Subcontractor agreements are a critical component of the construction industry in Queensland. These agreements define the relationship between contractors and subcontractors, ensuring clarity in roles, responsibilities, and expectations. Governed by the Queensland Building and Construction Commission Act 1991 (QBCC Act), subcontractor agreements must comply with strict legal requirements to avoid penalties and disputes.
In this article, our building and construction lawyers, break down in-depth look at subcontractor agreements, their key elements, common challenges, and how to ensure compliance with Queensland law.
Key Takeaways
- Subcontractor agreements must comply with the QBCC Act, particularly Part 4A for commercial building contracts and Part 1B for domestic building contracts
- Written contracts are mandatory for all subcontracts, with specific requirements for contracts exceeding $10,000
- Key clauses include scope of work, payment terms, quality standards, dispute resolution, and termination conditions
- Non-compliance with the QBCC Act can result in significant penalties, including fines and licence suspension
- Clear communication and legal advice are essential to avoid disputes and ensure compliance

What is a Subcontractor Agreement?
A subcontractor agreement is a legally binding contract between a contractor and a subcontractor. It outlines the terms and conditions under which the subcontractor will perform specific tasks or services as part of a larger project.
These agreements are particularly important in the construction industry, where contractors often rely on subcontractors to complete specialised tasks, meet deadlines, or manage resource limitations.
Legal Framework for Subcontractor Agreements in Queensland
Subcontractor agreements in Queensland are governed by the QBCC Act. Compliance with this legislation is essential to ensure enforceability and avoid penalties.
Mandatory Written Contracts
- All subcontracts must be in writing
- For contracts exceeding $10,000 (including GST), the agreement must be documented before work begins
- For contracts valued at $10,000 or less, the written contract must be completed before the work is finished
Essential Contractual Elements
A compliant subcontract must include:
- Contractor’s details, including name and QBCC licence number
- Site information, such as the address of the building site
- Scope of work with a detailed description of tasks to be performed
- Completion date or method for determining this date
- Contract price or method for calculating the price
- Retention and security details, including the defects liability period
Retention and Security Limits
The QBCC Act imposes limits on retention amounts and securities:
- Before practical completion: Retention or security must not exceed 5% of the contract price
- After practical completion: Retention or security is limited to 2.5% of the contract price
Payment Terms
Payment provisions must comply with statutory timeframes:
- Head contracts: Progress payments must be made within 15 business days after a payment claim is submitted
- Subcontracts: Progress payments are due within 25 business days after submission of the payment claim
Prohibited Provisions
Certain clauses are prohibited under the QBCC Act:
- “Pay when paid” clauses, which make payment contingent on the contractor receiving payment from another party, are void and unenforceable
Key Clauses in a Subcontractor Agreement
To ensure clarity and compliance, subcontractor agreements should include the following key clauses:
Key Term | Description |
---|---|
Scope of Work | A detailed description of the tasks and services the subcontractor is expected to perform. This should be as specific as possible to avoid ambiguity. |
Duration of Contract | The agreement should specify the start and end dates of the subcontractor’s services or outline how the duration will be determined. |
Payment Terms | This section should include: |
• Rate of payment | |
• Payment schedule | |
• Invoicing process | |
• Conditions for payment, including retentions or hold-backs. | |
Quality Standards and Compliance | The agreement should outline expected quality standards and any regulatory or legal compliance requirements, particularly those specific to Queensland’s construction laws. |
Dispute Resolution | Specify the method for resolving disputes, such as mediation, arbitration, or litigation. |
Termination Clause | Outline the conditions under which the agreement can be terminated by either party, including notice periods and procedures. |
Confidentiality and Non-Disclosure | Include provisions to protect sensitive information related to the project or businesses involved. |
Subcontracting and Assignment | Define whether the subcontractor can further subcontract their responsibilities or assign the agreement to another party. |

Common Disputes in Subcontractor Agreements
Disputes often arise due to unclear terms or misunderstandings. Common issues include:
- Unclear scope of work: Ambiguities in defining tasks and deliverables
- Payment delays: Disputes over timing, amount, or conditions for payment
- Contract variations: Issues with managing changes to the project scope or pricing
- Compliance issues: Non-compliance with legal or safety standards
- Termination conditions: Conflicts over unclear or unfair termination clauses
- Liability and risk allocation: Disputes over responsibility for accidents, damages, or delays
- Quality of work: Disagreements over adherence to specifications and standards
Penalties for Non-Compliance
Failure to comply with the QBCC Act can result in:
- Fines up to $10,676 per offence
- Four demerit points per offence
- Licence suspension or cancellation for persistent breaches
Frequently Asked Questions
1. Why is a subcontractor agreement important?
A subcontractor agreement defines expectations, responsibilities, and liabilities, helping to avoid misunderstandings and ensuring legal recourse in case of disputes.
2. What should be included in a subcontractor agreement?
Key elements include scope of work, payment terms, project timeline, quality standards, dispute resolution mechanisms, termination clauses, and compliance with laws.
3. Are subcontractor agreements legally binding?
Yes, these agreements are legally binding contracts. Both parties are obligated to fulfil their contractual duties.
4. Can a subcontractor agreement be modified?
Yes, but any changes must be made in writing and agreed upon by both parties.
5. What happens if a subcontractor agreement does not comply with the QBCC Act?
Non-compliance can result in fines, demerit points, and even licence suspension or cancellation for persistent breaches.
By adhering to these guidelines and ensuring compliance with the QBCC Act, contractors and subcontractors can foster positive working relationships and avoid legal complications. For tailored advice on drafting or reviewing subcontractor agreements, consult an experienced construction lawyer.