The IRC Sec. 414(v)(2)(E) (referring to the additional catch-up contributions for 401(k) plans) says this:

(E) Adjusted dollar amountFor purposes of subparagraph (B), the adjusted dollar amount is—

(i) in the case of clause (i) of subparagraph (B), the greater of—

(I) $10,000, or

(II) an amount equal to 150 percent of the dollar amount which would be in effect under such clause for 2024 for eligible participants not described in the parenthetical in such clause, or

(ii) in the case of clause (ii) of subparagraph (B), the greater of—

(I) $5,000, or

(II) an amount equal to equal to [3] 150 percent of the dollar amount which would be in effect under such clause for 2025 for eligible participants not described in the parenthetical in such clause.

That amount defined in 414(v)(2)(E)(i) is now fixed to $11,250. It will never change. This amount will now be adjusted, based on cost of living adjustment rules described in the IRC Sec. 414(v)(2)(C), anchoring on the calendar year starting July 1st, 2024 as the basis. Given that that year just ended - the adjustment wouldn't have kicked in yet.

The IRC Sec. 414(v)(2)(E) (referring to the additional catch-up contributions for 401(k) plans) says this:

(E) Adjusted dollar amountFor purposes of subparagraph (B), the adjusted dollar amount is—

(i) in the case of clause (i) of subparagraph (B), the greater of—

(I) $10,000, or

(II) an amount equal to 150 percent of the dollar amount which would be in effect under such clause for 2024 for eligible participants not described in the parenthetical in such clause, or

(ii) in the case of clause (ii) of subparagraph (B), the greater of—

(I) $5,000, or

(II) an amount equal to equal to [3] 150 percent of the dollar amount which would be in effect under such clause for 2025 for eligible participants not described in the parenthetical in such clause.

That amount defined in 414(v)(2)(E)(i) is now fixed to $11,250. It will never change. This amount will now be adjusted, based on cost of living adjustment rules described in the IRC Sec. 414(v)(2)(C), anchoring on the calendar quarter starting July 1st, 2024 as the basis:

In the case of a year beginning after December 31, 2025, the Secretary shall adjust annually the adjusted dollar amounts applicable under clauses (i) and (ii) of subparagraph (E) for increases in the cost-of-living at the same time and in the same manner as adjustments under the preceding sentence; except that the base period taken into account shall be the calendar quarter beginning July 1, 2024.

The cost of living adjustment must be in increments of $500, so it may be that it wasn't enough this year to move the needle. The regular catch up contribution limit remained $7500 in 2024 and 2025, and only moved by $500 in 2026.