< Back to Newsletter Directory
OPTIONS TO OWNERSHIP

ISOs vs. NSOs: The Difference Every Startup Employee Should Understand

October 12, 2025

This is the second edition of Options to Ownership, Equitybee’s monthly LinkedIn newsletter for startup employees. Our mission remains the same: to make stock options clear, practical, and actionable so you can confidently own what you’ve earned.

Equity 101: ISO vs. NSO - What’s the Difference?

If you’ve been granted stock options, chances are they fall into one of two categories: ISOs (Incentive Stock Options) or NSOs (Non-Qualified Stock Options). They sound similar but come with very different tax rules and outcomes. Here's what you need to know:

ISO vs NSO Table
Incentive Stock Options (ISOs) Non-Qualified Stock Options (NSOs)
Eligibility Employees Only Employees, contractors, advisors & board members
Tax Benefits Potentially favorable treatment No Special Benefits
Tax at Exercise No ordinary income tax – May trigger AMT Ordinary income tax on the spread (FMV – Strike Price)
Tax on Sale If held 1 Year Post-Exercise +2 Years from Grant, Taxes as long-term capital gains Gains usually taxed as capital gains, often higher
Why this matters

The difference between ISOs and NSOs can mean thousands of dollars in taxes. Knowing which type you hold helps you plan the best time (and way) to exercise.

Takeaway

Whether you have ISOs or NSOs, your options can be a life-changing part of your compensation. But without a plan, you risk losing them. Understanding the difference is step one. Finding a way to exercise is step two.
Read the full guide on ISOs vs NSOs to see real-life examples that illustrate how taxes play out in practice.

As of March 2026, Equitybee has funded over 2,800 employees from 890+ companies, with $317M+ in transaction volume.
Case Study Spotlight

ServiceTitan In one of our recent case studies, we shared how ServiceTitan employees used Equitybee to exercise their stock options and keep their ownership stake without draining their savings.
Read the full ServiceTitan case study >

Coming Next Month:

Why your stock options matter when leaving your startup + Equitybee’s checklist for protecting your equity.
Important Note: Equitybee does not provide tax advice. You should always consult with a qualified tax advisor about your specific situation.

Don’t walk away from your equity.

Join 2,800+ employees who turned vested options into real ownership
Start your application now >