South Korea has made public the unit price of its indigenous KF-21 Boramae fighter, reinforcing cost as a central pillar of the program’s strategy as mass production approaches, expected to begin in 2026.
According to values discussed in the South Korean defense program Bon Game 2, Block 1, aimed mainly at air superiority and air defense missions, will cost approximately US$83 million per aircraft. Block 2, with expanded multirole capabilities — especially in air-to-ground missions — should reach around US$112 million per unit.
Mass production and market strategy
The price announcement comes at a key moment in the program, which is moving towards serial production after the completion of flight tests of six prototypes by mid-2026. By presenting clear values for its first blocks, Seoul seeks to position the KF-21 not only as a viable replacement for aging fighters, but also as a competitive option in the international market, especially for countries that consider the costs of fifth-generation aircraft prohibitive.
Block 1 and Block 2: differences and costs
The price difference mainly reflects the mission profile and the set of integrated systems.
Block 1, with an order for 40 aircraft for the Republic of Korea Air Force between 2026 and 2028, focuses on aerial combat, offering a modern airframe, low observability configuration and locally developed AESA radar. At $83 million, the value is below many front-line Western fighters.
Block 2, planned for around 80 aircraft, expands the mission spectrum to full air-to-ground strikes. The higher price — approximately US$112 million (about 161.5 billion South Korean won) — is linked to the integration of additional weapons and attack systems, without profound structural changes to the plane’s airframe. Even so, local analysts highlight that the cost remains lower than that of several European and North American multirole fighters with similar performance and range.
Direct comparison with the American F-35
In comparison with the F-35 Lightning II, the price contrast is one of the main arguments in favor of the KF-21. The F-35A — the most common conventional variant — has a unit cost that, depending on the batch and contract, is usually in the range of US$80 to 90 million in terms of flyaway cost, and can exceed US$100 million when considering complete acquisition, support and infrastructure packages.
In this context, the KF-21 Block 1, at US$83 million, is close to the value of the basic F-35A, while the Block 2, at US$112 million, still tends to be competitive compared to the total acquisition cost of the American fighter. The difference becomes more relevant when factors such as operating costs, political restrictions, interoperability requirements and export limitations associated with the F-35 come into account.
Supply chain and exports
Boramae’s cost advantage is reinforced by a largely domestic supply chain and planned scale of production, which tends to reduce unit price volatility in early batches. South Korean authorities describe the KF-21 as a “complementary” fighter to the fifth-generation models, and not as a direct replacement — a narrative that gains strength with the dissemination of these values.
Priced at US$83 million in Block 1 and US$112 million in Block 2, the KF-21 enters the market as a rare case of a newly developed supersonic fighter with transparent and relatively moderate pricing. As series production approaches and export campaigns progress, cost — more than absolute performance — tends to consolidate itself as Boramae’s main defining characteristic.
Source: South Korea’s National Defense Public Affairs Agency (kfn). This content was created with the help of AI and reviewed by the editorial team.
