The Security of Payment Act 1999 (NSW) also known as SOPA provides a fast, enforceable legal process for resolving payment issues in the building and construction industry. It allows contractors, subcontractors, and suppliers to claim progress payments and recover unpaid amounts without going to court.
While commonly associated with commercial projects, Payment Act now applies to residential building work, including owner-occupier contracts.
This article explains how the Act works, how it applies to home builders and homeowners, and what you need to do to comply.
What is the Security of Payment Act?
The Security of Payment Act (SOPA) gives people working in construction a legal right to regular payments for the work they’ve done or services they’ve provided even if their contract doesn’t explicitly provide for it.
It applies to:
- Construction and building work
- The supply of goods and services related to building
- Residential and commercial projects
- Formal written contracts or oral agreements.
The Security of Payment Act is to:
- Ensure fast and fair payment
- Resolve payment disputes quickly
- Create certainty in construction cash flow
- Prevent unfair contract terms
For a full explanation of the law, see the NSW Government’s SOPA overview.
Key Aspects of the Security of Payment Act (SOPA)
Below are the core features of the Act including several provisions that affect residential construction work.
Legal Right to Progress Payments
Contractors and suppliers can claim progress payments for work done up to a certain date, even if the contract is silent on progress claims.
Making a Valid payments Claim
A valid Payment Act payment claim must:
- Be in writing
- Describe the work or services completed
- State the amount claimed
- Include a legislative reference: “This is a payment claim made under the Building and Construction Industry Security of Payment Act 1999 (NSW)”
Payments Schedule Obligations
Recipients of a payment claim (including homeowners) must respond within 10 business days (or sooner, if the contract specifies).
A valid payment schedule must:
- State the amount being paid
- Explain why any amount is withheld
- Include supporting reasons and evidence
SOPA Applies to Residential Building Work
As of 1 March 2021, the Security of Payment Act applies to residential projects where the homeowner lives or intends to live in the property.
This includes:
- New home builds
- Renovations
- Extensions
Mandatory SOPA Guide for Residential Contracts
Residential contracts over $20,000 must include the Security of Payment Guide issued by NSW Fair Trading.
Penalties for not including it:
- Up to $8,800 for companies
- Up to $4,400 for individuals
Adjudication Process
Disputes can be referred to an adjudicator, who will make a binding decision within 10-20 business days. Adjudication is:
- Fast
- Cost-effective
- Legally enforceable
Enforcement Rights
If a determination is made and not paid:
- The unpaid amount can be enforced as a court judgment.
- Contractors can seek garnishee orders, seize property, or begin bankruptcy or liquidation proceedings.
Right to Suspend Work
If a valid claim is ignored or unpaid:
- The contractor can suspend work until the matter is resolved
- Suspension must follow correct SOPA procedures and notices
Ban on “Pay-When-Paid” Clauses
The Security of Payment Act prohibits clauses that delay payment based on the payer receiving money from another party (e.g. head contractor waiting for the principal to pay).
Strict Deadlines and Legal Consequences
SOPA works on tight timeframes. Missing deadlines can mean:
- Losing the right to dispute a claim
- Being liable for the full amount claimed
- Having no further chance to raise objections during adjudication
SOPA in Action: Payment Claims and Schedules
How to Make a Payment Claim:
- Prepare a clear, written claim
- Reference the correct reference date in the contract
- Include all necessary wording
Serve the claim in accordance with the contract and the Act
How to Respond to a Payment Claim:
- Serve a payment schedule within 10 business days
- Clearly state the amount you will pay
- Provide detailed reasons and evidence if paying less
- Failing to respond means you’re liable for the full amount
What If You Don’t Respond?
- You can’t dispute the claim later.
- The contractor can apply for adjudication or go straight to court.
- Then the debt becomes legally enforceable.
Recent Case: Ceerose Pty Ltd v A-Civil Aust Pty Ltd (2024)
This case clarified that:
- All reasons for withholding payment must be included in the payment schedule
- You cannot raise new reasons during adjudication
- Vague or generic statements aren’t sufficient.
Takeaway: Always prepare a complete, detailed, and timely response.
Adjudication: Fast Dispute Resolution Under SOPA
Adjudication is SOPA’s core dispute mechanism. It’s quicker and cheaper than going to court.
You can apply for adjudication if:
- No payment schedule was issued
- The scheduled amount is less than the claimed amount
- The payment has not been made by the due date
Key Timeframes:
- 10 business days to apply after payment becomes due or schedule is served
- Adjudicator appointed within 5 business days
- Determination usually made within 10 business days
The outcome is binding and enforceable, but parties can still pursue the matter in court later.
Practical Advice for Builders, Contractors & Homeowners
For Builders and Contractors:
- Issue valid claims with the correct SOPA wording
- Keep detailed records: photos, contracts, communications
- Follow reference dates and deadlines
- Seek legal advice if you’re unsure especially before adjudication
For Homeowners (Owner-Occupiers):
- Don’t ignore payment claims
- Understand your obligation to respond with a payment schedule
- Respond on time and in detail
- Legal advice is strongly recommended if disputing payment
Common Challenges with SOPA
- Missing deadlines: SOPA is unforgiving even 1 day late can cost you.
- Lack of documentation: Poor records and weak position.
- Complexity: SOPA processes (like adjudication) can be technical and time-sensitive.
- Financial risk: Ignoring a claim could mean paying thousands more than expected.
- Enforcement issues: Even with a judgment, recovery can be difficult if the other party is insolvent.
Why SOPA Matters in Residential Construction
SOPA has created a more balanced legal environment for residential construction in NSW. It:
- Encourages timely payments
- Provides quick dispute resolution
- Protects smaller contractors from unfair practices
- Holds homeowners and developers accountable
Guidance for Payment Claims
Navigating the construction legal landscape requires understanding how the Security of Payment Act applies to specific situations under Building and Construction Law. The regulatory framework can be complex, particularly when dealing with contract variations and dispute resolution procedures.
Construction professionals should familiarize themselves with their rights and obligations under the updated legislation to prevent disputes and ensure project success.
Need assistance with owner-occupier payment claims or understanding your rights under the Security of Payment Act? Contact Citilawyers today for clear advice and support tailored to your construction needs.
