Can an employer claim ownership of my weekend side projects?

Generally, no, provided the project is developed entirely on your own time, without company equipment, and is unrelated to your employer's business. However, broad 'Invention Assignment' clauses in your contract can legally override these protections if not carefully drafted.

What makes an invention assignment clause enforceable?

Enforceability depends on state law (like California Labor Code 2870) and whether the invention relates to the employer's current business, anticipated research, or results from work performed for the employer.

How can I protect my side projects?

Use personal hardware, avoid company time, ensure the project is outside the scope of your employer's business, and request a written carve-out or 'Prior Inventions' disclosure.

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Can an employer enforce an NDA to claim ownership of my weekend side projects?

Whether an employer can claim your side projects depends on the specific language in your employment agreement and state-level labor protections. If your project is developed on your own time, using your own equipment, and is unrelated to your employer’s business, most jurisdictions protect your ownership rights.

The Legal Framework of Invention Assignment

Most employment contracts contain an Invention Assignment Agreement. This clause dictates that any intellectual property (IP) created during your employment belongs to the company. While these clauses are standard, they are not absolute. Courts generally look at three primary factors to determine if an employer can claim your work:

Time: Was the work performed during business hours or using company-paid time?
Resources: Did you use company laptops, servers, proprietary software, or office space?
Relevance: Does the project relate directly to the employer’s current business or anticipated research and development?

Key takeaway: Never use your work-issued laptop or company cloud storage for personal projects. Even if the project is unrelated, using company assets creates a legal "nexus" that employers use to claim ownership.

Action Item: Audit your current workspace. If you have any personal code or files on a company-issued device, migrate them to a personal, encrypted drive immediately.

Jurisdiction Matters: California vs. The Rest

Your location significantly impacts your rights. California, for example, provides strong statutory protections for employees.

California Labor Code Section 2870

Under California law, an employer cannot require you to assign rights to an invention developed entirely on your own time without using the employer’s equipment, supplies, facilities, or trade secret information, provided the invention:

Does not relate to the employer’s business or actual/demonstrably anticipated research.
Does not result from any work performed by the employee for the employer.

Other states, such as Washington, Illinois, and Delaware, have similar statutes, but the language varies. If you reside in a state without specific "Invention Assignment" protections, you are governed strictly by the four corners of your contract.

Factor	Protective Scenario	High-Risk Scenario
Equipment	Personal laptop/home network	Company laptop/VPN
Time	Evenings/Weekends	During "on-call" or work hours
Relevance	Unrelated industry	Directly competitive product
Resources	Personal tools	Company proprietary data

Action Item: Search your employment contract for the phrase "Invention Assignment" or "Proprietary Information." If you find it, check if it references your state’s specific labor code.

How to Protect Your Side Projects

If you are building a startup or a side project, you must be proactive. Do not assume your employer is "cool with it" just because they haven't said anything yet.

Disclose Prior Inventions: Most contracts have an "Exhibit A" or "Prior Inventions" list. List your side projects there before you sign the contract.
Get a Written Carve-Out: If you are starting a business, ask your employer for a written waiver or a "carve-out" agreement that explicitly states they have no claim to your specific project.
Maintain Strict Separation: Keep a "clean room" environment. Use a separate computer, separate email, and separate GitHub/GitLab accounts for your side work.
Avoid Conflicts of Interest: Do not build a product that competes with your employer. Even if you own the IP, you could be fired for violating a non-compete or duty of loyalty clause.

Key takeaway: A verbal "go-ahead" from your manager is legally worthless. If it isn't in writing, it doesn't exist in the eyes of the company's legal department.

Action Item: Draft a simple, professional email to your manager or HR department disclosing your side project if it is even remotely related to your field, and ask for a written acknowledgment.

The Role of TermScore in Contract Analysis

Navigating the dense legal jargon of employment contracts is difficult, and missing a single clause can cost you the rights to your future business. TermScore uses advanced AI to instantly scan your employment agreements, highlighting aggressive IP assignment clauses and identifying potential risks to your side projects. By providing a clear, plain-English breakdown of your obligations, TermScore ensures you know exactly what you are signing before you commit. Upload your contract to TermScore today to gain full visibility into your intellectual property rights.