NSOs/NQSOs: Tax at Exercise and Tax at Sale

A nonqualified stock option can create two different kinds of taxable income.

First, exercise can create compensation.

Then the shares acquired through the exercise can create a capital gain or loss when they are sold.

The mistake is treating those two events as one.

Is an NSO taxed at grant?

For a conventional employee NSO, grant generally does not create income because the option usually does not have a readily ascertainable fair market value under Treas. Reg. §1.83-7.

Vesting alone also generally does not create the standard NSO income event.

For the conventional option, exercise is the key point.

Tax at exercise

The ordinary compensation amount is generally:

exercise-date FMV − exercise price

Suppose an employee exercises 1,000 options:

• strike price = $10;
• exercise-date FMV = $30.

Exercise cost:

$10,000

Stock value:

$30,000

Compensation:

$20,000

For an employee, that compensation generally enters Form W-2 reporting.

Box 12 code V can identify income from exercise of a nonstatutory stock option.

What is the stock basis?

The compensation already recognized generally becomes part of basis.

In the example:

$10,000 exercise price + $20,000 compensation = $30,000 basis

If the shares are later sold for $35,000:

$35,000 − $30,000 = $5,000 capital gain

Using only the strike price as basis would effectively tax the $20,000 spread again.

When does the holding period begin?

The stock holding period generally begins when the employee acquires the shares through exercise.

The option's grant or vesting period is not automatically part of the stock's capital-gain holding period.

Broker basis can be incomplete

Compensatory-option reporting rules can cause Form 1099-B basis to differ from the taxpayer's substantive basis.

The taxpayer should reconcile:

• exercise confirmation;
• Form W-2;
• Form 1099-B;
• supplemental broker statement.

Do not assume the broker has incorporated the compensation amount into reported basis.

Cashless exercise and same-day sale

A cashless exercise can compress several steps into one brokerage workflow:

exercise → compensation → stock acquisition → sale

The fact that the employee never personally wires the exercise price does not erase the exercise.

If stock is actually acquired and sold, the compensation event and stock disposition remain separate tax layers.

This distinction becomes especially important in private-company liquidity events.

Private-company NSOs and Section 409A

A private-company stock option can generally avoid Section 409A deferred-compensation treatment when the applicable stock-right exemption requirements are satisfied, including an exercise price not below grant-date fair market value.

A discounted option can create a Section 409A problem.

A preferred-stock financing price should not automatically be treated as the common-stock value used for option purposes.

See Private-Company Equity, Tender Offers, and Liquidity Events.

Multi-state NSOs

NSOs are a strong example of why state sourcing cannot be reduced to the exercise date.

New York and California can use different allocation frameworks for nonresident option compensation.

The federal spread may be clear while the state allocation remains fact-specific.

See Multi-State Equity Compensation: Which State Taxes RSUs, Options, and Stock Sales?

Common NSO mistakes

Watch for:

• assuming the option is taxed at grant merely because it has economic value;
• forgetting the exercise spread is compensation;
• using strike price alone as stock basis;
• starting the stock holding period at grant;
• assuming Form 1099-B basis includes the W-2 compensation;
• treating cashless exercise as a single undifferentiated tax event;
• assuming private-company options are automatically outside Section 409A;
• sourcing all option income to the state of residence on exercise day.

Related pages

• Equity Compensation Cost Basis: How Double Tax Reporting Happens — reconcile exercise compensation with the stock basis.
• Equity Compensation Withholding: Why the Amount Withheld May Not Equal Your Tax — understand payroll withholding on the exercise spread.
• Private-Company Equity, Tender Offers, and Liquidity Events — analyze Section 409A, tenders, and option cancellations.
• Multi-State Equity Compensation: Which State Taxes RSUs, Options, and Stock Sales? — allocate compensation across jurisdictions.