A closely held business is a corporation whose stock is concentrated in a small ownership group with no public market for shares. The IRS draws a specific line: five or fewer individuals owning more than 50% of the corporation’s stock value during the last half of the tax year.1eCFR. 26 CFR 1.542-3 – Stock Ownership Requirement That concentration triggers tax rules, governance obligations, and planning issues that never come up for public companies, and it applies whether the owners think of themselves as a family business, a founder-led startup, or a professional practice.
The IRS Ownership Test
The federal tax definition borrows the stock ownership test from the personal holding company rules in IRC Section 542(a). A corporation is closely held if, at any point during the last half of the tax year, more than 50% of its stock value sits with five or fewer individuals, directly or indirectly.1eCFR. 26 CFR 1.542-3 – Stock Ownership Requirement The classification then drives specific rules elsewhere in the Code, including the at-risk loss limitations under Section 465 and the passive activity loss rules under Section 469.2Office of the Law Revision Counsel. 26 U.S. Code 465 – Deductions Limited to Amount at Risk
The word “indirectly” does most of the work. Under the constructive ownership rules in Section 318, you are treated as owning stock held by your spouse, children, grandchildren, and parents. Stock held by partnerships, estates, trusts, and corporations you have an interest in can also be attributed to you proportionally.3Office of the Law Revision Counsel. 26 USC 318 – Constructive Ownership of Stock A company that looks widely held on the cap table can flip to closely held once family and entity attribution is applied. Owners who assume they fall outside the classification often find they are inside it.
A note on scope: the Securities and Exchange Commission does not use “closely held” as a formal category. Its registration thresholds under Section 12(g), as amended by the JOBS Act, require registration only if an issuer has 2,000 or more total holders of record or 500 or more non-accredited holders.4U.S. Securities and Exchange Commission. Jumpstart Our Business Startups Act Frequently Asked Questions About Section 12(g) Almost every closely held business is well below both numbers, so the SEC’s public-company reporting regime does not apply. It becomes relevant only if broad employee stock plans or repeated funding rounds push the holder count up.
C Corporation or S Corporation
The most consequential early decision for a closely held business is whether to remain a C corporation or elect S corporation status. A C corporation pays tax on its own income at the corporate level, and shareholders pay again when profits come out as dividends. An S corporation passes income and losses through directly to shareholders’ personal returns and avoids that second layer.
The S election is not open to every corporation. Under IRC Section 1361, the corporation cannot have more than 100 shareholders. Every shareholder must be an individual, a qualifying trust or estate, or a qualifying tax-exempt organization. Nonresident aliens cannot hold shares, and the corporation can issue only one class of stock.5Office of the Law Revision Counsel. 26 USC 1361 – S Corporation Defined The single-class rule catches businesses that want to give different investors different economic rights; that structure can create a second class and blow the election.
Making the election requires unanimous shareholder consent and must be filed by the 15th day of the third month of the tax year for which it takes effect.6Office of the Law Revision Counsel. 26 U.S. Code 1362 – Election; Revocation; Termination Miss the deadline and the election slides to the following year unless the IRS grants reasonable-cause relief. Businesses that distribute most of their earnings usually save meaningfully with the S election. Businesses that plan to retain large earnings for reinvestment may prefer the C structure, since S corporations pass through taxable income to shareholders even when the cash stays in the business.
Tax Traps for Closely Held C Corporations
C corporations that stay closely held draw scrutiny in three places the IRS considers ripe for abuse: how owners pay themselves, how much they retain in the company, and whether the company is really an operating business or a personal investment vehicle.
Reasonable Compensation
When owners also draw salaries, the IRS looks for compensation dressed up to disguise what is really a dividend. The standard is whether pay is reasonable for services actually performed. Factors include duties, business complexity, comparable wages at similar companies, and the corporation’s overall pay practices. Documentation matters: hours worked, board resolutions approving compensation, and industry benchmarking studies all help defend the number if challenged.
If the IRS finds compensation excessive, it reclassifies the excess as a nondeductible dividend. The corporation loses the deduction and may owe additional tax and penalties. The scrutiny runs the other direction for S corporations, where the IRS targets owner-employees who underpay themselves in salary and take most of their income as distributions to avoid payroll taxes.
Accumulated Earnings Tax
A C corporation that retains earnings beyond its reasonable business needs owes a 20% accumulated earnings tax on the excess.7Office of the Law Revision Counsel. 26 U.S. Code 531 – Imposition of Accumulated Earnings Tax The point of the tax is to stop shareholders from parking profits in the corporation to avoid the individual tax that would apply if the money were paid out as dividends.
Every C corporation gets a minimum credit. Most can accumulate up to $250,000 without triggering the tax. Corporations whose principal function is providing services in health, law, engineering, architecture, accounting, actuarial science, performing arts, or consulting get a lower credit of $150,000.8Office of the Law Revision Counsel. 26 USC 535 – Accumulated Taxable Income Retentions beyond those amounts have to be justified with specific, documented plans for capital expenditures, debt repayment, or expansion. General assertions about future growth will not carry the burden.
Personal Holding Company Tax
A separate 20% penalty tax applies to corporations that operate mainly as vehicles for passive investment.9Office of the Law Revision Counsel. 26 USC 541 – Personal Holding Company Tax A corporation is a personal holding company when two conditions are met at the same time: at least 60% of its adjusted ordinary gross income comes from passive sources such as dividends, interest, rents, royalties, and annuities, and five or fewer individuals own more than 50% of its stock value during the last half of the tax year.10Internal Revenue Service. Entities 5
Every closely held corporation already satisfies the ownership prong. So the income test is the only wall between it and the tax. Businesses that wind down operations while continuing to hold investments can drift into personal holding company status without noticing until the tax bill lands.
Passive Activity and At-Risk Rules
Closely held C corporations get one break the individual passive activity rules do not offer. Under Section 469, a closely held C corporation that is not a personal service corporation can use passive losses to offset active business income, though not portfolio income from investments.11Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited Personal service corporations do not get this benefit; they face the same limitations as individuals.
The at-risk rules in Section 465 add another cap. Losses from a trade or business are deductible only up to the amount the corporation has at risk, meaning cash contributed, the adjusted basis of property contributed, and borrowed amounts for which it bears personal repayment liability.2Office of the Law Revision Counsel. 26 U.S. Code 465 – Deductions Limited to Amount at Risk Nonrecourse debt with no personal exposure generally does not count. The rule exists to keep closely held corporations from claiming paper losses that exceed real economic exposure.
Governance Without a Public Market
In most closely held businesses, the owners and the managers are the same people. The CEO is often the largest shareholder. The board, if there is one, may be entirely family and co-owners. That overlap makes decisions fast. It also creates records gaps. Meetings run informally, decisions get made over the phone, and nothing gets written down. That works until a dispute erupts and no one can prove what was agreed.
Many states offer a formal alternative through the statutory close corporation election. That status, available to corporations with a small shareholder group (typically under 30 to 50, depending on the state), lets the company legally shed much of the formality that regular corporations must maintain. A statutory close corporation can dispense with its board entirely and have shareholders manage the business directly. Annual meetings become optional. Bylaws can be replaced by provisions in the articles of incorporation or a shareholder agreement. Because state law itself relaxes the formalities, courts are less likely to pierce the corporate veil for a failure to observe them.
Even without a formal election, closely held businesses should keep basic governance documentation. Written records of major decisions, compensation approvals, and related-party transactions provide protection if the IRS, a creditor, or a co-owner later questions how the business was run.
Buy-Sell Agreements
Without a public market, a closely held business needs a contractual path for handling ownership changes. The buy-sell agreement sets that path: who can buy a departing owner’s shares, what triggers a mandatory sale, and how the shares get valued. Common triggers include death, disability, retirement, divorce, and voluntary departure.
Two structures dominate. In a cross-purchase arrangement, each owner buys a life insurance policy on every other owner and uses the proceeds to buy the deceased owner’s shares. In an entity-purchase (or redemption) arrangement, the company owns the policies and redeems the departing owner’s shares. Cross-purchase agreements usually produce a better tax result because surviving owners get a stepped-up cost basis in the shares they acquire. They also become unwieldy as ownership grows, since each owner must carry a separate policy on every other owner.
Valuation is where these agreements either earn their keep or turn into a lawsuit. The agreement should specify a method: a formula tied to earnings multiples, book value, or an independent appraisal at the time of the triggering event. Formulas written years earlier can produce badly wrong results after the business has grown or contracted. Periodic reviews are worth the small cost. A right of first refusal, giving the company or the remaining owners the chance to match any outside offer, keeps unwanted third parties out of the ownership group.
Minority Shareholders and Majority Duties
Majority owners in a closely held business owe heightened fiduciary duties to the minority. Courts in many states treat these duties as closer to what partners owe each other, a standard of utmost good faith and loyalty that goes beyond what applies in a typical public corporation. The reason is practical. A minority owner in a public company who dislikes management can sell shares and walk away. A minority owner in a closely held business has no market and often no exit.
Minority shareholder oppression claims arise when the majority uses control to squeeze out or unfairly disadvantage the minority. Classic patterns include refusing to declare dividends while the majority pays itself generous salaries, terminating a minority owner’s employment to cut off their income from the business, and diluting the minority through below-market share issuances. States use different standards. Some ask whether the conduct was “burdensome, harsh, and wrongful.” Others apply a “reasonable expectations” test, looking at whether the majority frustrated legitimate expectations the minority had when they invested.
Remedies vary but generally include a court-ordered buyout of the minority interest at fair value, money damages, or in extreme cases judicial dissolution. A buyout is the most common outcome. Fair value in this setting usually means the minority’s proportional share of the company’s going-concern value, without discounts for lack of marketability or minority status; applying those discounts would reward the oppression the court is trying to remedy. A carefully written shareholder agreement, setting dividend policy, employment terms, compensation approval, and exit mechanisms in advance, prevents most of these disputes.
Estate Valuation
For most closely held owners, the business is the largest asset in the estate. How the interest is valued for estate tax purposes can decide whether the tax bill is manageable or forces a sale of the company. The federal estate tax exemption for 2026 is $15,000,000 per person, after Congress increased the amount under the One, Big, Beautiful Bill signed into law on July 4, 2025.12Internal Revenue Service. What’s New – Estate and Gift Tax Estates above the exemption face a top marginal rate of 40%.
The IRS values closely held business interests under a willing-buyer, willing-seller standard. Neither party is under compulsion, and both have reasonable knowledge of the relevant facts. The valuation weighs a fair appraisal of tangible and intangible assets including goodwill, the demonstrated earning capacity of the business, and comparable market data where available.13eCFR. 26 CFR 20.2031-3 – Valuation of Interests in Businesses
Two discounts commonly reduce the taxable value. A lack-of-marketability discount reflects that shares without a public market are harder to convert to cash. A lack-of-control (or minority) discount applies when the interest cannot exercise management authority or dictate dividend policy. Together they can meaningfully lower estate tax exposure, but the IRS challenges percentages it considers excessive, so the underlying appraisal must support the numbers.
Estates in which the closely held business interest exceeds 35% of the adjusted gross estate may qualify to pay the tax attributable to that interest in installments under IRC Section 6166, with a five-year deferral followed by up to ten annual installment payments. The provision exists because forcing an estate to pay a large tax bill immediately can require liquidating the business the owner spent a lifetime building. Qualifying requires planning well in advance, including records that demonstrate the business’s value relative to the total estate.