A client sends you a draft services agreement. Or a project kicks off and someone from the client's side asks you to "just sign the standard form." Either way, you are looking at a document that will govern what you must deliver, what you will be paid, and — most importantly — what happens when things do not go to plan.
An engineer-client agreement is not simply a record of the commercial deal. It is the legal framework that defines each party's obligations, allocates risk between you, and determines who bears the cost if something goes wrong during or after the engagement. It sits alongside any applicable professional standards and, where your work touches building or construction, intersects with security of payment legislation. Getting the document right at the outset is far cheaper than unpicking it later.
How the scope of services is defined
The scope of services clause is the foundation of the entire agreement. If it is vague, every subsequent clause — payment, liability, termination — becomes harder to apply.
A well-drafted scope clause should cover:
- What you will deliver — reports, designs, inspections, certifications, advice, or a combination, described with enough specificity to identify when the work is done.
- What the client must provide — access to site, existing drawings, test data, approvals, or any other input your work depends on. If the client's failure to deliver delays you, this needs to be captured.
- Milestones and completion dates — if the engagement runs in stages, each stage should have its own deliverable and (where possible) a completion date tied to the client's cooperation.
- Exclusions — anything adjacent to your work that you are not performing. Silence on exclusions regularly produces scope-creep disputes.
For ongoing relationships — a retainer or a framework arrangement under which individual projects will be assigned — consider separating the master agreement (which sets the standing commercial and legal terms) from individual work orders or statements of work. Each work order can then define the scope, deliverables, fees, and timeline for that specific engagement without reopening the master terms.
The scope creep trap
The most common clause-level problem in engineering agreements is not a badly drafted clause — it is a scope clause that was accurate at signing but never updated as the project evolved. Build a variation mechanism into the agreement from the start: any change to the scope that the parties agree must be documented in writing before the additional work begins.
How the price is calculated and when payment falls due
Engineering work is often priced in one of several ways — lump sum for a defined deliverable, time-and-materials for ongoing advisory work, or a fee schedule tied to milestones. Each method carries different payment mechanics, and the agreement should spell out whichever applies.
The payment clause should address:
- The fee structure — fixed fee, hourly or daily rate, or schedule of rates, and whether GST is included or added.
- Invoicing schedule — when invoices may be issued (upon milestone completion, monthly, on delivery of a report).
- Payment period — how many days after the invoice date the client must pay.
- Late payment — whether interest accrues on overdue amounts and at what rate.
- Expenses and disbursements — travel, third-party laboratory fees, subcontractor costs. These should either be included in the fee or reimbursable at cost with the client's prior approval.
- Deposit or mobilisation fee — if you bear upfront costs before any deliverable is produced, a deposit protects your position.
If your services relate to building or construction work, you may also have rights under state and territory security of payment legislation. In New South Wales the relevant Act is the Building and Construction Industry Security of Payment Act 1999; equivalent Acts operate in Queensland, Victoria, Western Australia, South Australia, and the territories. These Acts give you a statutory right to make progress payment claims on a reference date, regardless of what the contract says about timing, and provide an adjudication mechanism if a payment schedule is not issued. A well-drafted agreement should not conflict with those rights.
The late payment trap
A clause that says "payment terms are 30 days" without specifying what the consequences of late payment are is largely unenforceable as a deterrent. If you want interest on late invoices, name a rate. If you want the right to suspend services on non-payment after notice, include that right expressly.
What each party owes the other under Australian law
Before negotiating liability and indemnity clauses, it is worth understanding the baseline Australian law imposes — because you cannot contract your way out of all of it.
Under section 60 of the Australian Consumer Law (ACL), if you provide services to a consumer, you give a statutory guarantee that those services will be rendered with due care and skill. This cannot be excluded by contract. Importantly, the fit-for-purpose guarantee that applies to goods does not apply to professional engineering services. But the care and skill guarantee stands.
For business-to-business agreements, where ACL consumer guarantees may not apply, the agreement can more freely allocate risk — subject to the proportionate liability regime discussed below.
How liability is capped and consequential loss is handled
The limitation of liability clause is the clause that most often decides the financial outcome of a dispute. It deserves careful attention.
Monetary cap. Engineers typically seek to cap their aggregate liability at a fixed dollar amount — often the fees paid under the agreement, the value of the relevant work order, or the amount recoverable under their professional indemnity insurance. Clients will push back, particularly on large or high-risk projects. The negotiation usually lands somewhere between one and three times the total fees, though the right number depends heavily on the risk profile of the work.
Common variants the other side will push for:
- No cap at all, or a cap tied to the value of the project rather than your fees
- Carve-outs for fraud, wilful misconduct, or death and personal injury (which are broadly reasonable)
- Carve-outs for breaches of intellectual property provisions or confidentiality obligations (watch these carefully)
Consequential loss exclusion. Australian courts have confirmed that a well-drafted exclusion of consequential or indirect loss is enforceable between commercial parties. The clause should identify by category the losses that are excluded — loss of revenue, loss of profit, loss of production, loss of anticipated savings, loss of business opportunity. Courts read these clauses carefully and will not infer that a loss type is excluded unless it is listed or clearly caught by the drafting.
Time limitation. You can include a clause that limits the period within which a client may bring a claim — for example, requiring any claim to be notified within 12 months of the relevant deliverable. This sits alongside, but does not replace, statutory limitation periods. Courts will generally uphold a contractually shortened period provided it is not unconscionable in the circumstances.
Proportionate liability. Australian states and territories have each enacted civil liability legislation that, for apportionable claims (generally economic loss and property damage caused by negligence or misleading conduct), limits each concurrent wrongdoer's liability to their proportionate share of the loss. In New South Wales, the Civil Liability Act 2002 contains these provisions; Queensland has equivalent provisions in the Civil Liability Act 2003; most other states have similar regimes. Proportionate liability operates by default, but some agreements attempt to contract back to joint and several liability by including a broad indemnity clause — which effectively circumvents the statutory regime. Be alert to indemnities that are drafted more broadly than they appear.
The consequential loss trap
The word "consequential" does not carry a settled legal meaning in every context. Courts have sometimes read consequential loss clauses narrowly, including only losses that fall outside the first limb of the rule in Hadley v Baxendale, and excluding losses that were directly foreseeable. To avoid ambiguity, list the categories of loss you intend to exclude rather than relying on the word "consequential" alone.
How disputes are resolved
Even well-drafted agreements produce disputes. A dispute resolution clause determines how they are escalated — and can significantly reduce the cost of resolving them.
Most engineering agreements follow a tiered structure:
- Senior-level negotiation — a trigger requiring the parties' senior representatives to meet and attempt resolution within a defined period (commonly 20 business days) before any formal process begins.
- Mediation — if negotiation fails, a requirement that the parties attempt mediation through an agreed mediator or a mediation body such as the Resolution Institute or LEADR before proceeding to court.
- Litigation or arbitration — the final step. If you deal mostly with private sector clients, arbitration (particularly for large-value disputes) can offer faster resolution and confidentiality. If your clients include government entities, court proceedings may be more appropriate.
Include a governing law clause specifying which state's law governs the agreement and which courts have jurisdiction. You should nominate the jurisdiction in which you operate — not wherever the client happens to be incorporated.
The dispute resolution trap
A clause that requires good-faith negotiation but sets no time limit creates a mechanism the other side can use to delay proceedings indefinitely. Set a clear period — say, 20 business days from written notification of a dispute — after which either party can escalate to the next tier.
Optional clauses worth considering
Depending on the nature and scale of the engagement, the following may also be worth including:
- Confidentiality — if you will receive commercially sensitive information from the client (financial data, proprietary processes), a standalone confidentiality clause that survives termination protects both sides.
- Subcontracting — if you intend to engage specialist subconsultants, the agreement should confirm your right to do so and clarify whether the client's consent is required.
- Insurance — specify the types and minimum levels of insurance you and the client each agree to maintain during the engagement (professional indemnity, public liability, workers compensation as applicable).
- Force majeure — events outside either party's control that excuse or delay performance; particularly relevant for projects with site-access dependencies.
- Assignment — restrictions on either party assigning their rights under the agreement without the other's consent, which matters if either party might be acquired or restructured.
How Artificer Legal can help you get this right
Engineering agreements routinely contain clauses that look standard but carry significant risk. At Artificer Legal, when we review or draft an engineering client agreement, we focus on four things most practitioners underweight:
We push back on indemnity clauses that circumvent proportionate liability. A broadly worded indemnity can, in effect, require you to compensate the client for loss caused partly by the client's own conduct. We identify these and either remove them or narrow them to losses you actually caused.
We scrutinise limitation of liability caps in both directions. A cap that is too low may not reflect your actual exposure on a complex project; a cap that is too high may exceed your PI cover. We match the cap to the risk profile of the engagement and your insurance position.
We draft scope clauses that hold up mid-project. Variation mechanisms are the clauses clients most resist including and engineers most need when projects evolve. We help you make the case for them and draft them so they work in practice.
We align payment terms with security of payment rights. Where your services relate to building or construction, we make sure the payment clause does not inadvertently extinguish your rights under the applicable Security of Payment Act.
If you are about to sign or issue a client agreement, speak with one of our commercial lawyers before you do.
The clause that most often determines the outcome
If there is one clause that separates a working agreement from one that collapses in a dispute, it is the consequential loss exclusion — not because it is the most negotiated clause, but because it is the most misdrafted one. Engineers almost universally want to exclude loss of profit, loss of revenue, and loss of opportunity from their liability exposure. Without a properly drafted exclusion, a court may award those losses regardless of what the parties thought they had agreed. Listing the excluded categories explicitly, rather than relying on the word "consequential," is a small drafting change that can make an enormous financial difference.
In summary, a sound engineer-client agreement should clearly define the scope of work and variation process, set out a payment structure that protects your cash flow and aligns with statutory rights, cap your liability at a realistic level, exclude consequential losses by category, and provide a structured path for resolving disputes without defaulting immediately to litigation. Each clause connects to the others — a strong scope clause makes the payment clause easier to enforce, a clear liability cap makes the indemnity clause easier to negotiate, and a well-drafted dispute resolution clause makes all of it less likely to be tested in court.