Start from the contract's payment trigger, then calculate the four dates that control when notices are served and money must arrive.
A valuation records what completed work is worth at a point in time. An assessment is the contract administrator's calculation of the amount due. A claim is the payee's written request for payment, stating the amount and how it was calculated. The payee receives the money; the payer pays it.
Construction payment dates are a chain, not a single deadline. The due date fixes when a sum is assessed as due. A payment notice states the sum and calculation. A pay less notice is the payer's last notice for reducing the notified sum, meaning the amount established by the applicable payment notice. The final date for payment is when the applicable sum must be paid.
Choose the closest starting template, enter the dates, then replace every interval with the wording in your signed contract.
The last day of the relevant period used by your payment cycle.
The date the payee gives a written claim stating the amount and basis.
The selected calculator template is highlighted. JCT and NEC4 are starting points only, because amendments and Contract Particulars, the project-specific entries completed in a standard contract, can change the intervals.
For a periodic payment, the due date is the later of seven days after the relevant period and the date the payee makes a written claim. The default final date is 17 days after due. If the contract does not specify the relevant period, the Scheme defines it as 28 days.
Payment notice: due + 5 days. Pay less: final date minus 7 days. Scheme Part II, paragraphs 4 and 8 to 10.
The official JCT explanation of SBC/Q 2016 uses an Interim Valuation Date (IVD), then due +7 days, final +14 days and pay less no later than five days before final.
Confirm the edition, contract form, IVD and any schedule of amendments, meaning a separate document that changes the standard wording. JCT interim payment guidance.
The October 2020 amendments for PSC, TSC and DBOC use the later of invoice receipt and assessment +14 days as due, with final +7 days unless Contract Data states another period.
NEC4 subcontracts and other NEC forms can use different periods. Read the exact Y(UK)2 clause and Contract Data. NEC Contracts Y(UK)2 explanation.
Use a known reference date and enter the due, payment notice, final payment and pay less intervals exactly as written in the signed contract.
If the mechanism is missing or non-compliant, only the relevant Scheme provisions may be implied.
Select any result above to highlight its meaning here.
This is when the payment becomes due under the contract. It is not necessarily the day cash must arrive. Section 110 requires an adequate mechanism for determining what becomes due and when.
Section 110A requires the contract to provide for a notice stating the sum considered due and the basis of calculation. The statutory longstop is no later than five days after the due date.
This notice states the lower sum the payer considers due and its calculation. It must be served within the contract's prescribed period, or seven days before final payment where the Scheme supplies the period.
Section 111 requires the notified sum to be paid by this date unless a valid pay less notice changes the applicable amount. If the payer fails to issue its required payment notice, section 110B lets the payee issue a replacement notice. When that replacement is given after its permitted date, the final date moves by the same number of days as the replacement notice was late.
This calculator is a diary aid, not legal advice or a decision that a notice is valid. Get contract-specific advice before withholding payment, suspending work or starting adjudication, the fast statutory dispute process available for construction contracts.
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