Understand your stock options

before you’re forced to decide

Most startup employees don’t fully understand their equity until it’s time to exercise. That’s when there’s less room to plan and more pressure to act. Our free startup equity calculator helps you understand what you have, what it costs to exercise, and how to plan ahead.

Know your options, completely free:

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Your equity is your biggest financial upside
and the least understood

Startup equity is complex by design. Strike prices, vesting schedules, expiration windows, and taxes all add friction.

Many employees:
Don’t know their real exercise cost
Underestimate tax implications
Miss opportunities to plan exercises over time

Understanding your equity early gives you options, not pressure.
Understand your equity

*Equitybee is not a tax advisor. Please consult your tax professional, as every situation is different.

What you’ll learn with Equitybee’s Startup Equity Calculator

Exercise cost

know the cost to exercise your vested options.

Tax estimation*

Understand potential tax exposure, including AMT.

Current equity value

Understand your current,
on-paper equity value.

Liquidity scenarios

See what different outcomes could look like.

Exercise planning

Explore timing strategies to reduce risk and taxes.

*Equitybee is not a tax advisor. Please consult your tax professional, as every situation is different.

How it works

No commitment. Just clarity.

Built for startup employees

We’ve worked with thousands of startup employees navigating equity decisions. This startup equity calculator was built to answer the questions employees ask long before they are ready to act.

Why we ask you to sign up?
Equity decisions evolve over time. By creating an account, you can:

Save your results and revisit scenarios as things change
Connect your Carta account for more accurate data, optional
Apply for funding and exercise with no out-of-pocket costs
Try our Equity Calculator

Frequently asked questions

What kind of equity does this calculator support?

The calculator supports common U.S. employee stock options, including ISO and NSO.

What’s the difference between ISO and NSO options?

ISOs, Incentive Stock Options, and NSOs, Non-Qualified Stock Options, are taxed differently under U.S. tax rules.
ISOs may qualify for favorable tax treatment if specific holding requirements are met, but they can trigger Alternative Minimum Tax, AMT, when exercised.
NSOs are generally taxed as ordinary income at the time of exercise.
Understanding which type you have matters because it affects how taxes may apply.

Does the calculator handle taxes?

The calculator provides estimated federal and state tax implications based on the information you provide. It helps you:

- Understand potential tax exposure
- Explore planning scenarios
- Avoid surprises later

Equitybee is not a tax advisor and this tool cannot be relied upon for tax treatment. You should always consult with a professional.

Does this work if my company is private?

Yes. The calculator is built specifically for private, pre-IPO companies, where equity decisions are often the most uncertain.

What information does the calculator use?

The calculator uses information you provide, such as:

- Your strike price
- Your most recent 409A valuation, if available
- Your option grants

This helps estimate costs and potential tax exposure.

Is this an estimate or an exact number?

All results are estimates. They are meant to help you understand tradeoffs and plan ahead. Actual outcomes may vary based on future valuations, company events, and your personal situation.
The goal is clarity, not prediction.

What if I don’t know my 409A valuation?

That’s common. You can connect your Carta account or request it from your employer

Can I use this to plan when to exercise my options?

Yes. The calculator lets you explore different exercise timing scenarios so you can see how costs and taxes may change over time. This is especially useful if you are not planning to exercise immediately. However, please keep in mind that actual outcomes may vary.

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Your equity shouldn’t be a mystery

You worked for it. You earned it. Understanding your equity now helps you make better decisions later, on your terms.

Know your options, completely free:

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.