Power & Grid

AI Data Centers Are Showing Up on Your Power Bill

AI-caused and community-felt. Here is what the data actually shows.

Last updated: 30 June 2026

If you live in western Maryland, about $18 of your monthly power bill now traces to something you will never see: a windowless building full of humming computers, many of them training and running AI. In the largest US power grid, the people who referee the market say data centers piled roughly $9.3 billion onto customers' costs in a single year. That is the AI boom, arriving quietly as a line you already pay. As of 30 June 2026, though, the full story is stranger and more contested than the angry headlines let on.

Figures labeled projection are forecasts not yet built. Figures labeled claim come from an interested party and are not independently audited.

What PJM actually is, and how this works

PJM is not a company or a data center. It is the grid operator for 65 million people across 13 states plus Washington DC: Pennsylvania, New Jersey, Maryland, Delaware, Virginia, West Virginia, Ohio, Indiana, Illinois, Michigan, Kentucky, Tennessee, and part of North Carolina. If you live in one of those states, PJM is the system keeping your lights on, whether you know its name or not.

Here is the part that matters. Once a year, PJM runs an auction. It is not data centers bidding against homeowners. It is power plants bidding against each other, competing to be paid for promising they will have electricity ready when the grid needs it most. PJM picks enough plants to cover demand, and the price those plants clear at becomes the price every utility in that zone pays for that capacity.

Data centers do not get billed for that price separately. Households do not get spared from it either. Once the auction clears, that price gets folded into the regular rates utilities charge everyone in the region: residential customers, hospitals, factories, all of it. So when a wave of new data center demand pushes the auction price up, as it did when PJM's price went from $28.92 to $329.17 per megawatt-day in two years, that cost does not land on a bill marked "AI." It lands on everyone's regular electric bill, spread across the whole zone.

That is why the $9.3 billion figure translates into a flat monthly bump, about $18 in western Maryland, $16 in Ohio, rather than a line item anyone can point to. It is baked into the rate, not itemized. And it is specific to PJM states. Other regions run their own grids with their own auctions. South Dakota, for example, sits in MISO, the Midcontinent Independent System Operator, a separate market with its own pricing. MISO ratepayers have not seen this particular spike, though the same dynamic could play out there if data center demand in that region grew the way it has in PJM territory.

Why this didn't work like a bulk discount

It is natural to expect that buying more of something pushes the price down, the way it does at a wholesale club. But PJM's auction is not selling a product sitting in surplus. It is selling something scarce: a promise that enough power plants will be standing by the moment the whole grid needs them most. There are only so many plants that can be running at peak demand, and building new ones takes years.

So when data centers showed up wanting massive new capacity all at once, supply could not stretch to meet them. It behaved less like a bulk order and more like concert tickets: a venue with 10,000 seats does not get cheaper when 50,000 people want in. Demand crashing into a fixed supply pushes the price up, not down. That is the mechanic behind PJM's price jumping more than elevenfold in two years.

This also explains why some of the more skeptical studies further down in this story, from Berkeley Lab and USC's Shon Hiatt, found smaller or even negative price effects in places where new power supply kept pace with the new demand. When supply catches up, the scarcity goes away, and the price pressure goes with it.

The bill nobody voted for

It detonated. The retainer price went from $28.92 per megawatt-day to $329.17 in two years, more than an eleven-fold jump. PJM's independent market monitor, the referee whose job is to call the market straight, found that data centers drove about 63 percent of that jump, roughly $9.3 billion that every customer pays back through their rates, as reported by IEEFA and Utility Dive.

In plain dollars, the capacity piece alone adds about $18 a month in western Maryland, $16 in Ohio, and roughly $21 for DC's Pepco customers. And it is not done. The Natural Resources Defense Council expects a typical family in the region to pay around $70 a month extra by 2028 as demand keeps outrunning supply. Projection

Why it is gas, and why it lands on you

These buildings are hungry on a scale that is hard to picture. One data center rising in Louisiana will draw about 2.2 gigawatts, roughly twice what the entire city of New Orleans pulls on a hot day, by Energy Innovation's account. To feed that, the country is reaching for gas. Planned US gas capacity nearly tripled in 2025 to about 252 gigawatts, more than a third of it meant to power data centers on-site, per Global Energy Monitor. Projection

Here is the part that catches people out. Electricity has a quirk: in any given hour, the single most expensive plant needed to meet demand sets the price that everyone pays. That price-setting plant is usually gas, which supplies about 43 percent of US power. So when data centers gulp gas, they bid up the fuel, and the fuel bids up the electricity price for the whole neighborhood, write two experts from Energy Innovation, a clean-energy group. Claim

Some operators try to dodge the grid entirely by building their own gas plant on-site, a setup called behind-the-meter. It sounds neighborly, like they are getting out of everyone's way. The catch is that an on-site plant signs a contract with a gas supplier instead of a utility, which puts it beyond the reach of the state regulators who might otherwise make it help pay for the grid the rest of us share.

So how worried should you be

Honestly, it depends, and that is not a dodge. The most careful national estimate comes from North Carolina State University with three other schools, published in May 2026. Running the grid hour by hour across 26 regions, they project that data center and crypto demand could push electricity costs up 6 to 29 percent on average by 2030, and as much as 57 percent in the hardest-hit areas. Projection One caveat worth holding onto: that is the wholesale cost of power, not the whole bill, and it swings hard on the price of gas. See the study summary.

Now the number you have probably seen shared in fury: 267 percent. Ignore it, or at least understand it. PolitiFact traced it to wholesale prices at a few specific points on the grid, not anyone's home bill, and wholesale is only about a third to a half of what you actually pay. Real household increases from 2021 to 2026 were painful but smaller: about 94 percent in DC, 74 percent in Maryland, 73 percent in Maine, with data centers a real driver in those hot spots and a bit player elsewhere.

The twist: maybe they are the scapegoat

Here is where the story turns. A Lawrence Berkeley National Lab analysis, cited by the Congressional Research Service, found that states with the most data center growth often saw prices fall between 2019 and 2025, because all that extra electricity use spread the grid's fixed costs over more customers. A study by USC's Shon Hiatt, on RealClearEnergy, found that doubling a utility's data center load nudged residential prices up just 0.65 percent, under a dollar a month, with no real effect at the big investor-owned utilities most of us use. Claim

Charles Hua, who runs the utility watchdog PowerLines, puts it bluntly: data centers are "the scapegoat," he told Fortune, because they are the new thing everyone can see, not the main reason bills climbed. His prime suspects are dull but expensive: storms battering the grid, and utilities on a spending spree, asking for $31 billion in rate increases in 2025 alone.

What actually decides your bill

Two things, mostly. One is the price of gas, the hinge in every honest forecast: when data centers push gas demand up, the cost flows straight to the plant that sets your price. The other is the rulebook. The price caps that have been holding PJM's costs down start to expire in 2028, and more data centers are quietly building their own gas plants where regulators cannot reach them. This gets decided in fuel markets and at utility commissions, not in the chart someone angry-shared at you.

There is one more number that matters: yours. Add your bill to the survey above, and over the months ahead it will show whether reported costs are climbing or holding, wherever in the world you are reading this.

Sources

1. IEEFA, on Monitoring Analytics' PJM estimate (data center share, $9.3 billion, per-zone bill impacts), 2025.
2. Utility Dive, "Data centers 'primary reason' for high PJM capacity prices: market monitor," 2 October 2025.
3. NRDC, projected $70 per month by 2028 for an average PJM family, 2025.
4. Global Energy Monitor, "Betting big on data centers, U.S. now leads world for new gas power development," January 2026.
5. Energy Innovation, in Utility Dive, "Behind-the-meter data center gas plants will raise US energy bills," June 2026.
6. NC State et al., "Power System Costs and Emissions from Data Center and Cryptocurrency Mining Expansion in the United States," Environmental Research Letters, 18 May 2026.
7. PolitiFact, "How much have data centers increased electricity prices?", 12 June 2026.
8. Congressional Research Service R48646 (Lawrence Berkeley National Lab analysis), 12 May 2026.
9. Shon Hiatt (USC Marshall), via RealClearEnergy, 8 June 2026.
10. Charles Hua of PowerLines, via Fortune, 20 May 2026.

Last updated: 30 June 2026