How Much This Iran War is Already Costing Us

The Projections Are Worse Than the Reality

The Penn Wharton Budget Model has run the numbers on what a limited, two-month conflict would cost — assuming no ground invasion.

That’s $65 billion in direct costs and up to $210 billion in economic damage — for a two-month conflict that hasn’t even put boots on the ground. The White House is expected to submit a supplemental funding request exceeding $50 billion to Congress. Some of that will go to regional allies. The rest goes on the national credit card.

And here’s the part that makes the Penn Wharton projections genuinely alarming: they assume a limited conflict. Two months. No ground troops. No prolonged occupation. If any of those assumptions prove optimistic — and in the history of U.S. military engagements in the Middle East, they almost always do — the numbers above become a floor, not a ceiling.

You’re Already Paying at the Pump

Forget the Pentagon’s budget for a second. The cost you’re actually feeling right now is at the gas station. Iran’s blockade of the Strait of Hormuz — the chokepoint for roughly 20% of the world’s oil supply — blew up energy markets within hours.

• Crude oil surged from roughly $67/barrel to nearly $100/barrel, briefly breaking the $100 mark.
• Gas prices jumped from $2.98 on February 26 to $3.93 by March 21 — a 32% increase in three weeks.
• Diesel hit nearly $5 a gallon, which means everything shipped by truck — so, everything — is about to cost more.

The diesel number is the one that should scare you most. Gas prices hurt your commute. Diesel prices hurt everything else. Nearly every product in America touches a truck at some point in its supply chain. When diesel hits $5 a gallon, the cost of moving food, clothing, electronics, building materials — all of it — goes up. You’ll see it at the grocery store before you see it in the headlines. The average American household is now projected to spend an additional $740 on gasoline this year because of the price shock. That doesn’t include the ripple effects from diesel-driven inflation on consumer goods.

When asked about rising gas prices, the response from the White House was: “If they rise, they rise.” Cool.

The Economic Shrapnel Is Everywhere

Gas prices are the most visible cost. They’re not the only one. The Iran conflict has already triggered a cascade of economic damage that’s hitting your mortgage, your retirement account, and your consumer confidence:

• Consumer sentiment fell to its lowest reading of the year in March, with a sharp decline after the war began.
• The S&P 500 and Nasdaq posted their worst four-week stretch since April 2025. If you have a 401(k), you felt it.
• Mortgage rates climbed from just under 6% to 6.53% since the conflict started. That’s thousands of dollars added to the lifetime cost of a home loan.

Let’s make that mortgage number real. On a $400,000 home with a 30-year fixed rate, the difference between 6.0% and 6.53% adds roughly $130 per month to your payment. Over the life of the loan, that’s an extra $47,000. Because of a war you didn’t vote for, fought with money the government doesn’t have.

None of this shows up in the Pentagon’s cost estimates. None of it will be in the supplemental funding request. But you’re paying it anyway. And this is just the financial markets. The real-world impacts are already cascading through sectors that most people don’t think about until they feel the pinch. Travel costs are spiking as airlines pass fuel surcharges onto passengers. 

Shipping companies are rerouting around the Strait of Hormuz, adding days and dollars to global supply chains. Agricultural commodity prices are climbing because modern farming runs on diesel — from the tractors in the field to the trucks hauling produce to distribution centers.

The Penn Wharton model estimates the broader economic damage at $50 billion to $210 billion — and that range is deliberately wide because the cascading effects of energy disruption are notoriously difficult to model. What we know for certain is that the longer the Strait of Hormuz remains contested, the worse every one of these numbers gets.

The Iraq/Afghanistan Comparison Should Terrify You

Here’s the number that should keep you up at night: $8 trillion. That’s the total estimated cost of the post-9/11 wars in Iraq and Afghanistan, according to Brown University’s Costs of War Project. Not just what the Pentagon spent on bombs and tanks. The total cost — including war-related increases to the defense budget, State Department expenditures, homeland security costs, interest on war debt, and veterans’ care.

The original pitch for Iraq? Around $50 billion. The final tab? 160 times that.

And the biggest chunk hasn’t even been paid yet. The U.S. is projected to spend between $2.2 trillion and $2.5 trillion by 2050 — just on medical care and disability benefits for post-9/11 veterans. That’s not missiles or fuel. That’s the cost of taking care of the people who fought.

Now apply that framework to Iran.

We’re at $11.3 billion in six days. Projected $65 billion in 60 days. And that’s before a single long-term cost is calculated — no veterans’ care projections, no interest payments on the debt used to fund it, no accounting for the economic damage from energy disruptions. If the post-9/11 wars are any guide, the number you’re seeing right now is roughly 1% of what this will actually cost.