National Center for Science and Engineering Statistics | NSF 26-309 Table 10. Federal budget authority for Energy (270) R&D and R&D plant: FYs 2024–26 (Millions of dollars and percent change) Budget function and agency 2024 actual ($millions) 2025 preliminarya ($millions) 2026 proposed ($millions) 2024–25 (% change) 2025–26 (% change) R&D and R&D plant 6,140 6,004 1,964 -2.2 -67.3 Energy supply (271) 6,044 5,940 1,898 -1.7 -68.0 Department of Energy 5,927 5,855 1,824 -1.2 -68.8 Energy programs 5,927 5,855 1,824 -1.2 -68.8 Energy efficiency and renewable energy 2,507 2,022 819 -19.3 -59.5 Fossil energyb,c 1,563 1,589 -399 1.7 -125.1 Nuclear energy 780 1,358 1,187 74.1 -12.6 Electricity delivery 171 180 191 5.3 6.1 Cybersecurity, Energy Security, and Emergency Responsec 110 108 -50 -1.8 -146.3 Advanced Research Projects Agency- Energy (ARPA-E) 460 460 200 0.0 -56.5 Clean Energy Demonstrationc 217 50 -200 -76.8 -496.9 Bonneville Power Administration Fund 2 2 2 0.0 0.0 Tennessee Valley Authority 117 85 74 -27.4 -12.9 Energy information, policy, and regulation (276) 96 64 66 -33.3 3.1 Nuclear Regulatory Commission 96 64 66 -33.3 3.1 R&D 5,996 5,895 1,916 -1.7 -67.5 Energy supply (271) 5,900 5,831 1,850 -1.2 -68.3 Department of Energy 5,783 5,746 1,776 -0.6 -69.1 Energy programs 5,783 5,746 1,776 -0.6 -69.1 Energy efficiency and renewable energy 2,413 1,943 785 -19.5 -59.6 Fossil energyb,c 1,513 1,560 -413 3.1 -126.5 Nuclear energy 780 1,358 1,187 74.1 -12.6 Electricity delivery 171 180 191 5.3 6.1 Cybersecurity, Energy Security, and Emergency Responsec 110 108 -50 -1.8 -146.3 Advanced Research Projects Agency-Energy (ARPA-E) 460 460 200 0.0 -56.5 Clean Energy Demonstrationc 217 50 -200 -76.8 -496.9 Bonneville Power Administration Fund 2 2 2 0.0 0.0 Tennessee Valley Authority 117 85 74 -27.4 -12.9 Energy information, policy, and regulation (276) 96 64 66 -33.3 3.1 Nuclear Regulatory Commission 96 64 66 -33.3 3.1 a The preliminary data available from the agencies for FY 2025 at the time of this report reflect mainly the annualized continuing resolution funding levels that existed through early March 2025, which were later extended by a continuing resolution to the end of FY 2025. b Fossil energy was renamed to Fossil energy and carbon management in the 2023 Presidential Budget Request, and it was renamed back to Fossil energy in the FY 2026 Presidential Budget Request. c Several Department of Energy programs reported negative R&D estimates, which are from Infrastructure Investment and Jobs Act (P.L. 117-58) rescissions accounted for in FY 2026 advanced appropriations. Note(s): Detail may not add to total because of rounding. Percent change is calculated on unrounded data. Source(s): Agencies' submissions to the Office of Management and Budget (OMB) per MAX Schedule C, agencies' budget justification documents, supplemental data obtained from agencies' budget offices, and Executive Office of the President, OMB, Budget of the United States Government, Fiscal Year 2026.