Subcontractor Risk Management: How GCs Control the Risk Subs Bring
Every sub you put on a job brings their insurance, their license and their crew with them — and their gaps too. Subcontractor risk management is making sure those gaps are found before the sub mobilizes, not after the incident. This guide walks the risks one by one, then the four points where you control them: prequalification, the subcontract, monitoring during the job, and what you do when something lapses on site.
Subcontractor risk management is making sure every sub on a job is insured, licensed and contractually responsible for their own work. Prequalify before they mobilize — certificate, endorsements, workers' comp, license, signed subcontract. Flow the owner's requirements down. Monitor policies and licenses during the job, because a certificate from March says nothing about June. And when a sub lapses on site, act in writing and keep the dates.
In this guide
The risks subs bring onto a job
Subcontractor risk has two halves. Performance and financial risk — a sub who falls behind, defaults or does poor work — is handled with bonds, schedules and payment terms. The half this guide covers is the one that turns an accident into your claim:
Coverage that lapses mid-job
General liability and workers' comp renew once a year, and not always on time. A sub cleared at mobilization can be uninsured by the time they're on the third floor.
Limits below the owner's contract
The owner's insurance exhibit requires $2M per occurrence; the sub carries $1M. The certificate looks complete until someone reads the number against the requirement.
Missing endorsements
"Additional insured" typed into the description box, with no CG 20 10 or CG 20 37 behind it, gives you nothing when a claim arrives. The same goes for waiver of subrogation and primary and noncontributory wording.
A license suspended during the project
State boards suspend licenses for complaints, lapsed bonds or unpaid fees. Nothing about the sub's insurance changes when that happens, so a clean certificate and a suspended license can sit in the same file for months.
Workers' comp gaps and the uninsured sub-tier
A one-person crew with no workers' comp, or a sub who brings their own subs without collecting from them. In many states the GC can end up as the statutory employer of those workers — and the premium audit charges you for their payroll.
The premium audit point is easy to miss: see general liability premium audits for subcontractors for how an uninsured sub's payroll ends up on your bill.
Prequalification: what to check before a sub mobilizes
The cheapest moment to fix a gap is the day before the sub starts. Six items cover the compliance side of prequalification:
Certificate of insurance
An ACORD 25 issued by the sub's agent, showing general liability, auto and umbrella with limits that meet your subcontract — and the owner's, if it is stricter.
Endorsement pages
Additional insured (CG 20 10 for ongoing operations, CG 20 37 for completed), waiver of subrogation, and primary and noncontributory. The pages themselves, not a line in the description box.
Workers' comp or a valid exemption
A workers' comp certificate, or the state's exemption certificate where the sub qualifies for one. "We don't have employees" is not a document.
License check with the state board
For licensed trades, search the state board for the license number, the business name and its status. Active today means active today — record the date you checked.
W-9
A signed W-9 with the legal name that matches the certificate and the subcontract. Collecting it now saves the January scramble.
Signed subcontract with the insurance exhibit
The document that makes everything above an obligation rather than a courtesy — including what happens when coverage lapses.
For a printable version, use the 5-minute contractor verification checklist or the subcontractor onboarding checklist. For how to read the license result, see what contractor license statuses mean.
How TrackMyVendor automates this
- The sub gets one link listing exactly what they still owe — certificate, endorsements, W-9 — and uploads from their phone with no account to create.
- AI reads every coverage row on the certificate: policy type, limits, dates and policy numbers, so nobody retypes the PDF.
- The license is checked against the state board and re-checked daily for the life of the record.
Flow-down: passing the owner's requirements to every tier
The owner's contract usually tells you what insurance you must carry and what you must require of your subs: limits, additional insureds (often the owner, the lender and the GC), waiver of subrogation, primary and noncontributory. If those requirements stop at you, the gap is yours.
Flow-down works when three things line up:
One floor for every sub
A company standard every sub meets on every job — the minimum you will accept regardless of the owner.
Job-level overrides
The stricter limits and extra additional insureds that this owner's contract demands, applied to the subs on this job only.
The sub-tier clause
A requirement that your subs collect the same documents from their own subs, and produce them on request.
The clauses themselves — indemnity, additional insured, waiver of subrogation — are explained in the contractual risk transfer section of the risk management guide. For typical limits, see general contractor insurance requirements.
How TrackMyVendor automates this
- A company-wide default sets the minimums and required documents every sub is checked against.
- Each job carries its own requirements on top of the default, and subs who fall short on that job are flagged on it. Pro
Monitoring subs while the job runs
Prequalification answers "were they covered on day one". Most claims ask a different question: were they covered on the day it happened. Three things change during a job without anyone telling you:
- Policies renew on their own dates. A sub's workers' comp and general liability rarely expire on the same day; track each one, not one date per sub.
- Cancellations don't reach you. The certificate's cancellation box defers to the policy, and many policies don't promise notice to certificate holders.
- Licenses get suspended. A state board action doesn't touch the insurance, so it only shows up if someone checks the board again.
The practical cadence: chase renewals 30–60 days ahead, re-check licenses on long jobs rather than only at onboarding, and look at the whole roster weekly rather than when a superintendent asks.
How TrackMyVendor automates this
- Reminders at 90, 60, 30 and 7 days go to your team and to the sub, whose copy carries the upload link — so the renewal chases itself. Starter and above
- Every plan gets the Monday summary: one digest of every sub with something expired or expiring, sent to your team, never to the sub.
- Licenses are re-checked against the state board daily, so a suspension mid-project lands on the sub's record the day it is published.
When a sub's coverage lapses on site
It will happen. What matters afterwards is that you can show you acted, in order, in writing:
Confirm it
Call the sub's agent, not the sub. A late renewal and a cancelled policy are different problems.
Notify the sub in writing
State what is missing, what the subcontract requires, and the date you need it by.
Decide on the affected scope
With your superintendent, decide whether that sub's work pauses until a current certificate arrives. Your subcontract normally sets out your options, including whether payment can be held — follow it rather than improvising.
Check the replacement properly
The new certificate and endorsements go through the same requirements as the first ones. Renewals change limits and drop endorsements more often than you'd expect.
Record the dates
The lapse, the notice, the pause and the reinstatement. If something happened in between, those dates are your file.
Not legal advice. Stopping work and withholding payment are governed by your subcontract and your state's law. Have your attorney review the lapse and default provisions in your subcontract template.
Builder's risk vs. a sub's general liability
Two policies that are often confused, and cover different losses:
Builder's risk
Property insurance on the work itself
Covers the structure and materials during construction against fire, wind, theft and similar losses. Usually bought by the owner or the GC for the project.
Sub's general liability
Liability for what the sub does to others
Covers bodily injury and damage to other people's property caused by the sub's work — the policy that names you as additional insured.
Having builder's risk on the project doesn't reduce what you need from subs. Whether subs are covered under the builder's risk policy, and whether its insurer can pursue a sub who caused a covered loss, depends on the policy and on the waiver of subrogation wording in your contracts — read them together.
Every sub prequalified, monitored and on the record
Subs upload their certificate, endorsements and W-9 through a one-time link — no account, no portal. Every policy is tracked on its own dates, licenses are re-checked daily, and every step is timestamped. Your first 25 subs are free.