Understanding Anti-Competitive Agreements: What UK Businesses Need To Know

Building a successful business in the UK is an exciting challenge, but it comes with plenty of responsibilities-including some you might not expect at first. One area that regularly trips up new and growing businesses is competition law, especially the rules around anti-competitive agreements. You’ve probably heard about big companies getting in trouble for “price fixing” or “market sharing,” but did you know that even small businesses can fall foul of these rules?

If you’re running a startup, launching a side hustle, or scaling up your business, it’s crucial to understand what counts as an anti-competitive agreement, why they matter, and how to make sure your business is protected from day one. Keep reading to break down the essentials and learn how to navigate these rules with confidence.

What Is An Anti-Competitive Agreement?

Let’s start with the basics. An anti-competitive agreement is any arrangement between two or more businesses that restricts competition in a market. This can be an obvious, formal contract, but it doesn’t have to be in writing-even verbal agreements and informal conversations can break the rules.

Common examples include:

• Fixing prices with your competitors (e.g., agreeing not to undercut each other)
• Dividing up customers or territories (“we’ll take London, you take Manchester”)
• Agreeing to limit production or supply (“let’s both cut output so prices go up”)
• Colluding on bids or tenders (bid-rigging)
• Setting unfair trading terms that lock customers into your products or services

Sometimes, these can be obvious; other times, they’re less clear-cut. Even sharing certain sensitive information with a competitor can risk an anti-competitive arrangement.

In the UK, the main law you need to know is the Competition Act 1998. This Act sets out rules against agreements that “prevent, restrict or distort” competition. It’s enforced by the Competition and Markets Authority (CMA), which has wide-ranging powers-including the ability to investigate, fine, and publicly name businesses that break the law.

Why Do Anti-Competitive Agreements Matter For Small Businesses?

You might be thinking, “But I’m just starting out-surely these laws only apply to big corporations?” Not so! The Competition Act applies to all UK businesses, regardless of size or sector. In fact, smaller firms are often targeted in investigations and can face heavy fines, damaged reputations, and loss of trust.

Getting it wrong exposes you to a host of risks, including:

• Fines: The CMA can issue penalties of up to 10% of your global turnover-enough to devastate most small businesses.
• Personal liability: Company directors and managers can sometimes be prosecuted, fined, or even disqualified from running a business.
• Lawsuits: Competitors (or customers) who lose out because of an anti-competitive agreement can sue for damages.
• Reputational harm: Trust takes years to build but seconds to lose, especially if your name ends up in the headlines for the wrong reasons.

Importantly, you don’t need to intend to break the law-simply being involved in an anti-competitive arrangement, even passively, can put you at risk.

What Types Of Agreements Are Banned Under UK Law?

The Competition Act 1998 bans a broad range of “agreements, decisions, and concerted practices” that restrict competition. Here are the key types to watch out for:

1. Price Fixing

This happens when businesses agree-formally or informally-to set prices, discounts, surcharges, or other costs, rather than letting the market decide. This is always illegal, no matter how you “dress it up.”

2. Market Sharing

If you agree with a competitor to split the market by territory, customers, or product type, you’re in breach. Even informal understandings (“You serve those clients, we’ll serve ours”) can be caught.

3. Limiting Production Or Supply

Keeping output low to artificially raise prices or control market share is another clear violation. This includes agreeing to slow down manufacturing, limit delivery or “ration” goods.

4. Collusive Tendering (Bid Rigging)

This involves secretly coordinating with competitors to fix the outcome of bids-for example, agreeing in advance who will “win” a tender, with others submitting purposely high or fake bids.

5. Sharing Sensitive Information

Even swapping confidential details on prices, customers, wages, or strategy with a competitor (outside of a legitimate joint venture) can risk investigation as a “concerted practice.”

In practice, there are plenty of grey areas. Vertical agreements (between suppliers and retailers, for example) can also get businesses in trouble if they set fixed or minimum prices, or restrict cross-border selling in the UK. The CMA also pays close attention to so-called “gentlemen’s agreements” and informal chats at trade shows, so take care what you say and share.

Are Any Agreements Allowed?

Some joint activities are perfectly legitimate-so how do you know what’s safe? In the UK, certain agreements may be allowed if they deliver benefits to consumers (such as lower prices, higher quality, or better choice) and if the restrictions are strictly necessary and proportionate to achieve those goals.

For example:

• Joint buying by small businesses to get a better deal from suppliers (if it leads to lower prices for customers)
• Genuine collaborations or R&D arrangements that promote innovation
• Licensing arrangements for intellectual property, provided they don’t go beyond what’s necessary

If you think your agreement has a pro-competitive purpose, you must be able to provide clear evidence of consumer benefits, and ensure there are no less-restrictive alternatives. It’s always worth getting legal advice before entering these types of arrangements.

How Can I Make Sure My Business Is Compliant?

The good news is that steering clear of anti-competitive agreements doesn’t have to be complicated. You just need the right systems and awareness in place. Here’s how to get started:

• Train your team-Make sure everyone (from sales to management) understands what’s allowed and what’s not. Simple policies and regular reminders go a long way.
• Watch your communications-Take care with emails, messages, and anything written in meetings, especially with competitors. Even offhand remarks can end up as evidence.
• Avoid informal ‘chats’ or understandings-If you’re at an industry event or meeting a competitor, make sure you don’t discuss prices, customers, or strategy.
• Check your contracts and terms-Review existing agreements with suppliers, distributors or partners for any clauses that could restrict competition (like exclusivity or minimum resale prices).
• Get contracts professionally reviewed-Homemade templates or copy-paste contracts might contain banned terms. Have your contracts reviewed by a legal expert to stay on the safe side.

If you’re not sure-ask! When in doubt, having an expert check things over is always the safest option.

What Should I Do If I’m Worried About An Anti-Competitive Agreement?

If you think you’ve been involved in (or witnessed) an anti-competitive agreement, don’t panic-but do act quickly. Here are some steps you can take:

• Stop the conduct-Cease any discussions or activity that might be problematic as soon as possible.
• Document your actions-Keep a clear record of the steps you’ve taken and conversations you’ve had.
• Seek legal advice straight away-The best defence is a prompt response. A lawyer can help you assess the risks, approach regulators if needed, and protect your business going forward.
• Consider leniency applications-The CMA sometimes offers reduced fines or immunity if you report an anti-competitive agreement and cooperate. Specialist advice is a must in these situations.

Above all, address the situation as soon as you spot it-waiting can make things worse and limit your options.

Can Terms In My Supply Or Franchise Contracts Be Anti-Competitive?

Absolutely-some of the biggest risks are hiding in the fine print. Even if you buy supplies, join a franchise, or run a business partnership, your contracts can sometimes cross the line into anti-competitive territory.

For example, supply or distributor contracts that:

• Prevent you from selling to certain customers or areas
• Require you to buy all your goods from one supplier (“exclusive dealing”)
• Impose fixed or minimum resale prices (“resale price maintenance”)

These clauses might seem standard, but if they unduly restrict your ability to compete, they could be unlawful in the UK, even if common in other countries. When considering franchise agreements, pay attention to rules around advertising, pricing, and customer territory.

If you’re buying a business or switching suppliers, reviewing these clauses is essential-not just for compliance, but to make sure your new venture isn’t hobbled from the start. A contract review can highlight risks before you sign.

How Are Anti-Competitive Agreements Investigated And Enforced?

The CMA is responsible for enforcing competition law in the UK, and it has various powers to detect, investigate, and penalise illegal agreements. Here’s what you can expect if your business ends up subject to review:

• Dawn raids-The CMA can visit your premises (often unannounced) to inspect documents, emails, and even seize computers or phones.
• Requests for information-Official requests for contracts, communications, meeting minutes, or explanations of your business practices.
• Employee interviews-Current or former staff may be interviewed or required to provide statements, sometimes under oath.
• Fines and sanctions-At the end of an investigation, the CMA can fine companies and individuals, seek legal undertakings to stop certain conduct, or start court proceedings for serious breaches.

Competition law breaches are sometimes found after a competitor, employee, or customer makes a complaint or “blows the whistle.” Occasional sector-wide “sweeps” or reviews also mean you could be checked out even if you’ve done nothing to attract attention.

This all sounds daunting, but knowing the process-and having clear, lawful agreements-means you’ll be ready if your business is ever approached.

What Legal Documents Should I Have To Avoid Anti-Competitive Risks?

Staying on the right side of competition law is much easier if you have the right documentation and processes in place. Key steps include:

• Clear, professional contracts-Your business agreements with suppliers, partners, and franchise networks should be up-to-date and reviewed for compliance with competition law.
• Competition law policy or handbook-Even a short employee guide explaining what can and can’t be discussed with competitors is invaluable.
• Proper training and compliance checks-Document your staff training sessions and any audits you carry out so you have a paper trail if questions arise.
• Privacy and confidentiality policies-If you share customer or commercial data with others, make sure everyone understands what is (and is not) appropriate to disclose.

Don’t rely on generic templates-they probably won’t cover the UK’s specific rules or your unique business circumstances. Investing in the right professional contract drafting from the start saves stress, time, and money as your business grows.

Key Takeaways

• Anti-competitive agreements are any arrangements between businesses that restrict competition-including price fixing, market sharing, limiting output, or exchanging sensitive information.
• The Competition Act 1998 applies to ALL UK businesses, not just big companies. Even informal or verbal agreements can breach the rules.
• Banned conduct includes price-fixing, dividing customers/markets, limiting supply, bid rigging, and some exclusive dealing and resale price maintenance clauses.
• Having professional contracts, clear training, and a practical compliance policy gives your business the best protection from enforcement and fines.
• If you think you’ve been involved in, or asked to join, an anti-competitive agreement, stop immediately and seek legal advice on next steps.
• Regular review of your contracts-especially supply, partnership, and franchise agreements-is essential to avoid hidden anti-competitive risks.

If you’d like guidance on reviewing your agreements or setting up compliance systems to ensure you’re not caught out by anti-competitive rules, you can reach us on 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat. Our team is here to help you build your business with confidence, knowing your legal foundations are rock solid from day one.