The End of JCT 2016: What Does it Mean for Your Business?

The JCT 2016 contract suite is coming to an end. From 31 March 2026, the Joint Contracts Tribunal will withdraw access to its 2016 contracts, marking the industry’s full transition to the JCT 2024 suite.

For developers, contractors and employers still relying on JCT 2016, the change raises important questions. Will existing contracts remain valid? What obligations have changed under the new edition? What practical steps should construction businesses take now to avoid disruption to future projects?

This guide explains what the end of JCT 2016 means for your business, the key changes in JCT 2024, and how to prepare for the transition with confidence.

If you are updating templates for new projects, our team can advise on construction contracts and how to manage risk when moving from JCT 2016 to JCT 2024.

When will the JCT 2016 suite be unavailable?

JCT has confirmed that their 2016 contracts will no longer be available from 31 March 2026.

Why are changes being made?

The Joint Contracts Tribunal (JCT) was formed in 1931 and their construction contracts are updated from time to time in line with best practice and changes in legislation.

In recent years, JCT published contract suites in 2005, 2009 and 2016 before moving to the latest edition which is the 2024 suite. If you want a clearer view of the different forms within the suite before deciding what to use post-March 2026, see our guide on JCT contracts options.

A lot has happened since the 2016 suite was introduced, we’ve experienced the COVID pandemic, global conflicts and the introduction of the Building Safety Act 2022 which is arguably the most important piece of legislation impacting construction in decades which was born in the wake of the Grenfell tragedy so some may argue that the 2024 suite was long overdue.

What changes will JCT 2024 bring?

The 2024 edition reflects both legislative changes and shift in culture. Most notably, it incorporates amendments responding to the Building Safety Act 2022, including enhanced compliance and duty holder obligations.

The drafting has also been modernised with gender neutral language and clearer structure. There is an express recognition of electronic communications, recognising the shift in remote working since the pandemic and the suite also strengthens collaborative working, making what were once optional provisions mandatory.

How can construction businesses prepare for the transition to JCT 2024?

Preparation should start with understanding what has actually changed.

JCT has published helpful guidance notes and track change contracts to show where the 2024 has been amended from the 2016 edition. Those documents are a sensible first port of call before diving into the detail.

Business should also review their standard schedules of amendments and precedents to ensure they align with the updated drafting

Early internal training for commercial teams and contract administrators will help simply “cutting and pasting” old risk positions into the new forms of contract.

For businesses still procuring under standard forms, it helps to review which JCT contracts you use most often and whether your amendments still work under the 2024 suite.

Where contract changes lead to disagreements about notices, scope, or payment, our team also supports clients with construction claims and disputes.

Will existing JCT 2016 contracts remain valid, and how should businesses manage ongoing projects?

Yes. Contracts entered into under the 2016 remain legally valid and enforceable. The publication of the 2024 suite does not affect existing contractual arrangements or ongoing projects.

However, JCT will not indefinitely support the 2016 version via its online platform and that support is due to end on 31 March 2026.

For live projects using the 2016 suite, parties should continue administering the contract in accordance with its existing terms rather than attempting to upgrade mid project. That said, businesses should be mindful that simply continuing to use the 2016 edition for new procurements may not be straightforward once it becomes unsupported and they should factor that into forward planning and template updates.

Are there any new risks or compliance obligations introduced in the revised JCT suite?

Yes – particularly in relation to building safety and sustainability. The 2024 suit reflects the enhanced regime introduced by the Building Safey Act 2022, with clearer obligations around regulatory compliance, dutyholder roles and the provision of information.

Importantly, sustainability and environmental considerations which were previously addressed through option clauses in the 2016 are now embedded within the core conditions. That shift from optional to mandatory elevates environmental performance from a “bolt on” to fundamental.

Will the the revised JCT suite influence dispute resolution strategies or mechanisms?

Yes, in a measured but important way. A provision that was previously optional in the 2016 suite “Notification and Negotiation of Disputes” is now embedded within the core conditions. Parties are required to notify disputes and meet as soon as practicable to seek resolution through direct, good faith discussions. This aligns the position under JCT more closely to that under NEC. It also formalises early engagement and may encourage resolution before positions harden.

In addition, parties now have greater flexibility to nominate their own dispute resolution bodies, rather than selecting from a re-approved list as they did in 2016. This allows more strategic alignment with preferred institutions at the outset of a project.

For higher-value disputes where parties want a final forum beyond adjudication, it is also worth considering how the Arbitration Act 2025 may influence arbitration clauses used alongside JCT.

Are there sector-specific considerations that businesses should watch for?

Yes- higher risk residential developments will feel the greatest impact from enhanced building safety obligations flowing from the Building Safety Act 2022. Dutyholder coordination, information management and regulatory gateways will require closer contractual alignment.

Public sector employers may also focus more heavily on collaboration and sustainability give that such provisions are now embedded in core terms.

Infrastructure and utilities projects, where bespoke amendments are common should be carefully reviewed to ensure legacy risk allocation remains coherent under the 2024 suite.

What are the most common pitfalls businesses may encounter during the transition

One of the most common risks is assuming the change are purely cosmetic. While some updates modernise language and structure, others, particularly around building safety, alter substantive obligations.

Another pitfall is recycling 2016 schedules of amendments without checking how they interact with the revised drafting in 2024. Inconsistencies, duplication or unintended risk shifts can easily arise.

Finally, failing to brief commercial and project teams on updated notice provisions and collaborative requirements may lead to costly procedural missteps early in live projects.

Contact our construction solicitors

The withdrawal of JCT 2016 signals a shift towards a more modern contractual framework shaped by building safety, sustainability and collaborative working. While existing contracts remain valid, businesses procuring new projects should now review their documentation and processes to ensure they align with the 2024 suite.

If your organisation would like advice on transitioning to JCT 2024, our construction specialists can help you review your contracts and manage the change with confidence. Get in touch with our construction solicitors to discuss your project or contractual arrangements.

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