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Construction Payment Deadline Calculator (UK)

Free Construction Act payment deadline calculator. Calculate due dates, payment notice deadlines, and pay less notice deadlines for JCT, NEC, and bespoke contracts.

Payment Deadline Calculator

Enter your contract type and application date to calculate all Construction Act payment deadlines.

Payment Timeline

Application Date
Wed, 29 Apr 2026
1
Due Date
Wed, 13 May 2026

Payment is due from this date

2
Payment Notice Deadline
Mon, 18 May 2026

Last day to issue Payment Notice

3
Pay Less Notice Deadline
Wed, 20 May 2026

Last day to issue Pay Less Notice

Final Date for Payment
Wed, 27 May 2026

Payment must be made by this date

Due Date
Wed, 13 May 2026
Final Payment Date
Wed, 27 May 2026

These dates are calculated based on standard contract terms. Your specific contract may vary - always check your contract conditions. Weekends and bank holidays may affect deadlines depending on contract terms.

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Construction Payment Deadline Calculator FAQ

The calculator supports JCT contracts (Design and Build, Standard Building Contract), NEC3 and NEC4 contracts, and allows custom deadline entry for bespoke contracts. Select your contract type to see the relevant default timings.
While the Construction Act sets minimum standards, contracts can (and often do) vary the specific timings. Use the "Custom" option to enter your contract's specific due date, notice, and final payment timings.
Yes. After calculating, use the "Add to Calendar" button to download an ICS file. This works with Outlook, Google Calendar, Apple Calendar, and most other calendar applications.
The calculator shows calendar days as per Construction Act requirements. Your contract may specify that deadlines falling on non-working days move to the next working day - check your specific contract terms.

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