Contracts

What is an early warning notice in construction?

An early warning notice is a formal heads-up from one party to the other that something could raise cost, delay completion, or hurt quality, given early enough that the team can act on it.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

An early warning notice is a short, formal notice that a problem might be coming. It is not a claim and it does not argue who is at fault. It says: here is a risk, here is what it could affect, let us talk about how to avoid it. The term comes from the NEC family of contracts, where early warnings are a core obligation, but the idea shows up in many U.S. contracts as a general duty to notify the owner of potential delays or cost impacts.

How early warning works under NEC4

In the NEC4 Engineering and Construction Contract, early warnings sit in clause 15 (clause 16 in NEC3). In plain terms, if either the contractor or the project manager sees a potential issue that could affect time, cost, or quality, it notifies the other, and the two meet to agree on actions to avoid or reduce the effect. According to industry guidance from CECA, under clause 15.2 the first Early Warning Register is produced within one week of the starting date and the first early warning meeting is held within two weeks, with later meetings at the interval set in the contract data.

The register is deliberately simple. It records a description of the risk and the action to be taken to avoid or reduce it, plus practical columns like a number, date, and status. It does not assign blame.

Why a missing warning costs money

Under NEC4, failing to give a warning does not stop a matter from being a compensation event. But under clause 61.5, if the contractor should have warned and did not, the event can be assessed as if the warning had been given. CECA's example: a quotation of 60,000 pounds where earlier notice could have mitigated half the cost may be assessed at 30,000. On cost-reimbursable NEC options, costs caused by a missed warning can be disallowed.

A U.S. job example

Say a GC on a $7 million lab fit-out learns from its supplier that the switchgear ship date is slipping six weeks. The contract does not use the NEC, but it requires prompt written notice of anything that may delay the work. The PM sends a one-page notice that day: the item, the new date, the activities on the critical path it touches, and two options (temporary power, or resequencing the MEP rough-in). The owner picks resequencing. No claim, no fight, and the job finishes two weeks late instead of six. Had the PM waited until the gear actually missed its date, the options would have been gone, and the owner would argue that a timely warning would have avoided most of the delay.

Common mistakes

  1. Holding back a warning because it feels like admitting fault. It is not an admission.
  2. Mixing early warnings with formal claims. Keep the notice short and factual; the notice of claim is a separate step.
  3. Not tracking warnings to closure. A risk register entry that never gets an action is just a list.
  4. Sending warnings by text or phone only. Put them in writing and log them.

Related terms

See excusable delay, long-lead items, and recovery schedule. For U.S. practice, how to document construction delays for claims covers what to write down.

Frequently asked questions

Is an early warning notice the same as a claim?

No. An early warning flags a possible problem so the parties can reduce its effect. A claim asks for time or money for something that has happened.

Who can give an early warning?

Under NEC4 clause 15.1, either the contractor or the project manager, although CECA notes the practical consequences of a missed warning fall more heavily on the contractor. In U.S. contracts, the duty is usually written as the contractor's obligation to notify the owner.

What is an Early Warning Register?

Under NEC4, a register listing each early warning with a description of the risk and the actions to avoid or reduce it. It replaced the NEC3 risk register.

What happens if I do not give an early warning?

Under NEC4, a related compensation event can be assessed as if the warning had been given, which can reduce what you are paid. Other contracts may treat late notice as a waiver.

Sources

  1. CECA: NEC4 Bulletin No. 5, Early Warnings and Liability for Not Notifying (May 2021)
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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