New Tax Law Creates 0.5% Floor on Charitable Deductions, Reshaping Nonprofit Fundraising

The One Big Beautiful Bill Act (OBBBA), signed into law in 2025, includes charitable giving provisions that took effect January 1 and are already forcing nonprofits and foundations to rethink their fundraising strategies. The centerpiece: a new 0.5% adjusted gross income floor on individual charitable deductions and a 1% floor for corporations.

For a household earning $300,000, that means the first $1,500 in annual donations generates zero tax benefit. For a corporation with $10 million in taxable income, the first $100,000 in charitable contributions is not deductible. These floors don't eliminate giving — but they eliminate the tax incentive for smaller, routine contributions that many nonprofits depend on.

What Changed for Donors

The OBBBA made several simultaneous adjustments to the charitable deduction landscape:

• Itemizers now face the 0.5% AGI floor, effectively creating a "deductible" before charitable tax benefits kick in
• Top-bracket taxpayers see their deduction value capped at 35%, down from the full 37% marginal rate
• Non-itemizers gain a new above-the-line deduction of up to $1,000 ($2,000 for married couples), allowing charitable deductions without itemizing — though donations to donor-advised funds and most private foundations do not qualify
• The 60% AGI limit for cash contributions to public charities, originally set to expire after 2025, is now permanent

The law also permanently increased the estate and gift tax exemption to $15 million per individual ($30 million for joint filers), which may reduce the charitable planning urgency that drives some major gifts.

Why Grant-Dependent Organizations Should Pay Attention

The Tax Foundation's analysis projects that the AGI floor will disproportionately affect mid-size donors whose annual giving falls below the threshold — precisely the donor segment that sustains many community foundations and regional nonprofits. Organizations relying on broad-based annual campaigns may see declining participation as the marginal tax benefit disappears for their median donor.

Conversely, the new above-the-line deduction could activate giving among the roughly 90% of filers who take the standard deduction. Whether this offsets losses from the floor remains an open question.

Strategic Moves for Nonprofits Now

Fundraising consultants recommend "bunching" strategies — encouraging donors to consolidate two or three years of planned giving into a single tax year to clear the 0.5% floor and maximize deductions. Donor-advised funds remain a key vehicle for this approach. Nonprofits tracking policy changes through resources like grantedai.com should begin communicating these shifts to their donor base before year-end planning season begins.