- Why the differences survive in two common law countries
- Words that mean different things on each side of the Pacific
- The format gap: plain English versus the US drafting tradition
- Where the law itself differs, not just the language
- Where a contract lawyer earns their fee
- The governing law clause decides which meaning wins
If a US customer or joint venture partner sends you a contract, the first surprise is that it is in English and comes from a common law system. The second surprise, once you actually read it, is how different it is from the Australian contracts you are used to. The same words carry different legal meanings, the document looks like it was drafted in another era, and the statute law underneath it is not the law you know. None of that means the deal is doomed. It does mean that treating a US contract as an Australian contract with American spellings is a fast way to sign something you do not fully understand.
Why the differences survive in two common law countries
Both Australia and the United States inherited English common law, and in broad outline the law of contract on each side of the Pacific is the same creature: offer, acceptance, consideration, breach and damages. That is where the resemblance starts to fade.
The United States has no single national contract law. Each state has its own, and for the sale of goods all states except Louisiana apply Article 2 of the Uniform Commercial Code (UCC), which diverges from the common law in important ways. Australia, by contrast, runs on largely uniform national and state legislation, from the Corporations Act 2001 (Cth) to the state Sale of Goods Acts. International harmonisation efforts such as the International Chamber of Commerce's Incoterms standardise shipping terms, but they do not touch the underlying law of contract. So while academics talk about "global convergence", at the negotiating table the two systems remain genuinely different.
Words that mean different things on each side of the Pacific
The sharpest traps are the words both sides think they understand. A short list:
- Joint venture: In Australian law "joint venture" is not a defined category. Whether a particular arrangement amounts to a partnership, with fiduciary duties and joint liability, depends on the substance of the deal, not the label: in United Dominions Corporation Ltd v Brian Pty Ltd [1985] HCA 49 the High Court treated an arrangement described as a "joint venture" as a partnership in substance, and found fiduciary duties arising even before the formal agreement was signed. In most US states the position is starker. Under s 202 of the Revised Uniform Partnership Act, people who carry on a business for profit as co-owners form a partnership whether or not they intend to, and a joint venture is generally treated as a partnership for liability and fiduciary purposes. If your US counterparty assumes the word "joint venture" creates partner-style duties, and you assume it does not, you are negotiating two different deals.
- Partner: In Australia the word carries statutory weight. Under s 1 of the Partnership Act 1892 (NSW), partnership is "the relation which exists between persons carrying on a business in common with a view of profit", and partners owe fiduciary duties to each other and are jointly liable for the business's debts. In US commercial usage "partner" is thrown around loosely, to mean a collaborator or co-founder, without those consequences. If a US draft describes you as a "partner", check whether the word is description or legal characterisation.
- Affiliate: US contracts define "affiliate" constantly, usually to mean entities that control, are controlled by, or are under common control with a party. Australian statute law has no such default. The Corporations Act 2001 (Cth) defines related body corporate (s 50), related entity (s 9) and associate (ss 10-17) with precision, and each means something different. "Affiliate" is not one of them. If the contract uses "affiliate" and Australian law governs, the word means whatever the contract says it means, so the definition deserves real scrutiny rather than a skim.
- Stock: In US usage "stock" is equity, what Australians call shares. In Australia "stock" usually means trading stock, that is, inventory, or government stock. A US "stock purchase agreement" is a share sale agreement; an Australian clause about "stock" may be about the goods on the shelves. Misreading the two in an asset purchase or a purchase price adjustment is easy and expensive.
- Dates: US documents put the month first. 03/04/2026 is 4 March in the US and 3 April in Australia. In a contract full of notice periods and completion dates, a month can change hands. Where a date matters, spell the month out or use an unambiguous format in the document itself.
The format gap: plain English versus the US drafting tradition
Australian legal drafting embraced plain English from the late 1980s, prompted in part by the Victorian Law Reform Commission's 1987 report, Plain English and the Law. Modern Australian contracts come with headings, numbered clauses, defined terms and reasonably short sentences.
Much US commercial drafting never made that journey. A US contract can look like a 1950s Australian precedent: clauses running for pages without headings, definitions buried mid-sentence, and boilerplate repeated across dozens of sections. It is tempting to respond by rewriting the document into plain English. Resist that urge, for two reasons. First, the density is usually deliberate: US courts read contracts literally and imply little, so US drafters put every contingency in writing as a way of allocating risk. Secondly, a "style clean-up" of the other side's draft invites a renegotiation of substance, because every deleted sentence is a clause the other side's lawyers will want back.
The practical move is the opposite of rewriting: get a translation of the US draft into plain English that explains what each clause actually does, then negotiate substance on that basis.
Where the law itself differs, not just the language
Some differences are matters of substance rather than vocabulary, and they change the outcome of a cross-border deal. Three of them matter most in practice:
- Sale of goods: In the US, Article 2 of the UCC governs contracts for the sale of goods in every state except Louisiana. Its rules on formation, additional terms in acceptances and implied warranties differ from the common law and from the Australian state Sale of Goods Acts, so a goods contract can behave very differently depending on which side of the Pacific it is enforced on.
- Writing requirements: Under s 2-201 of the UCC, a contract for the sale of goods priced at US$500 or more is not enforceable unless there is a writing signed by the party being sued (some states have adopted 2022 amendments raising that threshold to US$5,000, so the governing state's version needs checking). Australia never adopted a general Statute of Frauds: most contracts, including sales of goods, can be made orally and enforced, with writing required only for specific categories such as guarantees and land contracts, for example s 126 of the Instruments Act 1958 (Vic). The practical consequence cuts both ways: an Australian business that assumes a handshake creates a binding deal may find the US side unenforceable, while a US party that assumes "no signed contract, no deal" may be surprised that the Australian side is already bound.
- Governing law: A US-drafted contract will almost always nominate a US state's law and a US forum for disputes. That choice decides which meaning of "joint venture", "affiliate" or "stock" wins, and which writing rules apply. It is routinely the most important clause in the document, and the one most often skimmed.
Where a contract lawyer earns their fee
A commercial lawyer's real work in a US-Australia deal starts before anything is signed. They can read a US draft and explain, clause by clause, what it actually commits you to, and flag the definitions that will bite later. Where Australian law is the governing law, they can reconcile US drafting concepts with the defined terms in the Corporations Act 2001 (Cth) so that "affiliate", "related body corporate" and "associate" mean what your side needs them to mean. And the structural judgement calls are genuinely theirs: whether a joint venture should be an incorporated company, a partnership or an unincorporated contractual arrangement is a decision with tax, liability and fiduciary consequences that no article can make for you.
Artificer Legal's commercial team regularly reviews US-drafted contracts for Australian businesses and negotiates the governing law, dispute resolution and definitional clauses that decide how the deal will actually operate.
The governing law clause decides which meaning wins
The single most expensive mistake in a US-Australia contract is not the unfamiliar jargon or the walls of boilerplate. It is assuming that a word that means one thing at home means the same thing in the contract. "Joint venture", "partner", "affiliate" and "stock" all have different legal content in the two systems, and when they collide, the governing law clause picks the winner. Before you sign, know which law governs, know what the defined terms mean under that law, and have someone who works in both systems explain the document to you in plain English.
In short: the two systems share a common law heritage but diverge in terminology, drafting style and statute, from the UCC's writing requirements to the meaning of "affiliate". Read the definitions, check the governing law clause, and get Australian advice on the US draft before the deal is signed.