伊朗战争前三周的财政成本已达到极高水平，仅前六天就耗资超过113亿美元，五角大楼随后又向国会追加申请2000亿美元。仅在开战第一周，美国就发射了约800枚拦截导弹；按每枚PAC-3约400万美元计算，仅这部分成本就超过30亿美元。相比之下，乌克兰在四年战争中总共获得的Patriot拦截弹约为600枚，显示此次消耗速度异常之高。

单项武器与部署成本进一步放大财政压力。一套完整Patriot系统约10亿美元，而PAC-3属于一次性消耗品。除导弹外，美国还向中东部署了两个航母打击群，并实施数百次对伊朗境内目标的打击，形成持续性高支出结构。战争成本已经接近或超过多个美国联邦机构的全年预算，包括国税局123亿美元、食品药品监督管理局72亿美元和国家公园管理局33亿美元。

这一财政结果与特朗普此前强调削减政府浪费形成鲜明反差。DOGE官员声称到2025年底累计节省约2150亿美元，但到10月仅落实约一半，而且其中存在重复计算和理论节省被算作实际节省的问题，因此真实节省额可能更低。换言之，三周战争已迅速吞噬相当于大型政府削减计划的重要份额，而冲突若延长，总账单还将继续按日上升。

The financial cost of the first three weeks of war in Iran has reached an extreme level, with more than $11.3 billion spent in just the first six days and the Pentagon then requesting an additional $200 billion from Congress. In the opening week alone, the US fired about 800 interceptor missiles; at roughly $4 million per PAC-3 missile, that component alone cost more than $3 billion. By comparison, Ukraine received about 600 Patriot interceptors over four years of war, showing an unusually high rate of expenditure.

Unit weapon costs and deployment costs magnify the fiscal burden. A complete Patriot system costs about $1 billion, and PAC-3 missiles are single-use items. Beyond missiles, the US deployed two carrier strike groups to the Middle East and conducted hundreds of strikes on targets inside Iran, creating a continuing high-spending structure. War costs have already approached or exceeded the annual budgets of several US federal agencies, including the IRS at $12.3 billion, the FDA at $7.2 billion, and the National Park Service at $3.3 billion.

This fiscal outcome sharply contrasts with Trump’s earlier emphasis on cutting government waste. DOGE officials claimed cumulative savings of about $215 billion through the end of 2025, but by October only about half had been accounted for, and reports found double-counting and theoretical savings treated as actual savings, implying the real total was likely lower. In effect, three weeks of war have rapidly consumed an amount comparable to a major share of a large government-cutting effort, and if the conflict extends, the total bill will keep rising day by day.