When Can You Change Prices In A Customer Contract?

Raising your prices can feel awkward, even when the numbers clearly say you need to. Your rent has gone up, supplier costs have shifted, wages are higher, or the service has simply become more valuable than when you first priced it.

The legal question is usually simple to ask but trickier to answer: can you increase prices for customers who have already signed up?

The answer depends on what your contract says, whether your customer is another business or a consumer, and how fair and clear your price change process is. A well-drafted price variation clause can give your business room to move without damaging trust or breaching your agreement.

Can You Change Prices In A Contract In The UK?

Yes, you can change prices in a UK contract if the contract allows it, the customer agrees to it, or the contract has ended and you're offering new terms.

If your customer has already accepted a fixed price for a fixed period, you usually can't just increase it halfway through because your costs have gone up. Doing that without a legal basis could be a breach of contract, which may let the customer refuse the increase, terminate, or claim losses if they can prove them.

There are three common ways price changes happen legally:

• Your contract has a price variation clause: This gives you a right to change prices in certain situations, if you follow the process in the clause.
• You and the customer agree to the change: This can be done through a written variation, signed order form, updated statement of work, email acceptance, or another method your contract allows.
• The existing contract period has ended: You can offer renewal on new pricing, provided you communicate the change clearly and don't mislead the customer.

If none of these apply, you may need to wait until the next renewal, re-contract with the customer, or negotiate a specific variation.

Say Maya runs a UK cleaning business that has a 12-month contract with a commercial office client. The contract says cleaning is £1,500 plus VAT per month for the full term, with no price review wording. Halfway through the year, Maya's staffing and materials costs jump. She can ask the client to agree to a higher rate, but she probably can't impose it unilaterally for the remaining months.

If Maya's contract had said prices could be reviewed every 6 months with 30 days' written notice, and the client could terminate if the increase was above 5%, she would have a much stronger position.

What Is A Price Variation Clause?

A price variation clause is a contract term that explains when and how your business can change the price after the customer has signed up.

It can be used in many types of customer contracts, including:

• business terms and conditions
• service agreements
• subscription terms
• software as a service terms or IT services agreement
• supply agreements
• maintenance contracts
• membership terms
• framework agreements with separate order forms

A good clause doesn't just say, we can change prices whenever we want. That kind of wording might look flexible, but it can create real problems, especially if you're dealing with consumers or small business customers on standard terms.

A practical price variation clause usually covers:

• When you can increase prices: For example, annually, at renewal, when scope changes, or when supplier costs rise.
• How you calculate the increase: For example, a fixed percentage, an inflation index, or a pass-through of specific third-party costs.
• How much notice you'll give: For example, 30, 60 or 90 days, depending on the contract and customer relationship.
• Whether the customer can cancel: This is especially important for consumer contracts and large increases.
• How notice is given: For example, by email to the billing contact, account dashboard notice, or written notice under the contract.
• What happens if the customer keeps using the service: For example, continued use after the notice period may mean acceptance, if that approach is fair and clearly stated.

Templates often miss the commercial detail here. The clause works best when it matches how your business actually bills, renews and communicates with customers.

Is A Price Increase Clause Different For B2B And Consumer Contracts?

Yes, price increase clauses are treated differently in B2B and consumer contracts because consumer law gives individuals extra protection against unfair terms.

B2B Customer Contracts

If your customer is another business, the starting point is freedom of contract. The courts will usually expect commercial parties to live with the deal they've made, especially where both sides had a chance to review the terms.

That said, you still need to be careful. In B2B contracts, a price increase clause should be clear enough that both sides understand:

• what costs or events can trigger an increase
• whether the increase is capped
• when the new price starts
• how the customer will be notified
• whether the customer can reject the change or terminate

If your terms are standard form terms, heavy one-sided wording can still be challenged in some contexts, especially where it connects with liability, cancellation rights or other restrictive terms. The Unfair Contract Terms Act 1977 can also affect certain business terms, although it's usually more relevant to exclusions and limits of liability than ordinary price-setting.

Even where a clause is legally enforceable, there's also the relationship question. A surprise 25% increase buried in an invoice can damage customer trust and lead to disputes or non-payment. Clear notice is often your best commercial protection.

Consumer Customer Contracts

If your customer is an individual buying outside their trade, business, craft or profession, the Consumer Rights Act 2015 is central.

Consumer terms must be fair and transparent. A term can be unfair if it creates a significant imbalance between your business and the consumer, to the consumer's detriment, contrary to good faith.

For price variation clauses, the risk is highest where your business can increase the price after the consumer is locked in, but the consumer can't cancel or avoid the increase.

A consumer price increase clause is more likely to be fair where:

• the clause is written in plain English
• the customer sees it before signing up
• the reason for the increase is clear
• the method of calculating the increase is understandable
• the customer gets reasonable notice
• the customer can cancel without penalty if the increase is more than minor or expected

The Competition and Markets Authority can take action against unfair consumer terms, and an unfair term may not be binding on the consumer. In plain English, you might not be able to rely on the price increase even if it's written in your terms.

How Much Notice Do You Need To Give Before Increasing Prices?

There isn't one notice period that applies to every UK customer contract, so the right notice period depends on your contract, customer type, billing cycle and the size of the increase.

Start with your contract. If it says you must give 30 days' written notice, give at least 30 days. If it says notice must be sent to a particular email address or through a particular process, follow that process closely.

If your contract doesn't specify a notice period, you need to be reasonable and practical. For many small business contracts, common notice periods are:

• 30 days: Often used for monthly rolling services, simple SaaS subscriptions and lower-value service contracts.
• 60 days: Useful where customers need time to budget, approve the change internally or compare alternatives.
• 90 days: Often more appropriate for larger contracts, annual budgets, complex services or material increases.

These aren't universal legal rules. They're commercial benchmarks. The bigger the increase, the more dependent the customer is on your service, and the harder it's for them to switch, the more notice you should consider giving.

For consumers, reasonable notice matters even more. If you increase prices in a way that surprises the customer or gives them no real choice, the term is more likely to be challenged as unfair under the Consumer Rights Act 2015.

Your price increase notice should usually include:

• the current price
• the new price
• when the new price starts
• why the price is changing, if that helps explain it
• what part of the contract allows the change
• what the customer needs to do if they accept
• whether the customer can cancel, and how
• the deadline for cancelling before the new price applies

Keep a record of the notice. If a customer later says they were never told, you'll want evidence of what was sent, when it was sent and to whom.

Can You Increase Prices At Subscription Renewal?

Yes, you can usually increase prices at subscription renewal if the customer is clearly told before the renewal and has a fair chance to decide whether to continue.

Renewals are often the cleanest time to change pricing because the original deal is ending and you're offering a new period on new terms. The key isn't to let the customer renew automatically without properly flagging the new price.

For B2B subscriptions, your terms should say:

• whether the subscription renews automatically
• how long each renewal term lasts
• when prices can change
• how much notice you'll give before a renewal price change
• how the customer can opt out of renewal

For consumer subscriptions, be especially careful with auto-renewals. The Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 require certain pre-contract information for distance and online sales, and the Consumer Rights Act 2015 requires fair and transparent terms.

The Digital Markets, Competition and Consumers Act 2024 also introduces new rules for subscription contracts, including requirements around pre-contract information, reminder notices and easier cancellation. The detailed timing and requirements should be checked against the current rules when you're updating your terms, because subscription regulation is an active area.

As a practical approach, if you're increasing prices at renewal:

• tell customers before the renewal date
• put the new price in the notice, not just a link to updated terms
• make cancellation or non-renewal steps easy to find
• avoid pre-ticked boxes or confusing opt-out processes
• keep proof of the renewal reminder and price notice

If your subscription is monthly and cancel-anytime, you may have more flexibility than a 12-month locked-in consumer contract. Even then, the change should be clear and not hidden in small print.

Can You Use An Inflation Clause To Raise Prices?

Yes, you can use an inflation clause, and it can be a sensible way to avoid renegotiating every time costs rise.

An inflation clause links price increases to an objective measure, such as the Consumer Prices Index. Some older contracts use the Retail Prices Index, but you should choose the index deliberately and make sure it fits your business.

The benefit of an inflation clause is that it feels less arbitrary. Instead of saying, we can increase our fees whenever we want, the contract gives both sides a formula.

A good inflation clause should cover:

• The index: For example, Consumer Prices Index, and whether it includes owner occupiers' housing costs.
• The reference period: For example, the annual percentage increase published for a particular month.
• The review date: For example, each anniversary of the contract start date.
• Caps and floors: For example, increases are capped at 5% per year, or prices won't decrease below the starting price.
• Rounding: For example, rounded to the nearest pound.
• What happens if the index is discontinued: For example, using a replacement index published by the Office for National Statistics.

For consumers, an inflation clause still needs to be transparent and fair. If the customer can't understand how the increase works, or if the increase is uncapped and they can't cancel, you may still have unfair terms risk.

Inflation clauses also need to match your sales messaging. If your website says fixed price for 12 months, but your terms allow a mid-term inflation rise, that conflict can create consumer law and advertising issues.

What Should You Do Before You Raise Existing Customer Prices?

You should review your contract first, then decide whether you're relying on an existing clause, seeking customer agreement, or changing prices only at renewal.

A careful process doesn't have to be complicated. It just reduces the risk of unpaid invoices, complaints and messy customer conversations.

Step 1: Check The Contract Version

Make sure you're looking at the contract the customer actually accepted. This might be an old set of terms, a signed proposal, a platform click-through, or a special negotiated agreement.

Watch for clauses about:

• prices and fees
• variation of terms
• notice requirements
• renewal and cancellation
• minimum terms
• order forms or statements of work
• entire agreement wording

If the contract has a no oral modification clause, casual emails or phone calls may not be enough to vary the agreement. You may need a formal written variation or deed of variation signed or accepted in the way the contract requires.

Step 2: Work Out Whether The Customer Is B2B Or Consumer

Don't assume every customer is treated the same. A sole trader buying your software for personal use may be a consumer, while a limited company buying the same software for its team is usually a business customer.

If you have both business and consumer customers, you may need separate pricing terms or a clause drafted to meet the stricter consumer standard.

Step 3: Decide The Best Legal Route

Your route will usually be one of these:

• Use the existing price variation clause: Follow the timing, notice and calculation process exactly.
• Ask for agreement: Send a clear written variation and don't charge the new price until accepted.
• Change pricing at renewal: Give notice before renewal and let the customer decide whether to continue.
• Update pricing for new customers only: Keep existing customers on current pricing until their contract allows a change.

Step 4: Communicate Clearly

Your notice should be direct, friendly and specific. Customers are more likely to accept a price rise if they understand what is changing and when.

A simple notice structure is:

• thank the customer for working with you
• state the new price and start date
• briefly explain the reason, if appropriate
• refer to the relevant contract clause or renewal date
• explain any cancellation or opt-out right
• give a contact point for questions

Avoid vague wording like pricing may be updated from time to time if the customer needs to know exactly what they'll pay.

Common Mistakes To Avoid

The biggest mistake is assuming that because your costs have increased, your customer has to accept a higher price. The contract still matters.

Other common issues include:

• Changing prices without checking the signed terms: You may be relying on a clause that isn't actually in that customer's contract.
• Giving notice in the wrong way: If the contract requires notice by email to a nominated address, an invoice note may not be enough.
• Using one-sided consumer wording: A broad right to increase prices with no cancellation right can be unfair.
• Hiding the increase: Customers shouldn't need to compare invoices line by line to discover the change.
• Forgetting VAT presentation: Consumer prices should generally be shown inclusive of VAT, while B2B quotes often state whether VAT is included or added.
• Mixing up scope changes and price rises: If the customer asks for extra services, document the extra scope and fee in a service agreement rather than relying on a general price rise clause.
• Updating website terms only: Changing your online terms may not automatically change existing signed contracts, especially for fixed-term agreements.

Good pricing terms protect both sides. They help your business keep up with real costs while giving customers enough clarity to budget and make informed decisions.

Key Takeaways

• You can usually raise prices only if the contract allows it, the customer agrees, or you're offering renewal on new terms.
• A strong price variation clause should explain when prices can change, how the increase is calculated, how much notice you'll give and whether the customer can cancel.
• B2B contracts give you more flexibility, but clear notice and a fair process still reduce disputes and unpaid invoices.
• Consumer contracts carry extra unfair terms risk under the Consumer Rights Act 2015, especially if customers are locked in without a cancellation right.
• Subscription renewals and inflation clauses can work well, but they need careful drafting and clear customer communication.
• Before increasing existing customer prices, check the accepted contract version and follow the notice process exactly.

If you'd like help with your customer terms, price variation clauses, subscription renewal wording or contract notices, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.