Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

NEC3/NEC4 definition

What does NEC3/NEC4 mean? nec3/NEC4 refers to successive editions of the NEC suite of standard-form construction and engineering contracts for procuring and delivering works, services and supplies. Widely used across the UK and Ireland, the label is not defined in legislation or case law; it is industry shorthand for the 2005 (updated 2013) NEC3 suite and the NEC4 suite first issued in June 2017 and since amended. Key legal features include an obligation to act in a spirit of mutual trust and co‑operation, proactive management through early warnings, programmes and compensation events, clear risk allocation, and main pricing Options A–F. The suites include aligned...

NEC3/NEC4 Supply Contract for high-value goods: UK legal overview of options, scope, programme, risk, testing, liability, termination and adjudication

Published by a LexisNexis Construction expert

Practice notes

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Overview of the Supply Contract

The Supply Contract, known as the ‘SC’, forms part of the NEC3 and NEC4 suites of contracts (see Practice Note: NEC contracts—introduction). Most construction practitioners are more familiar with the NEC3/NEC4 Engineering and Construction Contract (EEC); however, where an employer intends to purchase Goods or plant and material in relation to a project, the NEC3/NEC4 Supply Contract can also be included as part of the documentation for that project.

The Supply Contract may equally be used on a standalone basis to buy goods when a significant level of management control is required; but—as with any contract—it should be considered carefully to ensure its terms do not conflict with any other non‑NEC contracts used in relation to the same project.

It is designed for the purchase of high‑value goods together with related services.

The NEC have produced it with the intention that it be more even‑handed between buyer and seller than parties’ own standard terms and conditions of supply are likely to be.

The NEC3/NEC4 Supply Contract can, for example, be used to procure high‑value Plant and machinery in the mining or energy sectors, or for heavy manufacturing or production facilities...

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Web page updated on 21/05/2026

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