Can my employer claim ownership of side projects built on my own equipment?

Yes, if your employment contract contains a broad 'Invention Assignment' clause. Even if you use personal equipment, courts often uphold these agreements if the project relates to the employer's business or uses their confidential information.

What states offer the most protection for employee side projects?

California, Washington, Illinois, and several other states have statutes that invalidate invention assignment agreements for projects developed entirely on your own time without using employer resources or trade secrets.

How can I protect my side project from my employer?

Ensure you work entirely outside of business hours, use zero company resources, avoid using company trade secrets, and verify that your project does not directly compete with your employer's current or anticipated business.

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Can my employer use an NDA to claim ownership of side projects built on my own equipment?

Yes, your employer can claim ownership of side projects if your employment agreement includes a broad Intellectual Property (IP) assignment clause. Even when using personal equipment, courts frequently enforce these contracts if the work relates to the employer's business, research, or development, or if it utilizes the employer’s confidential information.

Understanding Invention Assignment Agreements

Most employment contracts include an "Invention Assignment" or "Proprietary Information and Inventions Agreement" (PIIA). These clauses are designed to ensure that anything you create during your tenure belongs to the company. The legal battleground usually centers on the scope of these clauses.

The Scope of Ownership

Employers typically define "Inventions" to include any ideas, processes, software, or designs conceived or reduced to practice during your employment. If your contract is drafted broadly, it may capture:

Projects developed on weekends or evenings.
Work created on personal hardware (laptops, servers).
Ideas that are tangentially related to the company's industry.

Key takeaway: The physical ownership of the laptop is rarely the deciding factor in court; the legal language of your contract and the relationship of the project to your employer's business are what determine ownership.

Action Item: Locate your employment contract and search for the "Inventions" or "Intellectual Property" section. Highlight any language that claims ownership of work created "during the term of employment" without specifying that it must be related to company business.

State-Specific Protections

Several U.S. states have enacted "Employee Invention Statutes" that limit the reach of these broad assignment clauses. These laws generally prevent employers from claiming ownership of inventions developed on your own time, without using company resources, and that do not relate to the employer's business.

State	Key Protection Statute	Primary Requirement
California	Labor Code 2870	No company resources/trade secrets; no relation to company business.
Washington	RCW 49.44.140	Must be developed entirely on own time; no company equipment.
Illinois	765 ILCS 1060/2	Must not relate to employer's actual or anticipated business.
New Jersey	N.J.S.A. 34:1B-265	Protects inventions not related to employer's business or research.

Action Item: Check if your state has an invention assignment statute. If you live in a state like California, your contract may contain "unenforceable" language that provides you with more protection than the text suggests.

The "Company Resources" Trap

Even in states with strong protections, you can inadvertently forfeit your rights by using company assets. Courts interpret "resources" broadly. Using the following can trigger an employer's claim:

Company-issued software licenses (e.g., Adobe Creative Cloud, JetBrains, Microsoft Office).
Company-provided cloud storage (e.g., Google Drive, AWS, Azure).
Proprietary data, customer lists, or internal research.
Company email addresses for registration or communication.

How to Maintain a Clean Separation

Hardware Isolation: Never log into company accounts on the machine used for your side project.
Network Security: Do not use company VPNs or office Wi-Fi to push code or upload files for your project.
Documentation: Keep a clear, timestamped log of when you worked on your project to prove it occurred outside of your 9-to-5 hours.
IP Disclosure: If you are unsure, disclose the project to your employer in writing before you begin, and seek a written waiver of interest.

Key takeaway: If you use even a single line of code or a proprietary dataset belonging to your employer, you risk losing the entire project to them. Total technical isolation is your best legal defense.

Action Item: Audit your development environment. If you are using company-licensed software for your side project, migrate to open-source alternatives immediately to remove any potential claim of "resource usage."

When to Seek Legal Counsel

If your side project has significant commercial potential or if you are planning to launch a startup, do not rely on self-interpretation of your contract. You should consult with an attorney specializing in IP law if:

Your project is in the same industry as your employer.
You have signed a non-compete agreement in addition to an IP assignment clause.
You have already used company resources and need to "clean" the project.
You are preparing to resign to pursue the project full-time.

Action Item: If you are planning to monetize your side project, perform a "clean room" audit. Ensure that no company-owned IP exists in your codebase or project files before moving forward with commercialization.

How TermScore Can Help

Navigating complex employment contracts is difficult, but you don't have to do it alone. TermScore uses advanced AI to instantly analyze your employment agreements, flagging aggressive IP assignment clauses, restrictive covenants, and potential ownership traps. By uploading your contract to TermScore, you can identify exactly where your employer’s claims might overreach and gain the clarity needed to protect your intellectual property before you build.