Updated July 28, 2026. Quick answer: The deduction is taken in the year the sponsoring organisation acquires the assets — not when a grant is later made to an operating charity. That separation is the entire reason the vehicle exists, and under the 2026 rules it is worth more than it used to be, because concentrating giving into one year now clears the new 0.5% floor once instead of repeatedly.
The timing split
| Event | Tax consequence |
|---|---|
| You contribute to the DAF | Deduction, this year |
| The fund grants to a charity, later | None — already deducted |
IRC §4966(d)(2) gives a donor-advised fund a three-part statutory definition, and the irrevocability of the transfer is what makes the deduction available at contribution.
Two things changed for 2026 and most guidance has not caught up. First, IRC §170(b)(1)(I) now imposes a floor of 0.5% of your contribution base — the first half-percent of your giving is not deductible at all, and the IRS has confirmed amounts below the floor are simply lost. Second, IRC §68 was rewritten to cap the benefit of itemized deductions, so a taxpayer in the top bracket now recovers at most 35 cents per charitable dollar rather than 37. Both come from P.L. 119-21 — the same act that rewrote the QSBS rules.
Why bunching is stronger under the new rules
Give the same total across three years and you lose the first 0.5% of contribution base three times. Give it in one year through a DAF, then grant it out over three, and you cross the floor once. The floor turns bunching from a modest optimisation into the default approach for a donor who gives steadily and modestly.
Fund it with appreciated securities rather than cash where you can. You avoid the capital gain entirely and the avoidance is untouched by the new §68 benefit cap, which now bites on the deduction side. That makes securities relatively more attractive than cash in 2026 than they were in 2025.
One thing a DAF cannot do: receive a qualified charitable distribution from an IRA.
No dollar figures appear here, and that is deliberate. The QCD annual cap is inflation-indexed and the figure printed in IRC §408(d)(8)(A) is the original un-indexed amount, which the statute will keep reciting forever. AGI ceilings are percentages, not amounts. Take current dollar limits from the IRS for the year in question, never from an article.
Sources
IRC §170(b)(1)(A), (b)(1)(C), (b)(1)(D), (b)(1)(G), (b)(1)(I) and (d)(1); §170(e)(1) and (e)(5); §170(f)(11) (appraisal); §68 as amended; §408(d)(8) (qualified charitable distributions); §4966(d)(2) (donor-advised funds); §664(d)(1) and (d)(2) (charitable remainder trusts). Amendments from P.L. 119-21. IRS Publication 505 (2026) for the 0.5% floor’s first application year. All read July 2026.
This states what the cited authority says. It is not tax advice, and retirement-plan design turns on facts about your business and your other entities that no page can see. Every dollar limit referenced here is indexed and changes annually.