Capital Gains Tax on a Business Sale

Once you sign a business sale, the tax outcome is mostly arithmetic. Before you sign, it is a series of decisions, and the biggest one is whether the deal is structured as an asset sale or a stock sale. That single choice determines whether depreciation recapture eats part of your gain, whether the Section 1202 QSBS exclusion is even on the table, and how much of the price lands in the favorable long-term capital gains rate versus ordinary income.

The deadline for that decision is the signed purchase agreement, not the closing date. Most buyers arrive already assuming an asset sale, because it gives them a depreciation step-up. If a stock sale matters to you, that has to be raised during negotiation, not during diligence after the letter of intent is signed.

In an asset sale, you sell the individual assets: equipment, inventory, customer lists, real estate, intellectual property, and goodwill. The buyer gets a step-up in basis for future depreciation, which is why buyers push for this structure. You recognize gain on each asset category at its own rate, some at favorable capital gains rates, some as ordinary income.

In a stock sale, the buyer purchases the entity itself. The buyer assumes the entity's liabilities and contracts, your entire gain is generally long-term capital gain if held more than a year, and if you hold qualifying C corporation stock, Section 1202 can exclude some or all of it. The buyer does not get a basis step-up, which is why sellers sometimes accept a modestly lower price to get this structure.

A real-world pattern: a $3M service business sold as an asset deal might allocate $1.5M to goodwill, $800K to equipment, $500K to inventory, and $200K to client lists. Goodwill and client lists are long-term capital gain. The equipment triggers depreciation recapture at ordinary rates. The inventory gain is ordinary income. Three different rates inside one transaction, which is exactly why allocation (covered in Section 5) matters as much as the headline price.

Business sale tax planning works backward from the signing date, not the closing date. The structural decisions, entity type, QSBS eligibility, loss harvesting opportunities, need the most runway. The deal mechanics, allocation and installment terms, get negotiated in the final months. After signing, you are largely executing what was already agreed.

If you are inside six months of a signed deal already, skip to Sections 4 through 8: the worked example, allocation mechanics, and documentation checklist are still fully actionable. If you are 18 months or more out, the entity structure conversation in Section 6 deserves a real look before you talk to buyers.

Hypothetical, illustrative round numbers. You own a digital marketing agency, held eight years, and a larger firm offers $2M in cash. To run your own gain, income, and state numbers, use our capital gains tax calculator alongside this example.

Selling a medical or dental practice runs the same math with its own allocation and entity quirks. See our dedicated guide to taxes on selling a medical practice.

In an asset sale, the buyer and seller must agree on how the total price is allocated among the acquired assets, and both report the same allocation to the IRS on Form 8594, the Asset Acquisition Statement required under Section 1060. The allocation follows a residual method across seven asset classes, from cash and marketable securities (Class I and II) through accounts receivable (Class III), inventory (Class IV), other tangible and intangible assets (Class V and VI), down to goodwill and going-concern value, which absorbs whatever price is left over (Class VII).

Your incentives and the buyer's often align more than you would expect: the buyer wants amortizable intangibles (15-year deductions under Section 197), and you want the same assets (capital gain rates). The disagreement usually centers on equipment and non-compete value, where the buyer's tax preference and yours diverge.

Installment sales. Instead of collecting the full price at closing, you take payments over several years and recognize the gain proportionally as you receive them. This may spread eligible gain across tax years, but it also means taking on buyer credit risk, charging at least the Applicable Federal Rate on the note, and accepting that depreciation recapture is still recognized in full in the year of sale regardless of the payment schedule. The mechanics, the AFR requirement, and when this structure makes sense are covered in full on our installment sale tax guide; this page just flags it as a lever to raise during negotiation.

QSBS awareness. Section 1202 lets eligible founders exclude up to $10M (or 10x basis, whichever is greater) of gain on Qualified Small Business Stock, and up to $15M for stock issued after July 4, 2025 under the 2025 tax law. This is a permanent exclusion, not a deferral, and excluded gain also escapes the 3.8 percent NIIT.

If your business is an LLC or S corp and your exit is five or more years away, converting to a C corporation can start the QSBS clock on newly issued stock. If your exit is sooner, this section is mostly a flag to raise with your CPA rather than a strategy you can implement mid-negotiation.

Every piece below feeds a specific calculation: basis, QSBS eligibility, or the recapture exposure on your depreciation schedule. Missing documentation does not stop the sale, but it does mean your CPA is estimating instead of confirming, which is exactly where tax surprises come from.

If QSBS is on the table, add board minutes approving the original stock issuance and any records showing the company's gross assets at the time of issuance, since the $50M (pre-OBBBA) or $75M (post-OBBBA) test is measured at that point, not at sale.