Quick answer

Selling an inherited business usually produces capital gain measured from the fair market value (FMV) at the decedent’s date of death (the “step‑up” in basis) to the sale price. However, the tax picture can be layered: part of the proceeds can be ordinary income (depreciation recapture, inventory, receivables), some can be capital gain (goodwill, most capital assets), and entity type (C corporation vs. S corp/partnership) changes who pays what and when. State taxes and the 3.8% Net Investment Income Tax (NIIT) can add additional liability.

Below I walk through how to determine what you’ll owe, practical steps to reduce taxes, and common traps I see in practice from advising heirs and executors.

How to determine your taxable gain

  1. Establish the correct basis (start here)
  • Most inherited business assets receive a stepped‑up (or stepped‑down) basis equal to their FMV on the decedent’s date of death (or, in certain estate tax elections, the alternate valuation date). That new basis is your starting point for calculating gain when you sell (IRS Topic No. 703 on basis explains this principle).
  • Special cases: community‑property states may step up both spouses’ shares; property distributed from an estate may use a value at distribution; partnership interests may require a different analysis.
  1. Asset sale vs. ownership (stock/interest) sale
  • Asset sale: The buyer purchases individual business assets (equipment, inventory, goodwill). You and the buyer allocate price among asset classes — that allocation determines how much is treated as ordinary income (e.g., inventory, receivables, and depreciation recapture on Section 1245 property) vs. capital gain (goodwill, certain intangible assets).
  • Ownership sale: Buyer purchases stock or membership interests. The seller typically recognizes capital gain equal to sales proceeds minus the seller’s basis in the interest. For C corporations there can be double taxation (corporate gain + dividend); for pass‑through entities the tax flows to the owner(s).
  1. Depreciation recapture and ordinary income
  • When inherited business assets include depreciable property, sale may trigger depreciation recapture. For personal property and most equipment (Section 1245), recapture is taxed as ordinary income to the extent of prior depreciation. For real property there are unrecaptured Section 1250 rules that can carry a higher capital gains rate up to 25% on the recaptured amount.
  1. Reporting the gain
  • Individual sellers report gains on Schedule D and Form 8949 (capital gains and losses). If you receive installment payments, you may be able to report gain over time under Section 453 (installment sale rules), smoothing tax liability (exceptions apply for inventory, dealer property, and closely held corporations).
  1. Net Investment Income Tax and state taxes
  • High‑income sellers may owe the NIIT (3.8%) on net investment income, including many sales of inherited businesses. State income tax rates and rules vary; factor state liability into planning.

Notes and sources: See IRS Topic No. 409 (capital gains) and the NIIT guidance on the IRS site for current thresholds and filing rules (irs.gov).

Practical examples (simple, realistic illustrations)

Example 1 — straightforward stepped‑up basis

  • FMV at death (stepped‑up basis): $800,000
  • Sale price 3 years later: $900,000
  • Taxable gain: $100,000 (generally long‑term capital gain if held over a year)

Example 2 — asset sale with recapture

  • Inherited business had equipment with a stepped‑up basis equal to FMV at death. If the equipment is sold for more than that FMV, gain above the stepped‑up basis is treated as capital gain; depreciation recapture typically does not arise for heirs if the basis equals FMV at date of death — but ordinary income recapture can apply in other scenarios (e.g., if the estate had depreciated the asset between death and sale). Always check whether the estate or estate executor took depreciation deductions after death.

I see confusion here often: heirs assume that every dollar above the decedent’s original cost basis is recaptured — that’s wrong. The correct comparison is to the stepped‑up basis, not the decedent’s historic price.

Common pitfalls I’ve encountered in practice

  • Missing or weak valuation documentation: A defensible FMV at death is crucial. Weak valuations invite IRS challenge and increase audit risk.
  • Overlooking entity tax consequences: Selling a C corporation’s assets can generate tax at the corporate level and then again when proceeds are distributed to shareholders. In some sales, converting structure or negotiating an ownership sale can materially change taxes.
  • Failing to consider timing: A sale in a high‑income year can push you into NIIT or higher capital gains brackets. Timing can matter — spreading income across years or using installment sales can help.
  • Ignoring state tax: Many heirs forget state income tax, which can materially change net proceeds.

Planning strategies that often help

  • Get a valuation early and document assumptions: Formal business appraisals reduce uncertainty and aid estate administration.
  • Analyze asset allocation in the purchase agreement: If you’re the seller, work with buyer counsel to agree on an allocation favorable to your tax outcome (but allocations must be commercially reasonable).
  • Consider an installment sale: Spreading receipts over years can keep income below NIIT or into lower tax brackets.
  • Charitable planning: Donating appreciated business interests (or using a charitable remainder trust) can provide income, tax deferral, and charitable deductions. This is complex — coordinate with counsel.
  • Partnership Section 754 election: If the inherited interest is in a partnership, a Section 754 election (if timely made by the partnership) may adjust inside basis and reduce future taxable gains for the inheritor. Discuss this with the partnership and your tax advisor.

When estate tax matters

  • Federal estate tax applies only when an estate exceeds the federal exclusion amount; many estates are below that threshold. If estate tax was paid, the estate’s executor may have elected alternate valuation dates or used estate deductions that affect basis — review estate tax returns and accounting.
  • Whether estate tax was owed does not change the stepped‑up basis rule, but estate‑level planning can affect liquidity and timing of a sale. See IRS estate and gift tax guidance for rules and filing requirements.

Required documents and steps to take now

  • Obtain the business valuation used for estate administration and any estate tax returns (Form 706) if filed.
  • Collect financial statements, depreciation schedules, vendor/customer contracts, and recent appraisals.
  • Confirm the entity type (C corp, S corp, LLC/partnership) and get help from an experienced CPA and an M&A or tax attorney.
  • If you plan to sell, model both asset and ownership sale scenarios — net proceeds differ.

Useful resources and further reading

Internal FinHelp links you may find helpful:

Final notes and disclaimer

This article is educational and reflects common outcomes and planning considerations as of 2025. Tax laws, rates, and thresholds change; your situation may have state‑specific or entity‑specific nuances that materially alter the outcome. For personal, binding advice, consult a CPA or tax attorney who can review the business valuation, entity documents, and the estate’s tax filings before you proceed.