Laws That Encourage Competition In The Marketplace: A Basic Guide (2026 Updated)

When you’re growing a business, “competition” can feel like a headache - more rivals, more price pressure, more noise online.

But healthy competition is also what keeps markets fair, keeps customers confident, and gives good businesses a real chance to stand out.

This 2026 update is designed to give you a practical, plain-English overview of the key New Zealand laws that encourage competition in the marketplace, what behaviour tends to cause problems, and what you can do to stay on the right side of the rules from day one.

Why Do Competition Laws Matter For Your Business?

Competition laws aren’t just there to “punish big corporates”. They’re designed to make sure:

• businesses compete on merit (price, quality, service, innovation);
• customers get accurate information and fair treatment;
• new entrants can actually enter a market without being blocked by anti-competitive tactics; and
• markets don’t get distorted by collusion, intimidation, or misleading conduct.

In practice, these rules help you as a business owner because they create a more predictable playing field. If a competitor tries to coordinate pricing behind the scenes, bully suppliers into exclusivity, or mislead customers with “too good to be true” claims, there are legal tools to deal with it.

Just as importantly, competition laws also set boundaries for your sales tactics, distributor arrangements, advertising, and negotiations with other businesses. A lot of competition risk comes from everyday decisions - not dramatic “cartel meetings in a dark room”.

If you’re ever unsure whether a strategy crosses the line, it’s worth getting tailored advice early. Fixing a contract or campaign before it goes live is usually far cheaper (and less stressful) than dealing with a complaint later.

What’s The Main Competition Law In New Zealand?

The big one is the Commerce Act 1986. It’s New Zealand’s core competition law and it covers conduct that harms competitive markets.

The Commerce Act is enforced primarily by the Commerce Commission (often called the “ComCom”). Depending on the conduct, enforcement can lead to investigations, court proceedings, fines, and orders to stop or change behaviour.

The Commerce Act Targets Conduct That Reduces Competition

The Act focuses on behaviour that has the purpose, effect, or likely effect of substantially lessening competition. That’s the central concept you’ll see across a range of rules.

In plain terms, it’s about whether the conduct makes the market less competitive in a meaningful way - for example, by making it harder for other businesses to compete, reducing consumer choice, or keeping prices artificially high.

Cartels And Collusion: Agreements Between Competitors

One of the strongest features of the Commerce Act is its prohibition on cartel conduct.

Cartel conduct usually involves competitors making arrangements like:

• price-fixing (agreeing on prices, discounts, surcharges, or fees);
• market allocation (splitting customers, territories, or projects between competitors); and
• output restriction (agreeing to limit supply, production, capacity, or service availability).

It doesn’t need to be a formal written agreement. It can be inferred from communications and behaviour. Even “casual” chats between competitors can create real legal risk if they drift into “let’s not undercut each other” territory.

Practical tip: if you attend industry events or are in competitor-heavy group chats, be careful about discussing pricing, margins, tender strategy, or who is servicing which customers.

Mergers And Acquisitions: When Buying A Competitor Needs Extra Care

Competition law isn’t only about misconduct - it also looks at market structure. Some mergers or acquisitions can substantially lessen competition (for example, if a market goes from four competitors to two, or if a dominant player buys an emerging rival).

If you’re buying a business, selling your business, or considering acquiring a competitor, it’s smart to treat competition law as part of your due diligence - alongside financials, staff, contracts, and IP. The details matter, especially around market definition, competitor constraints, and future expansion plans.

Market Power: Using Strength In A Way That Harms Competition

New Zealand competition law also deals with conduct by businesses with substantial market power. The law isn’t trying to punish a business for being successful - it’s focused on how that power is used.

Examples that can raise concerns include behaviour aimed at:

• blocking or deterring new entrants;
• cutting off supply or distribution channels to force competitors out; or
• locking customers in so they can’t reasonably switch.

Not every aggressive strategy is illegal. But if your business is large (or becoming large in a niche), it’s worth getting advice before rolling out strategies that could be viewed as “exclusionary”.

How Do Consumer And Fair Trading Laws Encourage Competition?

Competition isn’t only about how businesses deal with each other. It’s also about customers being able to make informed choices.

That’s where New Zealand’s consumer protection framework comes in - particularly the Fair Trading Act 1986 and the Consumer Guarantees Act 1993.

When customers can trust pricing and product claims, they can compare businesses properly. That drives real competition based on value - not hype or deception.

The Fair Trading Act 1986: Don’t Mislead Customers

The Fair Trading Act prohibits misleading and deceptive conduct in trade, along with specific types of false or misleading representations (for example, about price, performance, country of origin, or endorsements).

This matters for competition because misleading advertising can give a business an unfair advantage and distort customer decision-making.

Common risk areas include:

• price representations (e.g. fake “was/now” discounts, drip pricing, hidden fees);
• performance claims (e.g. “guaranteed results”, “clinically proven” without evidence);
• comparative advertising (e.g. “better than Brand X” without a fair basis); and
• online reviews and testimonials (e.g. incentivised reviews that aren’t disclosed).

If you do want to compare yourself to competitors, the safest approach is to stick to claims you can substantiate and present them in a way that’s clear and not likely to mislead.

The Consumer Guarantees Act 1993: Minimum Standards For Customer Confidence

The Consumer Guarantees Act gives consumers automatic guarantees for many goods and services (like acceptable quality, fitness for purpose, and reasonable care and skill).

From a competition perspective, this helps by preventing a “race to the bottom” where businesses cut quality below acceptable standards just to underprice competitors.

Important: you generally can’t contract out of the Consumer Guarantees Act for consumer customers. If you sell to other businesses, contracting out may be possible in some circumstances, but it needs to be done properly and clearly.

This is a good example of why having properly drafted customer terms matters - a generic template can leave you exposed or accidentally promise more than you intend. Solid Terms & Conditions can help you compete confidently while managing risk.

What Business Practices Commonly Raise Competition Issues?

You don’t need to be a monopoly or a multinational to run into competition law problems.

Here are some of the most common “everyday” scenarios where businesses should slow down and check the rules before pushing ahead.

Setting Prices: What You Can And Can’t Coordinate

In most cases, you’re free to set your own pricing strategy - including discounts, bundles, limited-time offers, loyalty deals, and premium pricing.

The red flags start when pricing becomes coordinated between competitors, or when a supplier tries to control downstream pricing in a way the law doesn’t allow.

Two practical points many growing businesses run into:

• Recommended retail pricing: suppliers can often publish guidance, but retailers still need freedom to set their own prices. If you’re dealing with “recommended” or “minimum” resale pricing, it’s worth understanding the difference - especially if there’s pressure behind it. This is where recommended retail price issues often come up.
• Don’t copy competitor pricing through “agreements”: it’s normal to observe the market, but agreeing with a competitor to keep prices aligned is a different thing entirely.

Exclusive Dealing And “Locking In” Customers Or Suppliers

Exclusive arrangements can be commercially sensible - for example, you might invest heavily in a distributor and want certainty they won’t also stock a direct competitor.

But exclusivity can also harm competition if it substantially reduces the ability of other businesses to compete (especially in smaller markets).

Examples include:

• requiring a customer to buy only from you;
• requiring a supplier not to supply your competitors;
• offering special pricing only if the other party agrees not to deal with your competitors; or
• bundling products in a way that effectively forces customers to buy something they don’t want.

Because the details matter a lot, it helps to understand the concept of exclusive dealing before you build it into contracts or sales scripts.

Predatory Pricing And Aggressive Discounting

Discounting is normal. Launch offers are normal. Trying to win customers is normal.

The concern is when pricing strategies are designed to damage competition rather than compete fairly - for example, pricing below cost for long enough to drive competitors out, then raising prices once there’s less choice in the market.

This type of conduct is complex and depends heavily on market context (including market power, barriers to entry, and intent), but it’s still worth being aware of. If your strategy involves sustained “loss-leading” with the goal of removing rivals, you should get advice. The concept is commonly discussed as predatory pricing.

Online Claims, Reviews, And Reputation Wars

In modern markets, a lot of competition happens online - through SEO, ads, influencer marketing, testimonials, and comparisons.

Healthy competition still has rules. Problems arise when a business tries to win by:

• making inaccurate “best in NZ” style claims without support;
• posting fake negative reviews about competitors (or fake positive reviews for itself);
• using competitor brand names in a way that confuses customers; or
• misleading customers about availability, urgency, or “limited stock”.

If your marketing plan is aggressive (especially in a crowded market), it’s worth checking you’re not drifting into unfair business practices that could attract complaints or enforcement action.

How Can You Build A “Competition-Safe” Business From Day One?

A lot of competition compliance is about having good habits and good documents early - before your business is under pressure, growing fast, or dealing with disputes.

Below are practical steps that can help you compete hard while still competing fairly.

1) Train Your Team On What Not To Discuss With Competitors

Even if you personally understand cartel risk, issues often happen through:

• sales staff chatting with “friendly rivals”;
• contractors who work across multiple competitors;
• industry association meetings; and
• informal messages like “let’s keep prices stable this quarter”.

Set clear internal guidance about competitor communications, especially around pricing, bidding/tendering, customer allocation, and supplier terms.

2) Put Your Key Commercial Terms In Writing

Competition issues often overlap with contract disputes. If your agreements are vague, your team may “fill in the gaps” on the fly, and that’s when risky promises or pressure tactics can creep in.

Depending on your business model, this might include:

• customer terms (online or offline);
• supply agreements and distributor arrangements;
• commission or referral agreements; and
• subscription and auto-renewal terms.

It also helps to ensure you understand what makes obligations enforceable in the first place - a surprising number of disputes turn on whether there was actually a binding agreement. If you’re tightening your sales process, it’s useful to know what makes a contract legally binding.

3) Be Careful With Exclusivity, “Most Favoured Nation” Clauses, And Bundling

These features can be legitimate, but they can also create competition risk depending on:

• your market share and bargaining power;
• how long the exclusivity lasts;
• whether there are realistic alternative suppliers or routes to market; and
• whether the arrangement blocks competitors from reaching customers.

If you’re offering exclusivity because you’re investing in marketing, equipment, or training for the other party, document that reasoning clearly and ensure the scope is no broader than needed.

4) Keep Your Advertising “Proof-Ready”

A good rule is: if you couldn’t comfortably prove a claim to a regulator (or to a reasonably sceptical customer), rewrite it.

That includes:

• before/after results (especially in health, fitness, or beauty industries);
• price comparison claims (“cheaper than anyone else”);
• environmental claims (“eco-friendly”, “carbon neutral”); and
• testimonials (ensure they’re genuine and not misleading).

This isn’t about making your marketing bland. It’s about making it defensible, so you can compete confidently without worrying that a competitor or customer will challenge your claims.

5) Get Advice Early If You’re Scaling Fast Or Buying Competitors

Competition law risk tends to increase when you:

• move from a small player to a dominant niche provider;
• roll out national exclusivity arrangements;
• combine with a competitor (merger or acquisition); or
• become a key “gatekeeper” in distribution or platforms.

At that stage, it’s not just “legal compliance” - it’s strategic risk management. Getting advice early helps you structure deals and contracts in a way that supports growth without triggering avoidable problems.

Key Takeaways

• New Zealand competition law is mainly governed by the Commerce Act 1986, which targets conduct that substantially lessens competition, including cartel behaviour and anti-competitive agreements.
• The Commerce Commission enforces competition rules, and issues can arise from everyday commercial decisions, not just “big corporate” behaviour.
• Consumer laws encourage competition by ensuring customers can trust advertising and minimum product/service standards, particularly through the Fair Trading Act 1986 and Consumer Guarantees Act 1993.
• Be cautious with pricing discussions and resale price pressure, especially where it could look like coordination between competitors or improper control of downstream prices.
• Exclusivity, bundling, and aggressive discounting can create competition risk depending on market context, duration, and impact on other businesses’ ability to compete.
• Strong contracts and clear commercial terms reduce risk, because they keep expectations consistent and help your team avoid risky “informal” promises or tactics.
• If you’re unsure, get tailored advice early - competition and fair trading issues are often much easier to prevent than to fix after a complaint.

If you’d like help reviewing your contracts, advertising claims, distribution terms, or growth strategy so you’re protected from day one, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.