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X10

Information modelling (BIM)

Reviewed by LazyQS Editorial·Last reviewed: 2026-02-19

Plain English Explanation

X10 sets out the requirements for information modelling — principally Building Information Modelling (BIM). The Contractor is required to comply with an Information Model and Information Execution Plan (IEP) as part of their obligations. X10 integrates BIM requirements directly into the NEC contract structure.

The specific BIM requirements — the software, standards, deliverables, and level of information required — are stated in the Scope and the Information Execution Plan. X10 makes compliance with these requirements a contractual obligation rather than a technical aspiration.

As BIM Level 2 becomes standard on public sector UK projects and increasingly expected on major private sector projects, X10 is becoming more commonly included.

Key Takeaway

BIM under X10 is a contractual obligation, not a best-endeavours aspiration — if you lack the software or expertise to meet the Information Execution Plan requirements, price the gap or flag it at tender.

What This Means for Subcontractors

Subcontractors are often required to contribute to the project's information model. This means producing and delivering BIM data in specific formats and to specific standards, often within defined timescales. BIM capability is increasingly a tender requirement. Check what software, training, and resource you need to comply with X10 before pricing.

Common Risks & Disputes

  • 1Subcontractors lacking the BIM capability required by X10 at the time of tender
  • 2Information Execution Plan requirements not being clearly defined at tender, leading to scope creep in BIM deliverables
  • 3BIM data quality disputes — the standard of information required can be subjective
  • 4Time and cost of producing BIM data not being adequately priced in the subcontract
  • 5Interfaces between different subcontractors' BIM models causing clashes that need resolution

Sources

  1. NEC4 ECC Secondary Option X10— NEC4 ECC
  2. RICS Guidance Note: BIM and Information Modelling Under NEC4 X10— RICS
  3. ICE Guidance: BIM Level 2 and Contractual Information Requirements— ICE

Related Clauses

X8

Undertakings to the Client or Others

Undertakings to Others — both create structured obligations to third-party stakeholders

X9

Transfer of rights

Transfer of rights — BIM model outputs are often subject to IP transfer under X9

Continue Learning

Category Overview

Back to X Clauses (Secondary Options)

Adjacent Clauses

X9 Transfer of rightsX11 Termination by the Client on notice

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