Cracking the Code: An Introduction to the Security of Payment Act (Part 1)

Welcome to the first instalment of our six-part series on the Security of Payment Act (SOPA). For anyone involved in the construction industry, from subcontractors to head contractors and developers, understanding this legislation is not just beneficial—it's fundamental to financial survival.
The construction industry is the lifeblood of our economy, but for decades, it was plagued by a chronic illness: poor cash flow. It was a world where "the cheque's in the mail" was a common refrain, and smaller contractors were often starved of cash, waiting months for payment from parties higher up the contractual chain. This imbalance of power could, and often did, lead to insolvency, project delays, and immense financial distress.
In response to this crisis, the New South Wales Parliament enacted the
Building and Construction Industry Security of Payment Act
1999 (SOPA).
This powerful legislation fundamentally changed the landscape of construction payments. This series will break down the Act, and in this first part, we introduce its core purpose and principles.
What is the Security of Payment Act?
At its heart, SOPA is a statutory scheme designed to ensure that any person who carries out construction work, or supplies related goods and services, gets paid promptly. It creates a fast-tracked, interim dispute resolution process that operates alongside, and often much faster than, traditional court proceedings or arbitration.
The Act is underpinned by a simple but revolutionary philosophy: "pay now, argue later."
This principle is designed to ensure that money flows down the contractual chain without being held up by lengthy and expensive legal disputes about the final value of the work. The goal is to keep cash circulating, allowing contractors to pay their suppliers, employees, and overheads, and to keep the project moving forward. It provides a mechanism for a quick, interim decision on payment, which can then be argued in more detail later if necessary, but only after the money has been paid.
What is the Purpose of SOPA?
The primary objective of SOPA is to remedy the cash flow problems that have historically afflicted the construction sector. It achieves this by:
- Creating Statutory Rights to Payment: It grants a person who has carried out construction work a legal right to receive progress payments, regardless of whether the contract they signed provides for it.
- Establishing a Rapid Adjudication Process: It sets up a quick and informal dispute resolution process called "adjudication," where an independent adjudicator makes a binding interim decision on the amount of a progress payment.
- Prohibiting "Pay When Paid" Provisions: The Act makes it illegal for a contract to make payment to a subcontractor conditional on the head contractor first being paid by the principal.
Essentially, SOPA provides a powerful tool for contractors to enforce their right to payment without getting bogged down in costly and time-consuming litigation.
Who and What Does SOPA Cover?
SOPA has a very broad reach. It applies to virtually any construction contract, whether written or oral, for work carried out in New South Wales. This includes contracts for:
- The erection, alteration, repair, or demolition of buildings and structures.
- Roadworks, power lines, and pipelines.
- Electrical, plumbing, and air-conditioning installation.
- Architectural, design, and surveying services.
- The supply of materials related to construction work.
This means that everyone from head contractors, subcontractors, and suppliers to consultants like engineers and architects can rely on the Act to secure payment. The main exception is for contracts with a person who resides in or proposes to reside in the premises where the work is done (i.e., residential home building contracts with the homeowner).
Coming Up in the Series…
We have now covered the "what" and the "why" of SOPA. But how does it work in practice? How do you make a claim, and what happens if someone refuses to pay?
Key Takeaways
By the end of this series, you will have a comprehensive understanding of this critical piece of legislation and how you can use it to protect your business.

Senior Solicitor
Email: kristen@hntlegal.com.au








