Equity Compensation Overview: ISOs, RSUs, AMT, and Multi-Year Planning

Stock options, RSUs, and restricted stock create a distinct set of tax challenges that generalist tax preparation won't handle. From identifying grant types and timing exercises to managing AMT exposure and diversifying concentrated positions, equity compensation demands proactive, multi-year planning.

Why it's different from regular income. Your salary hits one tax rate on one schedule. Equity comp can trigger ordinary income tax, capital gains tax, and the Alternative Minimum Tax, sometimes in the same year, depending on what type of grant you have and when you exercise or sell.

The major planning areas:

• Grant type identification. ISOs, NSOs, RSUs, RSAs, and ESPP shares each have their own tax treatment. Mixing up the rules between them is one of the most common and expensive mistakes.
• Exercise and sale timing. When you exercise options or sell vested shares affects whether gains are taxed as ordinary income or capital gains. The difference can be 20+ percentage points in tax rate.
• AMT exposure. Incentive stock options can trigger the Alternative Minimum Tax even when you haven't sold anything or received any cash. People have owed six-figure AMT bills on paper gains that later evaporated.
• Concentration risk. Holding too much of your net worth in one stock is a financial risk. Diversifying has tax consequences that need to be planned.
• Liquidity events. An IPO or acquisition changes everything: lockup periods, new selling windows, and sudden taxable events.

What a CPA does here: They model the tax impact of exercise-and-sell scenarios across multiple years, coordinate with your financial advisor on diversification timing, and prevent surprises at filing time. A generalist files the forms correctly after the fact but won't help you plan the sequence.

The tradeoff: Equity comp planning is most valuable before you make decisions. If you've already exercised and sold, a CPA can still optimize what's left, but the biggest savings come from planning ahead.