JCT Payment Applications in Fit-Out: What Your PM Needs to Know

I have watched good contractors lose tens of thousands of pounds. Not because they did bad work, but because they did not record it correctly.

That sentence is drawn from a pattern I have seen across many projects over twenty years. A subcontractor sends people to site every day for three weeks dealing with a situation caused by the employer's late design information. They do the work. The work is good. The project moves forward. And then, at final account, they cannot recover the cost, because they never gave notice. They never kept the records. They never submitted a formal application for loss and expense.

They assumed that because the employer knew about the situation, the money would follow automatically. It does not work that way. Not under JCT. Not under any standard form of contract. The contract has mechanisms. Those mechanisms have procedures. Those procedures have deadlines. If you do not follow them, your entitlement may be extinguished regardless of how justified your claim is.

This article covers the JCT payment mechanism: what it actually says, what the key dates are, and what most site PMs miss. It focuses on JCT Design and Build 2016, the most widely used edition in UK fit-out at the time of writing. Where JCT DB 2024 differs materially, this is noted.

Why the PM Needs to Understand This - Not Just the QS

The PM is not the QS and is not running the commercial account. But the PM is often the person who knows the project best, who attends the client meetings, and who is copied on the correspondence. The PM needs to understand the payment mechanism for three reasons:

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  So you know what your QS is working to and can help protect the commercial position.

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  So you can recognise when a Pay Less Notice has arrived and understand the implications.

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  So you understand why the variation records, contemporaneous records, and site notes that this article covers are so important: they are the substance behind the payment application. The mechanism is the frame. The records are what goes inside.

The HGCRA Foundation

The JCT payment mechanism is built on the Housing Grants, Construction and Regeneration Act 1996, as amended by the Local Democracy, Economic Development and Construction Act 2009. This legislation, which applies to virtually all UK construction contracts, gives contractors a statutory right to interim payments, requires contracts to include payment notice and pay less notice provisions, and gives parties a right to refer disputes to adjudication at any time.

You cannot contract out of the HGCRA. If your contract does not comply with it, the Scheme for Construction Contracts applies in its place. In practice, JCT DB 2016 and 2024 are drafted to comply with the HGCRA. Understanding the underlying legislation helps you understand why the mechanism works the way it does, and why the deadlines are not negotiable.

The Key Dates Under JCT DB 2016

The payment mechanism works around a cycle of dates. The Contract Particulars will specify the Interim Valuation Dates, typically monthly intervals from the date of possession.

Working through a practical example: if your Interim Valuation Date (IVD) is the 25th of each month:

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  You submit your payment application on or before the IVD - 25 October.

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  The Due Date is 1 November - 7 days after the IVD.

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  The Employer must serve a Payment Notice by 6 November - 5 days after the Due Date - specifying their valuation.

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  If no Payment Notice is served by Day 5: your application becomes the Notified Sum - the full amount you applied for becomes due.

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  The Final Date for Payment is 15 November - 14 days after the Due Date.

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  The Employer must serve any Pay Less Notice by 10 November - 5 days before the Final Date for Payment.

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  Payment must be made on or before 15 November.

This sequence is not negotiable and it is not approximate. The Contract Particulars may specify different periods from the defaults above. Read your specific contract. If there are Schedules of Amendments, read them carefully before assuming the standard periods apply.

The Notified Sum - The Concept That Changes Everything

The Notified Sum is the amount the Employer is obliged to pay on the Final Date for Payment. It is established by the Payment Notice (if the Employer serves one) or, if they do not, by your payment application. It can then be reduced only by a valid Pay Less Notice.

In the absence of a valid Pay Less Notice, the Notified Sum must be paid in full, regardless of what the Employer thinks the project is worth at that point, regardless of any ongoing commercial dispute, regardless of whether there are defects being argued about.

This is sometimes called the smash and grab mechanism. If the Employer fails to serve a Payment Notice by Day 5 and also fails to serve a Pay Less Notice by the deadline, they must pay the full amount applied for on the Final Date for Payment. This is not a technicality invented by contractors' lawyers. It is the statutory framework that Parliament put in place specifically because late payment was destroying small contractors.

Building a Watertight Payment Application

A payment application is a formal contractual document. It is not an invoice, not a progress report, and not a summary of what you think you deserve. It is a detailed, substantiated claim for the value of work carried out, structured in a way that gives the Employer what the contract requires to assess it.

A JCT DB interim payment application should address each of the following:

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  Preliminaries, valued on a time-related and fixed basis against your prelim schedule.

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  Measured works, valued trade by trade against the Contract Sum Analysis or Schedule of Works rates, supported by site progress records showing percentage complete per trade.

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  Variations, listed separately, each with a reference number, brief description, and value. Only variations instructed under the contract should be included.

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  Loss and expense, if applicable: a separate head of claim with its own reference and supporting documentation.

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  Retention: the full value of work before retention, the deduction, and the net sum claimed.

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  Materials on site: only if delivered, protected, and listed.

The application should be consistent in format from month to month. Submit in PDF with supporting attachments clearly referenced. If submitting via email, keep the timed sent copy.

The Variation Problem - and Why It Starts Before Practical Completion

Variations that are not captured in writing the day they are instructed are variations that may not be recoverable at final account. The most common pattern: a verbal instruction is given on site by the Employer's Representative, the work is done, and at final account six months later neither party can agree on the details, the value, or sometimes even whether the instruction was given.

The contract requires written instructions. Under JCT DB, you can request written confirmation of a verbal instruction. If the Employer does not contradict your written request within a reasonable time, the instruction is treated as confirmed. Use this mechanism. Every verbal instruction should be followed by a written record the same day.

I have seen a final account meeting where the Employer's QS reduced the variation account by over £30,000 because the variations were not supported by written instructions. The work had been done. Nobody had written it down.

What This Means in Fit-Out Specifically

Fit-out projects in London often involve occupied buildings, live operations, and clients who are under their own business pressures. Instructions change. Scope is added and removed. Client decisions arrive late and affect the programme. All of this has a commercial consequence, but only if it is captured correctly at the time.

The fit-out PM who understands the JCT payment mechanism is the PM who knows the Interim Valuation Date and works backwards to prepare applications on time, tracks all variations as they arise, alerts the QS immediately when a Pay Less Notice arrives, understands that a client's verbal agreement to pay is not the same as an instruction under the contract, and keeps contemporaneous records on everything that could become a claim.

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