What is a Back-to-Back Contract?

Summary

• A back-to-back contract is a subcontract that mirrors the key terms of a main (head) contract, passing obligations and risk down the chain.
• It ensures that if you are liable to a client, you can hold your subcontractor responsible for the same obligations, timelines and standards.
• These contracts are commonly used in projects involving multiple parties, especially construction or service delivery arrangements.
• This guide explains back-to-back contracts for Australian business owners, including how they work and key risks when drafting them.
• It is prepared by LegalVision’s business lawyers, a commercial law firm that specialises in advising clients on commercial contracts.

Tips for Businesses

Ensure your subcontract properly reflects your obligations under the head contract, including timing, quality and liability. Avoid simply copying terms without tailoring them to the subcontract relationship. Check for gaps, especially around payment and dispute resolution, to ensure you can recover losses if issues arise downstream.

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On this page

• How Does a Back-to-Back Contract Work?
• Key Issues
• In the Event of a Dispute
• Key Takeaways
• Frequently Asked Questions

A back-to-back contract is an arrangement where the terms of one contract are mirrored in another, typically passing obligations and risks down a supply chain. In practice, a head contractor aligns its subcontract with its agreement with the client, ensuring that key duties such as timelines, standards, and liabilities are carried through so it is not left responsible for matters outside its control. This article explains what a back-to-back contract is, how it works, and the key issues to consider when drafting one.

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How Does a Back-to-Back Contract Work?

It is common for multiple businesses to work on a construction project. However, the client usually engages with only one head contractor who is responsible for delivering the project. From the client’s perspective, the head contractor protects their interests by being solely liable for the entire construction project. This means that if there is a dispute, the client only needs to refer back to the head contractor.

However, a head contractor usually cannot complete the work by themselves – the head contractor may engage several subcontractors with different specialties to assist. In this case, the head contractor should seek back-to-back provisions in its contracts to ensure that they are not directly liable to the client for work completed by a subcontractor. As such, the head contractor will ensure that their construction contract with the subcontractor mirrors their contract with the client. In particular, a head contractor should ensure that their subcontractors receive the following key terms:

• relevant obligations; 
• liabilities;
• the rights of the subcontractor; and
• dispute resolution clauses.

Obligations of the head contractor passed down to the subcontractor may include:

• responsibility for maintaining the design for aspects of the project;
• specified date for completion of that part of the project; and
• quality and standard of work.

A subcontractor should receive certain rights from the head contractor, including:

• entitlements for an extension of time to complete the work;
• rights when a variation of the work is needed; and
• suitable compensation against the head contractor if the head contractor breaches a term of the subcontract.

It is also common for a head contract to require that the head contractor seek the client’s consent before engaging a subcontractor. 

Key Issues

It can be challenging to ensure that the head contract and the subcontract set out all of the obligations and entitlements required to protect the relevant parties fully. Issues arise where the subcontract needs to complement the head contract effectively. Simply citing the same contractual terms between the client and the head contractor may not make sense for some provisions or leave out other important issues that apply solely to the relationship between the head contractor and the subcontractor.

Matters that arise in a subcontract, but not the head contract, could include the:

• head contractor’s obligation to pay the subcontractor even if the client has not paid the head contractor; or
• subcontractor’s liability to the head contractor for their delay of work, which also delays the obligations outlined in the head contract.

A head contractor must ensure the subcontract includes all relevant clauses from the head contract and those clauses that apply solely to the relationship between the head contractor and subcontractor.

In the Event of a Dispute

In the case of dispute resolution clauses, not properly drafting the subcontract can significantly impact the outcome of a dispute between the contracting parties.

If the subcontractor has a dispute against the client, the subcontractor should make clear the extent to which the head contractor must pursue a claim. Finally, if the dispute resolution process involves mediation or arbitration, the decision will need to bind all parties. This must be in a particular way that is present and consistent across both contracts.

Key Takeaways

To make back-to-back contracts work effectively, both head contractors and subcontractors need to be acutely aware of their respective obligations and liabilities. These obligations should be properly passed down from the head contract and clearly stated in the relevant subcontract.

LegalVision provides ongoing legal support for businesses through our fixed-fee legal membership. Our experienced construction lawyers help businesses manage contracts, employment law, disputes, intellectual property, and more, with unlimited access to specialist lawyers for a fixed monthly fee. To learn more about LegalVision’s legal membership, call 1300 544 755 or visit our membership page.

Frequently Asked Questions