If your annual charitable giving falls below the standard deduction threshold, you are almost certainly leaving a tax benefit untouched. A donor-advised fund (DAF) paired with a contribution-bunching strategy lets you lock in a large deduction this year while continuing to support charities on your own schedule.
How a Donor-Advised Fund Works
You open a DAF account through a sponsoring organization such as Fidelity Charitable, Schwab Charitable, or Vanguard Charitable. You contribute cash, appreciated securities, or other assets to the account and receive an immediate charitable deduction for the full fair market value in the year of contribution.
Inside the DAF, assets grow tax-free. You then recommend grants to any IRS-qualified charity at any time. The sponsoring organization processes the grants on your behalf. There is no deadline for making grants once funds are inside.
The OBBBA 0.5% Floor (New in 2026)
Starting in 2026, the One Big Beautiful Bill Act adds a new rule: itemizing taxpayers can only deduct the portion of charitable contributions that exceeds 0.5% of AGI.
At $200,000 of AGI, the first $1,000 in gifts is non-deductible. Contributions above that floor remain deductible, subject to the AGI percentage caps below.
2026 DAF deduction limits:
- Cash contributions: 60% of AGI
- Appreciated long-term securities: 30% of AGI
- Excess amounts carry forward for up to five years
2026 standard deductions:
- Single: $16,100
- Married filing jointly: $32,200
DAF vs. Giving Directly to Charity
The Bunching Strategy in Practice
Suppose a married couple gives $10,000 per year to charity. Their other itemized deductions (mortgage interest and SALT) total $18,000. Adding $10,000 in gifts gives $28,000, below the $32,200 standard deduction. They take the standard deduction and receive no additional tax benefit from their charitable giving.
By contributing three years of giving to a DAF in a single year:
- Contribute $30,000 to the DAF in year one.
- Assuming $150,000 AGI, subtract the 0.5% floor ($750). The deductible amount is $29,250.
- Total itemized deductions: $18,000 + $29,250 = $47,250, well above the $32,200 standard deduction.
- In years two and three, take the $32,200 standard deduction while the DAF distributes $10,000 to charities each year.
Over the three-year cycle: $47,250 + $32,200 + $32,200 = $111,650 in total deductions, compared to $96,600 ($32,200 x 3) without bunching.
Appreciated Securities Amplify the Benefit
Contributing long-term appreciated stock adds another layer: you avoid capital gains tax on the appreciation and deduct the full fair market value. The 30% of AGI limit applies.
Example: 100 shares with a $2,000 cost basis now worth $15,000. Contributing the stock to a DAF avoids approximately $1,950 in federal capital gains tax (at a 15% rate) and produces a $15,000 deduction, all without selling first.
If you are weighing whether to itemize or take the standard deduction this year, see our guide to standard deduction vs. itemizing in 2026.
Deadlines and Action Steps
- Contributions must be completed by December 31 to count for the 2026 tax year.
- Cash and check contributions must be received and processed by the DAF sponsor before year-end.
- Appreciated securities require 10 to 15 business days for transfer and settlement. Initiate by mid-December.
Have questions about whether a DAF fits your tax picture? Contact TS CPA for a free consultation. We respond within the same day.