How do I calculate what my startup equity is worth?

Start from fully diluted ownership, apply expected future dilution, choose several exit scenarios including failure, run each through the liquidation preference waterfall, take your share of what reaches common, subtract any option strike price, and subtract taxes. Percentage times headline valuation is not the right shortcut.

Why is my common stock worth less than the valuation?

The headline valuation is the price investors paid for preferred stock, which carries liquidation preferences, conversion rights, and protections that common stock lacks. That is why the independent 409A valuation of common stock, used to set option strike prices, is usually lower than the preferred price.

What is a liquidation preference?

A right for preferred investors to receive their investment, or a multiple of it, before common stockholders receive anything in a sale or wind-down. Non-participating preferred takes the greater of the preference or its converted share; participating preferred takes the preference and also shares in the rest.

What happens to my stock options if I leave the startup?

Unvested options are usually forfeited. Vested options must typically be exercised within a set window, commonly 90 days after departure, or they expire, although some companies offer longer windows. Exercising requires paying the strike price and may create tax obligations depending on the option type.

What Is My Startup Equity Worth?

Startup equity is worth what it pays out in an actual exit, not your percentage multiplied by the latest valuation. To estimate it, account for future dilution, the liquidation preferences investors hold ahead of common stock, your exercise cost and taxes if you hold options, and a realistic range of exit outcomes including zero.

Why the headline valuation overstates your shares

A startup valuation announced in a funding round is the price investors paid for preferred stock. Founders, employees, and advisors typically hold common stock or options on common.

Preferred stock carries rights that make it worth more per share:

Liquidation preference. Investors get their money back, or a multiple of it, before common holders receive anything in a sale or wind-down.
Conversion rights. Investors can choose between taking their preference or converting to common, whichever pays more.
Protective provisions and anti-dilution protections that common stock does not have.

That is why the 409A valuation, an independent appraisal of common stock fair market value used to set option strike prices, is usually well below the preferred price. The 409A is not a prediction of exit value either, but it reflects the fact that common and preferred are different securities.

Multiplying your percentage by the headline valuation assumes every share is worth the same as the most recent preferred share, in an exit at at least that valuation. Neither assumption usually holds.

The calculation that replaces it

1. Start with fully diluted ownership. Your shares or options divided by all outstanding shares, options, and convertible instruments on an as-converted basis.

2. Apply future dilution. Each future round issues new shares. Assume further dilution for each round the company will likely need before an exit, including option pool increases.

3. Choose exit scenarios. A range such as a failure, a modest acquisition, a solid acquisition, and a large outcome. Startups fail often enough that the zero scenario deserves real weight.

4. Run the liquidation waterfall for each scenario. Subtract debt and transaction costs. Pay each series of preferred its preference, or the conversion value if higher. Distribute what remains to common and converting preferred by ownership.

5. Convert to your payout. Your share of the common proceeds. For options, subtract the aggregate strike price.

6. Subtract taxes. Depending on the instrument, holding period, and jurisdiction.

An illustration. Suppose investors have put in 40 million with a one times non-participating preference, and the company sells for 50 million. Investors converting to common would receive their ownership share of 50 million; if that is less than 40 million, they take the preference instead, and common holders share the remaining 10 million. A common holder with a 1 percent fully diluted stake might expect 500,000 from a simple percentage calculation, but receives a share of 10 million instead.

Participation and multiples

Participating preferred takes its preference and then also shares in the remainder. Preferences above one times return a multiple of the investment first. Both reduce what reaches common, especially in mid-sized exits, so check which apply before modelling.

Options, taxes, and what to ask

Options are not shares. They are the right to buy shares at a strike price. Their value is the spread between the share price at exit and the strike, and exercising before an exit requires cash.

Exercise windows. Many companies require exercise within a short period after you leave, commonly 90 days, or the options expire. Some offer extended windows. Leaving can force a costly decision.

Taxes. For incentive stock options in the US, exercising can create alternative minimum tax exposure on the spread. Non-qualified options create ordinary income on the spread at exercise. Holding periods affect whether gains are taxed as long-term capital gains. For restricted stock, an 83(b) election within 30 days of grant changes when tax applies.

What to ask the company:

Total fully diluted shares outstanding.
Preferred stock raised to date and liquidation preference terms, including participation and multiples.
Current 409A value and your strike price.
Post-termination exercise window.
Expected option pool increases and future funding plans.

Companies are not always willing to share all of this, but the refusal is itself information when evaluating an offer.

This page is general information, not legal, tax, or investment advice. Terms and rules vary by jurisdiction and deal; get advice from counsel on a specific decision.

This is general information, not legal advice, and reading it does not create an attorney-client relationship. Talk to a qualified attorney about your specific situation.

Frequently asked questions

How do I calculate what my startup equity is worth?: Start from fully diluted ownership, apply expected future dilution, choose several exit scenarios including failure, run each through the liquidation preference waterfall, take your share of what reaches common, subtract any option strike price, and subtract taxes. Percentage times headline valuation is not the right shortcut.
Why is my common stock worth less than the valuation?: The headline valuation is the price investors paid for preferred stock, which carries liquidation preferences, conversion rights, and protections that common stock lacks. That is why the independent 409A valuation of common stock, used to set option strike prices, is usually lower than the preferred price.
What is a liquidation preference?: A right for preferred investors to receive their investment, or a multiple of it, before common stockholders receive anything in a sale or wind-down. Non-participating preferred takes the greater of the preference or its converted share; participating preferred takes the preference and also shares in the rest.
What happens to my stock options if I leave the startup?: Unvested options are usually forfeited. Vested options must typically be exercised within a set window, commonly 90 days after departure, or they expire, although some companies offer longer windows. Exercising requires paying the strike price and may create tax obligations depending on the option type.