How Data Center Size Affects Insurability
Discover how size impacts data center insurability and what industry professionals need to know!
The data center industry has spent years chasing scale. Bigger campuses, higher power densities, more racks, more redundancy. But as these facilities push into gigawatt territory and multi-billion-dollar valuations, a quieter problem has been building: the insurance market wasn't designed for assets this large.
Marsh executives put it plainly — data centers are insurable, but size and scale pose real challenges. That's not a disclaimer buried in fine print; it's a signal that the industry's explosive growth is outpacing the risk frameworks meant to protect it.
What "Insurability" Actually Means for a Data Center
Insurability isn't binary. It's not a question of whether a carrier will write a policy — it's a question of whether the coverage available actually reflects the real exposure, at a price that makes economic sense, with terms that hold up when something goes wrong.
For a standard commercial building, this is straightforward. For a hyperscale data center processing billions of transactions per day, it gets complicated fast.
The core challenge is that data centers carry several distinct risk layers simultaneously — property, equipment breakdown, business interruption, cyber liability, and increasingly, third-party dependency risk tied to power grids, cooling infrastructure, and network connectivity. Each of those layers has its own underwriting logic. Stacking them on a single facility that costs $500 million to $2 billion to build creates an aggregation problem that many carriers simply aren't equipped to absorb alone.
Insurability also depends on predictability. Actuaries need historical loss data to price risk accurately. The hyperscale data center as a building typology is barely two decades old. The industry is still generating the loss history that insurers need to feel confident. That informational gap translates directly into coverage limits, exclusions, and premium loads that sophisticated owners find frustrating.
The Scale Problem Is Getting Worse Before It Gets Better
A decade ago, a large data center was 10–20 megawatts. Facilities pushing 100 MW were rare. Today, single-campus projects routinely exceed 500 MW, and the hyperscalers — Microsoft, Amazon, Google, Meta — are announcing gigawatt-scale campuses that would have seemed implausible five years ago.
This isn't just a bigger building; it's a categorically different risk profile.
When a single facility represents $1 billion or more in insured value, no single carrier is going to absorb that exposure. The risk gets syndicated across multiple insurers in a layered tower structure — which works, but introduces its own complications around coverage consistency, claims coordination, and the willingness of excess layer carriers to follow the lead of primary insurers when a major loss occurs.
There's also the business interruption dimension, which may be the most significant exposure of all. A hyperscale data center taken offline for 72 hours isn't just a hardware repair problem. Depending on the workloads running — financial clearing, healthcare records, AI training pipelines — the downstream economic impact can dwarf the property damage itself. Quantifying that exposure precisely enough to write a meaningful policy is genuinely difficult. Many business interruption policies are written on a daily revenue basis, but the cascading customer penalties, SLA breaches, and reputational damage don't map neatly onto that framework.
The Cooling and Power Problem
One underwriting headache that doesn't get enough attention: modern high-density AI workloads are pushing power usage to levels that strain facility infrastructure in ways operators didn't anticipate when the buildings were designed. A data center originally engineered for 10 kilowatts per rack is now being asked to handle 40, 60, even 100 kW per rack with liquid cooling retrofits.
That physical stress on aging electrical and mechanical systems is an underwriting red flag. Insurers who wrote policies based on original design specifications may find themselves looking at a materially different risk profile when it comes time to renew — and the carriers know it.
Risk Management Is the Price of Admission
The facilities that attract the broadest, most competitive insurance coverage aren't necessarily the newest or the most expensive. They're the ones with the most mature risk management programs.
That means documented maintenance schedules, third-party audits, redundant systems that are actually tested (not just installed), and meaningful root cause analysis after any incident — whether it results in a claim or not. Insurers are increasingly asking for this documentation as part of the underwriting process, not as an afterthought.
Identifying hidden risks before a carrier does is one of the most valuable things a data center operator can do. The discovery of a material risk during underwriting, rather than before it, is expensive — it shows up in exclusions, sublimits, and premium surcharges. Operators who can demonstrate that they've already identified, quantified, and mitigated a risk are in a fundamentally stronger negotiating position.
Specific areas that underwriters scrutinize: single points of failure in utility power feeds, geographic exposure to wildfire, flood, or seismic risk, diesel generator fuel supply chain reliability, and cybersecurity posture affecting physical infrastructure controls. The last one has grown significantly — operational technology (OT) systems that manage cooling, power distribution, and physical access are increasingly connected, and that connectivity creates attack surfaces that traditional property insurers weren't originally pricing.
A best practice that's gaining traction: tabletop exercises that simulate major loss scenarios specifically designed to stress-test both the operational response and the insurance program. You want to find the gaps in your coverage before an actual event does.
Where the Insurance Market Is Heading
The data center insurance market is under pressure from two directions simultaneously. On the demand side, the capital flowing into AI infrastructure buildout is creating a wave of new facilities that need to be insured, many of them larger and more complex than anything previously underwritten. On the supply side, reinsurance capacity — the backstop that allows primary carriers to take on large risks — has tightened meaningfully following a run of catastrophic loss years globally.
The result is a market where data center operators increasingly need to think like risk capital partners, not just buyers of insurance products.
Captive insurance structures, parametric coverage for specific perils like power outages, and multi-year policy agreements are all gaining traction as owners of large facilities look for alternatives to the standard annual renewal cycle. These tools exist in other capital-intensive industries — offshore energy, aviation, large industrial — and the data center sector is beginning to borrow from that playbook.
Parametric coverage deserves particular attention. Rather than requiring proof of loss after the fact, parametric policies pay out when a defined trigger condition is met — say, grid power interruption exceeding a specific duration. For an asset where business interruption is the primary exposure, the speed and certainty of a parametric payout can be worth the basis risk involved.
Technological transparency is also reshaping underwriting. Continuous monitoring systems that feed real-time operational data — temperature, humidity, power draw, UPS status — are starting to be treated as underwriting inputs, not just operational tools. A facility that can demonstrate 99.9999% uptime with sensor-backed historical data is a materially different risk to an insurer than one relying on self-reported maintenance logs.
What Smart Operators Are Doing Now
The operators navigating data center insurability challenges most effectively share a few common traits. They engage their insurance brokers early in the development cycle, not when construction is nearly complete. They invest in loss control programs that generate the documentation carriers actually want to see. And they don't treat insurance as a commodity procurement exercise — they treat it as a risk capital strategy.
For anyone developing, acquiring, or financing large data center assets, the takeaway is direct: the insurability of your facility is a function of how well you understand and can communicate your own risk profile. Carriers can't price what they can't see. The more clearly you can demonstrate your risk management posture — before underwriting, not during it — the better your coverage terms will be.
The data center buildout isn't slowing down. The insurance market will adapt, as it always does. But the window where operators can gain a real competitive advantage through superior risk management is open right now — and it won't stay open forever.
Explore our marketplace for more insights and resources!