Dramatic fall in daily costs as US shifts munitions in Iran: $16 billion in 12 Days
March 18, 2026
The cost of the US air campaign over Iran has reached an estimated $16.5 billion by day 12, according to analysis from the Center for Strategic and International Studies (CSIS), highlighting both the scale of the opening phase and how rapidly costs decline once air dominance is established.
The figure marks a sharp increase from the $11.3 billion the US Department of Defense reported to Congress by day six, although that earlier estimate excluded the cost of equipment losses and infrastructure damage.
Separate remarks from Kevin Hassett, Director of the US National Economic Council, suggest a similar order of magnitude, with total costs put at around $12 billion at the time of his briefing.
US air campaign costs fall sharply after first three days
CSIS estimates show that the majority of expenditure was concentrated in the opening phase of the campaign.
The first day alone is estimated to have cost more than $5.5 billion, followed by approximately $4 billion on day two. By day three, daily costs had fallen below $2 billion, before dropping to the low hundreds of millions per day by days 11 and 12.
Kevin Hassett, Director of the US National Economic Council, said US military strikes on Iran have cost about $12 billion so far.
— Clash Report (@clashreport) March 15, 2026
“The latest number I was briefed on was 12.” pic.twitter.com/kjq2sJpGTe
CSIS estimate of US cost of Iran campaign by Day 6:
- Munitions: $11.3 billion
- Combat losses and infrastructure damage: $1.4 billion
- Operations and support costs: $26.5 million
- Total (inc. infrastructure damage): $12.7 billion
A major driver of falling costs has been the transition from high-end “exquisite” munitions to lower-cost precision-guided weapons.
A single Tomahawk cruise missile costs in the region of $3.5 million, while a BLU-110 bomb fitted with a Joint Direct Attack Munition (JDAM) guidance kit can cost under $100,000. Some open-source estimates place the marginal cost closer to $55,000.
🇺🇸 Joint Direct Attack Munition (JDAM) Fast Facts:
— Colby Badhwar 🇨🇦🇬🇧 (@ColbyBadhwar) March 11, 2026
JDAM is a GPS/INS guidance & tail kit for Mark 80 series General Purpose Bombs, turning them into precision guided munitions
Total US Procurement – Over ~470,000
Current production capacity – 25,000/year
Historic production… pic.twitter.com/CDlrbTelPm
This transition is typical of sustained air campaigns. Expensive, long-range munitions are used heavily in the opening phase to suppress air defences and strike time-sensitive targets, before being replaced by cheaper precision weapons once control of the battlespace is established.
US equipment losses in Iran campaign estimated at $1.7bn
In addition to munitions expenditure, the campaign has resulted in notable equipment losses.
CSIS estimates total losses at approximately $1.7 billion, including:
- 1× AN/TPY-2 radar: $484.4 million
- 11× MQ-9 Reaper drones: $452.1 million
- 3× F-15E Strike Eagles: $311.1 million
- Base and satellite equipment damage: $310 million
- 1× KC-135 tanker: $164.4 million
While significant in absolute terms, these losses remain limited relative to the scale of US military operations.
Despite the headline figures, the overall cost of the campaign remains modest in the context of US defence spending.
Based on an annual military budget of around $1 trillion, the $16.5 billion spent over 12 days equates to roughly 1.6% of yearly expenditure, or approximately five days of US defence spending. It also represents only around 0.2% of the $7 trillion US federal budget.
For most countries, such costs would be substantial. For the United States, they remain manageable within existing financial capacity.
Iran air campaign costs remain small relative to US defence budget
A significant proportion of the reported costs reflects the use of existing inventories rather than entirely new expenditure.
Many of the munitions used were already stockpiled and have finite shelf lives, requiring eventual refurbishment or disposal. In some cases, operational use can offset these future costs.
Similarly, some equipment losses involve ageing platforms nearing the end of their service life. The KC-135 tanker lost during the campaign, for example, was over 60 years old. Any replacement requirement may therefore accelerate planned procurement rather than create entirely new demand.
The US also benefits from producing most of its own munitions, equipment, and fuel domestically. This means a large proportion of spending is recycled within the national economy rather than flowing abroad.
The data underscores a consistent pattern in modern air warfare: costs are heavily front-loaded, but decline rapidly once air superiority is achieved.
While the initial phase of the Iran campaign required significant expenditure to suppress defences and neutralise threats, the ongoing cost of maintaining air operations has proven far lower.
For the United States, this creates a model of warfare that is expensive to initiate but comparatively sustainable over time, particularly given its scale of defence spending and industrial capacity.
Featured Image: US Navy
