Extension of time claims: how EOTs actually get assessed

What an EOT actually is — and isn’t

An extension of time does one thing: it moves the date for practical completion, which relieves the contractor from liquidated damages for the period of qualifying delay. That’s it.

It is not, by itself, money. This is the most expensive misunderstanding in contract administration. Time and cost are separate claims: an EOT deals with the contractor’s exposure to LDs; delay damages deal with the contractor’s costs of being on site longer — and under AS 4000, only some causes of delay carry a right to those costs. Compensable causes (broadly, delays the Principal’s side caused) can bring both time and money. Neutral causes — weather being the classic — typically bring time only. The contractor wears their own costs; you don’t pay for rain.

Grant time without checking the money consequences and you may have paid for something the contract gave away free. Refuse time to avoid paying money and you’ve confused two different questions — usually at your own cost, as we’ll get to.

What qualifies — on paper

Unamended AS 4000 entitles the contractor to claim for delays caused by things beyond their reasonable control: variations, latent conditions, acts or omissions of the Principal and its consultants, delayed approvals, industrial action, and weather as the contract defines it. What doesn’t qualify: the contractor’s own inefficiency, their subcontractor’s failures, resequencing for their own convenience.

That’s the textbook. Your contract is not the textbook. Melbourne head contracts arrive with the EOT clause heavily amended — qualifying causes narrowed, weather redefined, notice periods shortened, and time bars converted into absolute conditions. The entitlement that matters is the one in the departures schedule, which is why the first task on any engagement is reading it. All of it.

The three tests that decide a claim

Strip the argument out of any EOT dispute and the assessment comes down to three questions.

Did the notice comply? Nearly every contract makes the claim conditional on written notice within a stated window — commonly 28 days in unamended AS 4000, often far shorter once amended, and frequently drafted as a strict time bar: no notice, no entitlement, regardless of merit. Courts have enforced these bars. Contractors lose more EOTs to late paperwork than to weak facts — and Principals should still want the notice discipline, not as a gotcha, but because contemporaneous notice is what makes delay assessable at all.

Did the delay hit the critical path? Delay to an activity with float is inconvenience, not entitlement. Delay that pushes the critical path pushes completion. This is where the quality of the programme — and who owns the float — decides everything, and where an out-of-date construction programme makes honest assessment impossible for everyone.

What else was happening at the same time? Concurrent delay — a qualifying cause and a contractor-caused delay operating over the same period — is the genuinely hard case. Standard forms are mostly silent; amended contracts increasingly allocate it (usually against the contractor); assessors are left weighing causes with imperfect records. There is no clean rule here, only a clean discipline: the party with the better contemporaneous records generally wins the argument.

The failure modes that create disputes

Having sat on all three sides of these claims, the same four failures keep appearing — three of them on the client’s side of the table.

Sitting on claims. The reflex to “park” an EOT to keep pressure on the builder backfires twice. Under AS 4000, a compliant claim the Superintendent doesn’t answer inside the response window can be deemed granted as claimed — the full ask, unassessed. And a backlog of unanswered claims is the raw material every formal dispute is built from. As we covered in the Superintendent article, certification deadlines are mechanisms, not suggestions.

Refusing time the contract owes. If the Principal’s side caused delay and the contract’s EOT machinery isn’t operated honestly, the prevention principle can put time at large — the fixed completion date, and the liquidated damages attached to it, can fall away entirely. Refusing a valid EOT to protect your LDs is how you lose your LDs. It’s also why AS 4000 gives the Superintendent power to extend time even without a claim: that power exists to protect the Principal, and a Superintendent who never uses it doesn’t understand it.

Treating every claim as combat. A contractor who learns that honest claims get fought and inflated claims get negotiated will rationally inflate every claim. Assessment discipline — grant what the evidence supports, refuse what it doesn’t, in writing, on time — is the only behaviour that trains the other side of the table to submit honest paper.

Assessing from memory. EOT assessment is evidence work: notices against dates, delay against programme logic, records against the claimed cause. Do it months later from recollection and you’re negotiating, not assessing.

The Victorian layer

In Victoria, security of payment adds a twist worth knowing before the first claim arrives: the Act’s excluded-amounts regime keeps most time-related costs out of adjudication. Delay money that interstate contractors might chase through a quick adjudication has to run through the contract’s own machinery here — which makes the quality of that machinery, and the discipline of its administration, matter more, not less. The local specifics are on our Melbourne page.

What good looks like

A current, logic-checked programme on every update. Notices answered inside their windows — every one. Claims assessed as they arrive, on evidence, with the assessment recorded even when the answer is no. And records good enough that any claim, in either direction, can be tested against what actually happened rather than what everyone now remembers.

That last part is where our AI back office earns its keep: every programme update interrogated for logic and slippage, every notice tracked against its timeframe, every claim reconciled against the registers — continuously, so the assessment is ready before the argument starts.

The blunt summary

EOTs are not the enemy. Unassessed EOTs are. Time and money are separate questions; notice and evidence decide both; and the machinery only protects you if it’s operated honestly — including when the honest answer favours the builder.

If your project has a drawer of unanswered delay claims, that drawer is compounding. It’s worth opening before the contractor’s lawyers do.

Invero Projects administers EOT and delay claims as independent Superintendent and contract administrator on Australian standard contracts — quoted per scope, published like everything else. Or start with a Project Health Check: a fixed-fee read of your project’s claims position before it becomes a dispute.

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