US War Costs Against Iran Swell to Over Rp 500 Trillion

The U.S.-Iran War Costs Surge Past $31 Billion as Ceasefire Talks Stall and Regional Tensions Escalate

The financial toll of the U.S.-Iran conflict has ballooned to $31.13 billion as of May 13, 2026, according to independent military spending trackers, far exceeding the $29 billion figure the Pentagon disclosed to Congress just days earlier. The discrepancy underscores the escalating costs of "Operation Epic Fury", a prolonged military campaign that has strained U.S. Defense budgets while diplomatic efforts to halt hostilities remain deadlocked. Meanwhile, regional violence—including Israeli strikes in Lebanon and Iranian retaliation in the Gulf—threatens to derail a fragile ceasefire, raising fears of a broader conflagration in the Middle East.

Costs Exceed Pentagon Estimates by $2 Billion

The $31.13 billion figure, compiled by the Military Spend tracker using phased cost models from the Center for Strategic and International Studies (CSIS), the Pentagon, and the Penn Wharton Budget Model, reflects a $2 billion increase since Defense Secretary Pete Hegseth testified before the Senate Appropriations Committee on May 12. Hegseth’s testimony, part of hearings on the FY2027 budget request, cited the war’s cost at "roughly $29 billion"—a figure now acknowledged as an underestimate.

The tracker’s methodology breaks down spending into phases:

• Initial strikes (Feb 28–March 4): ~$1.88 billion per day, driven by high-cost Tomahawk cruise missiles ($3.5 million each) and Patriot PAC-3 interceptors.
• Sustained operations (March 5–April 7): ~$500 million per day, as the U.S. Shifted to cheaper JDAM-guided bombs and reduced reliance on stand-off weapons.
• Ceasefire standby (April 8–May 13): ~$95 million per day, covering aerial patrols, naval deployments, and cyber defense to deter Iranian retaliation.

As of May 13, the war has cost $3.96 million per second, with daily expenses now exceeding $95 million—a figure CSIS described in late April as "under $100 million per day" during the ceasefire period. The surge reflects escalated drone strikes, missile defenses, and logistical support for U.S. Forces in the Persian Gulf, Red Sea, and Gulf of Oman.

Diplomatic Stalemate as Trump Pushes for a Deal

U.S. President Donald Trump, who has framed the conflict as a "nuclear red line" issue, is set to meet Chinese President Xi Jinping in Beijing to pressure Iran into further concessions. Trump’s approach—publicly dismissing concerns over U.S. Economic strain—has drawn criticism from allies, including Vice President JD Vance, who clarified that the administration "of course" considers domestic financial impacts.

"I don’t think about Americans’ financial situation when negotiating with Iran," Trump told reporters on May 13. "I think about one thing: We cannot let Iran have a nuclear weapon, that’s all."

His remarks came as Iranian officials, including Speaker of Parliament Mohammad Bagher Ghalibaf, rejected U.S. Demands for unconditional disarmament, insisting on respect for Iranian sovereignty and an end to Israeli strikes on Iranian-backed militias in Lebanon and Syria. Iran’s Fars News Agency reported that Tehran views the ceasefire talks in China as "a U.S. Ploy to buy time" while Israel continues targeted assassinations of Iranian scientists and military commanders.

Ceasefire at Risk as Lebanon Violence Intensifies

The tenuous ceasefire between Israel and Hezbollah—brokered under U.S. Mediation—faces collapse after Israeli drone strikes in Sidon and Beirut killed eight civilians, including two children, on May 13. Lebanon’s Health Ministry confirmed the attacks, which occurred despite a 48-hour humanitarian pause agreed upon in Washington.

"These strikes violate the ceasefire and will not go unanswered," a Hezbollah spokesperson stated via the Anadolu Agency, warning of "escalatory measures" if Israel persists. The incident follows three days of U.S.-mediated talks in Washington, where Israeli and Lebanese officials met to discuss de-escalation protocols. However, Iran-backed militias in Iraq and Yemen have already resumed drone and missile attacks on U.S. Forces in the region, complicating efforts to stabilize the front.

Regional Domino Effect: Gulf Tensions and Iranian Retaliation

The conflict’s spillover effects are acute in the Gulf of Oman, where Iranian Revolutionary Guard Corps (IRGC) naval units have increased patrols near U.S. Carrier strike groups—including the USS Lincoln, USS Ford, and USS Bush. On May 12, the U.S. Central Command reported three separate incidents involving Iranian fast boats harassing U.S. Vessels, though no direct clashes occurred.

"We are in a state of heightened alert," Admiral Jules Hurst III, commander of U.S. Naval Forces Central Command, told reporters, adding that the U.S. Is "prepared to respond with overwhelming force" if provoked.

Iran’s Supreme Leader Ayatollah Ali Khamenei has framed the conflict as a "test of resolve", urging the IRGC to "prepare for all scenarios" while avoiding direct confrontation with U.S. Forces. However, proxies in Iraq, Syria, and Yemen—including Kata’ib Hezbollah and the Houthis—have intensified indirect attacks, targeting U.S. Bases in Iraq and commercial shipping in the Red Sea.

Economic and Political Fallout

The war’s financial burden has sparked bipartisan backlash in Congress, where Rep. Rosa DeLauro (D-CT), chair of the House Appropriations Committee, demanded transparency on spending.

"The American people deserve to know exactly where every dollar is going—and whether this endless war is achieving its stated objectives," DeLauro said in a statement. "The Pentagon’s $29 billion figure is already outdated. We need an independent audit."

Meanwhile, U.S. Stock markets have reacted to the cost revelations, with defense contractors (Lockheed Martin, Raytheon, Northrop Grumman) seeing short-term gains, while oil prices fluctuated amid disruptions to Middle East energy routes. The International Monetary Fund (IMF) warned that prolonged conflict could shrink global GDP by 0.3% in 2026, exacerbating inflation pressures.

What’s Next?

With ceasefire talks stalled and regional violence escalating, three key developments will determine the conflict’s trajectory:

1. Trump-Xi Summit: Will China leverage its influence over Iran to push for a negotiated withdrawal of U.S. Forces, or will it demand Iranian concessions on nuclear enrichment?
2. Israeli-Lebanese Talks: Can Washington broker a permanent ceasefire before Hezbollah launches a full-scale offensive in southern Lebanon?
3. Iranian Proxy Strategy: Will Tehran de-escalate indirect attacks to avoid direct U.S. Retaliation, or will it expand operations through militias to pressure Washington into negotiations?

For now, the $31 billion war shows no signs of abating, with military spending accelerating even as diplomatic efforts falter. The human cost—civilians in Lebanon, U.S. Service members in the Gulf, and Iranian families under sanctions—continues to rise, casting a shadow over President Trump’s "nuclear red line" strategy.