NEC3 and NEC4 Compared – Service Contracts

NEC3 and NEC4 Compared – Service Contracts
This online training module is designed to summarise the changes between NEC3 and NEC4 for existing users, enabling them to identify the differences when NEC4 becomes their contract of choice.

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You have chosen Virtual training, on 8th April 2021

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The emphasis of this module is comparisons between the NEC3 and NEC4 service contracts, in particular looking at changes in the NEC4 Term Service Contract (TSC) and NEC4 Professional Service Contract (PSC).


NEC3 has made a significant contribution to the engineering and construction industry in particular, to do things differently and better. It is 12 years since NEC3 was published, and through a network of more than 300 companies who are regularly engaged via the NEC3 Users’ Group, and from clients generally, the NEC team has received feedback and requests for features and contract solutions to support on-going improvement.

NEC4 has taken the successful NEC3 contract suite and enhanced it, with some new features and some new forms of contract. All of the changes are a direct result of feedback from industry, to support methods and provide solutions which clients are demanding.

Session 1 - New contracts

  • NEC4 Design Build and Operate Contract (DBOC)
  • NEC4 Alliance Contract
  • NEC4 Professional Service Subcontract (PSS)
  • NEC4 Term Service Subcontract (TSS)
  • NEC4 Dispute Resolution Service Contract (DRSC)
  • New Guidance

Session 2 - Improvements in main contracts

  • BIM Option X10
  • Extending the Service Period X23
  • Accounting periods
  • Finality of assessments
  • Contractor’s proposals

Session 3 - Other improvements
Session 4 - Test
Session 5 - Next steps

  • Products and services available from NEC


Approximately 60-75 minutes.
The length of time taken varies depending on how quickly individuals study and absorb the material.

Please note that the licence is valid for 6 months only from date of purchase.

Successful completion of this course will award you 15 credit points toward your Online Academy qualification.

Delegates attending this course should have some knowledge and experience with NEC contracts in action. Those wishing to refresh their knowledge first should look at the Introduction to NEC4 training, which is also an online module.

This course is highly recommended for:

  • Users of NEC3 contracts keen to see how the contracts have developed into the new edition as well as the new functionality on offer – including the new contracts.

It is designed for those who work with any of the NEC contracts including:

  • Project managers
  • Contract managers
  • Service managers
  • Procurement managers
  • Supervisors
  • Quantity surveyors
  • Clients 
  • Consultants 
  • Contractors and their supply chain

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