Start here: the basics in plain English

What a data center is

A data center is an enormous windowless building filled with computers. Not a few computers. Tens of thousands of them, stacked in rows like library shelves, running twenty four hours a day, every day.

Those computers run the internet. When you stream a movie, check a bank balance, or ask an AI a question, a computer inside a building like this is doing the work.

Two facts about them drive this entire debate:

• They eat enormous amounts of electricity. One large data center can use as much power as a small city.
• They employ very few people. Once the building is finished, it mostly runs itself. A building the size of several football fields might have a few dozen permanent employees.

That combination, huge power use and tiny headcount, is unusual. A steel mill uses a lot of power but employs thousands. A law office employs hundreds but uses almost no power. Data centers sit at one extreme, and that is why the normal rules of thumb about "attracting a big employer to town" do not apply cleanly here.

How your electricity bill actually works

This one matters most, so take your time here.

The power company spends money on two things: power plants, which make electricity, and wires, which carry it to you. Building both is expensive.

The power company is not allowed to just pick its own prices. A government referee, usually called a utility commission, reviews the company's spending and decides how to divide it up among all the customers.

Here is the key idea. The referee sorts customers into groups. Homes are one group. Small businesses are another. Big factories are another. Each group gets its own pricing, because each group costs a different amount to serve.

Now imagine a gigantic new customer shows up and says it needs as much power as a small city. The power company has to build new plants and new wires to serve it. That costs billions. The whole fight is over who pays for those billions.

• If the new customer pays the full cost, nobody else's bill changes.
• If the new customer pays only part of it, the rest gets spread across everyone else's bill. That is called cost shifting, and it is the single biggest accusation in this debate.

Think of a group dinner. Ten people order salads. One person orders lobster and three bottles of wine. When the check comes, do you split it evenly, or does the lobster person pay for the lobster? Splitting it evenly is cost shifting. The entire argument is whether data centers are paying for their own lobster.

Two more terms you will hear. They sound similar and they mean different things:

• Who caused the cost. Who ordered the lobster.
• Who gets billed for it. How the check gets split.

These are not the same question, and both sides lean on that gap. Remember the dinner and you will never get lost.

What a "capacity auction" is, and why it made prices explode

This sounds technical. It is not.

The electric grid has to be ready for the single worst day of the year, usually the hottest afternoon in August when every air conditioner in the region runs at once. On that one day, demand spikes.

So the grid operator pays power plants to promise to be available, whether or not they end up running. It is a standby fee. Think of paying a babysitter a retainer to keep Saturday open, even if you end up staying home.

Those standby promises get bought at an auction. More expected demand means a higher price, and everyone's bill reflects it.

Here is why this matters. Data centers are being announced faster than power plants are being built. The auction saw demand jumping while supply did not keep up, and the price went from $28.92 to $329.17 for the same standby promise.¹⁸ More than ten times higher. Everyone in that region pays it, including families who have never heard of a data center.

What those dollar figures actually are. That $28.92 and $329.17 is not anyone's bill. It is the wholesale standby price: what one megawatt of power plant capacity gets paid per day just to stay ready. Your utility buys standby for all its customers at that price, then folds the cost into everyone's bills. So the tenfold jump does not make home bills ten times higher, because standby is only one slice of a bill, roughly a tenth to a quarter depending on your utility. But it is a real slice. When the price spiked, New Jersey's own state auction translated it into residential increases of about 17 to 20 percent for the year, which on a typical bill is in the neighborhood of $25 a month.²⁷ PJM's own gentler estimate was 1.5 to 5 percent in some states.²⁷ The honest summary: somewhere between a few dollars and about $25 a month per household, depending on the state, every month, for something invisible.

The other side has a real answer to this, and it depends on the dinner distinction above. Ordering the lobster and splitting the check are different steps. Keep that in your pocket, because both sides need it.

How local taxes and "tax breaks" work

When a company puts up a big building in your county, it pays property tax on it. Big building, big tax bill, and that money funds schools, police, and roads. This part is real and it is large.

But states compete to attract these buildings. So they offer tax exemptions: build here, and you will not owe sales tax on all those computers.

Important: this is not the state writing a check. It is the state choosing not to collect money it otherwise would have. The effect on the budget is identical. Less money comes in.

So there are two separate questions, and people constantly mix them up:

1. Does the county collect a lot of property tax from the finished building? Often yes, sometimes a great deal.
2. Did the state give away a lot of other tax money to get it? Often yes, sometimes more than it got back.

You can honestly argue either side depending on which of those two you weigh more heavily.

What "flexible load" means

The grid is built for that one worst day. Like a highway built wide enough for the worst traffic jam of the year. Which means that most of the time, there is empty road.

So researchers asked a good question: what if a data center agreed to ease off during the few busiest hours? Then it could use all that empty road the rest of the year without anyone having to build new lanes. New lanes are the expensive part.

That is "flexible load," and it is the strongest argument the pro side has. The catch, and it is a real catch, is that agreeing to ease off is currently voluntary. Most contracts do not require it.

What "who holds the risk" means

A power company builds a billion dollar plant for a data center. Then the data center cancels, or shrinks, or goes bankrupt.

Somebody still has to pay for that plant. It exists. It cost real money.

If the contract says the data center pays regardless, the company holds the risk. If it does not, the cost lands on everyone else's bill. The good version is called a minimum take contract: you reserved the table, you pay for the table, whether or not you show up.

One unit you need

Electricity gets measured in terawatt-hours, written TWh. Treat it like a gallon. It is just a unit of measurement. One terawatt-hour is roughly what 95,000 American homes use in a year. When you see "192 TWh," read it as "a very large amount, and here is the yardstick."

That is everything. Every argument below is about power bills, the grid, taxes, water, air, or who got asked. You now know enough for all of it.

Part 2

What both sides already agree on

Do not waste time fighting these. Conceding them early makes you look honest and buys credibility for the fight you actually want.

Read that table twice. Both sides accept every line. Roughly a tenth of the nation's electricity, a real economic contribution, benefits concentrated in the construction phase, and costs that spill onto other customers. The debate is entirely about what you should do about it.

Berkeley Lab is Lawrence Berkeley National Laboratory, a research lab run for the U.S. Department of Energy. It produces the official federal count. Virginia's watchdog is JLARC, the Joint Legislative Audit and Review Commission, the state legislature's nonpartisan investigative agency. Neither takes a side, which is exactly why both camps quote them.