Red Flags in a Subcontract Handed Down by the Main Contractor

When a main contractor hands you a subcontract, it is easy to treat the document as a formality standing between you and the work. That instinct is expensive. The subcontract was drafted by, or for, the party on the other side of the table, and its purpose is to transfer as much of the project's risk as possible from the main contractor down to the subcontractor. This is not dishonest; it is how the construction supply chain distributes exposure. But it means the document in front of you is not neutral, and the clauses that will hurt you most are rarely the ones that look aggressive. They are the quiet, technical provisions that shift liability in ways an SME subcontractor discovers only when something goes wrong.

The red flags are consistent across markets and across contract forms. Once you know the pattern, you can find them in an afternoon and negotiate the worst of them out before signing, which is the only point at which you have any leverage. After signature, the same words that looked like boilerplate become the mechanism by which your margin disappears. What follows is the field guide: the provisions that matter, why they matter, and what to push for.

Why the Subcontract Is Never Neutral

A main contractor's commercial objective is to be a conduit for risk, not a holder of it. Every obligation the main contractor owes the employer under the main contract, it would prefer to owe onward to a subcontractor, so that if the subcontractor fails, the cost lands on the subcontractor rather than the main contractor. This is achieved through flow-down and back-to-back drafting, and it is entirely legitimate up to a point. The problem is that main contractors routinely flow down obligations that do not fit the subcontract scope, impose payment terms that protect their cash flow at the expense of yours, and reserve rights of deduction and termination that are far wider than anything the employer holds over them. Reading the subcontract with that objective in mind is the first defence: assume every clause is allocating risk, and ask in each case whether the risk is landing where it can actually be managed.

Red Flag One: Back-to-Back and Flow-Down You Cannot See

The most common red flag is a clause that incorporates the terms of the main contract into the subcontract on a back-to-back basis, so that you are bound to the main contractor by the same obligations the main contractor owes the employer. In principle this can be reasonable. In practice it is dangerous for two reasons. First, you are frequently asked to accept flow-down without ever being shown the main contract, which means you are agreeing to obligations you have not read. Second, flow-down often drags across obligations that make no sense at subcontract level, such as programme constraints, design responsibilities, or liability caps calibrated to the whole project rather than your package.

The clauses that should never flow down uncritically are the ones that fix your liability by reference to the main contract value, impose the main contract's full delay damages on your smaller scope, or bind you to programme dates you had no part in agreeing. The protective moves are straightforward: demand sight of the main contract, or at least the relevant clauses, before signing; insist that flow-down is limited to obligations genuinely relevant to your scope; and require that any back-to-back liability is capped at the subcontract value, not the main contract value. Understanding where a change in scope actually originates in that chain is closely related to knowing your pricing model, a subject we cover in Fixed Price vs Remeasurement vs Cost-Reimbursable.

Red Flag Two: Pay-When-Paid and Conditional Payment

Payment clauses are where main contractors protect their cash flow directly at your expense. The classic red flag is a pay-when-paid or pay-if-paid provision, which makes the main contractor's obligation to pay you conditional on the main contractor first being paid by the employer. In its harshest form, pay-if-paid, you carry the risk of the employer's insolvency or dispute even though you have no contractual relationship with the employer and no ability to influence that payment. Some jurisdictions restrict or prohibit these clauses precisely because they push payment risk onto the party least able to bear it, but many do not, and in the GCC they remain common.

Beyond conditional payment, watch for extended payment periods that leave you financing the main contractor's project for sixty or ninety days, applications for payment that must satisfy onerous documentary conditions before they are even valid, and a right for the main contractor to withhold the entire application if any single line item is disputed. The protections to negotiate are a fixed payment period that does not depend on the employer paying, a right to be paid the undisputed portion of any application even where part is contested, and interest on late payment. If the main contractor will not remove a pay-when-paid clause, at minimum secure a longstop date after which you must be paid regardless of the employer's position.

Red Flag Three: Uncapped Liability and One-Sided Indemnities

A subcontract that leaves your liability uncapped is a subcontract that can cost you more than the entire value of the job. The red flag is the absence of any overall cap on liability, combined with broadly worded indemnities under which you agree to hold the main contractor harmless against loss, including consequential and indirect loss, arising from your work. On a package worth a few million, an uncapped indemnity for delay to the wider project, or for third-party claims, can generate exposure that dwarfs your contract sum and your insurance cover.

The disciplined position is to insist on an aggregate cap on liability, expressed as a percentage of the subcontract value or a fixed sum, with a clear exclusion of indirect and consequential loss. Indemnities should be limited to loss actually caused by your breach or negligence, not extended to any loss the main contractor happens to suffer that touches your scope. And every indemnity you give should be checked against your insurance: an indemnity that your insurer will not cover is a personal, uninsured liability sitting on your balance sheet. The instinct that signing feels like protection when in fact it creates exposure is a recurring one across construction contracting; we explored the broader version of it in Signing a Contract Feels Like Protection. It Is Not.

Red Flag Four: Wide Set-Off and Contra-Charges

Set-off clauses let the main contractor deduct sums from what it owes you. A narrow, reasonable set-off right is normal. The red flag is a set-off clause drafted so widely that the main contractor can withhold payment against alleged claims that are unquantified, unsubstantiated, or relate to entirely different matters. Combined with a right to levy contra-charges for supposed defects, delays, or back-charges for services the main contractor claims to have provided, a wide set-off clause becomes a tool to suppress your payment whenever the main contractor is under its own cash pressure.

Negotiate set-off down to sums that are genuinely due and either agreed or properly determined, not merely asserted. Require that any contra-charge is notified promptly, particularised, and substantiated before it can be deducted, and that you have a right to challenge it. The goal is to prevent the main contractor from converting a vague allegation into an immediate cash deduction, because once the money is withheld, the burden and cost of recovering it fall on you.

Red Flag Five: Liquidated Damages Without a Route to More Time

Delay damages in a subcontract are only fair if you have a matching mechanism to claim extension of time when the delay is not your fault. The red flag is a subcontract that imposes liquidated damages for late completion but strips out, narrows, or renders impractical the corresponding right to an extension of time. You are then exposed to damages for delays caused by the main contractor, by other subcontractors, by late access, or by the employer, with no contractual route to relief.

Check three things. First, that the extension of time clause covers the full range of events outside your control, including delays by the main contractor and other trades. Second, that the notice provisions for claiming extra time are achievable in practice and not buried behind unrealistically short deadlines; the same time-bar discipline that governs main contracts applies here, and the reasoning in The 28-Day Rule That Kills More Claims Than Any Dispute applies directly to subcontract notices. Third, that the liquidated damages rate is proportionate to your scope and capped, so a delay cannot generate damages exceeding a sensible fraction of the subcontract value.

How to Review Before You Sign

A subcontract review does not require a full legal department, but it does require a disciplined pass through the provisions that carry the most risk. Work through the document in a fixed order: payment terms and any conditional-payment wording; the liability cap and the breadth of indemnities; set-off and contra-charge rights; the delay damages and the matching extension-of-time mechanism; flow-down and back-to-back incorporation of the main contract; and the termination and suspension rights the main contractor reserves. For each, ask the same question: if this clause is triggered, who pays, and is it me, and is that fair given what I control. Where the answer is that you carry a risk you cannot manage or price, that clause is a negotiation item.

The leverage to change these terms exists only before signature. Once you have signed, the clauses are the deal, and the main contractor has no commercial reason to soften them. The half-day spent marking up the subcontract, or the cost of having a specialist review it, is trivial against the exposure the document can create. This is precisely the point at which outside commercial support pays for itself, and CALIM's contract prevention service exists to catch exactly these provisions before they are signed rather than argue about them after they bite.

Frequently Asked Questions

What are the most dangerous clauses in a construction subcontract?

The clauses that most often harm an SME subcontractor are conditional-payment provisions such as pay-when-paid or pay-if-paid, uncapped liability combined with broad indemnities, wide set-off and contra-charge rights, back-to-back flow-down of main-contract obligations that do not fit the subcontract scope, and liquidated damages imposed without a workable extension-of-time mechanism. None of these look aggressive on the page, which is exactly why they are dangerous. They allocate risk quietly and only reveal their effect when payment is withheld, a delay occurs, or a claim is made.

What is a back-to-back subcontract and why is it risky?

A back-to-back subcontract incorporates the terms of the main contract, so the subcontractor owes the main contractor the same obligations the main contractor owes the employer. It is risky when the subcontractor is asked to accept those terms without seeing the main contract, or when obligations calibrated to the whole project, such as delay damages or liability caps, are flowed down onto a much smaller package. The protection is to demand sight of the incorporated terms, limit flow-down to obligations genuinely relevant to your scope, and cap any back-to-back liability at the subcontract value rather than the main contract value.

Are pay-when-paid clauses enforceable?

It depends on the jurisdiction. Some legal systems restrict or prohibit pay-when-paid and pay-if-paid clauses because they transfer the risk of the employer's non-payment onto a subcontractor with no relationship to the employer. Others enforce them as written. In many GCC markets they remain common and enforceable. Because enforceability varies, a subcontractor should not rely on a clause being struck down. The safer course is to negotiate a fixed payment period that does not depend on the employer paying, or at minimum a longstop date by which payment must be made regardless of the main contract position.

Should a subcontractor sign without seeing the main contract?

No, not where the subcontract incorporates the main contract on a back-to-back basis. Signing up to obligations you have not read is signing a blank cheque. If the subcontract binds you to main-contract terms, you are entitled to ask for those terms, and a reasonable main contractor will provide the relevant clauses even if commercially sensitive pricing is redacted. If the main contractor refuses entirely, that refusal is itself a red flag and a reason to narrow or remove the incorporation clause before signing.

How can an SME subcontractor review a subcontract without a legal team?

Work through the highest-risk provisions in a fixed order rather than reading the document front to back: payment and conditional-payment terms, the liability cap and indemnities, set-off and contra-charges, delay damages and the extension-of-time mechanism, flow-down of the main contract, and termination rights. For each clause ask who pays if it is triggered and whether the risk is one you can control. Anything that puts an unmanageable or unpriced risk on you becomes a negotiation point. For contracts of any material value, a focused review by an external commercial specialist before signature is inexpensive relative to the exposure a single onerous clause can create.

The subcontract is the one moment in the whole job where the risk is still negotiable. Every clause you leave unchallenged is a risk you have agreed to carry, whether you read it or not.

Note: This article provides general information on subcontract risk and is not legal advice. The enforceability and effect of the clauses discussed depend on the specific drafting, the terms of the main contract, and the law of the applicable jurisdiction. Subcontractors should obtain advice tailored to the particular subcontract and project before signing or relying on any provision.