Air Force Plans to Set New Goal for B-21 Fleet Size in 2028 Budget

Why It Matters

A larger B‑21 fleet would boost U.S. strategic deterrence against near‑peer rivals and spread development costs over more units, improving affordability and operational availability.

Key Takeaways

• Air Force may raise B‑21 target to ~145 aircraft for FY 2028.
• Defense Secretary Hegseth and STRATCOM chiefs urge “a lot more” bombers.
• Budget decision will occur in spring 2027, shaping long‑term force structure.
• Past B‑2 cuts drove unit cost above $2 billion, warning on affordability.
• Increased fleet improves deterrence against China and supports high‑risk missions.

Pulse Analysis

The B‑21 Raider, the Air Force’s first sixth‑generation stealth bomber, is slated for initial deliveries in the mid‑2020s, but its ultimate fleet size remains fluid. Senior officials have signaled that the 100‑aircraft minimum embedded in the original program of record will likely be revised upward in the FY 2028 budget request, which the service will submit in spring 2027. Lt. Gen. David Tabor’s recent testimony hinted at a target near 145 aircraft, echoing endorsements from the Secretary of Defense and the heads of U.S. Strategic Command.

Raising the B‑21 count carries both strategic and fiscal consequences. Spreading the development and production costs across a larger number of airframes could lower the unit price, a lesson learned from the B‑2 Spirit program where reductions to a 21‑aircraft fleet pushed the per‑unit cost above $2 billion. A bigger fleet also improves sortie generation and mission‑capable rates, mitigating the low availability that has plagued the B‑2 fleet in recent years. For Northrop Grumman, higher volumes sustain the digital‑design supply chain that has already proven its efficiency.

The push for more Raiders reflects a shifting threat environment, particularly the rapid modernization of China’s integrated air‑defense network and its expanding long‑range strike capabilities. Recent B‑2 missions against Iranian targets demonstrated the value of deep‑penetration stealth platforms, and a robust B‑21 force would provide the United States with a credible deterrent and flexible strike option across the Indo‑Pacific. As Congress weighs the FY 2028 budget, the final fleet size will signal how aggressively the Pentagon intends to counter near‑peer challenges while preserving long‑term affordability.