Can my employer claim ownership of personal side projects developed outside of work hours?

Whether your employer owns your side project depends on the intersection of your employment contract and state law. If your project is unrelated to your employer’s business and was created entirely on your own time without company resources, you generally retain ownership, unless your contract contains an overly broad IP assignment clause.

The Legal Framework of IP Ownership

In the absence of a written agreement, the default rule is that you own the intellectual property you create. However, almost all employment contracts for developers, engineers, and creatives include an Invention Assignment Agreement. These clauses are designed to shift ownership from the employee to the employer.

The "Scope of Employment" Test

Courts typically evaluate ownership based on three primary factors:

• Time: Was the work performed during company hours?
• Resources: Did you use company laptops, servers, proprietary code, or office space?
• Relevance: Does the project relate directly to the employer’s current or anticipated business, or result from tasks performed for the employer?

Key takeaway: If you use a company-issued laptop to write code for a side project, you have likely provided the employer with a legal argument to claim ownership of that code.

Action Item: Audit your development environment. If you are using company-provided hardware or software licenses, migrate your project to a personal machine immediately.

State-Specific Protections

Several U.S. states have enacted statutes that provide a "safe harbor" for employees. These laws generally invalidate employment contract provisions that attempt to claim ownership of inventions developed entirely on an employee's own time.

Action Item: Check if your state has an "Invention Assignment" statute. If you live in a state without these protections, your contract language is the sole governing authority.

Red Flags in Your Employment Contract

When reviewing your contract, look for specific language that signals an aggressive claim on your intellectual property. These clauses are often buried in the "Proprietary Information and Inventions" section.

• "All Inventions" Clauses: Language stating that you assign all inventions created during the term of employment, regardless of whether they relate to the company's business.
• "Anticipated Business" Clauses: Language that claims ownership of anything related to the company's "anticipated" research or development, which is often interpreted broadly by courts.
• Broad Definitions of "Company Resources": Definitions that include "knowledge gained" or "confidential information" as a basis for claiming ownership of your independent work.

Key takeaway: If your contract claims ownership of any invention created "during the term of your employment," it is likely overbroad and potentially unenforceable in states like California, but dangerous in states without protective statutes.

Action Item: Identify the "Invention Assignment" section of your contract. If it lacks a carve-out for personal projects, consult with an attorney or use an analysis tool to assess your risk level.

Steps to Protect Your Intellectual Property

To ensure your side project remains yours, follow this rigorous protocol:

1. Strict Separation: Use a separate computer, separate email account, and separate cloud storage for your side project.
2. Document Everything: Keep a log of hours worked on your project to prove it was done outside of your 9-to-5 schedule.
3. Avoid Conflicts: Ensure your project does not compete with your employer’s current products or services.
4. Disclose (If Necessary): In some cases, it is safer to disclose your project to your employer and obtain a written waiver or "no-interest" letter.

Action Item: Create a "Project Log" folder on your personal cloud drive. Document the start date, hours spent, and a brief description of the work to establish a clear timeline of independent development.

How TermScore Can Help

Navigating the nuances of IP assignment clauses is complex, and missing a single line of legal jargon can cost you the rights to your work. TermScore uses advanced AI to instantly scan your employment agreements, flagging aggressive IP assignment clauses and identifying whether your contract aligns with state-specific protections. Upload your contract to TermScore today to get a clear, actionable breakdown of your ownership rights before you commit to your next big idea.