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RSUs vs Stock Options: Private Company Equity
Compare RSUs and stock options at private companies, including vesting, exercise costs, taxes, valuation, liquidity, and post-employment risks.
Restricted stock units and stock options can both provide exposure to a private company's growth, but they work differently. RSUs are promises to deliver shares or cash after specified conditions are met. Stock options give employees the right to buy shares at a fixed strike price. The differences affect ownership timing, taxes, cash requirements, and the risk of holding illiquid equity.
What Is the Difference Between RSUs and Stock Options?
A restricted stock unit is a contractual promise to deliver company shares or their cash equivalent when the award's conditions are satisfied. An option is a contractual right to buy a set number of shares at a predetermined strike price before the option expires.
Feature | RSUs | Stock Options |
What the employee receives | A promise to deliver shares or cash | A right to buy shares |
Purchase required | Generally no | Yes, at the strike price |
Ownership timing | When shares are settled or delivered | After vested options are exercised |
Downside if share value falls | May retain value while shares remain worth more than zero | Can become underwater below the strike price |
Main cash need | Taxes may be due at settlement | Exercise cost and possible taxes |
Expiration | Award terms govern settlement and forfeiture | Options expire if not exercised in time |
The share class also matters. Employee awards often relate to common stock, while outside financing rounds may price preferred shares with different rights. A guide to cap tables and preferred share classes can help explain why two securities in the same company may not have the same economic value.
Do RSUs become shares as soon as they vest?
Not always. At a public company, vested RSUs commonly settle into shares on or soon after the vesting date. Private-company RSUs may use a double-trigger structure that delays settlement until both a service condition and a liquidity event occur.
The grant agreement should distinguish vesting from settlement. An employee may satisfy the service requirement while still waiting for the event that permits share delivery.
Do stock options create ownership at vesting?
No. Vesting earns the right to exercise. The employee becomes a shareholder only after exercising the options and acquiring the shares.
How Does the Stock Option Strike Price Work?
The strike price, also called the exercise price, is the amount paid per share when exercising an option. It is generally fixed when the option is granted.
If the estimated share value rises above the strike price, the option has a positive spread. If the share value falls below the strike price, the option is underwater. An underwater option may still have time value before expiration, but exercising it would usually mean paying more than the current estimated value.
Example of an option spread
Suppose an employee has 2,000 vested options with a $3 strike price. Exercising all of them costs $6,000. If the current estimated common-share value is $8, the apparent spread is $5 per share, or $10,000.
That figure is not guaranteed profit. Taxes, fees, dilution, share-class terms, and limited liquidity can reduce or delay the economic benefit. The estimated value may also change before the shares can be sold.
How Does Vesting Affect RSUs and Options?
Vesting schedules reward continued service or the achievement of specified milestones. A grant may vest monthly, quarterly, or annually, sometimes after an initial cliff. The actual schedule is defined by the award agreement.
Vesting Issue | RSUs | Stock Options |
What vesting earns | A right to future settlement or delivery | A right to exercise |
Additional trigger possible | Yes, especially at private companies | Usually no liquidity trigger for exercise, but plan restrictions apply |
Action required from employee | Often none for settlement | Exercise decision and payment required |
Unvested awards after departure | Commonly forfeited | Commonly forfeited |
Vested awards after departure | Terms may control settlement or forfeiture | Often subject to a post-termination exercise deadline |
What is a double-trigger RSU?
A double-trigger RSU usually requires two conditions:
A service-based vesting condition
A qualifying liquidity event, such as an IPO or acquisition
The structure can delay settlement—and often the associated taxable event—until employees have a potential route to liquidity. Exact treatment depends on the plan and applicable tax rules.
What happens when an employee leaves?
Unvested awards are commonly forfeited. Vested options may remain exercisable only for a limited period after termination. Vested RSUs may remain outstanding, settle later, or be forfeited depending on the award terms.
Employees should check the post-employment provisions before their last day. Missing an exercise deadline can cause vested options to expire.
How Are RSUs and Stock Options Taxed?
Tax treatment varies by country, option type, and individual circumstances. The following U.S.-focused overview is general information, not tax advice.
Award Type | Common U.S. Tax Point | Key Consideration |
RSUs | Generally when shares or cash settle | Value is commonly treated as compensation income |
NSOs | Generally at exercise | Spread is commonly treated as compensation income |
ISOs | No regular income tax at exercise if requirements are met | Alternative minimum tax may apply; holding periods affect sale treatment |
RSUs are often described as taxable at vesting, but private-company awards may separate vesting from settlement. The taxable event may occur later if the award includes valid additional conditions.
Why does private-company valuation matter for taxes?
Private companies do not have a continuously quoted market price. Tax calculations may depend on an appraisal or another company-determined fair market value. That estimate can differ from the preferred-share price reported in a financing round.
Employees should understand the private-company valuation process, confirm the valuation date, and identify which share class the figure applies to.
Can taxes be due before the shares can be sold?
Yes. Exercising options or settling equity awards can create a tax obligation even when the resulting shares remain illiquid. This cash-flow mismatch is one of the most important risks in private-company equity compensation.
How Do RSUs and Options Compare on Risk and Upside?
RSUs typically retain some value as long as the delivered shares have value. Options need the share value to exceed the strike price before they have intrinsic value. That gives options greater leverage to price increases but also a higher chance of expiring without value.
Neither award protects the employee from company failure, dilution, transfer restrictions, or a delayed exit. Employees may also become heavily concentrated in the same company that provides their salary.
Private-company outcomes should be evaluated through current financial information rather than an IPO narrative alone. Learning how to read private-company financials can help employees test valuation assumptions against revenue, cash use, debt, and operating performance.
What Happens After Shares Are Delivered or Options Are Exercised?
Once an employee owns private-company shares, selling them may require company approval, compliance checks, and an eligible buyer. Rights of first refusal can allow the company or existing shareholders to purchase the shares before an outside buyer.
Potential liquidity routes include:
A company-sponsored tender offer
An approved secondary sale
An acquisition
An IPO followed by any required lock-up period
None is guaranteed. A review of pre-IPO transfer restrictions and common transaction failures can clarify why a proposed sale may be delayed or rejected.
How Should Employees Compare Two Equity Offers?
Comparing only the number of units or options is misleading. Employees should calculate the likely cost, ownership percentage, and downside under multiple outcomes.
Review these items:
Number and type of awards
Current vested and unvested amounts
Strike price for options
Latest common-share valuation
Fully diluted share count
Share class and liquidation preferences
Vesting and settlement conditions
Expiration and post-termination deadlines
Exercise cost and estimated taxes
Transfer restrictions and realistic exit routes
Private-market risk guidance can help frame liquidity, pricing, dilution, and counterparty risks before an employee commits cash.
Are RSUs always better than stock options?
No. RSUs generally require less cash and can retain value across a wider range of share prices. Options may offer more upside leverage when the strike price is low and the company grows substantially. The better award depends on the terms, valuation, taxes, liquidity, and the employee's risk tolerance.
FAQ
Do employees pay to receive RSUs?
Employees generally do not pay a strike price for RSUs. Taxes may still be due when the award settles.
Can stock options become worthless?
Yes. Options can expire without value if the share value does not exceed the strike price or if the employee misses the exercise deadline.
Does vesting mean immediate ownership?
For options, no—vesting only creates the right to exercise. For RSUs, share delivery may occur at vesting or later, depending on the settlement terms.
Are RSUs taxed at vesting?
They are commonly taxed when settled into shares or cash. Public-company awards often settle at vesting, while private-company awards may include an additional trigger.
Can private-company employees sell their shares?
Sometimes, but a sale may require company approval and an eligible buyer. Transfer restrictions and rights of first refusal may apply.
Conclusion
RSUs and stock options can both create meaningful exposure to a private company's growth, but they shift cost and risk differently. RSUs generally avoid an exercise payment, while options require cash and can become underwater. The award agreement, valuation, share class, tax timing, and liquidity restrictions determine the real value. Employees should evaluate those terms before treating either award as guaranteed compensation.
