Inside the CBO Data: How the Navy's $275 Billion Battleship Plan Stresses US Shipbuilding

For decades, the debate over American naval supremacy has largely been an argument about budgets: if Congress appropriates enough money, the ships will materialize. But a new layer of data is shifting that paradigm, revealing that the true bottleneck for the next generation of American sea power is physical, not financial. The capacity of domestic shipyards, the availability of drydocks, and the supply of trained maritime welders are now the hard limits on how fast the fleet can grow. This reality is coming into sharp focus as the Navy attempts to introduce its most ambitious vessel in generations: a nuclear-powered guided missile battleship.

The Congressional Budget Office (CBO) has released a comprehensive forecast detailing the costs and industrial implications of the Navy's 2027 shipbuilding plan, known as the "Golden Fleet." The data shows that constructing 15 of the newly proposed battleships between 2028 and 2056 will cost approximately $275 billion. The first lead vessel, slated for order in 2028, carries an estimated price tag of $23.4 billion, while the subsequent 14 ships are projected to average $18 billion each. These figures are considerably higher than the Navy's initial estimates, which were based on a conventionally powered design rather than the nuclear propulsion the service ultimately selected.[1][2][3][4]

To generate these forecasts, the CBO does not simply accept the Navy's preliminary budget figures. Instead, the agency builds its estimates from historical shipbuilding data, using lightship displacement—the weight of the ship without fuel, cargo, or crew—as the primary metric. By examining the lead ships of previous major programs like the Ticonderoga, Arleigh Burke, and Zumwalt classes, the CBO calculated an average historical lead-ship cost of $485 million per 1,000 tons of lightship displacement. They then adjusted for the complexities of nuclear propulsion, added over $5 billion in non-recurring engineering costs, and modeled the expected learning-curve efficiencies for the follow-on vessels.[1][7]

The most revealing aspect of the CBO's evidence pack is not the dollar amount, but the physical tonnage required from the industrial base. The planned battleships will have a full-load displacement of roughly 35,000 tons, making them more than three times the size of an Arleigh Burke-class destroyer and the largest surface combatants built since World War II. By 2035, the Navy's 2027 plan would more than double the tonnage of large surface combatants that shipbuilders need to produce annually, raising the workload from approximately 16,000 long tons to 35,000 long tons.[1][2][3][7]

The evidence regarding the sheer scale of the industrial challenge is robust. The CBO explicitly flags that increasing large surface combatant tonnage by 60% over a 30-year period will severely test the shipbuilding sector. Currently, only Newport News Shipbuilding is equipped to handle the final assembly of nuclear-powered surface ships, and that facility is already heavily committed to building Ford-class aircraft carriers and Virginia-class submarines. However, the evidence regarding the exact final cost of the battleships remains relatively weak. The CBO notes that its estimates are "highly uncertain" because the vessels are still in the early design phase, and the integration of emerging technologies like hypersonic missiles and rail guns could introduce unforeseen engineering hurdles.[1][6][8]

To accommodate this massive influx of tonnage, the financial architecture of naval procurement will have to shift dramatically. The CBO projects that the average annual funding needed specifically for surface combatants will rise by more than two-thirds, jumping from about $11 billion under the previous 2025 plan to $19.2 billion under the 2027 plan. This increase is driven almost entirely by the high unit cost of the new battleships and the decision to simultaneously extend the production of DDG-51 Flight III destroyers.[1][5][7]

To partially offset the industrial burden, the Navy's data models show a planned reduction in the production of smaller vessels. The 2027 plan replaces most of the previously planned FFG-62 frigates with a smaller, general-purpose frigate design based on the Coast Guard's Legend-class cutter. This shift is expected to decrease the required tonnage for small surface combatants by about 40% by 2035. Furthermore, while final assembly of the battleships will likely be centralized, the Navy intends to distribute the construction of individual modules and sections across multiple shipyards, including Bath Iron Works and Ingalls Shipbuilding, to spread the labor demand.[1][2][6][7]

Ultimately, the CBO's data transforms the battleship program from a theoretical capability debate into a concrete industrial math problem. The $275 billion forecast makes it clear that fielding the most heavily armed surface vessels in naval history will require more than just congressional authorization. It will necessitate a sustained, multi-decade expansion of the American maritime workforce and physical infrastructure—a challenge where the data suggests the margin for error is exceptionally thin.[4][8]