Beginning January 1, 2026, charitable giving becomes more complicated and potentially less rewarding for high‑income donors. The new One Big Beautiful Bill Act introduces two significant changes to charitable deduction rules.
First, itemized charitable deductions will have a 0.5% Adjusted Gross Income (AGI) floor. Second, top‑bracket taxpayers face a revived limitation, capping deduction value at 35% instead of 37%.
Because of this, year‑end giving strategies deserve extra attention in 2025. Many donors may benefit by bunching charitable contributions before December 31, 2025. This approach avoids the 2026 rule changes and provides stronger after‑tax results. Read the details and how to potentially optimize for this change below.
Why 2025 Matters
Calendar year 2025 is the last full year before the new rules start. A gift completed by December 31, 2025 is not reduced by the 0.5% AGI floor. Also, for taxpayers in the top bracket, it is not subject to the 2/37ths itemized deduction haircut. This haircut lowers the marginal value of every deduction from 37% to 35%. That combination makes 2025 a uniquely favorable window to execute larger or bunched gifts. It also makes a good time to consider front‑loading multi‑year philanthropy ahead of the charitable deduction changes 2026. In short, when timing is flexible, pulling planned giving into 2025 can preserve more deduction value.
How the 0.5% AGI Floor Works in 2026
Starting with tax years beginning after December 31, 2025, your charitable deduction only begins after you clear 0.5% of AGI. If your AGI is $500,000 in 2026, the first $2,500 of giving produces no itemized deduction. Amounts above that still face the traditional percentage caps (for example, up to 60% of AGI for cash to public charities), and any excess may carry forward. This floor operates as a quiet drag on deduction value that donors simply didn’t face in 2025. This is one reason many are reevaluating timing before the charitable deduction changes 2026 take hold.
The Top‑Bracket Limitation (2/37ths) in 2026
In addition, taxpayers in the 37% bracket in 2026 face a revived limitation on itemized deductions that reduces the value of those deductions by 2/37ths. This pulls the marginal benefit of deductions from 37% down to 35% for top earners. Delay a large gift into 2026 and every deductible dollar is worth less than it would have been in 2025.
Two Real‑World Illustrations:
The examples below assume cash gifts to public charities, itemizing, and otherwise unchanged facts. Your actual marginal rate and limitations may differ, and carryforwards or other deductions can change the outcome.
Example A: AGI = $500,000; Gift = $50,000 cash
2025 result: The full $50,000 is within the 60% of AGI cap and deductible. If your marginal rate is 35%, the federal income tax savings are about $17,500.
2026 result: Apply the 0.5% floor—0.5% × $500,000 = $2,500. Only $47,500 is deductible. At a 35% marginal rate, savings are about $16,625.
Takeaway: Giving in 2025 avoids the floor and keeps roughly $875 of additional tax savings on the same $50,000 gift.
Example B: AGI = $5,000,000; gift = $1,000,000 cash
2025 result:
No AGI floor or top‑bracket haircut. The entire $1,000,000 fits within the 60% cap. At a 37% marginal rate, savings are about $370,000.
2026 result: First, apply the 0.5% floor: 0.5% × $5,000,000 = $25,000, so the potentially deductible amount is $1,000,000 − $25,000 = $975,000.
Second, the top‑bracket itemized‑deduction limitation reduces the value of deductions by 2/37ths, so the effective tax rate on deductions moves from 37% to 35%. Thus, tax savings are $975,000 × 35% = $341,250, a difference of $28,750 from the savings if the gift was made in 2025.
For comparison, without the 2/37ths haircut the savings on $975,000 at 37% would be $975,000 × 37% = $360,750, a $19,500 reduction purely from the limitation (separate from the $25,000 floor).
Takeaway: Waiting until 2026 reduces savings by roughly $28,750 on the same $1,000,000 gift, driven by both the floor and the 35% cap on benefit.
These are intentionally simple to highlight the mechanics of the charitable deduction changes 2026. In practice, percentage caps, carryforwards, SALT deductions, AMT exposure, the type of property donated, and state tax dynamics all influence the final numbers.
Using a Donor‑Advised Fund in 2025
If your income is high in 2025, or you expect it to grow in 2026 and after, consider making a single, larger contribution to a donor‑advised fund (DAF). A DAF lets you capture the 2025 deduction under today’s rules while recommending grants to charities over time.
Practically, this can help you:
- Avoid the 0.5% AGI floor that applies in 2026 and after
- Preserve the 37% top‑bracket value in 2025 rather than the 35% cap in 2026.
- Consolidate receipts now while keeping flexible grantmaking later.
We’ve seen this approach work especially well for donors with concentrated income—such as a liquidity event—who want to translate a one‑time spike into long‑term charitable impact without sacrificing deduction value to the charitable deduction changes 2026.
What to Do Next
If you plan to give meaningfully over the next few years, assess whether pulling some or all of those gifts into 2025 improves your outcome. The window closes at midnight on December 31, 2025. Confirm cut‑offs for stock transfers, wires, and DAF contributions, and model your full tax picture before you execute.
Every situation is different. Things such as your filing status, state taxes, other deductions, carryforwards, and the assets you donate can all change the answer so please talk with your tax advisor before taking action. For official guidance on charitable deductions generally, including recordkeeping and limits, review the IRS’s Publication 526.
Conclusion
The charitable deduction changes 2026 insert real friction into giving: a 0.5% AGI floor for everyone who itemizes and a 35% cap on the value of itemized deductions for top‑bracket taxpayers. Donors who accelerate gifts into 2025 can avoid both changes and increase the after‑tax resources available for philanthropy. If spreading gifts over years is part of your plan, a 2025 contribution to a DAF can help you capture today’s rules and give at your pace. To discuss your situation and map out the best path before year‑end, Contact Us.
