Can an employment NDA legally claim ownership of personal side projects built without company resources?

Can an NDA claim your side projects? Generally, no, if built without company resources. Learn how to protect your IP with TermScore's expert guide.

October 18, 2026TermScore Legal Intelligence GroupStatutory & Corpus Verified589 words

Can an employment NDA legally claim ownership of personal side projects built without company resources?

In most jurisdictions, an employment NDA or IP assignment agreement cannot legally claim ownership of side projects developed entirely on your own time, without company equipment, and unrelated to the employer's business. Overly broad clauses are often unenforceable under state labor laws, particularly in states with specific employee invention protections.

The Legal Reality of IP Assignment Clauses

Many employment contracts contain "Invention Assignment" clauses that are deceptively broad. While these are intended to protect the company's core intellectual property, they often overreach. An employer's claim to your work generally hinges on three factors: the use of company resources, the timing of the work, and the relevance to the employer's business.

The "Three-Prong" Test for Ownership

Courts typically look for these three conditions to determine if an invention belongs to the employer:

  • Resources: Did you use company laptops, software licenses, servers, or proprietary data?
  • Time: Was the work performed during your contracted working hours?
  • Relevance: Does the project relate directly to the employer's business or anticipated research and development?

Key takeaway: If your project fails all three prongs—meaning you used your own equipment, worked on your own time, and the project is unrelated to your employer's business—it is almost certainly yours.

Action Item: Audit your current contract for the phrase "all work created during the term of employment." If this phrase lacks qualifiers regarding company resources or business relevance, it is a red flag.

Jurisdiction-Specific Protections

Several U.S. states have enacted statutes that explicitly protect employee inventions. These laws override contract language that attempts to claim ownership of independent projects.

StateKey StatutePrimary Protection
CaliforniaLabor Code § 2870Protects inventions made entirely on own time without company resources.
WashingtonRCW 49.44.140Invalidates agreements requiring assignment of inventions developed on own time.
Illinois765 ILCS 1060/2Limits assignment of inventions developed without company equipment/trade secrets.
New JerseyN.J.S.A. 34:1B-265Protects inventions unrelated to employer's business.

Action Item: Check if your state has an "Employee Invention Act." If it does, your contract cannot legally override these statutory protections, regardless of what the document says.

Red Flags in Your Employment Agreement

When reviewing your contract, look for these specific clauses that indicate an attempt to overreach:

  • "Work Made for Hire" without limitation: A clause claiming everything you create is a "work made for hire" without specifying the scope of your employment.
  • "Related to Business" ambiguity: Phrases like "related to the company's current or anticipated business" are often used to capture any project that could theoretically compete with the company.
  • Broad IP Assignment: Language that claims ownership of "all inventions, ideas, and concepts" conceived during the term of employment.

How to Mitigate Risk

  1. Document Everything: Keep a log of hours worked on your side project and a list of hardware/software used.
  2. Use Personal Hardware: Never install company software or access company repositories on the machine used for your side project.
  3. Disclose Early: If you are concerned about a potential conflict, disclose the project to your manager or HR in writing, clearly stating it is a personal endeavor unrelated to your job duties.

Key takeaway: If you are building something that could be considered a competitor to your employer, the risk of litigation is high, regardless of whether you used company resources. Consult with an attorney before launching.

Protecting Your Future

Navigating the intersection of employment law and intellectual property is complex. Ambiguous contract language can lead to costly disputes that jeopardize your side project. TermScore provides an AI-powered analysis of your employment agreements, automatically identifying overbroad IP assignment clauses and highlighting potential risks to your personal projects before you sign. Ensure your creative work remains yours by leveraging TermScore to gain total clarity on your contractual obligations.

Instant Clause Diagnostic

Check a suspicious clause

Paste a sentence or clause from your employment & nda to get an immediate statutory risk audit.

0/3000
§

TermScore Legal Intelligence Group

Audited for 2026 Standards

Researched and cross-referenced against statutory codes, judicial rulings, and TermScore's proprietary Corpus of 100,000+ analyzed contracts. Our intelligence unit continuously audits contract enforceability and predatory clause variance across all 50 US jurisdictions.

Methodology: Empirical Corpus + Statutory CodeEditorial Standards & Methodology →

Get the contract red-flag checklist

Join landlords and freelancers getting clause breakdowns and benchmark data. No spam.

Keep reading

Don't guess. Get your TermScore.

Upload your lease, employment contract, or agreement and let our AI flag every risk in seconds.

Score my document free