NEXTDC's 44% plunge shows grid access is the new limit on AI data centres

The cut to NEXTDC's forecasts shows that a threat often dismissed as hypothetical has become real: data-centre build speeds are constrained by grid connections and community resistance rather than by demand from customers. The implications are not confined to Australia, because operators and AI cloud providers around the world rely on utility companies and planning bodies that cannot keep up with hyperscaler capital spending. A similar concern appears in Anthropic's draft IPO prospectus, reported this week, which says opposition to data centres is growing more coordinated across countries. Investors could respond by attaching a bigger discount to capacity that is contracted but not yet delivered, especially when new grid hook-ups are required.

NEXTDC had contracts and clients in hand but no electricity supply, and the 44% drop in its shares demonstrates that the AI expansion now advances only at the pace permitted by the power grid and the local council.

Summary:

• NEXTDC's shares dropped 44% shortly after trading began once the company cut its guidance for fiscal 2027.
• Guidance for underlying EBITDA was trimmed to A$245 million to A$265 million from A$385 million to A$410 million, while net revenue guidance was revised down to A$475 million to A$500 million from A$615 million to A$640 million.
• The downgrade was triggered by hold-ups in Jemena Electricity Networks' grid works for the M3 Melbourne data centre; work stopped in September due to community opposition, safety issues and the lack of council approval.
• Work is unlikely to resume before February 2027, with additional grid supply now anticipated in FY28; the contracts involved had been worth roughly A$140 million in the earlier guidance.
• All new projects and land purchases have been halted, and FY27 capex guidance was reduced to A$4.5 billion to A$5 billion.
• NEXTDC said it held about A$8.7 billion in liquidity, including about A$1.3 billion in cash, and stays within its debt covenants.

Electricity supply has become a binding constraint on data-centre construction, after Australian operator NEXTDC cut its earnings forecast because power for a big Melbourne facility will now arrive a year later than planned.

After NEXTDC reduced its fiscal 2027 underlying EBITDA guidance to A$245 million to A$265 million from A$385 million to A$410 million, its shares tumbled 44% in early trading. Net revenue guidance was also cut, to A$475 million to A$500 million from A$615 million to A$640 million.

The issue is not a lack of demand. Customer contracts still cover the capacity at the M3 Melbourne site. But work by Jemena Electricity Networks on the grid was suspended in September because of opposition from the community and stakeholders, safety worries and the absence of council consent while more consultation is carried out. Chief executive Craig Scroggie said Jemena did not expect work to restart before February 2027, which moves the next increase in grid supply for M3 to fiscal 2028.

The delay pushes back the delivery and billing of contracted capacity that had added about A$140 million to both revenue and EBITDA in the previous forecast. The contracts contain service-level credits triggered by delays and, in some instances, rights to terminate.

Planning approval is also behind schedule. A decision by the Victorian government on later phases of the M3 project is now not anticipated until 2027; the state enters caretaker conventions on 3 November before its 28 November election.

All new development projects and land acquisitions have been paused at NEXTDC, with spending directed at capacity due in the next 12 to 18 months, and the board will weigh selling development sites that are not required soon. Capex guidance for fiscal 2027 was cut to A$4.5 billion to A$5 billion, from A$5.25 billion to A$5.75 billion. NEXTDC said its liquidity stood at about A$8.7 billion on 30 September and it remains in compliance with its financial covenants.

The episode points to a risk that reaches beyond any single company or city. As AI drives record spending on computing capacity, the rate of delivery increasingly hinges on utilities, planners and local communities. Anthropic's draft IPO prospectus, reported this week, flagged more organised and growing political resistance to data centres as a business risk. NEXTDC's downgrade indicates investors may have to factor that risk into contracted capacity across the industry.