Subcontractor business

How to read a general contractor subcontract

Read a GC's subcontract in a set order: the documents it pulls in, your scope, payment and retainage, changes and claims, schedule and delay, risk transfer, and termination. Mark each clause accept, negotiate, or price.

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To read a general contractor's subcontract, go through it in a fixed order and mark every clause as accept, negotiate, or price into the bid. Start with the list of documents it incorporates, because those quietly become part of your deal. Then read your scope, the payment and retainage terms, how changes and claims work, the schedule and delay clauses, the indemnity and insurance requirements, and finally the termination and dispute sections. The goal is to know, before you sign, what you are promising, when you get paid, and what happens when things go wrong.

GC subcontracts are written by the GC's lawyers to protect the GC. That is normal. Some GCs use their own forms, and some start from industry forms such as AIA A401, the Standard Form of Agreement Between Contractor and Subcontractor. Either way, the burden of reading falls on you.

Step-by-step: reading the subcontract

1. Find the contract documents and flow-down clause

Look for language like "Subcontractor is bound to Contractor as Contractor is bound to Owner." That flow-down clause can import the prime contract's schedule, liquidated damages, warranty, and notice deadlines onto you. Ask for the prime contract, or at least the parts that flow down. On federal work, some clauses must flow down by regulation; the FAR prompt payment clause, for example, requires payment and interest penalty clauses in each subcontract and in lower tiers. See flow-down clauses explained for subcontractors.

2. Compare the scope to your bid

Check the scope exhibit line by line against your proposal, including your exclusions and clarifications. Watch for catch-all phrases like "all work shown or reasonably inferred" or "complete and operational system." If your bid excluded fire caulking, cutting and patching, or temporary power, make sure the subcontract says so. A scope gap you sign is a scope gap you pay for.

3. Read the payment clause twice

Answer these questions: When are pay apps due? How many days after the GC is paid do you get paid? Is it pay-if-paid (owner payment is a condition) or pay-when-paid (timing only)? What is the retainage rate, does it drop at a milestone, and is it released when your scope is done or when the whole project closes? What documents must come with each billing? See pay-if-paid vs pay-when-paid clauses explained and check the rules in prompt payment laws by state.

4. Find the change and claim deadlines

Look for how changes must be requested, who can authorize them, and how many days you have to give notice of a claim or a change in cost or time. Notice windows in a subcontract are often set shorter than the prime contract's, so the GC has time to pass your claim up. Missing one can waive the claim. Put each deadline on your project calendar.

5. Check schedule, delay, and back charge terms

Read whether you must follow the GC's schedule as it changes, whether there is a no damages for delay clause, whether liquidated damages pass through to you, and how back charges are noticed. A fair back charge clause requires written notice and a chance to fix the problem before the GC hires someone else.

6. Review indemnity and insurance

The hold harmless clause decides who pays when someone gets hurt or property is damaged. Broad forms can make you cover the GC's own negligence, and state law may limit how far that can go. Then send the insurance exhibit to your agent before you sign: limits, additional insured endorsements, primary and noncontributory wording, and waiver of subrogation. See additional insured endorsements explained.

7. Read termination and disputes last, but read them

Termination for default should require written notice and a cure period. Termination for convenience should pay you for work done, materials ordered, and demobilization. Note the dispute process (negotiation, mediation, arbitration, or court), the venue, and whether you must keep working during a dispute.

8. Check the exhibits and attachments

The body of the subcontract is often standard. The exhibits are where the job-specific traps live: the insurance exhibit, the safety requirements, the billing procedures, the schedule, the drawing and spec list, and sometimes a list of site rules with fines attached. Confirm the drawing list matches the set you bid, by revision date. If the GC attached a newer set, price the difference before you sign.

A one page subcontract review sheet

Mark each clause before you sign
ClauseWhat to look forDecision
Flow-downPrime contract terms imported; ask for a copyAccept / negotiate / price
ScopeMatches bid, exclusions carried overAccept / negotiate / price
PaymentDays to pay, pay-if-paid languageAccept / negotiate / price
RetainageRate, reduction, release triggerAccept / negotiate / price
Changes and claimsNotice days, who can authorizeAccept / negotiate / price
Delay and LDsNo damages for delay, LD pass-throughAccept / negotiate / price
Indemnity and insuranceBreadth, limits, endorsementsAccept / negotiate / price
TerminationCure period, convenience payment termsAccept / negotiate / price

Worked example: a plumbing sub's review

Say a plumbing sub is awarded a $640,000 subcontract on a 90-unit apartment building. Reading in order, the PM finds four problems: the scope says "complete plumbing systems," which picks up the site utilities the bid excluded; payment is pay-if-paid; retainage of 10 percent is released only at final completion of the whole project, about 14 months after the plumber's trim-out; and claims notice is 5 days.

The sub sends a short markup. It adds its exclusions as an exhibit, asks for pay-when-paid with an outside date, asks for retainage to drop after its scope is accepted, and asks for 10 days of notice instead of 5. The GC agrees to the exclusions and the notice change, holds firm on retainage, and accepts an outside payment date. The sub prices the financing cost of the held retainage into a small change in the contract value and signs. Nothing here is unusual. The difference is that the sub knows exactly what it signed.

Mistakes to avoid

  1. Signing without reading the incorporated documents.
  2. Assuming your bid exclusions carry over automatically.
  3. Ignoring notice deadlines until there is a claim.
  4. Letting your insurance agent see the requirements only after you start work.
  5. Starting work on a letter of intent with no payment terms.
  6. Treating every clause as non-negotiable. Many GCs accept reasonable markups.

Related guides and tools

Go deeper with construction contract clauses that hurt subcontractors, what to include in a subcontract agreement, and how to read a construction contract before signing. The subcontractor scope of work template helps you state scope clearly in your bid.

Smart Business Automator stores each subcontract with its key dates, insurance requirements, and retainage terms, and reminds your team before notice and billing deadlines. See subcontractor compliance automation.

Frequently asked questions

Can I negotiate a general contractor's subcontract?

Often, yes. Many GCs accept reasonable changes to scope, notice periods, and payment terms, especially when the request is short and specific. Some clauses may be fixed by the prime contract.

What is the most important clause in a subcontract?

For most subs, the payment and retainage terms, followed by scope and notice deadlines. Indemnity matters most when something goes wrong, so it deserves an attorney's look.

What does bound to the contractor as the contractor is bound to the owner mean?

It is a flow-down clause. It makes you take on the GC's obligations to the owner for your part of the work, so you need to know what the prime contract says.

Should I have a lawyer review every subcontract?

Have an attorney review your standard rider and any unusual or high-value subcontract. Train your PMs to use a review sheet on the rest and escalate anything outside your usual terms.

Sources

  1. AIA Austin: AIA Contract Documents available (2026 list, A401 Contractor and Subcontractor agreement)
  2. Acquisition.gov: FAR 52.232-27 Prompt Payment for Construction Contracts
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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