Unused room may not be carried past the fifth year
What the document says“No amount may be carried under subparagraph (A) to any calendar year afer the fifth calendar year after the calendar year in which the excess described in such subparagraph occurred.”
The section rewrites the second sentence of section 45D(f)(3) of the Internal Revenue Code of 1986 to bar a carryover past the fifth calendar year after the year the excess arose, and treats any excess for a calendar year before 2026 as having arisen in calendar year 2025.
What the document actually says“No amount may be carried under subparagraph (A) to any calendar year afer the fifth calendar year after the calendar year in which the excess described in such subparagraph occurred.”
Unused room may not be carried past a point. That point is the fifth calendar year after it arose.
Room left over rolls forward until then. After five years the rest is lost. Older room counts as arising in 2025.
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