Enter one date and pick the contract. Get the due date, the payment notice deadline, the pay less notice deadline and the final date for payment, with UK bank holidays already taken out.
Dates take out UK bank holidays, as the Construction Act requires (s.116(3), which excludes Christmas Day, Good Friday and bank holidays). Weekends are counted. This is guidance on the standard positions, not advice on your contract: bespoke amendments change the periods, and the fields above let you set them.
A construction payment runs on a fixed sequence set by the Housing Grants, Construction and Regeneration Act 1996 and the contract. Each date is counted from the one before it, so getting the first one wrong moves all of them.
The date the payment becomes due. Under JCT it is seven days after the interim valuation date. Under NEC with Option Y(UK)2 it is seven days after the assessment date. Every deadline below is counted from here, not from the valuation date.
The payer, or the payer’s agent, must give a payment notice not later than five days after the due date, stating the sum considered due and the basis on which it is worked out (s.110A). Silence here is expensive: if no notice is given, the payee’s application can become the notified sum.
To pay less than the notified sum, the payer must serve a pay less notice, and it has to arrive before a prescribed deadline ahead of the final date for payment (s.111). Miss it and the notified sum is due in full, whatever the works are actually worth that month.
The last day the money can lawfully be paid. It is a set number of days after the due date, fourteen on the common JCT and NEC positions, seventeen under the Scheme, or whatever your contract states.
The Act counts time in the ordinary way, so weekends count as days. What it takes out are Christmas Day, Good Friday and days that are bank holidays under the Banking and Financial Dealings Act 1971. A calculator that removes weekends is counting the wrong thing, and a diary reminder that ignores a bank holiday can put a pay less notice a day out of time.
JCT counts from the interim valuation date. NEC counts from the assessment date. They are the same point in the sequence under a different name, and the due date sits seven days after either of them. The common mistake is to treat the NEC assessment date as if it were already the due date, which pulls every downstream deadline forward by about a week. This calculator uses the assessment date as the starting point, the same as a valuation date, so the timetable comes out right.
QScope runs this timetable on every project automatically, warns you before a pay less window closes, and puts the same dates on the certificate the client receives.
Start free trial See how it works30 days free · No card required
Not your whole portfolio. One live job, one certificate. If it does not save you time the first time you use it, walk away and take your data with you.