PAC-3 CRI vs Shahab-3: Cost-Exchange Ratio & Combat Analysis
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2026-03-21
3 min read
Overview
This analysis compares the PAC-3 CRI, a US Terminal (cost-red) system costing $3.5M per unit, against the Shahab-3, an Iranian MRBM backbone costing $750K per unit. The cost-exchange ratio of 4.7:1 favors the attacker — meaning it costs the defender 4.7x more to intercept than the missile cost Iran to produce. Cost Reduction Initiative variant of PAC-3 with 90% of MSE capability at lower unit cost Iran's most numerous MRBM — liquid-fueled Nodong derivative, 1,300km range
Side-by-Side Specifications
| Dimension | Pac 3 Cri | Shahab 3 |
|---|
| Unit Cost |
$3.5M |
$750K |
| Cost-Exchange Ratio |
4.7:1 |
4.7:1 |
| Range |
Terminal (cost-red) |
1300 km |
| Inventory |
~700 |
~500 |
| Annual Production |
200/yr |
— |
| Role |
Terminal (cost-red) |
MRBM backbone |
| Manufacturer |
Lockheed Martin |
Iran / IRGC |
| Fuel |
Solid rocket |
— |
Head-to-Head Analysis
Cost-Exchange Economics
The PAC-3 CRI costs $3.5M per unit while the Shahab-3 costs just $750K, creating a 4.7:1 cost-exchange ratio. Unfavorable for the defender. The attacker has significant cost advantage.
The Shahab-3 has a 4.7:1 cost advantage over the PAC-3 CRI. This asymmetry is a key factor in the conflict's economic sustainability.
Inventory & Depletion
Coalition forces have approximately 700 PAC-3 CRI interceptors with annual production of 200 units. Iran maintains an estimated 500 Shahab-3 units. The PAC-3 CRI is already 50% depleted vs operational requirements.
Coalition holds an inventory advantage, but at 4.7:1 cost ratio, this is offset by economics.
Tactical Engagement
The PAC-3 CRI engages the Shahab-3 during the terminal phase. With 1300km range, the Shahab-3 can be launched from deep within Iranian territory, complicating launch detection. 90% of MSE capability at 83% cost.
The PAC-3 CRI is designed to counter threats like the Shahab-3, but sustained engagement at 4.7:1 cost ratios creates long-term sustainability challenges.
Scenario Analysis
Mass salvo of Shahab-3 missiles
In a saturation attack using Shahab-3 systems, the PAC-3 CRI battery would need to engage multiple targets simultaneously. At $3.5M per interceptor, a salvo of 5 Shahab-3 missiles would cost $3.8M to launch but $17.5M to intercept.
Shahab-3
Extended conflict (30+ days)
Over 30 days of sustained combat, the PAC-3 CRI inventory faces significant depletion pressure. Annual production of 200 units translates to just 0.5 per day — far below consumption rates during active operations. Meanwhile, Iran produces approximately 3.3 ballistic missiles and 6.7 drones per day.
Attacker (Iran) — production outpaces defender replenishment
Complementary Use
The PAC-3 CRI should be integrated into a layered defense architecture, not relied upon as a standalone solution against Shahab-3 threats. Cost-effective lower-tier systems (Iron Dome at $80K, or Iron Beam laser at $2/shot) should handle cheaper threats when possible, preserving expensive PAC-3 CRI interceptors for high-value targets.
Overall Verdict
The PAC-3 CRI vs Shahab-3 matchup produces a 4.7:1 cost-exchange ratio favoring the attacker. For sustained conflict planning, interceptor production ramp-up and cost-reduction programs are critical to maintaining defensive capability.
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