Last legislative session, Missouri lawmakers took a swing at addressing anxiety over data centers increasing electricity rates with the passage of Senate Bill (SB) 4. This bill requires that customers with loads over 100 megawatts (MW) pay their share of costs associated with connecting to the regulated grid (the Missouri Public Service Commissions recently expanded that rule to 75 MW). For reference, 100 MW is roughly equivalent to the electricity needs of 80,000 U.S. households.
There has been confusion about whether average Missourians’ rates would increase due to data centers. It’s understandable that people might be confused about some language in the bill. For example, what exactly does “any unjust or unreasonable costs arising from the service to such customers” or “pay their share of costs” mean?
A recent hearing at a St. Louis Board of Alderman committee meeting brought some needed clarity to the matter. When questioned, Ameren’s manager of economic development clarified that “all Ameren customers, including residential customers, pay for expanding the grid through building new power plants through rate increases, and that may be needed to accommodate large-load customers.”
In plainer English, average Missouri ratepayers would pay for new power plants constructed to meet data center demand—which could be a hefty bill if Missouri does indeed need new power plants.
Major technology companies (Amazon, Google, Meta, Microsoft, xAI, Oracle, and Open AI) are meeting with President Trump to sign a pledge that they will supply and pay for their own power for artificial intelligence data centers.
So average Missourians won’t be paying for new data centers at all?
Potentially, but it depends on the deal that is finalized with the major tech companies.
While there is some uncertainty about who will pay for what, Missouri could bring clarity by allowing consumer-regulated electricity (CRE).
CRE offers a private, parallel pathway to energy abundance, and gives data centers a private partner (CRE utility) to meet their own energy needs with less red tape, more certainty, more control, and more freedom to innovate. A CRE utility would develop and operate generation on behalf of large-load customers that prefer not to own and operate power plants themselves.
SB 4 was a good start, but Missouri can go further in protecting ratepayers and attracting investment. Allowing CRE could create a clear, structural pathway that could not only further protect ratepayers, but also provide attractive, tangible benefits to the developers paying for their own energy needs.
