Alex is Sprintlaw's co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
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If you run a small business, you’re probably making “contracts” all the time - quoting jobs, selling products online, negotiating with suppliers, or agreeing to services over email.
The tricky part is that not every statement that looks like an offer is actually an “offer” in the legal sense. In New Zealand contract law, the difference between an offer and an invitation to treat can decide whether you’re already legally locked in, or whether you still have room to negotiate (or say no).
In this guide, we’ll break down the key differences between an offer vs invitation to treat in plain English, with practical examples that come up in day-to-day business. We’ll also cover how acceptance works, where businesses get caught out, and what you can do to reduce your legal risk from day one.
What’s The Difference Between An Offer And An Invitation To Treat?
At a high level:
- An offer is a clear promise to be bound on specific terms, if the other party accepts.
- An invitation to treat is an invitation for someone else to make an offer (or to start negotiations). It’s not usually binding by itself.
This distinction matters because a contract generally forms when these building blocks line up:
- one party makes an offer
- the other party accepts the offer
- there’s an intention to create legal relations and (usually) some exchange of value
If what you said (or displayed, advertised, or emailed) is only an invitation to treat, then the other person’s “yes” isn’t necessarily acceptance - it might be the first real offer in the process.
If you want a deeper refresher on how contracts come together, it can help to understand what makes a contract legally binding in New Zealand, because offer and acceptance are only part of the picture.
Why Small Businesses Get This Wrong
In a busy business setting, people often use “offer” in the everyday sense (like “special offer!” or “offer accepted!”). But contract law uses “offer” in a more technical way.
That’s where disputes can come from - for example:
- a customer claims you “had to” sell at an advertised price
- a supplier says you’re committed because you “accepted the quote”
- someone insists an email chain created a binding deal, even though you thought you were still negotiating
Common Business Examples: Offer Vs Invitation To Treat
The easiest way to understand offer vs invitation to treat is to look at everyday scenarios small businesses deal with in New Zealand.
1) Advertising And Marketing (“$99 Today Only!”)
Most advertisements are treated as an invitation to treat, not an offer. They’re generally seen as inviting customers to come in and make an offer to buy.
Why? Because a business typically needs control over things like:
- stock availability
- eligibility (for example, trade-only pricing)
- quantity limits (to prevent one buyer taking everything)
That said, advertising is still regulated. Even if it isn’t an “offer” in contract law terms, you still need to be careful under the Fair Trading Act 1986 (for misleading or deceptive conduct) and general consumer protection expectations. So while you may not be contractually bound to supply, you can still get into trouble if your advertising is misleading.
2) Online Stores: Product Listings And “Add To Cart”
For many eCommerce businesses, product listings are usually an invitation to treat. The customer places an order (their offer), and you accept it when you confirm the order (or dispatch the goods), depending on how your terms are written and how your checkout process is set up.
One common trap: some automated “order received” emails are only acknowledgements (not acceptance), while other messages (or actions like dispatch) may be treated as acceptance. This is one reason why strong website terms matter: they can clarify when acceptance occurs and what happens if there’s a pricing error or stock issue. If you sell online, it’s often worth having properly drafted Website Terms And Conditions so you’re not relying on assumptions.
3) Price Tags And Goods On Shelves
A classic example: goods displayed with a price (like on a shelf or menu board) are usually an invitation to treat, not an offer. The customer makes the offer when they bring the item to the counter (or place an order), and the business accepts by processing the sale.
This matters when:
- a label is wrong
- a promotion is unclear
- your staff accidentally quotes the wrong price in-store
You may not be contractually obliged to sell at the displayed price if no acceptance has happened yet - but you still need to manage the consumer law risk around pricing representations.
4) Quotes, Estimates, And Proposals
This is a big one for service-based businesses (tradies, consultants, creative agencies, IT providers, marketers, and more).
A quote can be an offer, but it depends on how it’s written and the context. If your “quote” is really just pricing information or a starting point for negotiation, it might be an invitation to treat.
To avoid confusion, it helps to be consistent in your language (for example, “estimate” vs “fixed quote”), and to define when the deal becomes binding (for example, when the client signs, pays a deposit, or you confirm the booking in writing).
If you’re unsure where your quoting process sits legally, it may help to read about when a quotation is legally binding, because the line between “pricing info” and a true offer can be surprisingly thin.
5) Tenders And Requests For Quotes (RFQs)
If you issue an RFQ or invite tenders, that process is often an invitation to treat. Tender responses are commonly treated as offers, and you may be able to choose whether to accept one.
But tenders can be nuanced. Depending on how the request is framed (and the process rules you set), you may create obligations about how you’ll run the tender, or even circumstances where you must consider or accept a conforming bid. So watch out for tender rules you publish. If you promise a particular process (for example, “lowest price will win” or “tenders close at 5pm and will be evaluated on X criteria”), those statements can create legal expectations - even if you didn’t intend them to.
When Does A Contract Actually Form (And When Can You Still Walk Away)?
In most business situations, the real risk is assuming you’re “not committed yet” when the other side believes the deal is already done.
To reduce that risk, you need to understand the moment a contract forms. Usually, that moment is when:
- an offer is made on sufficiently clear terms, and
- the offer is accepted clearly (and not “accepted subject to…” changes), and
- both parties intend to be legally bound
Acceptance Must Match The Offer
If the other party responds with changes (“Yes, but can you do it for $X instead?”), that’s generally not acceptance - it’s a counteroffer. At that point, the original offer may no longer be open, and the negotiation continues.
For small businesses, this comes up a lot in email threads and messages where people move quickly and use informal language.
“Subject To Contract” And Similar Phrases
If you want to negotiate without being bound yet, phrases like “subject to contract”, “subject to signing”, or “draft agreement to follow” can help signal that you don’t intend to be legally bound until a formal document is signed.
But these phrases aren’t magic words. What matters is the overall context and conduct of both parties. If you start performing the work, taking payment, or acting like the deal is final, a court may find there’s a contract even if you planned to “paper it later”.
If you’re negotiating something significant, a Contract Review can help you understand whether you’re about to accept terms that don’t match your commercial expectations.
Why The Offer Vs Invitation To Treat Distinction Matters For Your Business Risk
Understanding the difference between an offer and an invitation to treat isn’t just academic - it affects real business outcomes, including whether you can enforce the deal, whether you can exit it, and what happens if something goes wrong.
1) Pricing Mistakes And Stock Issues
If your product listing or advertisement is an invitation to treat, you usually have more control over whether to accept a customer’s order (for example, if you discover a clear pricing error).
However, you still need to handle this carefully. Consumer-facing businesses must be mindful of the Fair Trading Act 1986, and for goods and services supplied to consumers, the Consumer Guarantees Act 1993 can also apply (depending on the situation). The legal analysis can get nuanced quickly, especially if you’re dealing with “trade” vs “consumer” customers.
2) Disputes About What Was Promised
If a customer thinks your ad was an offer, they may argue you promised to supply at a certain price or under certain conditions.
Even when the law treats the ad as an invitation to treat, the bigger practical issue is often evidence: what was said, what was understood, and what your terms and processes show.
3) Supply Chain And B2B Negotiations
In B2B deals, the invitation-to-treat concept often shows up in “pricing lists”, catalogues, capability statements, and proposals. A supplier might provide standard rates (invitation to treat), and each purchase order might be the customer’s offer that the supplier can accept or reject.
Having clear Terms Of Trade can help you control the contracting process so you’re not accidentally accepting purchase orders with unfavourable terms (like broad indemnities, unrealistic timeframes, or payment traps).
Practical Tips To Avoid “Accidental Contracts” In Your Day-To-Day Sales Process
Most contract problems don’t come from one dramatic moment - they come from small process gaps that repeat over and over.
Here are practical steps you can put in place to reduce the risk of accidentally creating a contract (or missing the moment when one forms).
1) Be Clear Whether Your Quote Is Fixed Or An Estimate
If you provide services, decide what your default position is and stick to it:
- Estimate: pricing may change depending on scope, discovery, or unknowns.
- Fixed quote: you’re likely taking on more risk, and you’ll want clear exclusions and variation rules.
Then, back that up in writing. If you say “this is a fixed quote valid for 14 days and acceptance is by signing and paying a deposit”, you reduce room for argument about whether the quote was an offer, and whether it was accepted.
2) Control When You “Accept” Orders
For online and B2B sales, decide when acceptance happens and make it consistent. For example:
- “We accept your order when we send an order confirmation email”
- “We accept your order when we dispatch the goods”
- “We reserve the right to reject an order for stock or pricing reasons”
Your systems (checkout flow, invoices, email templates, and staff scripts) should align with that position.
3) Use A Written Agreement For Ongoing Service Relationships
If you provide ongoing services (marketing, IT, consulting, trades maintenance, professional services), a tailored Service Agreement can help avoid disputes about scope, timeframes, payment, variations, and what happens if either side wants to end the arrangement.
This can also make it clearer when negotiations end and the binding deal starts - which is often where offer/acceptance arguments happen.
4) Train Your Team On “Contract-Creating” Language
Your team doesn’t need to become lawyers, but they should know that certain phrases can create risk.
For example, “Yep, that’s locked in” or “We’ll definitely do it for that price” can be treated very differently than “That should be fine - I’ll send through our confirmation once we’ve checked availability and finalised the paperwork.”
5) Don’t Rely On Templates For High-Value Deals
Templates can be a starting point, but they often don’t match how your business actually sells and delivers - which is where disputes start.
If you’ve got a high-value customer, complex scope, or meaningful liability risk, it’s worth getting the contract reviewed or drafted properly so your terms match your real-world processes.
Key Takeaways
- The difference between an offer and an invitation to treat can decide whether you’re already legally bound, or whether you’re still negotiating and free to decline.
- An offer is a clear promise to be bound on specific terms if accepted, while an invitation to treat is usually an invitation for the other party to make an offer.
- Common invitations to treat include many advertisements, online product listings, price tags, and tender invitations - but the details and context still matter.
- Quotes can be especially risky: depending on wording and conduct, a “quote” might be an offer (and a client’s “yes” might be acceptance), so it’s important to be clear about validity periods, scope, and how acceptance occurs.
- You can reduce disputes by controlling when acceptance happens, using clear written terms (like Website Terms And Conditions or Terms Of Trade), and documenting key deals with a tailored Service Agreement.
- If you’re unsure whether you’ve made an offer (or accepted one), getting legal advice early can help you avoid expensive disputes later.
If you’d like help tightening up your quoting process, reviewing your terms, or putting the right contracts in place, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
