Uptime Institute’s eighth annual outage analysis found good news and bad news for data center operators worldwide. The good news is that outage frequency is down. The bad news is that the price tag for those outages continues to rise.
The Annual Outage Analysis 2026 report found that outage prevention remains a focus for data center operators. Driven by escalating demand growth and the need to support AI-driven workloads, modern data centers can ill afford any kind of power outage. A rack of GPUs served by liquid cooling costs a lot of money. Even a brief cooling interruption can force GPU systems to throttle or shut down, disrupting expensive AI workloads. Hence, the survey’s finding that outage frequency on a per-site basis has been declining for five straight years is welcome news.
“Outages overall have slowed down, and overall, digital infrastructure is remarkably resilient. But further resiliency gains are becoming harder to achieve,” said Andy Lawrence, founding member and executive director of Uptime Intelligence, in a press release. “We believe that over time, failures will increasingly not be the result of a single point of failure, but instead be linked to complex interactions between systems, including software, networks, and external dependencies.”
Lawrence added that the pace of improvement in outage frequency has slowed. Separately, the report found that external infrastructure failures have become more prominent, particularly in publicly reported outages. This may be indicative of a long-term trend related to the rise in fiber- and connectivity-related outage issues, which can cause extended disruptions. The report added that growth in AI workloads is likely to place greater demands on network performance.
Outage Costs Rising
Outage costs are also edging upward, according to Uptime Institute. Fifty-seven percent of respondents said their most recent major outage cost more than $100,000. One in five said costs exceeded $1 million.
Uptime attributed the increases partly to inflation, rising labor and hardware costs, service-level agreement penalties, and longer recovery times. The report said the primary factor is the increasing number of services and businesses that may depend, directly or indirectly, on a single data center or availability zone.
While fiber and connectivity concerns are growing, outage frequency continues to be dominated by power failures. These have a variety of causes, with outages related to uninterruptible power supply systems, transfer switches, and generators among the most frequent and damaging. Grid bottlenecks and high-density workloads are also introducing new pressure points.
“While site-based electrical and mechanical infrastructure remain a critical building block that needs to be resilient, digital infrastructure is becoming more distributed with outages originating outside the data center, including those tied to power availability, network connectivity or the reliance on external cloud services playing a larger role,” said Lawrence.
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Data Center Response
There is so much investment in data center operations that tolerance of the occasional outage is dwindling. Hence, operators are instituting a range of safeguards to keep their systems online.
Lawrence noted that data centers are investing in areas such as automation and control systems to manage complexity. Another approach is to conduct resiliency assessments. These have traditionally focused on internal systems, but Uptime said operators will increasingly need to assess external and systemic risks as well.
Further, data centers are being required to take more responsibility for their impact on the grid. While traditional UPS systems protected data centers from grid outages and power-quality issues, grid operators are now examining the effects that large-scale AI data centers can have on the power network. These include:
If a large AI data center trips offline or transfers to backup power because of a minor grid fault, hundreds of megawatts can suddenly disappear from grid demand. NERC has documented large-load reduction events of approximately 1,500 MW, including events involving data centers and other power-electronic loads. Such abrupt changes can affect grid frequency and voltage. In response, some data center operators are deploying battery energy storage systems to improve facility resilience and help manage interactions with the local power network.
Data centers traditionally represented a relatively stable power draw from the grid. AI training facilities, however, can produce rapid fluctuations and oscillations in electrical demand. In response, operators are adding advanced controls and power-electronics systems to protect local electrical networks from sudden changes in demand.
“The scale of modern data centers could lead to load swings of 1 GW multiple times per minute, which creates frequency variations and oscillations that the grid can’t handle,” ON.energy CTO Ricardo de Azevedo said in an interview.
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