Why Fixed-Price Contracts Yield 40% Margins in Defense

Key Takeaways

• Legacy primes like Lockheed Martin rely on cost-plus contracts that guarantee downside protection but cap average operating margins around 11%.
• Anduril established that defense tech companies can achieve roughly 40% margins by executing firm fixed-price contracts rather than traditional government cost-reimbursement deals.
• Replicating prime operational structures inflates cost basis; defense startups maintain high margins by eliminating redundant program management layers.
• Stripping extraneous Federal Acquisition Regulation (FAR) flow-down clauses removes overhead expenses that add compliance weight without delivering capability to the buyer.

The Margin Spread Between Primes and Tech Entrants

Traditional defense procurement was designed to protect suppliers from massive capital losses on experimental hardware. The mechanism was the cost-plus contract. Under that model, the Pentagon reimburses an incumbent's audited expenses and tacks on a negotiated fee. The arrangement shields primes from technical miscalculations, but it enforces a structural ceiling on profitability.

Lockheed Martin operates with average margins hovering around 11%. When every dollar spent increases the absolute fee, efficiency becomes an economic penalty. Incumbents learned to embrace compliance overhead, elongated timelines, and swollen administrative staffing.

Nelson Mills points out that Anduril broke this logic by shifting the commercial model entirely. “Andrew proved that you can build a startup in the government space that you can grow revenue rapidly and you can do that while still remaining agile and fast moving,”▶ Play Mills explains. Anduril accepted product risk internally, funded development upfront, and demanded firm fixed-price contracts on delivery. “They focus on firm fixed price contracts that most primes won't do,”▶ 29:16 Mills notes. “They want their cost plus because it reduces their risk and they've had these bad experience with the government.”▶ 29:21 By taking delivery risk, modern entrants capture the upside of their own efficiency, pushing margins to roughly 40%.

Eliminating the FAR Flow-Down Tax

Achieving software-level margins on hardware requires rethinking organizational design. If a defense startup mimics how a prime operates, its cost basis spikes immediately. Primes maintain deep rosters of program managers whose primary duty is managing compliance paperwork rather than engineering assets.

A major driver of this deadweight is contract administration. Mills highlights the burden created by compliance sprawl: “How do we reduce program management? How do we reduce all these FAR clauses that flow down onto a traditional contract that just raise costs and don't really do anything for the customer?”▶ 30:08

When a prime takes a prime contract, hundreds of standard FAR clauses cascade down to subcontractors. Each clause requires tracking, audits, reporting, and specialized administrative staff. Startups that selectively strip out these flow-downs and flatten program management run lean operations. They treat hardware production more like a commercial technology business than a regulated utility. “If we copy how a prime does business, then your cost basis is just going to be extremely high,”▶ 29:05 Mills says. Cutting the regulatory sediment allows the contractor to retain the spread between production cost and the fixed contract price.

Why It Matters

This margin divergence alters how private capital assesses defense technology. High-margin, fixed-price defense businesses command software valuation multiples rather than prime multiples, attracting growth capital into hardware categories previously viewed as procurement traps. Capital allocators can now underwrite venture-scale returns in defense if entrants avoid cost-plus contracting and reject prime overhead structures.