The UK’s construction industry relies on clear and structured payment processes to ensure that all parties in a contract are paid fairly and on time. A key part of this process is the use of payment notices and pay less notices, which dictate how much is due and whether any deductions will be made.
The Housing Grants, Construction and Regeneration Act 1996 (as amended): commonly referred to as the Construction Act, introduced strict requirements around payment notices, ensuring that payees receive transparent justifications for any reductions to their expected payments. However, failing to serve a valid pay less notice can have serious consequences for a payer, potentially requiring them to pay the full amount originally claimed.
Under the Housing Grants, Construction and Regeneration Act 1996 (as amended), a pay less notice allows a payer to pay less than a notified sum, provided it is served correctly and within the legal timeframe. The rules were later refined by the Local Democracy, Economic Development and Construction Act 2009 (LDEDCA), which strengthened payment procedures and clarified notice requirements under UK construction law.
For guidance on resolving disputes about payment notices or the validity of a pay less notice, see our Construction Adjudication page.
Below, we’ll explore what a pay less notice is, its legal requirements under the Construction Act, and how it should be correctly served. It will also cover the circumstances in which a pay less notice may be challenged and what happens if one is invalid.
Summary
This article covers:
- The purpose of payment notices and pay less notices under the Construction Act, and why serving them correctly matters.
- The legal framework, including section 111 of the Act and the Scheme for Construction Contracts, sets the seven-day rule.
- Key drafting and timing requirements, with guidance from leading cases such as Advance JV v Enisca and S&T v Grove.
- Common mistakes that make pay less notices invalid and how to avoid them.
- Practical steps to challenge or enforce a notice
Legal Framework: The Construction Act and the Scheme
The statutory rules for payment notices and pay less notices come from the Housing Grants, Construction and Regeneration Act 1996 (HGCRA), as amended by the Local Democracy, Economic Development and Construction Act 2009 (LDEDCA). Together, these Acts form the foundation of modern payment practices in UK construction contracts.
The Construction Act also gives both payers and payees a range of statutory rights designed to protect cash flow and ensure fairness across the supply chain. These include:
- Right to Payment Notices: The payer must provide a payment notice specifying the amount due and how it is calculated.
- Right to Issue a Pay Less Notice: If the payer intends to pay less than the notified sum, they must serve a valid pay less notice within the agreed timeframe.
- Right to a Clear Payment Process: The contract must include a clear payment schedule, including deadlines for issuing notices and making payments.
- Right to Suspend Work for Non-Payment: If payment is not made in accordance with the contract, the payee may have the right to suspend work.
- Right to Adjudication: Parties can refer payment disputes to adjudication, a fast-track dispute resolution process designed to enforce compliance with the Act.
A key provision is section 111 of the Construction Act, which requires the payer to pay the “notified sum” unless a valid pay less notice is served within the correct timeframe. The notified sum is the amount stated as due in a valid payment notice or default payment notice, meaning that if no pay less notice is issued, the payer must pay that full amount.
Where a contract fails to specify its own clear payment terms, the Scheme for Construction Contracts (England and Wales) Regulations 1998, as amended in 2011, automatically applies. Under the Scheme, a pay less notice must be served no later than seven days before the final date for payment.
These statutory frameworks ensure fairness and transparency in the construction payment process, helping to prevent disputes and protect cash flow across the supply chain.
What is a Pay Less Notice?
A pay less notice is a formal document served by a payer to notify a payee that they intend to pay less than the amount previously notified in a payment application or notice. It is a legal mechanism under the Housing Grants, Construction and Regeneration Act 1996 (HGCRA), commonly known as the Construction Act, that ensures transparency when deductions are made to payments in a construction contract.
Under section 111 of the Construction Act, a pay less notice allows a payer to pay less than the notified sum, the amount stated as due in a payment or default notice, provided it is served correctly and within the contractual or statutory timeframe.
A valid pay less notice must clearly state:
- The amount the payer intends to pay
- The basis on which that amount is calculated
- The reason for withholding part of the payment (if applicable)
For example, if a subcontractor applies for £50,000 but the main contractor considers that only £40,000 is due, a pay less notice must clearly explain the £10,000 deduction and how that figure has been determined.
Failure to serve a valid pay less notice within the required timeframe means the payer is legally obliged to pay the full notified sum, even if there is a dispute over the valuation or quality of the work.
Payment Notice vs Pay Less Notice: Key Differences
Many disputes arise in construction projects because parties confuse a payment notice with a pay less notice. Both serve different purposes under the Housing Grants, Construction and Regeneration Act 1996 (as amended).
The following table outlines the key differences between them:
| Aspect | Payment Notice | Pay Less Notice |
| Purpose | Confirms the amount due (the notified sum) for a payment cycle. | Reduces the amount previously notified, explaining why less will be paid. |
| Who Issues It | Usually, the payer or a contract administrator (but can be the payee if the payer fails to serve one). | Always the payer (or their representative). |
| Timing | Issued after the due date to confirm the amount payable. | Issued before the final date for payment if the payer intends to pay less. |
| Reference | Refers to the payment application or valuation submitted by the payee. | Refers to the notified sum stated in the payment notice or application. |
| Failure to Serve | The payee may issue a default payment notice instead. | The payer must pay the full notified sum, even if there is a dispute. |
In summary, a payment notice confirms what is due, while a pay less notice explains why less will be paid. Both must be served within strict timeframes to comply with the Construction Act.
Types of Payment Notices
Within the construction industry, several types of notices regulate payments. These include:
- Payment Notice: Issued by the payer, payee, or a contractually agreed third party to confirm the amount due.
- Default Payment Notice: Issued by the payee when the payer fails to issue a payment notice confirming the amount they believe is due.
- Pay Less Notice: Issued when the payer intends to pay less than the amount previously stated in a payment notice or application.
These notices form a sequence that governs payment in construction contracts. The usual order is:
- Payment Application (submitted by the payee)
- Payment Notice (issued by the payer)
- Default Payment Notice (if the payer fails to serve theirs)
- Pay Less Notice (if the payer intends to pay less than the notified sum)
The process and timing of these notices vary depending on the contract in place. Under most JCT contracts, the payer or contract administrator must issue the payment notice within a specified period after the due date, while under NEC contracts, the project manager or service manager issues a payment certificate at each assessment date. These differences determine when a pay less notice must be served and by whom.
Next, we’ll look at the correct process for serving a pay less notice, including the required form and content.
When and How to Serve a Pay Less Notice
A pay less notice must be served within the timeframe specified in the contract or, if the contract does not set a deadline, in accordance with the Construction Act. The notice must be issued before the final payment due date, allowing the payee a fair opportunity to respond or challenge it.
To ensure compliance, a valid pay less notice must:
- Be served within the specified timeframe before the final payment due date
- Clearly state the reduced amount the payer intends to pay
- Provide a calculation breakdown explaining how the amount has been determined
- Include the reason(s) for withholding payment if applicable
If a pay less notice is not served correctly or within the required timeframe, the payer must pay the full amount originally stated in the payment notice or payment application, regardless of any disputes. The timing for serving a pay less notice is set out in the contract. If the contract does not specify a deadline, the statutory Scheme for Construction Contracts applies, which requires the notice to be served no later than seven days before the final date for payment.
For example, if the final date for payment is Day 30, the latest pay less notice that can be served is Day 23 under the Scheme. Serving it even one day late makes the notice invalid, and the payer must then pay the full notified sum.
The method of service is equally important. A notice sent by email, project portal, or post must comply with the service provisions stated in the contract. If the contract requires proof of delivery, it is best practice to send the notice by recorded delivery or an acknowledged electronic system to avoid disputes about timing.
The exact timing rules vary slightly between standard forms of contract. Under most JCT contracts, the pay less notice must be served a set number of days before the final date for payment, while NEC contracts link notice periods to the assessment date in each payment cycle. Failing to follow these specific timeframes can render the notice invalid, regardless of intent.
If a pay less notice is served late or not at all, section 111 of the Construction Act requires the payer to pay the full notified sum, even if there is disagreement about the valuation or quality of the work. A non-compliant notice cannot later be corrected or relied upon in adjudication.
How to Draft a Valid Pay Less Notice
A well-drafted pay less notice must make it clear to the payee what is being paid and why. The courts have consistently emphasised clarity and precision in both the amount and the reasoning provided. For example, in Henia v Beck Interiors Ltd [2015] EWHC 2433 (TCC), the judge confirmed that a pay less notice must clearly set out the sum the payer considers due and the basis on which that sum has been calculated.
Practical takeaway: A pay less notice must be clear and precise. It must show both the amount the payer considers due and the basis for its calculation. Lack of clarity or incomplete explanation can make the notice invalid, regardless of intention.
To comply with the Construction Act, every pay less notice should be:
- Clear and Unambiguous: It must explicitly state the revised payment amount and the reasoning behind any deductions.
- In Writing: While some contracts may specify the required format, it is best practice to issue the notice in writing (email, letter, or electronic format) to ensure a record exists.
- Properly Referenced: It should refer to the contract under which it is being issued and provide relevant details such as the project name, invoice number, and payment reference.
- Served Following the Contract: The contract may set out specific methods of service (e.g., via recorded post, email, or online systems).
Example wording might include: “We intend to pay £[amount] in respect of your payment application dated [date], reflecting a deduction of £[amount] for [reason].”
A notice that lacks any of these elements may be considered invalid, leaving the payer liable for the full notified sum. For help reviewing or drafting compliant payment documentation, see our Construction Templates and Contract Drafting services.
Next, we’ll explore which types of work deductions can be applied and how case law influences pay less notices.
Paying Less for What Works (and Case Examples)
A pay less notice is not a tool for arbitrarily reducing payments; it must be justified and backed by contractual or legal reasoning. The amount deducted must correspond to the actual value of the work completed or to valid contractual deductions, such as defects, delays, or overpayments.
A payer may lawfully serve a pay less notice in cases where:
- Defective or Incomplete Work: If part of the work is not completed to the agreed standard, the payer may reduce the payment accordingly
- Delay-Related Deductions: Where there are provisions for liquidated damages due to late completion, the payer can withhold part of the payment
- Overpayment in Previous Applications: If a payee has been overpaid in a previous payment cycle, this may be corrected via a pay less notice
- Counterclaims or Set-Offs: If the employer or main contractor has valid counterclaims under the contract, these may justify a reduced payment
Recent case law has reinforced the importance of clarity and precision when issuing a pay less notice, particularly when multiple payment applications are involved. The decision in Advance JV v Enisca Limited highlights that a pay less notice must explicitly identify the payment application it refers to and cannot be assumed to apply to multiple applications unless this is made unambiguously clear.
In this case, Advance JV was the main contractor for a large utilities project and had subcontracted Enisca to carry out electrical works. Enisca submitted two separate payment applications: Application 24 and Application 25. Advance later issued a pay less notice in response to Application 25, but the notice mistakenly referred to “application number 17” before later mentioning “application No 25”. While both parties acknowledged that referencing Application 17 was a clerical error, a dispute arose over whether the notice covered both Application 24 and Application 25, as Advance claimed, or whether it only related to Application 25, as Enisca argued.
The court ruled in favour of Enisca, holding that each payment cycle is distinct, and a pay less notice must refer clearly to the specific payment application it is addressing. The court determined that the wording of the notice did not make it sufficiently clear that it was intended to dispute Application 24. Even if Advance had intended for the notice to apply to both applications, the lack of clarity made it ambiguous and, therefore, invalid in relation to Application 24. This meant that Advance remained liable for the full amount claimed in Application 24.
Practical takeaway: Each payment cycle is separate. A pay less notice must clearly identify the specific payment application it refers to. If there is any ambiguity, the court will interpret it in favour of the payee, and the payer may be required to pay the full amount claimed.
In reaching its decision, the court relied on the precedent set in Bexheat Limited v Essex Services Group Limited, which confirmed that each payment application constitutes a separate payment cycle under section 111 of the Construction Act. The ruling in Bexheat reinforced that a pay less notice is linked to a specific “notified sum” under the Construction Act. This means that unless a notice explicitly and unambiguously refers to multiple applications, it will only apply to the payment application it directly references. Any uncertainty will be interpreted in favour of the payee, potentially requiring the payer to settle the full amount of a disputed application.
Practical takeaway: A pay less notice is tied to one notified sum per payment cycle under section 111 of the Construction Act. It cannot be treated as covering multiple applications unless this is stated explicitly and unambiguously.
The courts have also considered the payer’s right to challenge the valuation itself in S&T (UK) Ltd v Grove Developments Ltd. That case clarified that while a payer must first pay the notified sum if no valid notice was served, they can later commence adjudication to determine the “true value” of the works. However, payment must be made before any such reassessment can take place, underscoring the strict procedural sequence established by the Act.
Practical takeaway: Even if a payer must first pay the notified sum because no valid notice was served, they can still later adjudicate on the “true value” of the works. However, payment must be made before any reassessment, emphasising that procedural compliance comes first.
Together, these cases highlight that precision and timing are critical when drafting and serving a pay less notice. A pay less notice must clearly identify the payment application it refers to and comply fully with the contractual or statutory time limits. Any ambiguity or delay will likely render it invalid, leaving the payer liable for the full amount even if they had legitimate grounds to dispute part of the sum.
Challenging a Pay Less Notice
If you receive a pay less notice that you believe is unjustified or incorrect, you have the right to challenge it. However, the approach you take will depend on the reasons for the dispute and the terms of the construction contract. There are several ways to contest a pay less notice, ranging from informal negotiation to formal legal proceedings.
1. Review the Validity of the Pay Less Notice
Before taking further action, it is essential to check whether the pay less notice meets the legal requirements under the Construction Act and the contract. Ask the following questions:
- Was the notice served within the correct timeframe? A pay less notice must be issued within the deadline set out in the contract. If it was late, it may be invalid.
- Does the notice specify the amount to be paid and how it was calculated? A vague or unclear notice may be challenged for failing to meet statutory requirements.
- Does the notice give a valid reason for withholding payment? If the payer has not provided a legitimate justification, the notice may not be enforceable.
- Is the notice linked to the correct payment application? As seen in Advance JV v Enisca Limited, a notice that fails to identify the right application could be deemed invalid.
If the pay less notice is found to be defective in any of these areas, the payee may have grounds to argue that it should be disregarded, meaning the full payment originally applied for must be made.
2. Raise an Informal Challenge with the Payer
The quickest and most cost-effective way to resolve a dispute over a pay less notice is through direct negotiation. If you believe the deduction is unfair or incorrect, you can:
- Request clarification from the payer about the reasoning behind the reduction.
- Provide evidence (such as site reports, contract clauses, or invoices) to demonstrate why the full amount should be paid.
- Propose a compromise if both parties are open to settling without escalating the dispute.
Often, disputes over pay less notices arise due to miscommunication or administrative errors. Engaging with the payer at an early stage may help avoid unnecessary legal action.
3. Refer the Dispute to Adjudication
If informal negotiations fail, the next step is to refer the dispute to adjudication. Under the Construction Act, all parties to a construction contract have the statutory right to adjudication, which provides a fast-track dispute resolution process.
To initiate adjudication, you will need to:
- Serve a Notice of Adjudication setting out the details of the dispute.
- Appoint an adjudicator, either through agreement with the payer or via a nominating body.
- Submit a Referral Notice with supporting evidence, such as valuation summaries, programmes, or site photos, to justify your claim.
The adjudicator usually issues a decision within 28 days of the referral, unless both parties agree to extend the period. If the adjudicator decides the pay less notice was invalid or that the full amount is due, the payer must comply with that decision immediately.
4. Consider Legal Action (Litigation or Arbitration)
If adjudication does not resolve the issue, or if one party refuses to comply with the adjudicator’s decision, the dispute may need to be escalated to litigation or arbitration.
- If the losing party fails to comply, the successful party can enforce the decision through the Technology and Construction Court (TCC), which normally gives summary judgment in straightforward cases.
- Arbitration: If the contract contains an arbitration clause, the parties may be required to resolve the dispute through an arbitrator instead of going to court.
Both litigation and arbitration can be time-consuming and expensive, so these options are generally considered a last resort. However, in high-value disputes, it may be necessary to enforce a fair payment outcome.
Whichever route you take, keeping accurate records of notices, correspondence, and valuations will strengthen your position if the matter proceeds to adjudication or court.
Common Mistakes and How to Avoid Them
Even experienced contractors and employers can make mistakes when issuing or responding to pay less notices. Most disputes arise not because of disagreement over valuation, but because one party failed to follow the procedural requirements of the Construction Act or their contract.
The most common mistakes include:
- Serving the notice too late: A pay less notice must be issued within the contractual or statutory period, typically at least seven days before the final date for payment under the Scheme. Late service automatically invalidates the notice.
- Using vague or incomplete wording: The notice must state the amount due and explain clearly how that amount was calculated. Generic statements such as “deductions applied” or “subject to review” are insufficient.
- Referring to the wrong payment application: Each payment cycle is separate, so a pay less notice must identify the correct payment application number or date. Cross-referencing multiple applications risks invalidity.
- Not following the contract’s service provisions: If the contract specifies how notices must be delivered (for example, by email, recorded post, or through an online portal), those rules must be followed exactly. Failure to do so can make the notice ineffective.
- Issuing the notice from the wrong party: Only the party authorised under the contract, such as the employer, contract administrator, or project manager, can issue a valid pay less notice.
- Failing to keep evidence of service: In any dispute, proof of when and how a notice was served is crucial. Retain delivery confirmations, email timestamps, or portal logs.
Avoiding these errors is the simplest way to prevent disputes and protect cash flow. If you are unsure whether your notice meets the statutory or contractual requirements, seek early legal advice before the payment deadline passes.
Practical Checklist: Serving a Valid Pay Less Notice
Getting the details right is critical when serving a pay less notice. The following checklist summarises the key steps to ensure compliance with both the Construction Act and your contract:
- Check Your Contract: Confirm who must issue the notice, the required method of service, and the number of days before payment that it must be served.
- Record Key Dates: Note the due date, final date for payment, and the latest date for serving the notice (or use seven days before payment if the Scheme applies).
- Calculate Accurately: State the sum due and explain exactly how it has been calculated, referencing any deductions or set-offs.
- Reference Correctly: Identify the payment application, project, and contract to which the notice relates.
- Use the Correct Method of Delivery: Serve the notice according to the contract (for example, recorded post, email, or project portal). Keep proof of delivery.
- Keep Records: Retain copies of all notices, applications, and correspondence for at least the duration of the project.
- Seek Advice Early: If in doubt, take legal advice before the payment deadline passes to avoid losing the right to rely on the notice.
Following these steps helps to avoid disputes and ensures that payment decisions are legally defensible if challenged.
How We Can Help
The pay less notice is a crucial mechanism in construction contracts, allowing payers to reduce payments lawfully when justified. However, strict rules govern its timing, content, and clarity, and failure to comply with these requirements can have significant financial consequences.
Navigating the complexities of payment notices and pay less notices requires a solid understanding of both contractual obligations and statutory requirements. At Witan Solicitors, we specialise in construction law, providing expert guidance on drafting valid pay less notices, challenging unfair deductions, and resolving payment disputes.
If you’re unsure whether your notice complies with the Construction Act or your contract terms, our construction lawyers can review and help you draft or challenge it; simply get in touch with Witan Solicitors today.
FAQ
The rules on pay less notices can be confusing, particularly where contract terms differ from the statutory Scheme. These quick answers address some of the most common questions that arise.
Does a pay less notice need to be signed?
No. The Construction Act does not require a signature. What matters is that the notice clearly sets out the amount the payer intends to pay, the basis of calculation, and that it is served correctly. However, some contracts may require notices to come from an authorised person, such as a contract administrator or project manager, so it is always worth checking.
Can a pay less notice be negative?
Yes. A negative pay less notice may be issued where deductions or set-offs exceed the amount claimed by the payee. This can occur if there has been overpayment on previous applications, defective work, or liquidated damages for delay. The payer must still explain how the negative figure was calculated.
Can a pay less notice be served one day before payment is due?
Usually not. Unless the contract expressly allows a shorter period, the statutory Scheme requires the notice to be served at least seven days before the final date for payment. Serving it any later will make it invalid.
Can parties agree to a different notice period?
Yes. The parties can set their own timeframes in the contract, provided they comply with the Construction Act’s requirements for clarity and fairness. In practice, most JCT and NEC contracts specify notice periods that mirror or exceed the seven-day rule to allow both sides adequate time to respond.
When is a pay less notice invalid?
A pay less notice may be invalid if:
- It is served late
- It is issued by the wrong party
- It fails to state the reduced payment amount and the basis of its calculation
- It is not in writing
- It fails to identify the correct payment application
If a notice is invalid, section 111 of the Construction Act requires the payer to pay the full notified sum.
