What is the difference between an AS 4000 and AS 2124 contract?
Last reviewed July 5, 2026
AS 4000 is a more modern contract, focusing on project management and risk allocation. AS 2124 is older and less flexible, often seen as more traditional. AS 4000 includes updates on dispute resolution and variations, which are clearer than in AS 2124.
Key points
- AS 4000 is newer and more user-friendly.
- AS 2124 is an older, traditional contract.
- AS 4000 has clearer terms on variations.
- Dispute resolution is better in AS 4000.
AS 4000 is designed to suit a broader range of projects, providing clearer guidance on issues like variations and disputes. AS 2124, while still used, lacks some of the flexibility and clarity found in AS 4000, making it less adaptable for modern projects.
How Alloovium helps
Alloovium helps by pulling and structuring contract data, making it easier to compare and understand the differences.
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General information for Australian construction professionals — not legal advice. Verify jurisdiction-specific requirements with the relevant regulator.