Clear Money Guide
What this guide covers
A quick view of the questions and evidence developed below.
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Updated July 28, 2026. Quick answer: IRC §68 was rewritten to reduce itemized deductions by 2/37 of the lesser of the deductions or the taxable income above the start of the 37% bracket, which caps the tax benefit at the top. A donor in the top bracket now recovers at most 35 cents per charitable dollar, not the 37 their marginal rate would suggest. Every “a charitable gift costs you only (1 minus your rate)” calculation written before 2026 now overstates the benefit for high earners.
Read box by box from the IRS form text: Form 1098-C boxes 4a to 5b.
S corporation return (Form 1120-S) for 2025, read line by line: Form 1120-S Schedule K lines 11 to 13.
Partnership return (Form 1065) for 2025, read line by line: Form 1065 Schedule K lines 12 to 14.
More IRS forms and schedules, read line by line: Form 8283 instructions.
What changed
Previously the value of a deduction followed your marginal rate: a dollar deducted in the top bracket saved you the top rate. The rewritten §68 breaks that link at the top, reducing the benefit so that the effective recovery is capped below the top marginal rate.
| Bracket | Recovery per charitable dollar |
|---|---|
| Below the top | Broadly your marginal rate |
| Top bracket | Capped — at most 35 cents |
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 in the year given, and IRS Publication 505 (2026) states that any amount that falls under the 0.5% floor can’t be deducted in 2026. 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.
Who this actually changes behaviour for
The people who give the most. A high-bracket donor comparing a cash gift against a gift of appreciated stock is now working with a smaller deduction benefit on the cash side, while the capital-gain avoidance on appreciated stock is unaffected by §68. That shifts the balance toward giving securities rather than cash, and the shift is new this year.
Combined with the new 0.5% floor, the deduction is squeezed from both ends in the same tax year — a floor at the bottom and a benefit cap at the top. Anything written before 2026 describes neither.
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.
Figures verified against 26 U.S.C. 68, 26 U.S.C. 170 and IRS Publication 505 (2026) on September 29, 2026.
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.
This states what the cited authority says. It is not tax advice, and charitable deduction outcomes turn on facts about your income and your gifts that no page can see. Every dollar limit referenced here is indexed and changes annually.