Notice 2026-29 — This notice publishes the inflation adjustment factor for the carbon oxide sequestration credit under § 45Q for calendar year 2026.

# SECTION 1. PURPOSE

This notice publishes the inflation adjustment factor for the credit for carbon oxide sequestration under § 45Q of the Internal Revenue Code (§ 45Q credit) for calendar year 2026.¹ The inflation adjustment factor is used to determine the amount of the credit allowable under § 45Q for taxpayers that make an election under § 45Q(b)(3) to have the dollar amounts applicable under § 45Q(a)(1) or (2) apply.

# SECTION 2. BACKGROUND

Section 45Q was added to the Code by § 115 of the Energy Improvement and Extension Act of 2008, enacted as Division B of Pub. L. 110-343, 122 Stat. 3765, 3829 (October 3, 2008), to provide a credit for the sequestration of carbon dioxide. Section 45Q was amended by § 1131 of the American Recovery and Reinvestment Tax Act of 2009, enacted as Division B of Pub. L. 111-5, 123 Stat 115 (February 17, 2009), § 41119 of the Bipartisan Budget Act of 2018 (BBA), Pub. L. No. 115-123 (February 9, 2018), § 121 of the Taxpayer Certainty and Disaster Tax Relief Act of 2020, enacted as Division EE of the Consolidated Appropriations Act, 2021, Pub. L. 116-260, 134 Stat. 3051 (December 27, 2020), § 13104 of Pub. L. 117-169, 136 Stat. 1818 (August 16, 2022), commonly known as the Inflation Reduction Act (IRA), and § 70522 of Pub. L. 119-21, 139 Stat. 72 (July 4, 2025), commonly known as the One, Big, Beautiful Bill Act (OBBBA).

Section 45Q(a)(1) allows a credit of $20 per metric ton of qualified carbon oxide (i) captured by the taxpayer using carbon capture equipment which is originally placed in service at a qualified facility before the date of the enactment of the BBA, (ii) disposed of by the taxpayer in secure geological storage, and (iii) not used by the taxpayer as a tertiary injectant in a qualified enhanced oil or natural gas recovery project.

Section 45Q(a)(2) allows a credit of $10 per metric ton of qualified carbon oxide (i) captured by the taxpayer using carbon capture equipment which is originally placed in service at a qualified facility before the date of the enactment of the BBA, and (ii) either (I) used by the taxpayer as a tertiary injectant in a qualified enhanced oil or natural gas recovery project and disposed of by the taxpayer in secure geological storage or (II) utilized by the taxpayer in a manner described in § 45Q(f)(5).

Section 45Q(b)(3) provides that, for purposes of determining the carbon oxide sequestration credit under this section, a taxpayer may elect to have the dollar amounts applicable under § 45Q(a)(1) or (2) apply in lieu of the dollar amounts applicable under § 45Q(a)(3) or (4) for each metric ton of qualified carbon oxide which is captured by the taxpayer using carbon capture equipment which is originally placed in service at a qualified facility on or after the date of the enactment of the BBA.

Notice 2022-38 provided that 2022 was the final calendar year for which a taxpayer may claim a § 45Q credit under § 45Q(a)(1) and (2) for qualified carbon oxide that is captured by carbon capture equipment originally placed in service at a qualified facility before the date of enactment of the BBA. Therefore, the inflation adjustment amounts in section 3 of this notice only apply if a taxpayer elects under § 45Q(b)(3) to apply the dollar amounts applicable under § 45Q(a)(1) or (2) in lieu of the dollar amounts applicable under § 45Q(a)(3) or (4).

Under § 45Q(f)(7), for taxable years beginning in a calendar year after 2009, the dollar amounts contained in § 45Q(a)(1) and (2) must be adjusted for inflation by multiplying such dollar amount by the inflation adjustment factor for such calendar year determined under § 43(b)(3)(B), determined by substituting “2008” for “1990.”

Section 43(b)(3)(B) defines the term “inflation adjustment factor” as, with respect to any calendar year, a fraction the numerator of which is the GNP implicit price deflator for the preceding calendar year and the denominator of which is the GNP implicit price deflator for 1990. For purposes of § 45Q(f)(7), for the 2025 calendar year, the inflation adjustment factor is a fraction the numerator of which is the GNP implicit price deflator for 2025 (128.888) and the denominator of which is the GNP implicit price deflator for 2008 (88.046).

# SECTION 3. INFLATION ADJUSTMENT FACTOR

The inflation adjustment factor for calendar year 2026 is 1.4639. The § 45Q credit for calendar year 2026 is $29.28 per metric ton of qualified carbon oxide under § 45Q(a)(1) and $14.64 per metric ton of qualified carbon oxide under § 45Q(a)(2).

# SECTION 4. DRAFTING INFORMATION

The principal author of this notice is the Office of Associate Chief Counsel (Energy, Credits, and Excise). For further information regarding this notice contact (202) 317-6853 (not a toll-free number).

¹ Unless otherwise specified, all “section” or “§” references are to sections of the Internal Revenue Code or the Temporary Regulations under Title II of the Omnibus Reconciliation Act of 1980 (26 CFR part 6a).