Corporate Charitable Giving Strategy

Corporate charitable giving strategy faces significant changes starting in 2026, as new tax legislation introduces a minimum threshold that could reduce or eliminate deductions for many businesses. The One Big Beautiful Bill Act has added complexity to corporate charitable contribution rules that C corporations must understand to plan their giving strategies effectively. So, what does navigating the 2026 deduction floor entail?

Understanding the Traditional Corporate Charitable Deduction Ceiling

Historically, the rules governing corporate charitable deductions have been relatively straightforward. C corporations have been allowed to deduct charitable contributions up to 10% of their taxable income for the year, calculated without regard to the charitable contribution itself. This limitation, known as the “Ceiling,” has long been the primary restriction on corporate charitable deductions. When contributions exceed this 10% cap, corporations can carry forward the excess amounts for up to five years.

The New Floor Requirement: A Game-Changing Addition

Section 70426 of the One Big Beautiful Bill Act introduces a new wrinkle to corporate charitable deductions through Internal Revenue Code Section 170(b)(2)(A). Effective for taxable years beginning after 2025, corporations face an additional hurdle: the “Floor” requirement.

Under this new provision, charitable contributions made by C corporations are now deductible only to the extent they exceed 1% of the corporation’s taxable income. This means corporations must clear both the Floor and stay under the Ceiling to maximize their charitable deductions. The Floor applies to all contributions except certain qualified conservation contributions.

How the Floor and Ceiling Work Together

The interaction between these two limitations creates three possible scenarios for corporate charitable giving. First, if a corporation’s total charitable contributions fall below the 1% Floor, no deduction is allowed whatsoever, and the disallowed amount cannot be carried forward. Second, if contributions exceed the Floor but remain below the 10% Ceiling, the corporation can deduct the amount above the Floor. However, the portion below the Floor is permanently lost and cannot be carried forward. Third, if contributions exceed both the Floor and the Ceiling, complex carryforward rules come into play.

Complex Carryforward Rules Require Careful Planning

The carryforward provisions under the new law add significant complexity. Contributions exceeding the Ceiling may still be carried forward for up to five years on a first-in, first-out basis. However, amounts disallowed due to the Floor can only be carried forward if the corporation’s total contributions exceeded the Ceiling in that taxable year. This creates a situation where corporations making modest charitable contributions relative to their income may lose deductions permanently, while those making larger contributions may preserve some tax benefits for future years.

There are two interpretations on the meaning of the new law for deductions above 10% of taxable income. One view is that corporations may deduct only the portion of their charitable contributions that exceeds the new 1% floor, so long as the deductible amount does not surpass the existing 10% cap on taxable income. Under this approach, a corporation would need to contribute at least 11% of its taxable income before any deduction becomes available, because the first 1% cannot be deducted. Another interpretation is that corporations may deduct only the difference between the 10% cap and the 1% floor.  Hopefully, the IRS will provide further guidance regarding these interpretations relatively soon.

Real-World Impact on Corporate Giving

Consider a corporation with $1 million in taxable income that donates $9,000 to charity in 2026. While this contribution would have been fully deductible under previous law, it now generates no deduction because it fails to exceed the $10,000 Floor (1% of taxable income). Furthermore, since the donation did not exceed the Floor, the corporation cannot carry forward any portion of the $9,000 contribution.

In contrast, if the same corporation contributed $90,000, the Floor would reduce the deductible amount to $80,000, with the remaining $10,000 permanently lost. While the corporation made a substantial charitable contribution, unfortunately the new tax law will effectively ignore $10,000 of that generosity.

For corporations contributing $120,000, the dynamics shift again. Under the first interpretation described above, after applying the Floor, $110,000 remains potentially deductible. However, the Ceiling limits the current year deduction to $100,000. The remaining $20,000 (including the Floor amount) can be carried forward because the Ceiling was exceeded. Under the second interpretation, the corporation has a $90,000 deduction and carries forward $30,000 which would include the $10,000 (the floor) and the remaining $30,000 donation that was disallowed in the year of contribution.

Planning Considerations | Corporate Charitable Giving Strategy

Corporations now face strategic decisions about charitable giving timing and amounts.

The most immediate planning opportunity is the 2025 tax year, the final year in which no charitable-deduction floor applies. Corporations can strengthen their philanthropic impact by accelerating planned gifts into 2025, ensuring full deductibility up to the existing ceiling. Front-loading contributions into donor-advised funds can preserve tax efficiency while allowing companies to maintain steady grantmaking in future years.

Starting in 2026, timing will play a central role in maximizing deductibility. One option is “bunching,” or consolidating multiyear commitments into a single tax year. By concentrating donations periodically, a corporation can surpass the 1% floor in those years and unlock greater deductible amounts. 

Beyond timing strategies, corporations could seek tax advice and analysis on whether any of their payments to charities are ordinary and necessary business expenses deductible under Section 162—such as advertising, event sponsorships, or certain commercial co-venturing arrangements.

Preparing for 2026 and Beyond | Corporate Charitable Giving Strategy

As the 2026 effective date approaches, C corporations should review their charitable giving programs with qualified tax advisors. Understanding how the Floor interacts with the Ceiling is essential for maximizing both charitable impact and available tax deductions. While the new rules add complexity to corporate tax planning, strategic approaches can help minimize the loss of deductions while maintaining support for worthy charitable causes.

The RJS LAW team of nonprofit attorneys, tax attorneys, international tax attorneys, and estate planning professionals can guide you through the new law’s complexities and tailor a plan that protects your business assets, reduces tax exposure, and aligns with your business goals. Whether you are creating a charity, restructuring your business, revising your estate plan, evaluating international holdings, or simply want comfort and security in a changing tax landscape, we are here to help you navigate the path forward and make sure you are taking full advantage of these new provisions.

The experienced attorneys at RJS LAW provide Tax Planning, Business Tax Planning, Tax Controversy, International Tax, Probate, Nonprofit, and Estate Planning Services. For a no-cost consultation, please contact us at 619-595-1655 or on the web at RJS LAW. 

Written by Chandara Diep, Esq., LL.M.