Understanding Your W-2 When You Have Stock Options or RSUs

Why Equity Compensation Complicates Your W-2

If you received Restricted Stock Units (RSUs) that vested or exercised Non-Qualified Stock Options (NQSOs) during the year, your W-2 will look different — and potentially much larger — than you expected. Understanding where this income appears and how it's taxed prevents unpleasant surprises at filing time.

RSUs (Restricted Stock Units)

What Happens at Vesting

When RSUs vest, you receive shares. The fair market value of those shares on the vesting date is ordinary income — taxed exactly like salary. Your employer withholds taxes (usually by selling some shares to cover withholding) and reports the income on your W-2.

Where It Appears on Your W-2

Box 1 (Wages): RSU income is included here. If you vested $50,000 in RSUs, your Box 1 is $50,000 higher than your base salary.
Box 3 and Box 5: RSU income is also subject to Social Security and Medicare taxes — included here up to applicable limits.
Box 14: Many employers add a line labeled "RSU" or "ESPP" showing the income amount separately for your reference. This is informational — the income is already in Box 1.
Box 12, Code V: If you exercised Non-Qualified Stock Options, the spread (difference between exercise price and FMV) appears here and is included in Box 1.

The Supplemental Rate Trap

Many employers withhold federal tax on RSU income at the supplemental rate (22% for amounts up to $1M, 37% above). If your effective marginal rate is higher than 22%, you'll owe additional tax. If you vested large RSU grants and your combined income is in the 32–37% bracket, you may owe significantly more at filing — plan ahead.

Non-Qualified Stock Options (NQSOs)

What Happens at Exercise

When you exercise NQSOs, the "spread" — the difference between the exercise price and the current fair market value — is ordinary income. Your employer reports this on your W-2 regardless of whether you sell the shares.

Example: Option exercise price $10/share, FMV at exercise $60/share, 1,000 shares exercised. Spread = $50,000 — this is ordinary income on your W-2 whether you hold the shares or sell immediately.

Box 12, Code V

NQSO exercise income appears in Box 12 with code V. This is already included in Box 1 — Box 12, code V is informational, helping you reconcile your brokerage 1099-B with your W-2 for basis calculations when you eventually sell.

Incentive Stock Options (ISOs): Different Treatment

ISOs are taxed differently — the exercise spread is NOT on your W-2 as ordinary income (though it may trigger AMT). However, if you did an immediate "disqualifying disposition" (sold the stock within 1 year of exercise or 2 years of grant), the spread IS on your W-2. Check Box 14 for any ISO disqualifying disposition notation.

Your Basis After Vesting or Exercise

Critical for when you sell the shares: your tax basis is the FMV at vesting (RSU) or the FMV at exercise (NQSO) — not zero, not your exercise price. If your brokerage reports basis incorrectly on your 1099-B, you could double-pay tax. Reconcile your W-2 equity income against your brokerage statements every year you have equity transactions.

Parse Your W-2 Equity Income

Upload your W-2 to parsew2.com to extract all fields including Box 12 codes and Box 14 annotations — making it easy to identify and correctly report RSU vesting income, NQSO exercise amounts, and other equity compensation components.