By Harry Prabandham · Updated September 28, 2026
Tax Planning
Selling Your Business: How Deal Structure Drives the Tax Bill
Deal structure sets the tax on a business sale: stock sales usually yield capital gain, asset sales can add ordinary income; QSBS may exclude some gain.
Selling Your Business: How Deal Structure Drives the Tax Bill
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What determines the tax on a business sale?
- The structure: selling stock or membership interests versus selling the company's assets changes how much gain is ordinary income versus capital gain.
- The entity type: C corporations, S corporations, and partnerships each have different results in an asset sale.
- Timing of payments, including notes and earn-outs, affects when gain is taxed.
- Your state of residence at the time of sale, and where the business operates, affect the state tax.
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What determines the tax on a business sale?
- The structure: selling stock or membership interests versus selling the company's assets changes how much gain is ordinary income versus capital gain.
- The entity type: C corporations, S corporations, and partnerships each have different results in an asset sale.
- Timing of payments, including notes and earn-outs, affects when gain is taxed.
- Your state of residence at the time of sale, and where the business operates, affect the state tax.
Asset sale or stock sale: what's the difference?
- In a stock sale, the seller generally has capital gain, taxed at long-term rates if held more than one year.
- In an asset sale, the price is allocated across assets; gain on items such as depreciated equipment or inventory can be ordinary income.
- Buyers often prefer asset purchases for a stepped-up basis in the assets, so structure and price are usually negotiated together.
- For a C corporation, an asset sale can mean corporate tax and then shareholder tax on liquidation.
Can QSBS exclude part of the gain?
- Section 1202 can exclude federal gain on qualifying C corporation stock acquired at original issuance.
- For stock issued after July 4, 2025: a cap of $15 million or 10x basis, a $75 million gross-asset test, and 50%, 75%, or 100% exclusion at three, four, and five years.
- Stock issued earlier keeps the prior rules: $10 million or 10x basis, a $50 million asset test, and a five-year hold.
- S corporation stock does not qualify, and California does not follow the federal exclusion.
How are installment sales and earn-outs taxed?
- Under Section 453, gain on seller financing is generally taxed as payments are received, but ordinary-income recapture is taxed in the year of sale.
- Notes need adequate stated interest, or part of the principal is recharacterized as interest taxed at ordinary rates.
- Earn-outs can qualify for installment treatment, but payments tied to continued employment risk being treated as compensation.
- Deferral means credit risk: if the buyer defaults, you may have paid tax on gain you never collect.
When do charitable strategies apply?
- Giving shares to a donor-advised fund or charitable remainder trust before the sale can avoid capital gains tax on the donated portion and create a deduction.
- Timing is critical: if the sale is already substantially certain, the IRS can tax the gain to you anyway.
- A charitable remainder trust pays income for life or a term of up to 20 years, then passes the remainder to charity, and gifts are irrevocable.
- These fit only when there is genuine charitable intent; the gift permanently reduces what stays with your family.
What about state tax and reinvestment?
- California taxes capital gains as ordinary income, with a top rate of 13.3% including the 1% surcharge on income over $1 million.
- Moving before a sale can change state tax only with a real change of domicile, and states scrutinize moves close to a closing.
- Opportunity zone investments can defer gain; the 2025 tax law's permanent version applies to investments made after 2026.
- A sale's proceeds also raise investment, estate, and cash-flow decisions that are easier to plan before signing.
Key takeaways
- Asset versus stock structure is often the largest single tax variable in a sale.
- QSBS, installment treatment, and charitable gifts each have strict timing and eligibility rules.
- State residency at the time of sale matters, and last-minute moves draw scrutiny.
- Bring your CPA and M&A attorney in early; Rubric coordinates portfolio decisions around their advice.
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