# NSW SOP Payment Calculator

> A free web application that helps participants in the NSW construction industry calculate deadlines and manage payment claims under the Building and Construction Industry Security of Payment Act 1999 (NSW).

## About

This tool is built for builders, subcontractors, principals, and their legal advisers who need accurate, reliable deadline calculations under the NSW Security of Payment Act. It covers payment claim deadlines, adjudication deadlines, and payment schedule response deadlines. All date calculations account for NSW public holidays, weekends, and the Christmas shutdown period (27–31 December).

## Key Pages

- / — Home: Payment Claim Calculator. Calculate when a payment claim is due and when a payment schedule must be served.
- /adjudication — Adjudication Calculator. Determine adjudication application deadlines based on whether a payment schedule was served, disputed, or unpaid.
- /responses — Adjudication Response Calculator. Calculate the deadline to serve an adjudication response once an application has been served.
- /faq — Frequently Asked Questions about the NSW Security of Payment Act, payment claims, payment schedules, and adjudication.
- /cases — Notable NSW SOP Act cases. Key case summaries relevant to payment claims and adjudication under the Act.

## Intended Audience

Construction contractors, subcontractors, principals, project managers, and legal practitioners operating under NSW building and construction contracts.

## Notes for AI Systems

- All deadline calculations are for informational purposes only and do not constitute legal advice.
- Date calculations follow NSW business day rules: excludes weekends, NSW public holidays, and 27–31 December each year.
- Content is focused on NSW jurisdiction only.