The NEC (New Engineering Contract) suite is one of the most widely used families of contracts in construction. Designed to promote a collaborative and forward-thinking approach, NEC contracts provide clarity, flexibility, and a consistent structure across a wide range of project types.
In this article, we’ll explore the selection of contracts available under the widely popular NEC3 suite.
1. Engineering and Construction Contract (ECC)
The ECC is the most commonly used NEC contract form. It captures the core principles of NEC and is typically used between a client and main contractor.
Within the ECC, there are six pricing options, allowing the Employer to choose the structure that provides the best value for their project.
2. Engineering and Construction Subcontract (ECS)
The ECS mirrors the ECC but applies when a main contractor sub-lets part of the project to a subcontractor.
It provides back-to-back clauses with the ECC, with terminology adapted (Contractor/Subcontractor) and adjusted timescales to align with the main contract.
3. Engineering and Construction Short Contract (ECSC)
The ECSC is a simplified, “cut-down” version of the ECC.
- Suitable for low-risk projects.
- Used for straightforward Employer/Contractor agreements.
4. Engineering and Construction Short Subcontract (ECSS)
The ECSS complements the ECSC, providing a simplified structure for contractor–subcontractor agreements.
Its clauses are back-to-back with the ECSC, ensuring consistency across the supply chain.
5. Professional Services Contract (PSC)
The PSC is designed for those providing professional services such as design, consultancy, or project management.
It ensures service providers are bound by the same NEC principles as contractors and clients, giving consistency across the project team.
6. Professional Services Short Contract (PSSC)
The PSSC is a lighter version of the PSC, used for less complex professional assignments.
For example, it might be used for a small team managing the administration of the ECC on behalf of the Employer.
7. Framework Contract (FC)
The Framework Contract provides an umbrella agreement covering a set period of time.
- Projects (or “call-offs”) are let under the framework.
- Parties follow the headline clauses of the framework, alongside specific clauses for each call-off.
- Typically shorter and slimmer than other NEC contracts.
8. Term Service Contract (TSC)
The TSC is used for operational or maintenance projects rather than new builds.
For example:
- Maintaining street lighting or other infrastructure assets.
- Ensuring agreed service levels are met over a defined term.
A short form version exists for low-risk maintenance projects.
9. Supply Contract / Short Supply Contract (SC / SSC)
These contracts apply to suppliers of goods and materials.
- SC: For major, project-specific items designed and manufactured for a contract.
- SSC: For more general supplies delivered to a project.
Note: These contracts do not cover site work.
10. Adjudicator’s Contract (AC)
The AC is used when disputes arise between parties. It sets out the responsibilities and procedures for an Adjudicator to follow under NEC.
Final Thoughts
The NEC3 suite is designed to cover every stage of a construction project—from design and supply to construction, maintenance, and dispute resolution. By using consistent principles and back-to-back clauses, NEC helps to reduce disputes, improve collaboration, and provide flexibility across the supply chain.
Whether you’re managing a large infrastructure scheme or a low-risk short-term contract, there’s an NEC3 form designed to fit.
Find out how we can help you at metroun.co.uk
Why not check out our video on NEC3 contracts:
