Published on November 17, 2025 by David Lim, CPA
Equity compensation has become a cornerstone of compensation packages at technology companies. If you work in tech, you’ve likely received grants of Restricted Stock Units (RSUs), Incentive Stock Options (ISOs), or Non-Qualified Stock Options (NSOs). Understanding how these equity awards work and their tax implications can make a significant difference in your financial planning.
Restricted Stock Units (RSUs): The Basics
RSUs represent a company’s promise to deliver shares of stock to you in the future. Unlike stock options, you don’t purchase RSUs. Instead, they vest over time according to a predetermined schedule, and when they vest, you receive actual shares of company stock.
How RSUs Work
- When your company grants you RSUs, you receive a promise of future stock rather than actual shares. The grant date marks when you receive this promise, but you won’t own the shares until they vest. Most tech companies use a four-year vesting schedule, though the structure can vary significantly.
- Traditional vesting schedules: Distribute 25% of your RSUs each year over four years.
Tax Treatment of RSUs
- RSUs are taxed when they vest. The fair market value at vesting becomes ordinary income (shows in Box 1 of your W-2).
- Most employers withhold 22% for taxes, but high earners may owe more.
- After vesting, gains or losses when you sell are taxed as capital gains (holding >1 year = long-term rates).
Managing RSU Windfalls
- Sell immediately to limit single, stock risk and diversify.
- Hold shares if you want potential appreciation, but beware of concentrated risk (don’t let employer stock exceed 10–20% of net worth).
Incentive Stock Options (ISOs): Tax-Advantaged But Complex
The ISO Timeline
| Grant Date | Vesting Date | Exercise Date | Sale Date |
| 📅 | 🔓 | 💵 | 🛒 |
| Options given | Rights earned | Shares purchased | Shares sold |
- ISOs can provide tax advantages – but only if you follow the rules closely.
- Sometimes, employees need to sell their ISO shares before meeting the IRS holding requirements for favorable long-term capital gains treatment. This is known as a non-qualifying (disqualifying) disposition. It often happens if you need liquidity soon after exercising options or if you want to manage risk during volatile market conditions. Although a disqualifying disposition forfeits the special tax advantage of ISOs, it can be a practical choice, especially if you’re concerned about share price drops or if you have a large tax bill due to the Alternative Minimum Tax (AMT).
- In a non-qualifying disposition, the IRS requires you to report part of your gain as ordinary income, and only the remaining appreciation is treated as capital gain. This makes your overall tax bill higher compared to a qualifying disposition, but it can sometimes mean paying tax sooner and minimizing risk from holding concentrated shares.
- Vesting: Often four years with a one-year cliff.
Tax Treatment: Qualifying vs. Disqualifying Dispositions
| Qualifying Disposition | Non-Qualifying Disposition | |
| Definition | Shares sold ≥2 years after grant and ≥1 year after exercise | Shares sold <2 years from grant or <1 year from exercise |
| Tax Treatment | All gain taxed as long-term capital gain | Spread between exercise price and market price at exercise is taxed as ordinary income; remainder is capital gain |
| Example | Granted 1/1/2021, exercised 3/1/2022, sold 4/15/2023 | Granted 1/1/2021, exercised 3/1/2022, sold 1/1/2023 |
| Reporting | Only capital gains reported (Schedule D) | Ordinary income reported on W-2, capital gain/loss reported (Schedule D) |
| Advantage | Lower tax rates (long-term) | Higher tax rates (short-term ordinary income) |
The Alternative Minimum Tax (AMT) Trap
- When exercising ISOs and holding shares, the spread triggers AMT, not regular tax.
- The AMT is calculated in parallel, and some face huge initial tax bills – even if shares drop later.
- You receive a minimum tax credit if you trigger AMT, usable in future years.
- Tip: Exercise when the spread is small or early in the year for more tax flexibility.
Non-Qualified Stock Options (NSOs): More Flexible, Different Tax Treatment.
NSOs offer versatility but less favorable tax handling than ISOs.
How NSOs Work
- You can exercise NSOs to purchase shares at a set price.
- When you exercise, the spread is taxed as ordinary income and reported on your W-2.
- Employers typically withhold at 22%, but your liability may be more.
NSO Tax Strategy
- Once exercised, your basis = exercise price + income recognized.
- Hold for >1 year after exercising – future gains are long-term capital gains.
- Timing exercises (during lower-income years or staggering) can manage overall taxes.
Planning for Success
- Equity compensation is an opportunity – if you plan right.
- Understand your equity type and timing.
- Consult a CPA or tax advisor familiar with tech compensation.
- Having a clear strategy can save thousands in taxes.
This article is for general educational purposes only and does not constitute tax advice. Tax laws change frequently, and each situation is unique. Consult a qualified tax professional before acting on any information in this article.Have questions about this topic? Contact me.