FIDIC reference
Sub-Clause 8.4 — Advance Warning
A duty to warn in advance of probable future events affecting the works, price or time.
Applies in: Red BookYellow BookSilver Book
Sub-Clause 8.4 is new in the 2017 edition. Each party (and the Engineer) must give advance notice of known probable future events that may adversely affect the work of the personnel, increase the Contract Price or delay execution. It is an early-warning tool for jointly reducing risk. There is no direct sanction period, but ignoring it may be taken into account when a claim is later assessed.
Key points
- New in the 2017 edition (early warning).
- Concerns probable future events.
- Applies to both parties and the Engineer.
- Supports a collaborative risk-management culture.
How this works in practice
Advance warning is a 2017 innovation and is systematically underused. It is not a claim and it does not replace a notice under 20.2: its purpose is to let the parties learn of a probable adverse event early enough to mitigate. In practice it works both ways, as project hygiene and as evidence of good faith. A Contractor that flagged a delivery risk in advance stands in a fundamentally different position in a later dispute than one that stayed silent until the date was missed.
Common traps
- An advance warning is filed instead of a Notice of Claim — meanwhile the 20.2 clock keeps running.
- The warning is given verbally at a meeting with no minutes, leaving it almost worthless as evidence.
- Particular Conditions convert advance warning into a condition precedent to a later claim, which the base FIDIC does not do.
Versions: 1999 → 2017 → 2022
- 1999
There was no direct equivalent.
- 2017
A new Sub-Clause 8.4 Advance Warning was introduced.
- 2022
No substantive change in the 2022 reprint.
Clause FAQ
Which FIDIC books use Sub-Clause 8.4?
The clause applies in Red Book, Yellow Book, Silver Book. Particular Conditions may change the standard risk allocation, so always check the project contract.
Is advance warning mandatory, and what follows from not giving it?
In the base edition it is an obligation, but failing to give it does not of itself bar a claim. There is a consequence, though: a determination under Sub-Clause 3.7 and a DAAB may take into account that the other party was denied the chance to mitigate. That affects the quantum recovered, even where the right to claim formally survives.
How does advance warning differ from the NEC early warning?
The idea is shared — early notification of risk — but NEC’s mechanics are tighter: it has a risk register and regular meetings, and late notification can directly cut compensation. FIDIC 2017 adopted the principle but kept it softer and without a formal register. Many projects fill the gap voluntarily by running a risk register as a project procedure.
Related clauses
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Reference material, not legal advice. Always check your contract and the Particular Conditions.