CBO Estimates $275 Billion Price Tag for US Navy’s Trump-Class Battleships

What the CBO’s Numbers Reveal About the Trump-Class Program

The US Navy’s future Trump-class nuclear-powered battleship programme could cost $275 billion between 2027 and 2056, according to the first independent cost estimate from the Congressional Budget Office. The figure covers the acquisition of 15 next-generation surface combatants designed to form the backbone of the Navy’s 2027 “Golden Fleet” plan. The lead ship, a nuclear-powered guided missile battleship designated BBGN, is expected to cost $23.4 billion, with each subsequent vessel averaging $18 billion.

The CBO analysis, published in early August 2026, marks the first official dollar-value assessment since the Trump administration announced the class in late 2025. The programme replaces earlier plans for the smaller DDG(X) destroyer, a shift the Navy says avoids capability compromises. The new battleships are intended to be the most heavily armed surface combatants in US history, packing up to 128 vertical launch missile cells, 12 hypersonic missiles per ship, nuclear cruise missiles, lasers, railguns and advanced defensive systems.

A key finding is that nuclear propulsion adds roughly 13% to the cost of the lead ship compared with a conventionally powered variant. The Navy had originally estimated the conventional version at $15.1 billion for the first hull; the CBO now puts the nuclear lead ship at $23.4 billion. However, both the service and the budget office caution that final technical specifications and cost projections remain uncertain because the vessel is still in early design.

The report warns that the programme will place exceptional strain on the shipbuilding industrial base. By 2035, annual tonnage output for large surface combatants must more than double, requiring a 60% increase in large-combatant production while smaller vessel output drops roughly 40%. The CBO also flags that the only US yard certified to build nuclear-powered surface ships — Newport News Shipbuilding — is already grappling with delays on aircraft carrier and submarine construction, raising concerns that the battleship workload could further extend those timelines and affect fleet readiness.

Inside the Industrial and Budgetary Challenges

Where the $275bn Figure Comes From

The CBO’s estimate is not a snapshot of a final, locked-in design. By its own admission, the analysis relies on early Navy cost targets and parametric models based on publicly available data. The 13% cost premium for nuclear propulsion reflects integration of a reactor plant, shielding, and specialised crew training, but the budget office cannot yet estimate lifetime operating expenses — which may offset some of the procurement difference through avoided fuel costs. Still, the $23.4 billion lead-ship price tag puts the Trump class in the same acquisition league as the Ford-class aircraft carrier ($22 billion per ship), yet with substantially greater organic missile firepower.

The Newport News Bottleneck

All final assembly of the nuclear-powered BBGN will occur at Huntington Ingalls Industries’ Newport News Shipbuilding in Virginia, the sole US facility certified for new-construction nuclear surface ships. The yard is currently behind schedule on both Ford-class carriers and Virginia-class submarines. Adding a new, large, complex platform with a first-in-class lead ship inherently carries steep learning-curve risks. The CBO bluntly warns that the additional workload could “further extend existing project timelines.” For the Navy, this means the battleship programme may compete directly with the service’s highest-priority recapitalisation efforts for skilled labour, dry dock space and supplier attention.

Industrial Ripple Effects for Bath Iron Works and Ingalls Shipbuilding

While Newport News handles nuclear assembly, two other major surface combatant yards — General Dynamics’ Bath Iron Works and HII’s Ingalls Shipbuilding — will supply modules. Neither yard is nuclear-certified, and both are already dealing with late deliveries on destroyer contracts. The CBO’s projection that smaller-vessel output will shrink by about 40% reflects the Navy’s deliberate shift toward large combatants. For the two shipyards, this means a potential decline in Arleigh Burke-class destroyer and Littoral Combat Ship work, forcing a retooling towards module production and, in the longer term, a fight for scarce large-combatant contracts. The adjustment carries commercial risk for the companies and workforce continuity risk for the communities they anchor.

Budget Trade-Offs and Congressional Oversight

A $275 billion price tag over 29 years translates to an average of roughly $9.5 billion annually, a substantial slice of the Navy’s shipbuilding budget. The CBO’s analysis provides ammunition for lawmakers who may question the affordability of the Golden Fleet plan amid competing demands for Columbia-class submarines, Ford-class carriers and unmanned systems. The report also implicitly invites scrutiny of the decision to leap directly from destroyers to battleships, bypassing the intermediate DDG(X) design. As the first BBGN order is scheduled for 2028, the programme’s cost profile is likely to become a flashpoint in the fiscal 2028 defence budget debate, with particular focus on whether nuclear propulsion’s tactical advantages justify both the procurement premium and the single-yard dependency.

What This Means for Shipbuilders, Investors, and the Navy

The CBO assessment crystallises several immediate concerns for the defence ecosystem:

• For Huntington Ingalls Industries: Newport News must aggressively address schedule overruns on existing programmes or risk compounding delays when BBGN work begins. The yard’s nuclear monopoly positions it as the programme’s biggest industrial beneficiary, but only if it can demonstrate capacity to absorb the work. Investors should watch the company’s capital spending plans and any signs of Navy willingness to fund shipyard modernisation.
• For General Dynamics (Bath Iron Works): The projected decline in smaller-vessel construction requires a clear strategy to pivot toward module fabrication for the Trump class and other large combatants. Securing a stable module supply role will be critical to offset the reduction in destroyer volume, while the company may also need to invest in workforce training for higher-complexity nuclear-related components.
• For congressional defence committees: The first order in 2028 means authorisers and appropriators have roughly two years to demand a more detailed cost estimate and design maturity review. The CBO report will likely be cited to justify a hold on long-lead funding until the Navy delivers a formal Capability Development Document with firm technical specifications.
• For the Navy programme office: The 13% nuclear premium must be defended with rigorous operational analysis. Without a credible life-cycle cost comparison — factoring in fuel, maintenance, and strategic advantages — the service risks seeing the nuclear variant challenged in favour of a conventional alternative that eases the Newport News bottleneck.
• Suppliers and lower-tier shipbuilders: A 60% surge in large-combatant tonnage will strain the entire supply chain, from propulsion components to steel and combat systems. Companies with niche capabilities in nuclear plant equipment, hypersonic launchers, and advanced radar should prepare for a surge in demand, while those reliant on smaller surface combatant orders will need to diversify.