Most agency-client disputes don't arise from malicious intent — they arise from different expectations that were never written down. A client who believed revisions were unlimited. An agency that assumed their standard hourly rate applied to change requests. A dispute over who owns the brand guidelines after the relationship ends. A well-structured service agreement eliminates these ambiguities before they become problems.
The difference between a service agreement and a statement of work
A service agreement (or master services agreement) is the overarching contract that governs the agency-client relationship. It sets out the standard terms that apply to all work — payment terms, liability, confidentiality, IP ownership, and dispute resolution.
A statement of work is a project-specific document that sits under the service agreement. It defines the scope, deliverables, timeline, and fees for a particular engagement. Together, they form a complete and enforceable contract.
Many agencies combine both into a single document for smaller engagements. This is practical, but it means the standard terms need to be reviewed and re-agreed with each new project. For ongoing client relationships, a master service agreement signed once — with individual SOWs attached for each project — is more efficient.
Payment terms that actually protect your cash flow
Late payment is one of the most common operational problems for agencies. Your service agreement should specify payment terms clearly: the invoice amount or schedule, the due date (30 days from invoice is standard; negotiate for 14 days where possible), the consequences of late payment, and the process for disputing an invoice.
Late payment interest — typically calculated at a specified rate above the RBA cash rate — should be included as a standard clause. Most clients will never trigger it, but having it in the contract changes the psychology of late payment from an inconvenience into a breach with consequences.
For new clients or large projects, a deposit — typically 30–50% of the total fee — should be required before work begins. This is standard practice and any professional client will accept it. If a prospective client refuses to pay a deposit, that is information worth having before you commit resources.
Intellectual property: who owns what
IP ownership is the most frequently disputed clause in agency contracts. The default position in Australia is that IP created by contractors belongs to the contractor unless the contract says otherwise. As an agency, you are a contractor — so unless your contract specifies that IP transfers to the client on payment, you may retain ownership of the work you created.
Most agencies transfer IP to clients on payment — this is what clients expect and it's commercially reasonable. But the contract should specify this clearly: 'Upon receipt of full payment, the agency assigns to the client all intellectual property rights in the deliverables.'
The contract should also address background IP — tools, frameworks, processes, and methodologies that the agency developed independently and uses across multiple client engagements. Background IP should remain the agency's property. The client receives a licence to use it as incorporated into their deliverables, but the agency retains the right to use those same tools for other clients.
Liability limitations
Agency service agreements should include a limitation of liability clause that caps the agency's total liability to the client at the value of the fees paid under the relevant SOW (or over a specified prior period for ongoing engagements).
Without this clause, an agency could theoretically be liable for consequential losses — loss of revenue, loss of profit, reputational damage — that vastly exceed the fee charged. A web agency that builds a site with a security vulnerability could face claims far beyond what the project was worth.
The clause should also exclude liability for indirect and consequential losses, including but not limited to loss of profit, loss of business opportunity, and damage to reputation.
Your service agreement is your primary protection in every client relationship. Invest in getting it right once, and it works for you on every engagement that follows.