AI Data Centres Energy Costs in the US: Policy Response and Microsoft Nuclear Deal

US President Donald Trump says Microsoft will roll out "major changes" within the week so power demand from its AI data centres does not push up household electricity bills. The comments follow rising public concern about energy prices, which have become a key political issue for voters ahead of the midterm elections in the United States.

Earlier analysis shows energy demand from AI infrastructure has already influenced retail tariffs in several parts of the country. Power bills have increased in at least 13 US states, with average residential electricity prices up around 6% year-on-year. Some regions, including Maine, have reported steeper jumps, with peak increases reaching 36% for consumers.

Measure	Value
States affected	13+
Average price rise	~6% year-on-year
Peak regional increase	36% (Maine)

Trump linked the issue directly to technology firms on Truth Social. Trump posted that "big Technology Companies who build them must 'pay their own way.'" Trump added: "I never want Americans to pay higher Electricity bills because of Data Centers." The remarks match a broader message that high‑usage facilities should not transfer extra costs to households.

Microsoft has turned to nuclear generation to help meet rising power needs from AI data centres and cloud operations. In 2024, Microsoft signed a 20-year agreement to purchase electricity from the Three Mile Island plant in Pennsylvania. The Trump administration supported this plan with a $1 billion federal loan in November 2025, signalling policy backing.

The reactor scheduled to restart at Three Mile Island is separate from the unit involved in the 1979 incident. The unit is expected to resume operations by 2027 and supply enough electricity for about 800,000 homes. Output from the plant is also planned to support Microsoft's own energy requirements linked to expanding AI workloads and other services.

Microsoft has also adjusted its site plans after local pushback over AI data centres and their possible effect on grids and tariffs. The company cancelled a proposed facility in Caledonia, Wisconsin, following opposition from nearby residents, who raised concerns about future electricity bills and system strain on local infrastructure.

During a September town hall in Wisconsin, Microsoft president Brad Smith told attendees: "I just want you to know we are doing everything we can... so that you all don't have to pay more for electricity because of our presence." The assurance underlined the company’s need to address public concern in host communities.

Broader industry response to AI data centres energy costs

Trump has indicated that additional commitments from other technology groups are likely, extending beyond Microsoft. Meta, Amazon and Google have already given similar pledges that they will cover AI data centres' costs themselves. These statements come as pressure builds from consumers in several American regions over higher utility bills linked to large data infrastructure.

The administration has simultaneously worked on other parts of household budgets, reflecting how living costs shape voter sentiment. Policy efforts include attempts to push down mortgage rates and lower prices of prescription medicines, including Ozempic. Trump’s position on AI data centres fits within this wider economic agenda focused on limiting everyday expenses for families.

Energy demand from AI data centres is therefore now tied closely to national political debate, corporate planning and regional power markets. Microsoft’s nuclear power deal, the Caledonia decision and promises from Meta, Amazon and Google together show how technology firms are adjusting strategies as they face concerns over tariffs, grid reliability and household energy affordability.