The One Big Beautiful Bill (OBBB) introduces significant changes to the tax treatment of charitable contributions beginning January 1, 2026. These updates will reduce the value of deductions for many taxpayers—especially high earners and individuals who itemize. Understanding these changes now provides a critical planning opportunity for 2025, the final year under the more favorable rules.
Key Charitable Giving Changes Effective in 2026
New adjusted gross income floor for charitable deductions.
Starting in 2026, charitable contributions will only be deductible to the extent they exceed 0.5% of adjusted gross income. For example, with an adjusted gross income of $400,000, the first $2,000 of charitable giving produces no deduction.
Deduction cap for top-bracket taxpayers.
High-income taxpayers will see the value of their itemized deductions—including charitable contributions—capped at 35%, even though the top marginal rate remains 37%. For example, $10,000 gift would yield a $3,500 tax benefit instead of $3,700.
New floor for corporate charitable deductions.
Taxpayers who donate through a C-corporation should note that corporations may only deduct the portion of charitable contributions that exceeds 1% of taxable income beginning in 2026.
Practical Strategies to Maximize Tax Benefits Before Year-End 2025
With more restrictive rules taking effect next year, 2025 presents the last opportunity to take full advantage of the current charitable deduction structure.
Bunch multiple years of contributions into 2025.
If you typically spread donations over several years, consider consolidating two or three years of giving into 2025 to lock in a larger deduction before the new AGI floor and caps apply. For example, instead of giving $15,000 annually for the next three years, contributing $45,000 in 2025 preserves the full deduction under current rules.
Use a donor-advised fund to maintain flexibility.
A donor-advised fund allows you to make one large charitable contribution in 2025, claim the deduction immediately, and distribute funds to charities gradually in 2026 and beyond. This maintains consistent support for the organizations you care about while optimizing tax benefits.
Factor in existing adjusted gross income limits for 2025.
Even under current law, charitable deductions are subject to income-based caps. Taxpayers planning large or one-time gifts should review these thresholds to avoid surprises:
- Cash gifts: deductible up to 60% of AGI
- Appreciated assets: deductible up to 30% of AGI
Why Planning Ahead Matters
Once the new rules take effect in 2026, charitable giving will continue to receive tax support, but deductions may be reduced—especially for high-income individuals who itemize. By acting before December 31, 2025, taxpayers can:
• Maximize the value of charitable giving
• Preserve larger deductions under existing rules
• Use vehicles like donor-advised funds to smooth out future giving
• Implement strategies that lower taxable income and support long-term financial goals
Proactive planning in 2025 can help ensure you maintain your charitable intentions while securing the most favorable tax outcome available before the new limitations begin.