Air & missile defense · U.S. Army

Patriot

Patriot PAC-3 / PAC-3 MSE interceptor

The Army's workhorse interceptor against aircraft, cruise missiles and ballistic missiles. Eighteen other countries use it, so the U.S. competes with allies, Ukraine included, for every missile off the line.

Launched from: Ground launchers · ~$3.9M each

Estimated leftCritically low

759–827

33–35% of ~2,330 before the war · as of Jul 27, 2026

At the opening campaign's pace (~32/day) that's 24–26 days of fire with no resupply.

EstimateStars and Stripes, Jul 30, 2026

In blocks of 10

Patriot759–827 of ~2,330

left within the estimate's range used since Feb 28

Rebuild model

How fast does the stockpile come back? This projects it forward from the deliveries already in the pipeline and the FY2027 rebuild order, using the budget's own schedules. Move the sliders to test faster production or a renewed war.

Published estimates Projection Low–high range Prewar level

Starts from the newest estimate (Jul 27, 2026) and assumes no firing after it unless you add a renewed war. Fighting has continued at lower intensity since July 8, so treat projections from older estimates as optimistic. The default firing rate is the opening campaign's average: ~32 a day over 39 days.

Table view

Date	Low estimate	High estimate

Every estimate

As of	Claim	Source	Type
Aug 4, 2026	~50% used Per CNN, citing sources familiar with a recent inventory assessment Quote “CNN reported that the United States has used nearly 80% of its Terminal High Altitude Area Defense missile stockpile and about half of its Patriot interceptors since the war began, citing sources familiar with a recent inventory assessment.”	Stars and Stripes Aug 5, 2026	Reported
Jul 31, 2026	Statement Quote “The United States has used about half of the initial inventory for three of these munitions (Patriot, THAAD, and PrSM)”	CSIS Jul 31, 2026	Estimate
Jul 27, 2026	759–827 left Per CSIS (Cancian & Park) Quote “They estimate that the U.S. has between 759 and 827 Patriot interceptors left, roughly a third of its prewar inventory.”	Stars and Stripes Jul 30, 2026	Estimate
Jul 27, 2026	≤1,000 left Quote “This has required extensive use of interceptors, with Patriot inventories now under 1,000 and THAAD inventories at about 250.”	CSIS Jul 27, 2026	Estimate
Apr 8, 2026	1,060–1,430 used Quote “Patriot $3.9 2,330 1,060–1,430 42” Table 1 row.	CSIS Apr 21, 2026	Estimate
Feb 28, 2026	~2,330 before the war Quote “Patriot $3.9 2,330 1,060–1,430 42” Table 1 row. Includes about a thousand older PAC-3s alongside PAC-3 MSE; excludes up to 400 PAC-2s.	CSIS Apr 21, 2026	Estimate

Model inputs

Input	Value	Source
Unit cost	$3.9M	CSIS, Apr 21, 2026 Quote “Patriot $3.9 2,330 1,060–1,430 42”
U.S. deliveries per year (recent average) Table 2: five-year average of U.S. procurement.	183	CSIS, Apr 21, 2026 Quote “PAC-3 MSE 183 29 13 42”
Announced production capacity (all customers) All customers. About half of current output goes to allies and partners.	2,000/yr	CSIS, May 27, 2026 Quote “The surge annual production rate with existing tooling and facilities is 2,000.”
FY2027 budget request	3,203	CSIS, May 27, 2026 Quote “the 3,203 Patriot missiles requested in the Army’s FY 2027 budget”
FY2027 deliveries begin	May 2029	CSIS, May 27, 2026 Quote “These are projected to start delivery in May 2029.”
Months to deliver a full lot Table 2: production time for a full lot.	13	CSIS, Apr 21, 2026 Quote “PAC-3 MSE 183 29 13 42”
CSIS rebuild outlook	3+ years from May 2026	CSIS, May 27, 2026 Quote “heavily used in this war—will take three or more years from today to return to prewar inventory levels.”