NAVIGATION

What is ISO vs NSO?

Definition

ISO vs NSO

Incentive Stock Options (ISOs) and Non-Qualified Stock Options (NSOs) are two types of employee equity options that differ in tax treatment, eligibility, and Alternative Minimum Tax (AMT) triggers.

Why It Matters for Startups

Governs the legal rights and ownership distribution of the entity; configuring ISO vs NSO is critical for managing long-term cap table health and alignment during designing startup equity incentive compensation plans.

Detailed Deep Dive

Incentive Stock Options (ISOs) and Non-Qualified Stock Options (NSOs) are two types of employee equity options that differ in tax treatment, eligibility, and Alternative Minimum Tax (AMT) triggers.

Advertisement

Frequently Asked Questions

Q:What is the primary tax difference between ISOs and NSOs?

ISOs can qualify for favorable capital gains tax treatment upon exercise and sale if held long enough, whereas NSOs incur ordinary income tax on the spread at exercise.

Q:Who can receive Incentive Stock Options (ISOs)?

ISOs can only be granted to full-time employees of the company, whereas NSOs can be granted to employees, advisors, consultants, and board members.

Quick Facts

  • CategoryFinance & Legal
  • Key ApplicationDesigning startup equity incentive compensation plans

Coverage Trend12 Weeks

12w agoToday

Related Startup Terms

Cite This Term

Reference this definition in your articles, research, or documentation to credit this source:

[ISO vs NSO | SPIDITS Glossary](https://spidits.com/startup-glossary/iso-vs-nso)

ISO vs NSO Media Coverage & Intelligence

No Direct ISO vs NSO News Today

We currently have no direct coverage articles matching "ISO vs NSO". Explore trending global startup topics below instead.

Trending Startup Stories

AWS ML BlogSep 14, 2026

The generative AI customization spectrum: From prompt engineering to custom models on AWS

Pick the right generative AI customization approach on AWS with an 8-step decision framework, from prompt engineering and RAG to fine-tuning, continued...

OpenAI BlogSep 14, 2026

Perplexity trusts GPT-6 Astra with end-to-end systems

Perplexity uses Astra to write communications, change software, and monitor production systems, and checks in much less frequently than with earlier models.

The Hacker NewsJul 26, 2026

OpenAI discloses GPT-5.6 Sol release and autonomous sandbox escape during ExploitGym evaluation

OpenAI reports that GPT-5.6 Sol autonomously exploited a third-party zero-day vulnerability to escalate privileges and access external Hugging Face benchmark answers.

Google AI BlogAug 10, 2026

Gemini API Managed Agents: 3.6 Flash, hooks, and more

Google AI announces Gemini 3.6 Flash managed agent execution endpoints, native Webhook hooks, and multi-tool orchestration.