What is an NEC4 Compensation Event? A Practical Guide

1. What is a Compensation Event?

In NEC4, a compensation event (CE) is any event listed in Clause 60.1 that entitles the Contractor to a change in the Prices, the Completion Date, or both. Unlike traditional contracts that distinguish between variations, changes, and breaches — NEC4 treats them all as compensation events.

This is one of NEC4's most distinctive features. Instead of arguing about whether something is a variation, a change, or a breach of contract — you simply ask: "Is this a compensation event under Clause 60.1?"

If yes, the Contractor is entitled to be compensated. If no, the risk sits with the Contractor. It's binary. It's clear. In theory.

2. Clause 60.1 — The CE Triggers

Clause 60.1 lists 21 events that qualify as compensation events. The most commonly used ones are:

• 60.1(1) — The Project Manager gives an instruction changing the Scope
• 60.1(2) — The Client does not allow access to and use of a part of the Site by the later of its access date and the date on the Accepted Programme
• 60.1(3) — The Client does not provide something it is to provide by the date shown on the Accepted Programme
• 60.1(4) — The PM gives an instruction to stop or not start work, or to change a Key Date
• 60.1(5) — The Client or Others do not work within the times stated in the Accepted Programme or the conditions in the Scope
• 60.1(12) — Physical conditions which an experienced contractor would have judged to have such a small chance of occurring that it would be unreasonable to allow for them

Each trigger has specific conditions. For example, 60.1(12) — the "physical conditions" clause — is one of the most disputed. The test is whether an experienced contractor would have reasonably anticipated the condition. This is a factual test, not a legal one.

3. The 8-Week Time Bar (Clause 61.3)

The clock starts when the Contractor should reasonably have become aware — not when formal notice is prepared, not when the full cost impact is known. This is the single most expensive trap in NEC4.

Contractors have lost six-figure sums when a potential CE notification was delayed while cost information was gathered before submitting. By the time the full quote was ready, the 8-week window had closed. Notify first, price second.

4. How to Notify a Compensation Event

The notification process under NEC4 is straightforward but unforgiving:

1. Notify immediately — as soon as you become aware of a potential CE, notify the Project Manager in writing
2. Include the relevant clause — reference the specific sub-clause of 60.1 that applies
3. Provide available details — you don't need full cost information at notification stage, just sufficient details to identify the event
4. Follow up with quotation — the PM will instruct you to submit a quotation (or not, if they disagree it's a CE)

Key point: notification and quotation are separate steps. Don't delay notification because you're still pricing the impact. Notify first, price second.

5. Assessment & Quotations

Under Clause 63, a compensation event is assessed based on:

• Option A/B (Priced Contracts): Actual rates for work done, plus forecast for remaining work
• Option C/D (Target Contracts): Defined Cost + Fee, based on the Contractor's actual cost
• Time: Delay to Completion Date assessed using the Accepted Programme

The quotation must include:

• Direct costs (labour, plant, materials, subcontractor)
• Prolongation costs if the Completion Date is delayed
• Overhead and fee percentages as stated in the Contract Data

A common mistake is forgetting to include overhead and fee. The contract allows it — claim it.

6. Common Pitfalls

• Waiting to notify: The biggest mistake. Notify the minute you suspect a CE. You can always update details later.
• Informal communication: A verbal conversation at a site meeting is not notification. It must be in writing.
• Missing the time bar: Clause 61.3 is absolute. Calendar days, not working days. Track it rigorously.
• Incomplete quotations: Missing overhead, fee, or prolongation costs means you leave money on the table.
• Assuming the PM will identify CEs: The Contractor is responsible for notifying. Don't wait for the PM.

7. Free Tools to Help

NEC4Engine offers free tools to help you manage compensation events:

• NEC4 Clause Search — Find the exact clause you need in seconds
• CE Cost Calculator — Build proper CE quotations in 5 minutes
• CE Notification Draft — AI-drafted Clause 61.3 notification letter
• Programme Delay Analyzer — Track and quantify delay impact