BySara Dorn,

Forbes Staff.

The cost of the Iran war has ballooned $4 billion since the Pentagon’s last public estimate less than two weeks ago, officials said Tuesday—though the economic costs of the war are likely significantly higher.

The war has cost around $29 billion, Defense Department Comptroller Jay Hurst told Congress Tuesday, attributing the increase to “updated repair and replacement of equipment cost and also just general operational cost.”

Hurst previously told Congress at the end of April the war has cost $25 billion so far.