Net Exercise

What Is a Net Exercise?

A net exercise (also called a stock swap or net share settlement) is a method of exercising stock options that requires no cash payment from the employee. Instead of paying the exercise price in cash, the company withholds enough shares from the exercise to cover the cost, and delivers only the remaining "net" shares to the employee. It is similar in concept to a cashless exercise, but a net exercise can be done at private companies where there is no public market to sell shares.

For example, if you exercise 1,000 options at a $5 strike price and the current FMV is $25 per share, the total exercise cost is $5,000. The company withholds 200 shares (worth $5,000 at $25 FMV) to cover the cost and delivers 800 shares to you. Some net exercises also withhold additional shares to cover the tax withholding obligation.

How Net Exercise Works

The Mechanics

1. You notify the company that you want to net exercise a specific number of options.
2. The company calculates the total exercise cost (strike price × number of options).
3. The company determines the current FMV (typically from the most recent 409A valuation for private companies).
4. The company calculates how many shares must be withheld to cover the exercise cost (and optionally, tax withholding).
5. The remaining shares are issued to you.

Net Exercise vs. Cashless Exercise

The terms are sometimes used interchangeably, but there is a distinction:

• Net exercise: Shares are withheld by the company. No market sale is involved. Works at private companies.
• Cashless exercise (sell-to-cover): Shares are sold on the open market to generate cash to cover the exercise cost and taxes. Requires a public market.

Both methods achieve the same goal — exercising without cash out of pocket — but through different mechanisms.

Tax Withholding

In a net exercise of NSOs, the company typically withholds additional shares to cover the income tax and payroll tax obligation on the spread. For ISOs, there is generally no withholding required at exercise (since ISOs are not subject to regular income tax at exercise), so the company only withholds shares for the exercise cost.

Plan Requirements

Not all stock option plans permit net exercise. Check your equity plan documents and stock option agreement to see if net exercise is available. Many companies — especially earlier-stage startups — do not offer this feature because it requires the company to have a reliable FMV and administrative capacity to handle the share accounting.

Practical Implications for Startup Employees

No Cash Needed

The primary advantage of a net exercise is that you do not need to come up with cash to exercise your options. This removes one of the biggest barriers to exercising — the upfront cost — and allows employees to participate in their equity compensation regardless of their personal liquidity.

Fewer Shares Received

The trade-off is that you receive fewer shares. In the example above, you received 800 shares instead of 1,000. If the company eventually exits at a high valuation, those 200 withheld shares represent foregone upside. The decision between paying cash (and receiving all shares) versus net exercising (and receiving fewer shares) depends on your cash availability, risk tolerance, and conviction in the company's future value.

FMV Determines the Math

The number of shares withheld depends on the current FMV. If the FMV is high relative to the strike price, fewer shares need to be withheld. If the FMV is only slightly above the strike price, a larger proportion of shares will be withheld, potentially leaving you with very few net shares.

Impact on Ownership

Because net exercise results in fewer issued shares, your total ownership percentage will be lower than if you had paid cash for the full exercise. This is relevant for cap table modeling and for understanding your fully diluted ownership.

How It Relates to Exercising Stock Options

Net exercise is one of several paths to exercise your stock options without needing upfront cash. If your company's plan allows it, it can be an attractive option — especially when you have limited liquidity or when the spread is large and the cash exercise cost would be prohibitive. Compare the net exercise outcome (fewer shares, no cash outlay) against a full cash exercise (all shares, cash required) and a financed exercise (all shares, repayment obligation) to determine which approach aligns best with your financial situation and risk tolerance.