No dedicated large-load tariff; policy debate currently centred on moratoria has not adopted a large-load tariff. Instead, New Hampshire is among a small group of states actively weighing a moratorium or added restrictions on new data centre development, driven by concern over electricity cost impacts on existing ratepayers rather than a cost-recovery tariff mechanism.
Also active in New Hampshire: New Hampshire ranks among the more expensive US states for electricity generally, which — combined with the moratorium debate — makes it a lower-priority near-term siting candidate for hyperscale AI loads compared to states actively courting large-load investment with defined tariff terms.
Figures compiled from the Edison Electric Institute's "Large Load Projects and Tariffs" (September 2026) member-company summary and public regulatory filings. Confirm current tariff terms directly with Eversource / Unitil and the relevant state public utility commission before relying on any figure for a capital decision.
Weighing New Hampshire against another state or a Canadian province with a different rate and interconnection picture entirely? Run both sides of the comparison through our licensed AI data centre cost configurator — it applies each jurisdiction's actual power rate, tax treatment and large-load tariff rules to the same seven build configurations.
Model This State on Your Own Site
Every figure above comes from the same power-cost and tariff dataset behind the SCR AI Build Configurator — a licensed, embeddable widget that models seven data centre build configurations against all nine Canadian provinces and all 50 US states plus DC, returning capital expenditure by line item, energy cost, revenue by commercial structure, EBITDA and payback.
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