Charitable Planning Before Selling Your Business: 2026 Guide

Not tax or legal advice — every business sale involves entity type, deal structure, and timing variables that require a specialist. Use this as a framework before engaging an advisor.

Why timing is everything: the assignment of income doctrine

The IRS has long-established that income "assigned" to another person or entity is still taxable to the original earner if the assignment happens after the right to receive that income has vested. Applied to business sales, this means:

• If you donate company stock before any legally binding commitment to sell, the charitable vehicle receives the proceeds — no capital gain to you.
• If you sign a purchase agreement and then donate stock (or proceeds), the IRS will treat the gain as yours regardless of where the cash goes.

The practical safe harbor: complete the charitable transfer well before you sign a letter of intent, term sheet, or purchase agreement. The more specific and binding the pre-sale documents, the higher the risk that even a pre-signing transfer will be challenged under assignment of income principles.

Courts have generally found that a completed gift of stock — formal transfer on company books, acceptance by the receiving charity — done before a legally binding commitment satisfies the rule.¹ But cases turn on specific facts, and "well before" is safer than "one day before."

The tax math: what's actually at stake

Assume you own a business with $200,000 cost basis that will sell for $10,000,000. You want to give 10% of proceeds to charity — approximately $1,000,000.

The pre-sale approach saves approximately $238,000 in federal capital gains tax on this example (23.8% × $1M avoided gain). State taxes add to this in high-tax states — California adds another 13.3%, bringing the combined avoided tax to $371,000 on the same gift. That's a 37% improvement in charitable impact from the same gross asset.

Note: these numbers use a simplified allocation. Your actual tax depends on entity type, deal structure (asset sale vs stock sale), state residency, installment sale treatment, and ordinary vs capital income components.

Vehicle comparison: DAF, CRT, private foundation

Donor-Advised Fund (DAF)

For most business owners, a DAF is the simplest and most flexible vehicle:

• You transfer stock before the sale; DAF sponsor sells after closing
• Deduction is FMV at the time of transfer (requires a qualified appraisal — see below)
• AGI limit: 30% of AGI for long-term appreciated property; 5-year carryforward for excess
• Funds held in the DAF can be invested and granted out over time — immediately, or over 5–20 years
• DAF sponsor must agree to accept closely-held stock before transfer; major sponsors (Fidelity Charitable, Schwab Charitable, Vanguard Charitable) accept it but review each situation

Best for: donors who want simplicity, flexibility on grant timing, and no ongoing administrative burden. See our DAF strategy guide for full mechanics.

Charitable Remainder Trust (CRT)

A CRT converts a low-basis asset into a lifetime income stream plus a charitable gift. For business stock:

• You transfer stock to the CRT before the sale
• The CRT sells at close (tax-free) and reinvests proceeds
• You receive an income stream for life (or a term up to 20 years) — typically 5–8% of assets annually
• Remainder goes to charity at end of trust term
• You get an immediate partial charitable deduction equal to the present value of the charitable remainder (often 25–50% of initial value)
• Capital gains tax on the sale is deferred into the trust and distributed to you according to the four-tier accounting rules over the income period

Best for: business owners who want to replace the income from a sale with a diversified, managed income stream, while achieving a charitable legacy. Particularly attractive when you're selling a large, low-basis position and concerned about sustaining income post-sale. See our CRT design guide and CRT calculator.

Private Foundation

For business owners planning a multi-decade family philanthropic legacy:

• Fund with stock pre-sale (same assignment of income timing rules apply)
• Deduction limit: 20% of AGI for appreciated property (lower than DAF's 30%)
• 5% annual distribution requirement of net investment assets
• Family maintains full control over grant-making
• Administration costs typically $15,000–$50,000/year

Best for: business owners contributing $5M+ to charity who want family governance and naming rights. Often paired with a DAF for immediate grant flexibility. See our private foundation guide.

Entity-type considerations

C-corporation stock

Most straightforward for pre-sale charitable gifts. Long-term C-corp stock held more than one year qualifies for the full FMV deduction as long-term capital gain property. The DAF or CRT receives the stock, participates in the sale, and you exclude the donated portion's capital gain from your income.

S-corporation stock

S-corp stock donated to a DAF or charity creates a complication: once the charity holds S-corp stock, income flowing through it is treated as Unrelated Business Taxable Income (UBTI) under IRC §512(e).² DAF sponsors and charities holding S-corp stock pay corporate tax rates on their share of S-corp income. This significantly reduces the benefit. If your business is an S-corp:

• Pre-sale conversion to C-corp (requires planning well in advance — typically 5+ years for clean tax treatment of appreciated assets under §1374 built-in gains rules)
• Charitable planning via cash after sale, with bunching and deduction management
• Installment sale structures combined with charitable gifting of installment note income

S-corp donors should engage an advisor early — ideally 2–5 years before a sale — to preserve the most options.

Partnership interests (LLC)

Donations of partnership interests to a DAF or CRT are possible but complex. The receiving entity steps into your economic position in the partnership, which may include debt, recapture income, or ordinary income components. DAF sponsors scrutinize these carefully. Most require the partnership interest to be unencumbered by debt (because charitable remainder interests in debt-laden entities create issues under IRC §514).

The qualified appraisal requirement

For donations of closely-held stock or partnership interests worth more than $5,000, IRC §170(f)(11)(C) requires a qualified appraisal by a qualified appraiser completed no earlier than 60 days before the gift date and no later than the due date of your tax return (including extensions) for the year of the donation.³

• A "qualified appraiser" must meet specific IRS requirements — typically a credentialed business valuation professional (ASA, CFA, CVA, or equivalent)
• The appraisal must be conducted before the binding sale agreement, using methods appropriate for going-concern valuation, not the impending deal price (though deal context is often relevant to FMV)
• You must attach Form 8283, Part II (Section B) to your tax return, with the appraiser's signature
• The DAF sponsor or charity trustee also signs Part II, acknowledging receipt

The IRS has challenged charitable deductions for pre-sale stock gifts when the claimed FMV exceeded the eventual sale price. Work with your M&A advisor and appraiser to document the valuation basis clearly.

Year-of-sale charitable planning: coordinating everything

A business sale is often your highest-income year in life. This creates unusual opportunities to stack charitable strategies:

• Pre-sale stock gift: Eliminates capital gains on donated shares
• Large DAF contribution in sale year: Deduction against peak income; grants can flow to charities over 10+ years
• Roth conversion in the same year: Charitable deduction partially offsets Roth conversion income — turning a peak-tax year into a single efficient planning event
• Bunching 5+ years of giving into one DAF deposit: Itemized deduction vs. standard deduction breakeven in normal years; in a sale year you itemize anyway

Example: A business owner in the 37% bracket with a $9M gain from sale, $1M pre-sale stock gift to DAF, and $500K Roth conversion. The $1M deduction offsets $1M of ordinary income at 37%, saving $370,000 in ordinary income tax — on top of the $238,000 in capital gains tax avoided by the pre-sale gift structure. Total benefit: $608,000 vs. selling first and then donating.

Process and timeline

1. Engage a charitable planning specialist. The assignment of income timing risk requires coordinating the gift with your M&A attorney, accountant, and charitable advisor simultaneously. Ideally begin this planning 6–18 months before a sale.
2. Identify the charitable strategy. DAF (simplest), CRT (income-replacement), foundation (family legacy). Most business owners use a DAF.
3. Get a business valuation. Your appraiser needs to establish FMV of the donated shares before the binding sale agreement is signed.
4. Contact the DAF sponsor. Major sponsors review closely-held stock gifts individually. Provide financial statements and business valuation. Get written acceptance before proceeding.
5. Execute the stock transfer. Legal transfer of shares to the DAF (or CRT trust), recorded on the company's stock ledger. This is your gift date — it must occur before any binding acquisition documents.
6. Proceed with the M&A transaction. The DAF's shares are now included in the sale. The DAF receives its proportion of sale proceeds tax-free.
7. File Form 8283. Attach the qualified appraisal and Part II of Form 8283 to your federal return for the donation year.

Common mistakes

• Donating after signing the LOI. The riskiest mistake. If a court finds the sale was substantially certain at the time of gift, the capital gains are assigned back to you under the assignment of income doctrine.
• Using an unqualified appraiser. IRS has denied deductions when appraisals were done by the company's accountant rather than a credentialed business valuation specialist.
• Transferring to a DAF sponsor that won't accept closely-held stock. Verify acceptance in writing before committing. Some community foundations and smaller sponsors decline.
• Not getting carryforward right. If the 30% AGI limit means you can't use the full deduction in year one, the 5-year carryforward lets you spread it — but this requires planning your future income to actually absorb it.
• S-corp shareholders overlooking UBTI. A seemingly clean pre-sale gift can result in the DAF sponsor refusing to accept, or paying significant UBTI, eliminating most of the expected benefit.
• Waiting until after closing to start the conversation. Post-closing, the window for capital-gains-efficient charitable planning has closed. Cash gifts still provide deductions but lose the gain-avoidance component.