Consideration In NZ Contract Law: What Counts As Valid Value?

If you’re running a small business, you’re probably signing (and relying on) contracts all the time - quotes, service agreements, supplier terms, partnership arrangements, and more.

One of the most common questions we hear is: “Is this actually enforceable?” And very often, the answer comes back to one core concept in consideration in contract law: did each party give something of value?

Consideration can feel a bit technical, but the practical takeaway is simple: if you want your agreement to hold up if there’s a dispute, you need to make sure it’s properly structured from day one.

What Is Consideration In NZ Contract Law (In Plain English)?

In NZ contract law, “consideration” is the value each party exchanges as the price for the other party’s promise.

In most everyday business contracts, consideration is what separates:

• a binding deal (enforceable), from
• a promise (often not enforceable on its own).

Consideration doesn’t have to be money. It can be:

• payment (a fixed fee, an hourly rate, a commission)
• supplying goods
• performing services
• agreeing to do something you weren’t already required to do
• agreeing not to do something (e.g. a restraint or a confidentiality commitment)

In other words, if your business is asking someone to commit to something (or you’re committing yourself), the law generally expects that commitment to be supported by a “give and take”.

It also helps to remember that consideration is just one piece of contract validity. You’ll also want clarity on offer/acceptance, intention to create legal relations, capacity, and certainty - the essentials behind what makes a contract legally binding.

Why Consideration Matters For Small Businesses

Consideration isn’t just a legal “tick box”. It’s a practical risk management tool.

If there’s a dispute later (late delivery, non-payment, a client trying to walk away, a supplier changing terms), consideration is often one of the first things lawyers look at to test whether there’s an enforceable agreement.

For small businesses, this matters because you’re often:

• moving fast (agreeing things over email or text)
• changing scope mid-project
• offering discounts to keep a good client
• agreeing to “help out” without formal paperwork

Those are the exact situations where consideration problems appear - especially when you’re varying a deal (changing the original contract) or making a one-sided promise.

In NZ, most contract disputes are still analysed using long-standing common law principles (including consideration), alongside key statutes. The Contract and Commercial Law Act 2017 consolidates several contract-related laws (for example, rules around cancellation for misrepresentation and other matters), but it doesn’t replace the common law requirement of consideration for ordinary contracts.

What Counts As Valid Consideration? (Real-World Examples)

The good news is that consideration usually isn’t hard to find in business-to-business deals. It just needs to be clearly expressed and structured.

1) Money (Including Deposits And Part-Payments)

This is the most straightforward type of consideration: one party pays, the other delivers goods/services.

Common examples include:

• a fixed project fee for a marketing package
• an hourly rate for consulting
• a deposit to secure stock or book in work

Tip: write payment terms clearly (due dates, invoicing triggers, late fees/interest if used), and make sure they align with what you’re actually doing in the business.

2) A Promise To Do Work (Services As Consideration)

In many service-based businesses, consideration is the promise to perform the work itself.

This is why it’s so important that your Service Agreement clearly sets out deliverables, timelines, and what happens if the scope changes.

If your agreement is vague (“we’ll help with marketing as needed”), you can end up arguing not just about performance, but about what the “value” actually was.

3) Goods Or Supply Commitments

If you supply products, consideration can be:

• the goods supplied, in exchange for payment
• a commitment to reserve stock
• a commitment to supply exclusively or at a set price for a period

Even where the amount paid is small, consideration can still exist - the law generally doesn’t require it to be “equal” or a fair deal, just that something of value is exchanged.

4) “Giving Up A Right” (Forbearance)

Consideration can also be a promise not to do something you’re entitled to do.

Business examples include:

• agreeing not to pursue a debt immediately if the customer agrees to a repayment plan
• agreeing not to enforce a contractual right (for a period) if the other party provides something in return
• settling a dispute where each side gives up claims as part of the settlement

This often comes up when you’re trying to preserve a commercial relationship without going straight to enforcement.

5) Mutual Promises (Even Before Anything Happens)

Many contracts are formed before either side performs. That’s still fine - the consideration is the exchange of promises.

For example:

• You promise to deliver a website by a certain date.
• The client promises to pay the agreed fee.

Those mutual promises can be enough consideration to form a binding contract, as long as the terms are sufficiently clear and there’s intention to be bound.

What Usually Does NOT Count As Consideration (Common Traps)

This is where many small business owners get caught out - not because they’re doing anything wrong, but because business decisions evolve and contracts don’t always keep up.

1) Past Consideration (Value Given In The Past)

As a general rule, “past consideration” isn’t valid consideration. That means you can’t usually make a promise now in exchange for something that already happened.

Example: You finish a rush job for a client. After the work is done, they say, “We’ll pay you an extra $1,000 for helping us out.” If they later change their mind, that extra payment promise may be hard to enforce because the “value” (the rush job) was already completed.

If you want to charge additional amounts for variations, urgency, or out-of-scope work, it’s safer to agree it before you perform the extra work (and record the variation properly).

2) Doing What You’re Already Obliged To Do

Another classic consideration issue is when one party promises “extra” for the other party simply doing what they were already required to do under the original contract.

Example: A supplier agrees to deliver 1,000 units by Friday under the existing contract. Mid-week they ask for an extra fee just to deliver by Friday. If they were already obliged to deliver by Friday, there may be no new consideration for the extra fee.

In practice, the law around contract variations can be nuanced, and outcomes can depend on the facts (including whether the variation involves new obligations, changed risk allocation, or other measurable benefits). But from a business perspective, the safer approach is to document what new obligation or benefit is being exchanged.

3) “Free” Promises With No Exchange

If you say:

• “We’ll give you a 20% discount going forward,” or
• “We’ll waive the cancellation fee,” or
• “We’ll extend your deadline by two months,”

…and the other party doesn’t give anything in return, you may have created a promise that’s difficult to enforce (or may create uncertainty if you later want to revert to the original terms).

If you genuinely want it to be binding, you typically need either:

• fresh consideration (something in return), or
• a different legal mechanism, such as using a deed (more on that below).

4) Uncertain Or Illusory Value

Consideration needs to be real, not an “empty” promise.

Example: “We’ll pay you if we feel like it” or “We’ll order from you if we need anything” may be too uncertain to count as meaningful consideration (and may create broader enforceability issues).

This is why well-drafted terms matter - especially around minimum order quantities, exclusivity, milestones, and termination rights.

Consideration And Contract Changes: How Do Variations Work In Practice?

If you’re running a business, you’ll almost certainly vary contracts. Projects change. Pricing changes. Timelines slip. Scope expands.

The problem is: a contract variation can become difficult to enforce if it isn’t supported by fresh consideration, or if it doesn’t comply with any formal requirements in the original contract (for example, a “variations must be in writing” clause). There are some limited exceptions and workarounds in certain situations, but they’re fact-specific and shouldn’t be relied on as a default.

Typical Contract Variation Scenarios

• Scope creep: You do extra work “to be helpful” and later try to charge for it.
• Discounting: You agree to reduce a fee to keep the client happy, then the relationship deteriorates.
• Deadlines shifting: You agree to new delivery dates without documenting what happens to milestone payments.
• Payment plans: A customer can’t pay on time, so you restructure payments.

So What Should You Do?

From a practical standpoint, if you’re changing a deal, aim to:

• record the variation in writing (even if it’s by email, depending on the situation)
• clearly identify what each side is giving (the consideration)
• make the change consistent with the original agreement (check whether variations must be in writing)

For more formal changes - especially where the amounts are significant or you’re changing key risk terms - a Deed of Variation can be a cleaner option.

It can also be important to think ahead: if the relationship falls apart, how do you end it cleanly and enforce your rights? Your contract should ideally cover termination triggers and exit steps, and you may also need a structured approach to terminating a contract lawfully.

Do You Always Need Consideration? (Deeds, NDAs, And Other Exceptions)

Most standard commercial agreements rely on consideration. But there are situations where you can still create a binding commitment without the usual “exchange of value”.

1) Deeds

A key exception is a deed. In general, deeds can be enforceable without consideration, as long as they meet formal requirements.

Deeds can be useful where you want to make a binding promise and there isn’t an obvious exchange - for example, when one party is giving a release, granting a right, or confirming an arrangement.

If you’re unsure whether you need a deed or a standard agreement, it helps to understand the difference between deed and agreement before you sign anything.

2) Confidentiality / Non-Disclosure Arrangements

Confidentiality arrangements are common in small business - pitching to a potential investor, sharing supplier pricing, discussing a collaboration, or giving a contractor access to your systems.

In practice, many businesses use an NDA-style document to protect sensitive information. Whether consideration is required can depend on how the document is structured and the surrounding arrangement (for example, mutual confidentiality obligations and/or other promises in the broader deal can provide consideration). If there’s genuinely no consideration, you may need to structure it differently (including, in some cases, using a deed) to reduce enforceability risk.

The safest approach is to use a properly prepared Non-Disclosure Agreement that fits your situation, especially if you’re sharing commercially valuable information.

3) Promissory Estoppel (A Limited “Fairness” Principle)

There are also legal doctrines that can sometimes stop a party from going back on a promise, even where consideration is missing - one example is promissory estoppel.

This area is fact-specific and not something you want to “bet the business” on. But it’s worth knowing it exists, because it often comes up where one party relies on a promise to their detriment (for example, you invest time/money based on a promise that the other party later tries to withdraw).

For business owners, the takeaway is: don’t rely on exceptions. It’s usually cheaper and safer to structure the deal properly upfront.

4) Formalities Still Matter (Especially For Signed Documents)

Even if consideration exists, you still want the agreement executed properly - particularly for higher-value deals, long-term arrangements, or where you might need to enforce the document later.

That includes basics like making sure the right legal entity signs, the signature blocks are correct, and attachments are referenced. These details can be the difference between a smooth enforcement process and a messy dispute, which is why it’s worth understanding what makes a signed document legally binding.

Key Takeaways

• Consideration in NZ contract law is about exchange: each party must generally give something of value for the other party’s promise.
• Consideration can be money, goods, services, mutual promises, or giving up a right - it doesn’t need to be “equal”, just real and identifiable.
• Common consideration pitfalls for small businesses include past consideration, “extra payment” for work you’re already obliged to do, and one-sided promises with no exchange.
• Contract variations are where consideration issues show up most often - if you change scope, price, or timeframes, record it properly and make sure there’s a clear exchange of value.
• Some documents (like deeds) may be enforceable without consideration, but formal requirements apply and the best approach is still to structure things clearly from day one.
• If you’re unsure whether your agreement is enforceable, it’s worth getting advice before you rely on it - fixing contract problems after a dispute starts is usually more expensive.

If you’d like help drafting or reviewing a contract (or documenting a contract change so it’s enforceable), you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.