The headline number sounds straightforward: $25 billion. That’s what the US Department of Defense told Congress it has spent so far on the ongoing conflict with Iran. But beneath that div lies a growing debate in Washington, and among defense experts—about what’s actually being counted and what’s being left out.

According to reporting by Bloomberg, analysts and lawmakers argue the true cost could be significantly higher, with some calling the Pentagon’s estimate a “narrow accounting” that omits major expenses.

What Does the $25 Billion Include?

At its core, the Pentagon’s div focuses on direct, immediate war costs. These include:

• Munitions used in combat operations
• Operational costs for deployed forces
• Some equipment losses and replacements

During a congressional hearing, acting comptroller Jules Hurst confirmed that the estimate reflects “used munitions and operational costs” but did not provide a detailed breakdown.

A Partial Cost Picture

Independent estimates suggest that even within this narrow scope, costs are already substantial:

• Around $8 billion in munitions
• Roughly $5 billion to replace damaged aircraft and equipment
• About $1 billion for naval operations, including aircraft carriers and destroyers

That alone brings a partial total to roughly $14 billion—over half the Pentagon’s reported div.

Why Experts Call It “Narrow Accounting”

Critics argue the $25 billion div excludes several major cost drivers that typically define the true price of war.

Key Missing Components

Analysts point to at least four major omissions:

• Infrastructure damage: Repairs to US bases in West Asia were hit during the conflict
• Pre-war mobilization costs: Expenses incurred before the official start date (February 28)
• Naval blockade operations: Ongoing costs of maintaining strategic control in the region
• Fuel and logistics inflation: Rising energy and supply chain costs

Stimson Center senior fellow Kelly Grieco described the estimate as incomplete, noting that it leaves out “broader operating costs and rising fuel expenses.”

The Munitions Problem

The Center for Strategic and International Studies has suggested that munitions alone could eventually cost as much as $25 billion—effectively matching the Pentagon’s entire reported total.

That raises a critical question: if one category could equal the full estimate, what does the real total look like?

How Much Could the War Actually Cost?

Some lawmakers believe the real div is far higher—and rising fast.

Senator Richard Blumenthal said he had previously been briefed on estimates of $2 billion per day, calling even that a “low-ball div.”

If accurate, that would imply:

• ~$14 billion per week
• ~$60 billion per month

Even if those numbers fluctuate, they suggest the Pentagon’s $25 billion div may represent only a snapshot—not the full financial trajectory.

Historical Context Matters

For perspective:

• The Iraq War cost the US over $2 trillion (long-term)
• The Afghanistan War exceeded $2 trillion as well

Compared to those conflicts, $25 billion seems modest—but early estimates in past wars also dramatically underestimated long-term costs.

What’s Happening on the Ground and Why Costs Are Rising

The financial debate comes as military planning intensifies.

The US Central Command (CENTCOM) is preparing to brief Donald Trump on expanded military options. These reportedly include:

• Strikes on Iranian infrastructure
• Potential control of the Strait of Hormuz
• Continued naval deployments

Vice President JD Vance has also warned about “intelligence optimism”—a term used when early assumptions underestimate the scale or duration of a conflict.

That warning carries financial implications. Wars that last longer than expected almost always cost more than projected.

Why the Cost Debate Matters

This isn’t just an accounting dispute—it has real policy consequences.

Budget Pressure

The debate unfolded during hearings on a proposed $1.5 trillion defense budget, where lawmakers questioned whether:

• The US can sustain a prolonged military engagement
• Weapons stockpiles are being depleted too quickly
• Additional funding requests are inevitable

Defense Secretary Pete Hegseth faced pointed questions but declined to estimate the war’s total cost or duration.

Public Transparency

Cost transparency shapes public support. When numbers appear incomplete or inconsistent, it can:

• Undermine trust in official reporting
• Complicate congressional oversight
• Influence voter sentiment

Strategic Trade-Offs

Every dollar spent on war is a dollar not spent elsewhere. Analysts often frame this in terms of opportunity cost:

• Domestic infrastructure
• Healthcare
• Education
• Debt reduction

Understanding the true cost helps policymakers—and the public—evaluate those trade-offs.

The Bigger Picture: How Wars Get Underpriced

This situation reflects a broader pattern in US military history.

Common Reasons War Costs Are Underestimated

• Optimistic timelines: Conflicts are expected to end quickly
• Narrow definitions: Only immediate costs are counted
• Deferred expenses: Long-term care, reconstruction, and interest are excluded

Economists often distinguish between the following:

• Direct costs: Weapons, operations, logistics
• Indirect costs: Veterans’ care, economic disruption
• Long-term costs: Interest on borrowed funds

The Pentagon’s $25 billion div appears to fall squarely in the “direct costs” category—leaving out much of the bigger picture.

TL;DR

• The Pentagon says the US has spent $25 billion on the Iran war
• Experts argue this is a limited estimate that excludes major costs
• Independent analyses suggest real expenses could be far higher
• Lawmakers warn daily costs may reach billions
• The debate highlights how war costs are often underestimated early on