordination, payment, and performance monitoring, and ends at closeout with final lien waivers, warranty documentation, and punch list completion. Every phase has specific practices that separate GCs who consistently deliver on time from those who spend their margins on subcontractor recovery.
Construction time tracking software enters subcontractor management in two ways: the GC's own construction time keeping app tracks labor on self-perform work alongside subcontract cost for job costing, and forward-thinking GCs require subs to use a contractor time tracking app for T&M work documentation, certified payroll compliance, and daily workforce reporting.
Prequalification is the vetting process that happens before a sub is allowed to bid or receive work. The goal: identify financial, safety, legal, and capacity problems before they become your problems on an active project.
When to prequalify:
Prequalification information to collect:
A sub who can't make payroll in week 6 stops working in week 6. Financial distress is the most common cause of mid-project subcontractor failure.
Request:
Red flags:
A high-EMR sub is a high-risk sub. Their workers are injured at a higher rate — which means higher workers comp costs, higher incident probability on your project, and potential OSHA citations that reflect on the GC's site safety program.
Request:
Thresholds common in prequalification:
License verification: Contractor license numbers are verifiable in state databases. Verify the license is current, the classification matches the scope being bid, and any required specialty licenses (electrician, plumber, elevator) are in place.
Insurance requirements: Minimum requirements for most commercial subcontracts:
For higher-risk scopes:
Collect the Certificate of Insurance (COI) before mobilization. Verify the GC is named as Additional Insured on all policies — not just noted on the certificate. Get the endorsement, not just the declaration page.
A sub who is already 90% booked can't staff your project adequately. Capacity questions:
A sub who commits their B-team foreman because their A-team is on another job is a performance risk. Ask specifically who will run the field work on your project.
Three references from projects of similar size and scope completed in the last 3 years. Call them. Ask:
A sub who provides references but all of them are from 5+ years ago, or all from small projects when you're awarding a large one, is hiding something.
Before awarding, confirm that every bidder is pricing the same scope. Scope gaps between bids create post-award disputes — the sub claims they didn't include X, the GC assumed they did.
The scope of work defines exactly what the sub is responsible for. Every ambiguity in the scope becomes a change order negotiation during the project.
Scope of work must include:
Inclusions (what IS in scope): Specific, detailed — not "all mechanical work" but a line-item list referencing drawing sheets and specifications sections:
Exclusions (what is NOT in scope): Equally important — prevents scope creep claims:
Schedule requirements:
Compare bids apples-to-apples — same scope, same exclusions, same allowances.
Bid leveling sheet:
Scope Item | Sub A | Sub B | Sub C | Included? ----------------------|------------|------------|------------|---------- Base scope | $285,000 | $267,500 | $310,000 | All Equipment startup | Included | $8,500 add | Included | Required As-built drawings | Included | Included | $2,500 add | Required Chemical treatment | Excluded | Excluded | Excluded | By owner Permits | Included | $3,200 add | Included | Required Sales tax | Included | Included | Excluded | Required ADJUSTED BID TOTAL: | $285,000 | $279,200 | $312,500 | Sub B is the apparent low bidder after leveling — not Sub A as the raw numbers suggested. Awarding without leveling would have left $6,200 in post-award change orders.
Scope gap conversations: Before awarding, call the low bidder and walk through every scope item line by line. "Do you include startup?" "Do you include balancing?" Verbal confirmation documented in an email immediately after the call — "As discussed today, your bid includes..." This email becomes the scope clarification reference if a dispute arises.
The subcontract agreement defines the legal relationship. Most disputes between GCs and subs are determined by the subcontract — what it says, what it's silent on, and how the dispute resolution clause works.
Critical subcontract clauses:
By reference to the bid scope document, the drawings and specifications sections that apply, and any scope clarification correspondence.
Pay-when-paid vs. pay-if-paid: "Pay when paid" makes payment timing contingent on the GC receiving owner payment — not payment itself. "Pay if paid" shifts the risk of owner non-payment to the sub. Some states limit or prohibit pay-if-paid clauses for subs. Know your state's law and draft accordingly.
Percentage held, conditions for reduction, and release. Sub retainage typically mirrors GC retainage from the owner — if the owner holds 10%, the GC holds 10% from the sub. See Construction Retainage for retainage management detail.
Mobilization date, milestone dates, requirement to participate in GC's scheduling process, consequences for schedule failure.
How changes are authorized — written change order required before proceeding, emergency verbal authorization procedure, T&M documentation requirements for change order work. A sub who proceeds without written authorization has a weaker claim for payment.
Specific limits, endorsements required (Additional Insured, Waiver of Subrogation), notification requirements for policy changes or cancellations.
Sub responsibility for their own workers' safety, compliance with GC safety plan, right of GC to stop work for safety violations, right of GC to remove workers who create unsafe conditions.
Standard construction indemnification: sub indemnifies GC for claims arising from sub's work, subject to applicable state limitations.
Mediation first, then arbitration or litigation — matching the GC's dispute resolution clause with the owner. The sub's dispute resolution must be compatible with the prime contract — you can't bring an owner dispute to arbitration if the sub contract requires litigation.
All prime contract requirements applicable to the sub's scope flow down automatically. The sub is bound by everything the GC is bound by, to the extent it relates to the sub's scope. This is particularly important on Davis-Bacon prevailing wage projects — the sub's workers must be paid prevailing wages and certified payroll must be submitted.
Pre-construction meeting with each major sub before mobilization:
Document the pre-construction meeting in writing — distribute meeting minutes within 48 hours. Anything agreed in the meeting that isn't in the subcontract gets documented here.
Contractor time tracking software discussion: For subs performing T&M work or working on prevailing wage projects, the pre-construction meeting is the right time to establish time tracking requirements. A sub who uses construction employee time tracking that produces GPS-verified daily reports makes T&M billing documentation and certified payroll compliance simpler — and gives the GC visibility into the sub's workforce on site.
Track sub progress against the project schedule weekly. Three questions:
Early warning signals:
When schedule slippage is the sub's fault: document immediately in writing. "As discussed on [date], [Sub Company] is currently [X days] behind the approved schedule for [scope]. Please provide a recovery plan by [date]." A documented schedule warning is essential if the relationship later escalates to termination or delay claims.
Inspect sub work before it's covered. A drywall inspection after paint is applied is an argument about what's behind it. A pre-drywall MEP inspection while the rough-in is visible costs 30 minutes and prevents weeks of rework.
Document quality issues in writing: Email the sub foreman and their company's superintendent immediately when a quality defect is identified. Include photographs. State the required corrective action and deadline. A documented quality record is essential if retainage release or final payment becomes disputed.
The GC's safety obligation extends to sub workers on the project. Sub safety failures create OSHA liability for the GC.
Sub safety violations: documented immediately, corrective action required before the work resumes. Repeat violations: escalate to the sub's company management. Workers who create unsafe conditions: GC has the right under most subcontracts to remove them from the project.
Sub invoice review:
Lien waiver collection: Make lien waiver collection part of the payment process — sub doesn't get paid for period N until the conditional waiver for period N and the unconditional waiver for period N-1 are received. Build this into the payment processing workflow, not as an afterthought when the billing application to the owner is due.
See Construction WIP Report for how subcontract percent complete feeds the GC's WIP position and billing accuracy.
A sub who is behind schedule, producing defective work, or failing safety requirements requires a structured response — not silence, not threats, not informal conversations that don't create a record.
Step 1: Written notice of default Document the specific failure (schedule, quality, safety), the specific subcontract provision violated, and the required corrective action with a specific deadline. Send by email and certified mail.
Step 2: Recovery plan submission Require the sub to submit a written recovery plan — how they will correct the deficiency, what resources they will add, what the revised schedule looks like. A recovery plan that isn't executable ("we'll try harder") is not a recovery plan.
Step 3: Recovery plan monitoring Weekly check against the recovery plan commitments. If the sub isn't meeting their own commitments, document each failure.
Step 4: Termination If the sub fails to cure the default within the notice period and the recovery plan isn't working, the subcontract termination clause applies. See How to Fire a Subcontractor for the complete termination process, financial exposure management, and replacement sub mobilization.
The documentation trail from Steps 1–3 is essential for Step 4. A GC who terminates a sub without documented prior warnings faces a breach of contract claim. A GC who has three written notices of default, a recovery plan, and documented recovery plan failures has a defensible record.
Before releasing final payment and retainage, confirm every closeout requirement is satisfied:
Final payment and retainage release is the GC's last leverage point. Don't release it until the list is complete. See Construction Project Closeout for the full GC closeout process.
Skipping prequalification on repeat subs A sub who performed well 3 years ago may have changed management, lost key personnel, taken on too much work, or deteriorated financially. Annual re-prequalification catches these changes before they arrive on your project.
Awarding to the lowest bid without scope leveling The apparent low bid is often not the true low bid. Scope gaps discovered after award become change orders — at the sub's markup, on their schedule, with no competitive pressure.
Ambiguous scope of work Scope defined by reference to "all work shown on the drawings" without specific inclusions and exclusions produces disputes on every ambiguous detail. Specific scope documents eliminate most post-award disputes before they start.
Not collecting updated COIs Insurance policies expire annually. A sub whose policy lapses mid-project is uninsured while on your site — and the GC's insurance becomes the backstop. Calendar COI expiration dates and require renewal certificates before expiration.
Paying without lien waivers Every dollar paid to a sub without a conditional lien waiver is a dollar that creates lien exposure without the corresponding protection. Lien waiver collection is non-negotiable — never pay without it.
Verbal-only performance conversations A sub who is warned verbally and then terminated can claim they didn't know there was a problem. Every performance conversation gets documented in writing within 24 hours.
Pre-award:
Pre-construction:
During construction:
Closeout:
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