How do you write an extension of time claim?
An extension of time claim states the delay event, the contract clause that allows time, the date and length of the delay, and the effect on the critical path. It must be backed by records and given within the contract's notice period.
Step 1: give notice
Most contracts require written notice soon after the delay starts. Many standard forms, such as AS 4000, use about 28 days. Check your clause for the exact period and the exact form of notice.
Step 2: name the event and the clause
State what caused the delay and match it to a clause that allows time, such as a variation, a late instruction, a latent condition or a client delay. Bad weather and your own late work usually do not qualify.
Step 3: show the effect on the critical path
A delay only earns time if it delays completion. Show the activity affected, the programme before the event, and the programme after it. A delay to an activity with float often earns no time.
Step 4: attach the proof
- The notice and the reply.
- The baseline programme and the updated programme.
- Site diaries, photos and weather records.
- Instructions, RFIs and drawing issue dates.
Step 5: ask for a number of days
State the days claimed and how you worked them out. Add a cost claim for delay as a separate item if the contract allows it.
Related answers
Questions
What is the most common reason an EOT claim fails?
Late notice, or no link between the event and the critical path.
Can I claim time and money together?
Often yes, if the contract gives both. Many contracts split the right to time from the right to delay costs, so read both clauses.
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