Back-to-back contracting

Definition

Back-to-back contracting passes the obligations, risks and timelines a main contractor owes its client through to subcontractors on matching terms. It avoids gaps where the prime is liable upward but cannot recover from the subcontractor, and relies on careful flow-down drafting.

Example

A contractor binds its subcontractor to the same delivery dates and penalties it owes the principal, on a back-to-back basis.

Why this is a business risk

Where back-to-back terms are not properly flowed down, the prime contractor is caught in a gap: liable to the client for a default it cannot legally recover from the subcontractor. Differences in limitation periods, liability caps or force-majeure definitions between head and subcontract can silently create this gap even where parties intended alignment.

How to manage it

• Map the head contract obligations before finalising the subcontract to ensure every material obligation is flowed down accurately.
• Pay particular attention to liability caps, liquidated damages, insurance, IP rights and termination rights, as these are the terms most likely to diverge.
• Use defined-term flow-down provisions that incorporate head contract definitions by reference rather than rewriting them.
• Store both the head contract and every related subcontract together so the relationship is visible when an issue arises.
• Review the subcontract whenever the head contract is amended to keep the two in step.