Printed from https://fiscalreceipts.com/program/0604850N/ — built September 26, 2026. Every figure is citation-backed; see the page online for per-number provenance.
SSN(X)
Budget figures
FY2026 award data is a partial year — USAspending reports awards on a rolling basis, and this corpus runs through 2026-09-04. why partial FY2026 data? →
Budget trajectory
| Fiscal year | Amount |
|---|---|
| FY24 | $313.4M |
| FY25 | $333.8M |
| FY26 | $366.0M |
All series figures: R-1 TOA · PB2026
Decade view
P-1/R-1 workbook TOA basis, shown compact in $B/$M (the workbook records USD thousands); each figure cites its own President's Budget edition
The vertical scale does not start at zero: the baseline sits just below this program’s smallest year, so a low point on this line is not a small amount. Read the shape for direction and the grid below for the figures.
● actuals (line) · ○ enacted · ◇ request — gaps are editions the program is absent from, never interpolated.
| Series | FY19 | FY20 | FY21 | FY22 | FY23 | FY24 | FY25 | FY26 |
|---|---|---|---|---|---|---|---|---|
| Actuals | $0 | $0 | $990.0K | $29.2M | $132.1M | $313.4M | ||
| Enacted | – | $0 | $996.0K | $29.5M | $133.8M | $361.6M | $333.8M | |
| Request | – | – | $1.00M | $29.8M | $143.9M | $361.6M | $348.8M | $366.0M |
blank = series not published for this year; – = absent from that edition.
Asked vs spent: the PB2024 book requested $361.6M for FY2024; the PB2026 book reported $313.4M as actual total obligation authority — $48.1M below the request. 313.44 − 361.58 = -48.14 USD millions — the compact figures above are rounded for reading.
Program lineage
No predecessor/successor lineage was recorded for this program element — no FY-to-FY transfer into or out of this line was stated in the ingested J-books, and none was inferred from the program structure.
Description
Mission — SSN(X)
The U.S. Navy must protect the security of the American people by defending against great powers, regional adversaries, and transnational threats. Near peer adversaries are increasing the demand on the U.S. Navy submarine force. The 2025 Interim National Defense Strategy directs the DoD to deter aggression by China in the Indo-Pacific reiterating the need for attack submarines in the pacing scenario. The U.S. Navy must meet the rising challenge by delivering a new attack submarine. SSN(X) will significantly contribute to rebuilding our military, reinforcing deterrence in the undersea, and building lethality in the Joint Force. It will provide greater speed, increased horizontal payload capacity, improved signatures, higher operational availability, and flexibility to adapt to uncertain future threats. SSN(X) will conduct full spectrum undersea warfare and employ and coordinate with a larger contingent of off-hull remote autonomous systems (RAS) and sensors as a force multiplier. It will retain and improve multi-mission (Anti-Surface Warfare (ASuW), Anti-Submarine Warfare (ASW), Subsea Seabed Warfare (SSW), Strike, Special Operating Forces (SOF), Mine, and Intelligence, Surveillance and Reconnaissance (ISR)) capability and sustained combat presence in denied waters. SSN(X) will operate independently or be integrated within a Task Force. The formal acquisition strategy for SSN(X) is being developed and will be informed by requirements post the Analysis of Alternatives (AoA). Preliminary Design for SSN(X) will be accomplished through a collaborative Navy-Industry effort to maximize the benefits of industry and the potential shipbuilders. The SSN(X) program initiated the AoA in FY 2024 to determine the preferred capability solution. The approved Material Development Decision (MDD) designated the SSN(X) a pre-Major Defense Acquisition Program (MDAP), Acquistion Category (ACAT) IB in FY 2025. PB26 provides the required technology development efforts and ramp to support Lead Ship Authorization as early as 2040. FY 2025 focused on technology development efforts started in FY 2024 and completion of the AoA. The SSN(X) program completed the Digital Engineering Strategy to establish the tailored implementation of digital engineering practices across the acquisition life cycle. The SSN(X) program aligns with the Virginia Class Block VIII efforts to support maintaining the design base for SSN(X) as well as provide risk reduction for technology development. FY 2026 will be focused on supporting the Office of the Secretary of Defense's Cost Assessment and Program Evaluation (OSD CAPE) sufficiency review of the AoA, continued technology efforts, and concept refinement to inform requirements. Targeted technology development with Virginia Class Block VIII will continue to reduce risk. SSN(X) will incorporate the best practices and lessons learned from the Virginia Class. FY 2026 funding levels support continued shipbuilder design studies, concept/technology development, completing Gate 2, and initial Capability Development Document (CDD) development.
Mission — SSN(X) Class Submarine Development
SSN(X) will be designed to increase to counter the growing threat posed by adversaries in strategic competition for undersea supremacy. It will provide greater speed, increased horizontal payload capacity, improved signatures, flexibility to adapt to future threats, and higher operational availability. SSN(X) will conduct full spectrum undersea warfare and be able to employ and coordinate with a larger contingent of remote autonomous systems (RAS) and sensors as a force multiplier. This project encompasses Navy RDT&E efforts required to design the next SSN.
Justification
No accomplishments or planned-program narratives in this line's J-book detail — some exhibits carry figures without per-project prose.
Budget line items(workbook-cited)
P-1/R-1 workbook Total Obligation Authority basis (USD thousands) · PB2026.
Exhibit R-1
| Account | Org | Type | Amount |
|---|---|---|---|
| Research, Development, Test and Evaluation, Navy | N | FY24 Actuals | $313.4M |
| Research, Development, Test and Evaluation, Navy | N | FY25 Enacted | $333.8M |
| Research, Development, Test and Evaluation, Navy | N | FY25 Total | $333.8M |
| Research, Development, Test and Evaluation, Navy | N | FY26 Disc. Request | $366.0M |
| Research, Development, Test and Evaluation, Navy | N | FY26 Total | $366.0M |
Budget Details(R-2/P-40 facts)
J-book detail basis (R-2/P-40, USD millions) · PB2026 — a different accounting basis from the P-1/R-1 workbook TOA above; where the two disagree, the reconciliation strip under Budget figures shows both.
Wider than this screen — swipe the table sideways for the remaining fiscal-year columns.
| Project | All Prior Years | FY24 Actuals | FY25 Total | FY26 Base | FY26 Request |
|---|---|---|---|---|---|
| Program Element | $162.3M | $313.4M | $333.8M | $366.0M | $366.0M |
| 2368: SSN(X) Class Submarine Development | $162.3M | $313.4M | $333.8M | $366.0M | $366.0M |
Follow the dollar
No follow-the-dollar view — this program's awards haven't been crosswalked at high confidence (flows cover 312 of 1,938 programs). why coverage is partial? →
Awards
No awards are linked to this program element at high or medium confidence — the budget→award crosswalk only asserts links it can defend, and this line has none yet.
Lobbying mentions
No Senate LDA lobbying filing in the tracked data mentions this program element by code or alias.
Oversight
Department-level designation (not specific to this program)
GAO lists 5 high-risk areas for DOD as a whole. That designation covers the department, not SSN(X). No program-specific GAO finding for this line is in the ingested data. See the DOD oversight record.
Program dossier
No research dossier for this program — dossiers cover 50 of 1,938 programs, the largest fully J-book-detailed lines by FY2026 requested dollars. why no dossier here? →
Primary sources
Open any budget figure for its exact receipt. Verified line items lead with the highlighted government PDF; original spreadsheets download with their budget edition and exhibit in the filename.
Budget totals · TOA sources
FY2026 Department of Defense Budget: RDT&E Programs (R-1) · comptroller.war.gov
Exhibit R-1 · J400
Complete workbook · unchanged saved copy. Saves as PB2026_DoD_R-1_Research-Development-Test-Evaluation.xlsx.
FY2021 Department of Defense Budget: RDT&E Programs (R-1) · comptroller.war.gov
Exhibit R-1 · J417
Complete workbook · unchanged saved copy. Saves as PB2021_DoD_R-1_Research-Development-Test-Evaluation.xlsx.
FY2022 Department of Defense Budget: RDT&E Programs (R-1) · comptroller.war.gov
Exhibit R-1 · J391
Complete workbook · unchanged saved copy. Saves as PB2022_DoD_R-1_Research-Development-Test-Evaluation.xlsx.
FY2023 Department of Defense Budget: RDT&E Programs (R-1) · comptroller.war.gov
Exhibit R-1 · J382
Complete workbook · unchanged saved copy. Saves as PB2023_DoD_R-1_Research-Development-Test-Evaluation.xlsx.
FY2024 Department of Defense Budget: RDT&E Programs (R-1) · comptroller.war.gov
Exhibit R-1 · J381
Complete workbook · unchanged saved copy. Saves as PB2024_DoD_R-1_Research-Development-Test-Evaluation.xlsx.
FY2025 Department of Defense Budget: RDT&E Programs (R-1) · comptroller.war.gov
Exhibit R-1 · J383
Complete workbook · unchanged saved copy. Saves as PB2025_DoD_R-1_Research-Development-Test-Evaluation.xlsx.
Detailed budget justification
The related TOA spreadsheets above use a different accounting basis from R-2/P-40 detail. Their amounts are not assumed to match these detailed sources.
RDTEN BA1-3 Book · www.secnav.navy.mil