Pentagon Seeks $80 Billion for Iran War Costs as Trump Pushes Record $1.5 Trillion Defence Budget

The United States Pentagon has formally communicated to senators that it requires approximately $80 billion — primarily to cover the costs of America's military campaign against Iran — adding a significant new layer to what is already an unprecedented defence spending push under President Donald Trump.

While the White House Office of Management and Budget is yet to make a formal request to Congress, Defence Secretary Pete Hegseth has been actively lobbying Capitol Hill, including as recently as Monday evening. Deputy Defence Secretary Stephen Feinberg personally notified congressional committees last week that the $80 billion request had been submitted to the OMB, according to two people familiar with the matter who were not authorised to speak publicly.

The Scale of the Ask

The $80 billion Iran war funding request does not exist in isolation — it sits within a far larger and historically unprecedented defence spending proposal.

The Trump White House has requested a staggering $1.5 trillion for the Pentagon — a nearly 50% increase over the current fiscal year's funding levels. Of this, Republicans hope to secure approximately $1.1 trillion through the regular appropriations process, which traditionally requires bipartisan support. An additional $350 billion is being sought through a largely party-line vote expected later this summer.

The $80 billion figure itself has already drawn scrutiny. It stands in sharp contrast to the $29 billion war cost estimate that Hegseth had provided to Congress just last month during his testimony — a figure that covered munitions replacement, equipment repair, and operational costs for deployed forces, but notably excluded the cost of repairing or rebuilding U.S. military installations damaged during the conflict. It also falls far short of the $200 billion the Pentagon initially floated as a potential cost estimate at the outset of the war. For context, early estimates had pegged the cost of the war's first week alone at $11.3 billion.

Scepticism on Both Sides of the Aisle

The funding push faces significant headwinds on Capitol Hill, with lawmakers from both parties expressing reservations — though for differing reasons.

Senate Majority Leader John Thune, a Republican from South Dakota, acknowledged that a supplemental spending request from the administration is expected, saying his chamber would "work through it and see where the votes are." He framed the need for funds partly in terms of restoring depleted military stockpiles — "not only just with what's happening with Iran, but prior to that."

Democratic opposition has been sharper. Senator Patty Murray of Washington confronted Hegseth directly during a Senate hearing last month, telling him: "You're spending families' hard-earned tax dollars on a war that many strongly oppose." Senator Brian Schatz of Hawaii, a member of Democratic leadership, went further, warning that the actual price tag could ultimately exceed even the $80 billion figure being proposed. He added that he had yet to find a single Democratic colleague willing to support Iran-focused funding legislation.

Senator Jack Reed of Rhode Island, the ranking Democrat on the Senate Armed Services Committee, argued that any Iran supplemental cannot be considered in isolation — it must be part of a broader, bipartisan agreement on total spending levels for both defence and non-defence programmes.

Republican Case for the Funding

Not all Republican voices have framed the request purely around the war. Senator Jim Banks of Indiana suggested the issue is "less about the war" and more about replenishing defence stockpiles and strengthening the domestic defence industrial base. "I would sell it to my state as an investment in our defence industrial base, reshoring defence production to Indiana," Banks said.

Senator John Hoeven of North Dakota, who sits on the Appropriations subcommittee on Defence, said he has been working with the administration to broaden the funding package to include disaster relief for California, Hawaii, and other states affected by wildfires and extreme weather events, as well as agricultural aid for farmers. "I think that's the kind of combination that could pass," Hoeven said — signalling that the Iran war bill may need to be bundled with domestic relief measures to secure enough votes.

Hegseth's Defence

Hegseth declined to take questions from reporters as he moved through the Capitol on Monday evening. However, during last month's Senate hearing, he offered a pointed rhetorical response to questions about the war's cost: "What is the cost of Iran obtaining a nuclear weapon?" He acknowledged that the president's decision to confront the threat of a nuclear-armed Iran "comes with cost — and we recognise that."

What It Means

The $80 billion request sets the stage for a bruising legislative battle over war funding, defence spending, and fiscal priorities — all playing out against the backdrop of an American public grappling with a high cost of living. With Democrats largely opposed and several Republicans conditioning their support on bundled domestic relief, the path to passage remains uncertain.

The outcome will have significant implications not just for U.S. defence posture but for the broader question of democratic oversight over presidential war-making — a debate that has resurfaced with renewed urgency in Washington.