If you want a single number that captures how fast the AI boom is reshaping commercial insurance, try this one: Aon has more than tripled the capacity of its dedicated data centre insurance programme in just over a year, taking it from US$1.5 billion (A$2.1 billion) at launch to US$5 billion by mid-2026. That's not a niche product growing quietly in the background. It's one of the fastest-scaling corners of the entire commercial property market, and Australian and Asia-Pacific brokers are being asked to find capacity for it.
Speaking at the Rendez-Vous de Septembre reinsurance gathering in Monte Carlo this month, Fitch Ratings' head of EMEA reinsurance ratings, Manuel Arrivé, told delegates that data centres represent a major growth opportunity for the re/insurance sector as a whole. But he was careful not to oversell it.
"The potential is huge. But also the risks are there," Arrivé said, pointing to accumulation risk and the modelling challenges that come with insuring assets of this size and complexity. "There's accumulation risk leading to modelling risk, and reinsurers tend to be cautious at this stage."
That caution matters, because it shapes where the capacity ends up coming from. Arrivé said the market can't rely on traditional reinsurance alone, it will need contributions from primary insurers, sidecars, catastrophe bonds, and captives.
Arrivé argued that the sheer scale of data centre investment, combined with softening conditions making risk retention less attractive for captives in other lines, could push more businesses toward using captives for this exposure.
"The large need for reinsurance in that area could favour the development of captives, even with just the scale of the investments and the scale of the need for reinsurers," he said.
It's a pattern the industry has seen before - Fitch drew a direct comparison to how the market adapted to earlier waves of technological change. "The industry will adapt, like they did during jumps in technology or for nuclear plants as well," Arrivé said. "They faced the same challenges, and they managed to fill the gaps."
The numbers behind the boom
The scale driving all of this is huge. Aon's own data cites capital spending by the five biggest hyperscalers forecast to exceed US$600 billion in 2026 alone, which is a 36% jump on the prior year. Roughly three-quarters of that is tied to physical AI infrastructure. Individual construction costs for a single site can run to US$20 billion before any technology is even installed. Lenders financing these projects are increasingly demanding full replacement-value cover as a condition of finance, which is part of why insurers are being asked to stretch capacity so quickly.
A Fitch-referenced estimate from the Swiss Re Institute put global insurance premiums tied to data centres at roughly US$91 billion by 2030, though I'd treat that particular figure as indicative rather than confirmed, since it comes to us secondhand via conference reporting rather than the original Swiss Re publication.
A separately reported Swiss Re estimate has global data centre premiums closer to doubling from US$10.6 billion to US$24.2 billion by the same year, a reminder that different reports may be measuring different things, and it's worth checking the primary source before quoting either figure with confidence.
Closer to home, Allianz Commercial has warned that Asia-Pacific's data centre capacity is projected to more than triple by 2030, but that much of the fastest-growing capacity, particularly in Malaysia, sits in markets already exposed to heat and drought stress. Around 79% of global data centre capacity, Allianz found, is located in areas with heightened natural catastrophe risk. For underwriters, that means the data centre opportunity and the data centre accumulation problem are, in many cases, the same set of assets.
For Australian brokers, three things are worth watching:
Read next: Captive insurance premiums hit US$79 billion as growth defies softening market
As long as AI investment keeps driving hyperscale construction at this pace, expect data centre capacity, and the captive structures increasingly used to support it, to remain one of the more closely watched growth stories in commercial insurance.
