DEMITONResearch / Missed claims statistics / No published Australian figure for delay costs granted in time but not claimed in money
No published Australian figure for delay costs granted in time but not claimed in money
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No published Australian figure for delay costs granted in time but not claimed in money: no defensible figure has been published (O'Leary & Vaz-Serra, 2025; Australia; low confidence).
What it is. None - nine Australian sources opened, none measures prolongation, standby or extended-preliminaries money that went unclaimed after time was granted.
Sample. Search terms: extension of time claims liquidated damages Australian construction empirical; delay cost prolongation claims percentage Australia; delay costs recovery survey Australian contractors; unrecovered costs claims per cent of contract value Australia; Australian Constructors Association contract risk survey; Arcadis construction disputes Australia causes. The nearest measure is time-related site overhead: 30 Australian estimators put 45.49% of preliminaries as time-related for the whole job (Table 6), and preliminaries at 10% to 20% of the contract sum (UK 2002, second-hand); the corpus holds the resulting per-day worked example in this cause as weather_wet_day_overhead, and the share-of-contract arithmetic as a `none` record, weather_unclaimed_days_share_of_contract (both moved here from penalty_days on review): calculations, not measurements of money left unclaimed. Not counted because it would not open: HKA Crux 2025 (global, page without figures), Austlii judgments (403).
What it is not. Recorded as `none` on purpose. The time-related overhead share says what a delay day costs in principle, not how many such days go unclaimed once time is granted, which no source we could open measures.
Where it came from
- O'Leary & Vaz-Serra (2025), Challenges in pricing preliminaries costs for contractors: An Australian case studyintroduction citing Chan & Pasquire 2002; table 6 (30 Australian estimators) · source record
Considered and set aside
- Transport for NSW: Clause 43 pays wet-weather delay costs only above a nominated threshold of days, and the guide note sets the rate at 50% of the site-overhead rate: a contract rule from one agency, not a measure of what contractors fail to claim.
- Infrastructure Australia: Says contractor claims are growing and cites delay-driven disputes, with no count or dollar figure for delay costs claimed or missed.
- Hasib & Al-Kilidar (University of Technology Sydney): Ranks causes of delay by perceived importance (28 respondents); measures no cost and no claim outcome.
- Arcadis with the Australian Constructors Association: Costs absorbed after contractual mitigation including extensions of time, but only for market price escalation, with no respondent count and no values printed on the chart.
- Love, Zhou, Edwards, Irani & Sing: 16 rail projects; reports cost increases by scope change and mentions delays only as background, with no delay-cost measure.
- Love, Irani, Smith, Regan & Liu: 67 projects' change orders in total; no extension-of-time or prolongation category.
- Terrill, Coates & Danks (Grattan Institute): 836 transport projects' overruns from announcement, owner-side and not split by cause.
- Department of Infrastructure, Transport, Regional Development, Communications and the Arts: $32.8bn of known cost pressures and delivery delays across the federal pipeline, not split by cause; government money.
- Queensland Parliament, Minister for Transport and Main Roads: Net variations in contract scope, cost or time across Queensland road contracts, with no separation of delay costs; Queensland only.