Equity compensation — giving employees a stake in the company’s ownership and growth — has long been a cornerstone of executive and employee compensation at technology companies, startups, and increasingly at businesses of all types and sizes. For business owners, offering equity can be a powerful way to attract top talent, align employee interests with long-term business success, and conserve cash by substituting ownership for higher salaries. But equity compensation comes with a complex set of legal rules governing its tax treatment, its securities law implications, and its interaction with ERISA. Understanding the principal types of equity awards, how they are taxed, and where the legal risks lie is essential before any business owner begins distributing equity to employees.
Incentive Stock Options (ISOs)
An incentive stock option is a stock option that satisfies the requirements of Internal Revenue Code Section 422 and thereby qualifies for favorable tax treatment. ISOs can only be granted to employees — not to independent contractors, directors who are not employees, or consultants. They can only be granted under a formal written plan that has been approved by the corporation’s shareholders within twelve months before or after the plan is adopted.
The tax treatment of ISOs is the primary reason they are valued. When an employee exercises an ISO, they do not recognize ordinary income at the time of exercise, even if the stock is worth significantly more than the exercise price. Instead, the “spread” (the difference between the exercise price and the fair market value at exercise) is an adjustment item for purposes of the alternative minimum tax, but not for regular income tax purposes. When the employee later sells the stock, if they have held the stock for at least two years from the date of grant and at least one year from the date of exercise (the ISO holding period), the entire gain is taxed as long-term capital gain rather than ordinary income. This means that for employees in high income tax brackets, the potential tax savings from an ISO compared to a nonqualified stock option can be very substantial.
ISOs come with a number of requirements and limitations that restrict their utility. The exercise price of an ISO must be at least equal to the fair market value of the underlying stock on the date of grant. For a shareholder who owns more than 10 percent of the company’s stock, the exercise price must be at least 110 percent of fair market value and the term of the option cannot exceed five years. The aggregate fair market value of stock (determined at the time of grant) for which ISOs first become exercisable in any calendar year is limited to $100,000 per employee; options in excess of this limit are treated as nonqualified stock options. ISOs must be exercised within ten years of grant (five years for 10-percent shareholders) and typically must be exercised within three months of termination of employment to retain ISO status.
For private companies, determining the fair market value of the stock on the ISO grant date is a critical compliance issue. As discussed in the Section 409A article in this series, options granted with below-market exercise prices violate Section 409A. For ISOs, a below-market exercise price also disqualifies the option from ISO treatment. Private companies are expected to establish fair market value through a reasonable valuation method, and the IRS has provided safe harbors based on independent appraisals, formulas, and other approaches. Most venture-backed and startup companies obtain formal “409A valuations” from third-party valuation firms before each grant cycle to establish a defensible fair market value.
Nonqualified Stock Options (NSOs)
A nonqualified stock option — sometimes called an NQSO or NSO — is a stock option that does not satisfy the requirements for ISO treatment. NSOs can be granted to employees, directors, consultants, independent contractors, and other service providers. They are subject to fewer legal restrictions than ISOs but receive less favorable tax treatment.
When an NSO is exercised, the employee (or other optionee) recognizes ordinary income equal to the spread — the excess of the stock’s fair market value on the exercise date over the exercise price. This ordinary income is subject to income tax withholding (for employees) and payroll taxes. The employer receives a corresponding tax deduction for the amount included in the employee’s income. When the employee later sells the stock, any additional gain is capital gain (long-term or short-term, depending on the holding period), and any loss is a capital loss.
NSOs are generally simpler to administer than ISOs from a corporate standpoint because they are not subject to the $100,000 annual limit or the shareholder approval requirement. For employees who exercise and hold (rather than immediately selling), the ordinary income recognized at exercise creates a tax liability that may not be matched by immediate cash, which is a practical challenge for optionees in private companies where the stock cannot be easily sold to raise cash for the tax payment. Many private companies address this by providing net settlement arrangements (using some shares to cover the tax liability) or by offering cashless exercise mechanisms.
Restricted Stock Units (RSUs)
A restricted stock unit is not actually stock — it is a promise to issue stock (or pay the cash equivalent of stock) to the employee at a future date, typically after specified vesting conditions are satisfied. Unlike stock options, RSUs have value as long as the underlying stock has any positive value, even if the stock price never increases above the grant date value. This makes RSUs particularly attractive in compensation packages where the goal is to provide certain value rather than leveraged upside.
RSUs are subject to Section 409A if they defer settlement beyond the year in which they vest, unless they qualify for an exception (such as the short-term deferral exception, discussed in the Section 409A article). Most RSU plans are structured to settle within the short-term deferral window (within 2.5 months after the end of the tax year in which the RSU vests) to avoid Section 409A compliance requirements. Timing of settlement is a critical design issue in RSU plans.
The tax treatment of RSUs is straightforward: when the RSUs vest and the stock is delivered (or the cash equivalent is paid), the employee recognizes ordinary income equal to the fair market value of the stock received. The employer receives a corresponding deduction. Because RSUs deliver actual stock or cash upon vesting rather than requiring the employee to purchase stock at an exercise price, the employee does not face the cash flow challenge that stock option holders can face at exercise.
For public companies, withholding taxes on RSU vesting are typically handled through a net share settlement — the employer withholds a portion of the shares deliverable upon vesting to cover the tax obligation. For private companies, cash withholding from other compensation or other arrangements must be made to satisfy the withholding obligation, since the stock cannot easily be sold.
Restricted Stock and Section 83(b) Elections
An alternative to RSUs is an outright grant of restricted stock — actual shares that are subject to forfeiture if the employee does not satisfy specified vesting conditions. When restricted stock is granted, the employee does not recognize income until the restrictions lapse and the stock vests, unless they make a timely Section 83(b) election. Under Section 83(b), the employee can elect to include the fair market value of the restricted stock in income at the time of grant, rather than at vesting. If the stock subsequently increases in value, all of that appreciation is taxed as capital gain (rather than ordinary income) when the stock is sold.
A Section 83(b) election must be filed with the IRS within 30 days of the grant of restricted stock. Missing this deadline forfeits the opportunity irrevocably. For founders and early employees receiving restricted stock at a very low initial valuation, the Section 83(b) election is almost always advisable: the ordinary income recognized at grant is small (because the stock is worth little), and future appreciation is converted from ordinary income into capital gain. As companies grow and stock values increase, the difference in tax treatment between ordinary income rates and long-term capital gain rates becomes very significant.
Securities Law Considerations
Equity compensation programs implicate federal and state securities laws, which impose registration requirements on offers and sales of securities. Most equity compensation arrangements rely on federal exemptions from registration, particularly the Rule 701 exemption under the Securities Act of 1933, which exempts compensatory benefit plans maintained by non-reporting issuers (private companies). Rule 701 permits private companies to issue equity under written compensatory benefit plans to employees, directors, officers, partners, trustees, and certain consultants without registering the securities with the SEC.
Rule 701 has limitations: in any 12-month period, the aggregate sales price or amount of securities sold in reliance on Rule 701 cannot exceed the greater of $1 million, 15 percent of the total assets of the company, or 15 percent of the outstanding amount of the class of securities being offered. When total issuances in a 12-month period exceed $10 million, the company must provide financial statements and other disclosures to option holders. Companies that rely on Rule 701 should track issuances carefully and consult securities counsel when approaching the applicable limits.
ERISA and Equity Compensation: Key Intersections
The relationship between equity compensation and ERISA is more nuanced than many business owners realize. Pure equity compensation arrangements — stock options, RSUs, and restricted stock — that are structured as individual agreements with specific employees are generally not ERISA plans, provided they are not established pursuant to a general program that qualifies as a “pension plan” under ERISA’s definition. However, certain equity-based arrangements can implicate ERISA, and business owners should be aware of the key boundary lines.
Employee stock ownership plans, commonly known as ESOPs, are a specific type of defined contribution pension plan that is designed to invest primarily in employer stock. ESOPs are expressly covered by ERISA and by special provisions of the Internal Revenue Code, and they must be structured, administered, and funded in compliance with ERISA’s full suite of requirements. ESOPs used in leveraged buyout transactions, as succession planning vehicles, or as broad-based employee ownership programs are powerful tools but require specialized legal and financial expertise to implement correctly.
Phantom stock plans and stock appreciation rights plans, when structured as broad-based programs covering a class of employees over an extended period with defined future payment dates, can potentially be classified as ERISA pension plans if they result in a systematic deferral of compensation to or beyond termination of employment. The DOL’s guidance on this issue recommends structuring phantom equity and SARs as top-hat plans — plans maintained primarily for the purpose of providing deferred compensation for a select group of management or highly compensated employees — when ERISA application is a risk.
The intersection of equity compensation and the Section 409A nonqualified deferred compensation rules is perhaps the most immediately significant ERISA-adjacent issue. As discussed in the Section 409A article in this series, equity awards with below-market exercise prices and phantom equity arrangements with deferred payment features are subject to Section 409A’s requirements. Ensuring that equity compensation arrangements are properly structured to either comply with or be exempt from Section 409A is an essential component of any equity plan review.
Practical Guidance for Business Owners
Business owners who are designing equity compensation programs should approach the task with the assistance of qualified legal and tax counsel, ideally before a single grant is made. Selecting the right equity vehicle for the company’s situation — taking into account the company’s stage, capital structure, plans for growth and possible liquidity events, and the tax and incentive goals of the program — is a strategic decision with long-term implications.
Adopting a formal equity compensation plan, approved by the board and (for ISOs) by shareholders, that specifies the pool of shares available for issuance, the types of awards that can be made, the administrator of the plan, and the terms that will govern individual award agreements is an important foundational step. Operating an equity compensation program without a formal written plan creates ambiguity, undermines enforceability, and can create unexpected tax and securities law problems.
Maintaining a cap table that accurately reflects all outstanding equity awards, their grant dates, exercise prices, vesting schedules, and the identities of all holders is both a legal necessity and a practical imperative. In any transaction involving the company — a financing, an acquisition, or a restructuring — buyers and investors will scrutinize the company’s equity records carefully. Errors, inconsistencies, or missing documentation discovered during due diligence can delay or derail transactions and may require correction through expensive and time-consuming legal proceedings.