What is a
Back-to-Back Subcontract?
A back-to-back subcontract is one drafted so the subcontractor bears, for its scope, the same obligations, risks and deadlines the main contractor owes the employer: if the employer can claim against the contractor, the contractor can pass that claim down. In UAE practice the label is used loosely, and the gap between a genuine back-to-back and a subcontract that merely incorporates the main contract by reference is where disputes are born.
Incorporation by reference is not enough
A single clause deeming the main contract to apply mutatis mutandis leaves a tribunal to guess which obligations translate, who exercises the employer's discretions at subcontract level, and how time periods map. The stronger method restates the key terms in the subcontract itself: scope, programme obligations, variation and claims machinery, liability caps and carve-outs, each adjusted to the subcontract level deliberately. Whatever is not restated should be incorporated with a clear order of precedence and access to the main contract's actual text, prices redacted if needed.
The clauses that must genuinely align
Three alignments matter most. Notice windows: the subcontractor's claim deadlines must be shorter than the main contract's, or the contractor receives claims it can no longer pass up. Payment: pay-when-paid mechanics need longstops and carve-outs to survive scrutiny. And liability tails: because decennial liability keeps the main contractor exposed to the employer for ten years, subcontractor indemnities and document retention must run just as long. The full chain analysis is in our guide to subcontracting in UAE construction.
Does a back-to-back clause automatically flow everything down?
No. A bare incorporation-by-reference clause leaves major questions open: which employer discretions the contractor now exercises, how notice periods map, and which main contract terms make no sense at subcontract level. UAE tribunals resolve those ambiguities case by case, which is exactly the uncertainty good back-to-back drafting exists to remove.
Do notice time-bars flow down to subcontractors?
Only if the subcontract says so, and they must be tighter, not identical. If the main contract requires notice within 28 days, a subcontractor notifying the contractor on day 27 leaves no time to pass the claim upstream. Well-drafted UAE subcontracts set subcontractor notice windows deliberately shorter and make them conditions precedent.
Does decennial liability apply to subcontractors?
Not directly towards the employer: the Civil Code fixes decennial liability on the main contractor and supervising engineer. But the main contractor stays exposed for ten years for work its subcontractors built, so back-to-back subcontracts should carry indemnities, insurance obligations and record-keeping that match the full decennial horizon.
Drafting or fighting a subcontract?
Senior counsel only. We draft back-to-back subcontracts and run subcontract disputes for contractors and specialists across the UAE.
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