Equity Compensation Explained: RSUs, Stock Options and ESPPs

Many companies, especially in technology and other high-growth industries, pay employees partly in company stock. Equity compensation can be a powerful way to build wealth, aligning your interests with your employer’s success. But it also comes with complex rules, tax implications and risks. Understanding how different types of equity compensation work can help you make better decisions and avoid costly tax surprises.

Restricted stock units

Restricted stock units, or RSUs, are company shares you receive after meeting certain conditions, usually a vesting schedule based on continued employment. For example, RSUs might vest over four years, with a portion vesting each year or quarter.

When RSUs vest, the market value of the shares is generally taxed as ordinary income, just like your salary, and it appears on your W-2. Companies often withhold a portion of the shares to cover taxes, a practice sometimes called sell to cover or net share settlement.

However, withholding may not cover your full tax bill, especially at higher incomes. Companies often withhold at a flat supplemental wage rate that may be lower than your actual tax rate, which can lead to an unexpected tax bill at filing time. Planning ahead, such as by setting aside additional money or making estimated tax payments, can help avoid surprises.

After vesting, the shares are yours. If you hold them and later sell, any additional gain or loss is a capital gain or loss, with your cost basis equal to the value at vesting. Holding shares more than a year after vesting generally qualifies any further gain for long-term capital gains rates.

Nonqualified stock options

Nonqualified stock options, or NSOs, give you the right to buy company shares at a set price, called the exercise price or strike price, for a certain period. Options typically vest over time and expire after a set number of years.

If the company’s stock price rises above your exercise price, your options become valuable. When you exercise, meaning you buy the shares, the difference between the market price and your exercise price, called the spread, is generally taxed as ordinary income.

After exercising, if you hold the shares and later sell, any additional gain or loss is a capital gain or loss.

Incentive stock options

Incentive stock options, or ISOs, are a type of stock option that can receive more favorable tax treatment. If you meet certain holding requirements, generally holding the shares for more than two years from the grant date and more than one year from the exercise date, the entire gain when you sell may qualify for long-term capital gains treatment rather than ordinary income tax rates.

However, exercising and holding ISOs can trigger the alternative minimum tax, or AMT. The spread at exercise is generally treated as income for AMT purposes, even though it isn’t taxed as regular income. This can result in a significant tax bill in the year you exercise, even if you haven’t sold the shares. Planning carefully, such as by exercising a portion of ISOs each year, can help manage AMT exposure.

If you sell ISO shares before meeting the holding requirements, called a disqualifying disposition, the spread at exercise is generally taxed as ordinary income.

Employee stock purchase plans

Employee stock purchase plans, or ESPPs, let you buy company stock through payroll deductions, often at a discount from the market price, such as up to 15%. Some plans include a lookback provision, which bases the purchase price on the lower of the stock price at the beginning or end of the offering period, potentially increasing the discount.

Taxes depend on how long you hold the shares before selling. If you meet certain holding periods for qualified plans, part of the gain may be taxed as long-term capital gains. If you sell sooner, more of the gain may be taxed as ordinary income.

ESPPs can be a valuable benefit, since the discount provides an immediate potential gain. Some employees sell shares soon after purchase to lock in the discount while limiting exposure to their company’s stock.

Key decisions

Equity compensation involves several important decisions. When to exercise options depends on factors like the stock’s outlook, your cash flow, tax implications and expiration dates. Whether to hold or sell vested shares requires weighing potential future growth against the risk of holding a concentrated position. How to avoid having too much wealth in one company is crucial, since your salary, benefits and investments may all depend on your employer. If the company struggles, you could face both job loss and investment losses at the same time. And how to cover taxes, including potentially large tax bills from vesting or exercising, requires planning.

Diversification matters

Many financial advisers suggest limiting how much of your net worth is tied to a single company’s stock, including your employer’s. Regularly selling some vested shares and diversifying into a broad portfolio can reduce risk. While it can be tempting to hold shares of a company you believe in, history includes many examples of employees who lost significant wealth when their employer’s stock declined.

Get professional help

Equity compensation can be complex, with significant tax implications and long-term financial consequences. A tax professional or financial planner who specializes in equity compensation can help you understand your grants, plan exercises and sales, manage taxes and build a diversification strategy. Review your grant agreements and plan documents carefully, and keep track of vesting schedules, expiration dates and tax records.