So, how much does a military campaign cost these days? If you're talking about the U.S. operation against Iran, the answer is somewhere between "a lot" and "a staggering amount." According to Kent Smetters, director of the Penn Wharton Budget Model (PWBM), Operation Epic Fury could set American taxpayers back anywhere from $40 billion to $210 billion.

Let's break that down. Smetters gives a range. The smallest direct budgetary cost—just the military stuff—is about $40 billion. That could climb to $95 billion. The more probable figure, he says, is around $65 billion. That covers direct operations and replacing all the equipment and supplies that get used up or blown up. And that's if things wrap up in about two months. If the conflict drags on longer, well, you can imagine the meter keeps running.

But here's the kicker: that's just the direct military spending. Smetters estimates there could be another $115 billion in economic losses on top of that. We're talking trade disruptions, wild swings in energy markets, and the general financial strain that comes with a prolonged conflict in the Middle East. Add it all up, and you're looking at a total potential bill of up to $210 billion.

Now, Smetters offers an interesting counterpoint. He cautions that when we talk about the cost of war, we often forget to ask: cost compared to what? If the alternative was Iran actually developing a nuclear weapon, then the spending needed for military deterrence and maybe even rebuilding U.S. cities could have been much, much higher. It's a grim cost-benefit analysis.

This projected price tag has, unsurprisingly, kicked off a debate in Washington about spending priorities. Before the main operation even began, the Pentagon's pre-strike military buildup had already cost about $630 million, according to a report citing Elaine McCusker, a former senior budget official at the Pentagon.

Lawmakers are starting to do the math. House Democratic leader Hakeem Jeffries has criticized the Trump administration for what he sees as prioritizing military escalation in the Middle East over pressing domestic economic concerns.

Senator Chris Murphy put it in even starker terms. He argued that the financial toll of a potential conflict with Iran could actually exceed the cost of extending Affordable Care Act subsidy support. It's a direct comparison that frames the spending as a choice: missiles or medicine?

Meanwhile, President Donald Trump has signaled that the heaviest phase of the campaign against Iran is still ahead, hinting at a prolonged conflict. That suggests the financial implications—the numbers we're talking about now—could very well escalate beyond the current estimates.

So, there you have it. A military operation with a price tag that starts in the tens of billions and has a real chance of hitting the hundreds of billions. It's a number that includes jets, ships, and soldiers, but also disrupted oil tankers, volatile markets, and a political debate about what America's money should really be buying.