top of page
Search

Construction and Infrastructure Delivery for the Brisbane 2032 Olympic and Paralympic Games - COST AND TIME RISK ANALYSIS

  • Writer: John Lowry
    John Lowry
  • 1 day ago
  • 8 min read

Please Note: This is not an original work. It is an analysis created on an AI model from a series of prompts and publications including all known published Olympics 2032 information and the work of Bent Flybvjerg, Said Business School, University of Oxford, on megaproject management.


Prepared for John Lowry

20 July 2026

1. Executive Summary

Brisbane 2032 carries the same structural cost and schedule risk profile that has affected every Olympic Games since 1960. 

Research led by Professor Bent Flyvbjerg (Saïd Business School, University of Oxford) finds that Olympic Games have overrun their budget in real terms by an average of 172%, with none — zero percent — delivered on or under budget. This is the highest and most consistent overrun rate of any megaproject category, well above roads (20%), bridges and tunnels (34%), or rail (45%).


Brisbane's own record over the five years since winning the bid is consistent with that pattern. The state venues funding envelope has grown from an implied A$4.9bn at bid stage to a locked A$7.1bn today; the Gabba redevelopment rose from A$1.0bn to A$2.7bn before being cancelled outright; the new Victoria Park stadium was rejected as too expensive at A$3.4bn in 2024 only to be reinstated at A$3.785bn in 2025; and the adjacent Cross River Rail project — not a Games venue, but sharing the same labour and materials market — has moved from a A$6.9bn estimate to more than A$19bn, a real increase in the same order of magnitude as Flyvbjerg's Olympic average.


With the majority of venues still in business-case or early-procurement stage as of mid-2025, a forecast peak construction labour shortfall of up to 50,000 workers, and roughly 71% of estimated capital cost still more than 12 months out, Brisbane 2032 is entering its highest-risk delivery window with limited room in its contingency and funding envelope to absorb further escalation without either budget increases, funding transfers between projects, or reductions in project scope.


2. Historical Base Rate: What the Evidence Says About Olympic Cost and Schedule Risk

2.1 The Flyvbjerg / Oxford Olympics findings


Bent Flyvbjerg is the most cited scholar in the world on megaprojects and originator of reference class forecasting, a method Nobel laureate Daniel Kahneman called "the single most important piece of advice regarding how to increase accuracy in forecasting." His and his co-authors' Olympic-specific research finds that:

  • Every Olympic Games since 1960 has overrun its budget, at an average of 172% in real terms — the highest overrun on record for any type of megaproject.

  • Zero percent of Olympic Games have come in on or under budget. For comparison, 10–60% of other capital investment types typically do.

  • Cost and cost overrun for the Games follow a power-law ("fat-tailed") distribution rather than a normal distribution, a phenomenon Flyvbjerg terms "regression to the tail": it is a matter of when, not if, a new extreme overrun exceeds the last. Conventional risk models built on normal-distribution assumptions systematically understate this tail exposure.

  • The Oxford Olympics Study 2024 (Budzier & Flyvbjerg) finds overruns fell until 2008 but have risen since; Paris 2024 still overran by 115% in real terms despite being held up as a leaner Games.

  • Hosts typically budget a 10–15% contingency, which the historical record shows to be structurally inadequate against a fat-tailed distribution averaging 172% overrun.

This base rate does not predict that Brisbane 2032 will overrun by a specific amount, but it establishes the correct reference class: on the evidence of every prior Games, cost growth well beyond initial estimates should be treated as the expected case, not a tail scenario.


3. Brisbane 2032: Current Position

3.1 Governance and planning timeline

  • 21 July 2021 — Queensland confirmed as host city.

  • February 2023 — Intergovernmental Agreement signed between the Australian and Queensland Governments.

  • March 2024 — Independent Venue Review delivered to government; the Gabba rebuild is scrapped in favour of refurbishing Lang Park and the Queensland Sport and Athletics Centre.

  • 26 October 2024 — Change of state government.

  • 29 November 2024 — Games Independent Infrastructure and Coordination Authority (GIICA) established; a 100-Day Review of the entire infrastructure program initiated.

  • 8 March 2025 — 100-Day Review completed; new main stadium at Victoria Park confirmed at A$3.785bn.

  • December 2025 — Unite32 (a joint venture of AECOM and Laing O'Rourke) appointed as infrastructure delivery partner.

In effect, roughly three of the eleven years between winning the bid and the Games were spent on review, reversal and re-planning of the core venue program — exactly the kind of early-stage indecision Flyvbjerg identifies as a leading driver of subsequent cost and schedule pressure, since it compresses the delivery runway for construction itself.

3.2 Budget evolution

Item

Original / Earlier Figure

Current Figure

Movement

Overall bid / Games budget

A$4.9bn (bid, 2021)

A$7.1bn (venues funding envelope)

+45% (venues only)

The Gabba redevelopment

A$1.0bn (Apr 2021)

Scrapped Mar 2024 after peaking at A$2.7bn (Feb 2023)

+170% before cancellation

Main stadium (Victoria Park / Brisbane Stadium, 63,000 seats)

A$3.4bn (rejected as too costly, 2024 review)

A$3.785bn (locked in, 100-Day Review, Mar 2025)

+11% before construction start

Roma Street Station upgrade

Previously disclosed budget

+A$500m identified

Undisclosed % increase

3 minor venues (Chandler, Sunshine Coast Indoor, Sunshine Coast Stadium)

Pre-tender estimate

+A$181m combined, before builder appointed

Escalation pre-contract

Cross River Rail (adjacent enabling rail infrastructure)

A$6.9bn (2019 estimate)

A$19bn+ (2025 reported)

~+175% real terms


3.3 Funding structure

The current A$7.1bn venues funding envelope comprises approximately A$3.8bn in state funding for the venues program (including the new main stadium) and up to A$3.435bn from the Australian Government. The 2025–26 Queensland Budget commits A$4.7bn toward implementing the 2032 Delivery Plan, with A$417m forecast for venue delivery in 2026–27 alone. This figure is separate from the far larger transport and enabling-infrastructure program — including the Bruce Highway upgrade (over A$9bn, 80% federally funded) and the Coomera Connector — sitting within a wider A$41.7bn Transport and Main Roads budget framed around the Games. Because venue and transport budgets are reported separately, the headline A$7.1bn figure understates total Games-related capital exposure.


4. Cost Risk Analysis

4.1 Contingency sized against the wrong distribution

Queensland's program, in line with global norm, is understood to carry contingency in the order of 10–15% per project. Flyvbjerg's research indicates this is the wrong order of magnitude for a fat-tailed risk: the historical Olympic mean overrun (172%) is more than ten times a typical contingency allowance, and even the more disciplined Paris 2024 Games (115%) would have overwhelmed it several times over.

4.2 Reversal and rework costs

The Gabba reversal is a concrete illustration: an independent technical assessment found that delay and indecision alone — separate from any construction cost — would cost approximately A$1.1bn in industry escalation. Reopening scope decisions after significant sunk design and approval cost (as occurred with the Gabba and, briefly, Victoria Park) is itself a distinct and quantifiable cost driver.

4.3 Market heat and labour cost

Queensland construction activity is forecast to grow from roughly A$53bn (2024–25) to A$77bn (2026–27), a 45% increase driven substantially by the Games program landing on top of an already-strained pipeline. Construction wages have already risen 4.2% year-on-year, and industry bodies forecast a shortfall of up to 46,000–50,000 workers around 2026–29. Tight labour markets during peak construction years translate directly into cost escalation on projects still to be tendered.

4.4 Precedent from adjacent infrastructure

Cross River Rail — enabling rail infrastructure in the same construction market, though not a Games venue — has moved from a 2019 estimate of A$6.9bn to a 2025 reported cost exceeding A$19bn, an increase on the same order as Flyvbjerg's 172% Olympic average. It demonstrates that South East Queensland's construction market is already producing overruns consistent with the historical Games base rate, independent of Olympic-specific pressures.

5. Schedule / Time Risk Analysis

5.1 Immature scope this late in the program

The Queensland Audit Office's Major Projects 2025 report found that, as at 30 June 2025, 11 of the 17 Games venues were still moving through detailed business-case processes, with the remaining 6 in early procurement. With roughly six years left to the Games and typically two to four years of construction plus a buffer for test events required per major venue, the window for further scope change without schedule pressure is narrowing.

5.2 Capital spend profile is still front-loaded into the future

The QAO also found that the share of total estimated project cost sitting more than 12 months in the future rose from 50% in 2021–22 to 71% in 2025–26. Most of the program's cost and schedule exposure has not yet been incurred or locked in — meaning most of the risk, both cost and time, is still ahead rather than behind.

5.3 Workforce as a schedule constraint, not just a cost one

The same labour shortfall that drives cost escalation (Section 4.3) is also a direct schedule risk: a shortage of skilled trades at the peak of the program (forecast 2026–29) can delay critical-path venue and transport works regardless of available funding.

5.4 Interdependency and cascading delay

Venues, athlete villages (Brisbane Showgrounds, Royal Pines Resort, Maroochydore) and enabling transport (Cross River Rail, Coomera Connector, Bruce Highway works, Brisbane Metro expansion) are interdependent. Delay in any one enabling project — particularly transport connections to venues — has the potential to cascade into Games-readiness risk even where the venue itself is on schedule.

6. Consolidated Risk Register

Risk

Category

Likelihood

Impact


Fat-tailed historical overrun pattern for Olympic Games (avg. +172% real cost, every Games since 1960 over budget)

Cost

High

Very High


Standard 10–15% contingency provisioning proves inadequate against a fat-tailed cost distribution

Cost

High

High


Governance instability / scope resets (2024 change of government, Games Independent Infrastructure and Coordination Authority created, 100-Day Review)

Both

Realised; recurrence Medium

Medium–High


Venue scope and business cases still immature (11 of 17 venues in business case, 6 in early procurement, as at Jun 2025)

Both

High

Medium–High


Construction labour shortage (forecast peak shortfall 46,000–50,000 workers, c. 2026–29)

Both

High

High


Input cost / market escalation as Qld construction activity grows ~45% (A$53bn to A$77bn, 2024–27)

Cost

High

Medium–High


Local precedent of extreme overrun on adjacent enabling infrastructure (Cross River Rail)

Cost

Medium (analogous)

High


Fixed A$7.1bn venues funding envelope vs demonstrated pattern of scope creep

Cost

Medium

High


Compressed critical path as test-event and Games-ready deadlines approach (c. 2029–31)

Schedule

Medium, rising over time

High


Interdependencies across venues, villages and transport enabling works causing delay cascades

Schedule

Medium

Medium–High



7. Recommendations

  • Apply reference class forecasting — using the actual outturn costs of prior Games and comparable Australian megaprojects, not bottom-up estimation alone — to every remaining venue and precinct business case, as Flyvbjerg and Kahneman recommend.

  • Re-size contingency to reflect a fat-tailed distribution rather than a flat 10–15% allowance; consider scenario or Monte Carlo-based contingency bands anchored to the historical 172% mean and the more recent 115% (Paris 2024) outturn.

  • Lock design and scope early per venue and treat any future reopening of a settled decision as a named, quantified cost and schedule risk in its own right, given the Gabba precedent.

  • Publish a single, consolidated Games-related capital cost figure spanning venues, villages and enabling transport, rather than reporting the A$7.1bn venues envelope in isolation, so total exposure and cross-project risk transfer are visible.

  • Fund and sequence a dedicated construction workforce pipeline (training places, visa settings, staged program sequencing) ahead of the 2026–29 shortfall peak, rather than absorbing labour scarcity as cost escalation after the fact.

  • Maintain independent, regular (e.g., six-monthly) cost and schedule assurance reporting through to Games time, building on the Queensland Audit Office's existing Major Projects review cycle.

8. Sources


 
 
 

Comments

Find us on:
In-2C-41px-R.png
  • Facebook
  • Twitter
  • YouTube
  • Instagram
bottom of page