NEC X12 links separate contracts so that the parties work together towards shared objectives, led by a Core Group and rewarded through Key Performance Indicators. NEC4 calls it "Multiparty collaboration"; NEC3 called the same Option "Partnering". It can't be used in the same contract as Option X20.
X12 doesn't replace the contracts it links. Each Partner keeps its own contract, with the same rights against the other party to it, and X12 adds a layer of collaboration on top. It's among the more unusual NEC secondary Options, because it only works if several contracts on a project all include it.
Who does what
| Term | Role | NEC3 vs NEC4 |
|---|---|---|
| Partners | Those with a contract on the project that includes the Option | NEC3: those named in the Schedule of Partners |
| Own Contract | A contract between two Partners | Same idea |
| Core Group | Selected Partners who decide for all on the matters in the Partnering Information | Same idea |
| Promoter | The Partner whose objective is stated; by default, its representative chairs the Core Group | NEC3: this role is the Client |
| Partnering Information | How the Partners work together | Same |
What the Option adds
- A duty to help each other. Partners collaborate to achieve the Promoter's objective and every other Partner's stated objectives.
- Early warning across contracts. A Partner warns others of matters that could affect their objectives, under X12.3. This reaches beyond the usual two-party warning in clause 15.
- Information sharing. A Partner can ask another for what it needs, and advice to the Core Group has to be open. That includes showing contingency and risk allowances in forecasts of future work.
- Two compensation events. A Core Group change to the Partnering Information is an event at X12.3(6). A programme change to follow its revised timetable is an event at X12.3(7). Both may lead to reduced Prices.
- Incentives. Meeting or beating a Key Performance Indicator target earns the amount in the Schedule of Partners, paid through that Partner's Own Contract, under X12.4.
A short example
A fictional rail station upgrade involves a Client, a civils Contractor, a signalling specialist and a design consultant, each with a contract including X12. The Core Group includes all four and is led by the Client's representative. The shared target is that a stated track possession is handed back on time.
In week 30, the signalling specialist warns the Core Group that a software release may slip. The Core Group agrees to move the civils work two weeks earlier, and it revises the timetable. The civils Contractor changes its programme as a result, which is a compensation event under X12.3(7), and the possession target is met. Each Partner with that indicator in the Schedule of Partners is paid its stated amount.
The signalling specialist has no contract with the civils Contractor, so the Core Group decision is carried out by instructions under each Partner's Own Contract, under X12.3(5). This is why those contracts have to be drafted to fit together.
What it doesn't do
- It doesn't create a partnership in law between Partners who aren't Parties to the same contract. The Option says so at X12.2 in NEC3 and in the NEC4 subcontract text.
- It doesn't obviously give a direct claim against a Partner you have no contract with. Take legal advice if you are relying on that.
- It doesn't pay a share of savings by itself. Incentives come from the Schedule of Partners, and any share comes from the main Option.
Practical checks
- Do all the relevant contracts include the Option? A Partner's subcontract without it creates a gap.
- Is the Schedule of Partners complete, with objectives and targets stated in terms people can measure?
- Does the Partnering Information actually say how decisions are made, and what happens if the Core Group disagrees?
- Have you dropped any X20 entry? X12 and X20 are alternatives on the same contract.
- Have Partners told the Core Group before subcontracting? The Option expects it.
On an Early Contractor Involvement job, X12 can sit well alongside the two-stage approach, because it brings designers and specialists into the same group. See early contractor involvement under NEC.
Related guides
- NEC Secondary Options: X, Y, W and Z Clauses Explained
- X13: Performance Bond
- X14: Advanced Payment to the Contractor
- X15: The Contractor's Design
- X10: Information Modelling
- X11: Termination by the Client
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This guide is general information in our own words, not legal advice. Your contract and its Contract Data always govern. NEC, NEC3 and NEC4 are trade marks of Thomas Telford Ltd; Contract Status is not affiliated with or endorsed by NEC.