Signing works under purchase order terms: the shortest document, the widest clauses

Not every job comes with a subcontract. A growing share of trade work is contracted on purchase order terms: a PDF of general conditions incorporated by a one-line reference on the PO. The document is shorter, the signing moment more casual, and that is exactly the danger: the publicly published PO terms in our corpus carry some of the widest clauses we have analysed anywhere.

What the drafting says

Payment terms

14 to 62 days, the widest spread in the corpus, including end-of-month-plus drafting that quietly adds weeks to every invoice.

Time bar drafting

Absolute in 2 of 2 identifiable, the short document still finds room to extinguish late claims.

Consequential loss indemnity

2 of 3, a few lines of indemnity reaching beyond direct loss, in a document signed like a docket.

Termination for convenience

2 of 3, the job can end on notice, PO or not.

LD pass-through

3 of 3, every PO terms document passes head-contract delay exposure down.

Retention

Often absent, PO terms frequently skip retention, and make up for it elsewhere in the risk allocation.

Figures read from publicly published documents analysed in the Australian Subcontract Index corpus, August 2026.

How it compares

Security of payment legislation applies to construction work regardless of what the paperwork is called. A PO for construction work engages the same Act as a formal subcontract.

One PO terms document in the corpus caps liquidated damages at 10% of the order value, proof that fair positions exist in this format too. The pattern, though, runs the other way.

What to do about it

Treat the PO like the contract it is

The one-line "subject to our standard terms" incorporates every clause in that PDF. Download it, read it, and price it before the work starts, because starting work is usually acceptance.

Watch end-of-month payment drafting

"Payment 30 days from end of month of invoice" is not 30 days: an invoice on the 2nd waits nearly 60. Calculate the real worst case before you quote.

Your quote can push back

A line in your quotation ("supply subject to the attached terms" or "LDs capped at 5% of order value") creates a battle of forms instead of silent acceptance. It won't always win, but silence always loses.

The version you were handed is not the pattern. It's a specific document.

Templates get amended, schedules get filled in, and the risk lives in the details. The free scanner reads your actual document, every clause, benchmarked against real Australian subcontracts, in about two minutes.

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Common questions

Does the Security of Payment Act apply to purchase orders?

Generally yes. The Acts apply to contracts for construction work (and related goods and services) whether or not the arrangement is labelled a subcontract. Your payment claim rights don't disappear because the paperwork was a PO.

Am I bound by terms I never signed?

Often, yes. Starting work after receiving a PO that references standard terms is usually treated as accepting them. The time to object is on receipt, in writing, not at dispute time.

Are PO terms better or worse than a full subcontract?

Neither inherently, but the published PO terms we hold show the format is used to carry long payment terms, broad indemnities and pass-through liability in very few pages. The brevity is the trap: fewer pages get less scrutiny while doing the same legal work.

Keep reading

General information for Australian subcontractors, not legal advice. Patterns describe publicly published documents analysed in the Index corpus, and standard forms are described from their published, unamended editions; the document you are handed governs, and only a reading of that specific document (or advice on it) can tell you your position. Written by Mat Kennedy at The Construction Contracts Co.