IP Assignment: Definition, How It Works, and Examples (2026)
Also known as: Intellectual property assignment, Work product assignment, Assignment of inventions, IP transfer
TL;DR
IP assignment is the legal transfer of ownership of intellectual property (code, designs, content, inventions) from the creator to another party — typically from a worker or contractor to the company paying for the work.
Why IP assignment matters more than most founders realize
Absent a written assignment, the creator of a copyrightable work owns it by default — even if you paid them to make it. In the US, "work made for hire" only applies automatically to W-2 employees creating work within their job scope. For contractors and offshore workers, you need an explicit IP assignment clause or the IP belongs to them.
This is not hypothetical. Startups have discovered that their codebase was legally owned by a former contractor mid-acquisition due-diligence. The cleanup (back-negotiating an assignment, sometimes paying six figures) is painful and always surprising to the founder.
What a strong IP assignment clause includes
The essential elements:
- • Present assignment ("hereby assigns"), not a promise to assign in the future ("agrees to assign")
- • Broad scope: all IP created during engagement relating to the company's business
- • All types: patents, copyrights, trademarks, trade secrets, moral rights, know-how
- • Worldwide territory
- • Perpetual duration
- • Waiver of moral rights where legal
- • Assistance clause: the worker will sign papers needed to perfect the assignment
- • Prior inventions schedule: worker lists what they want excluded from assignment
Work-for-hire vs IP assignment
These are two different legal mechanisms that achieve similar results through different paths:
| Mechanism | What it does | When it applies |
|---|---|---|
| Work for hire (copyright only) | Company is deemed the author from creation | US W-2 employees in scope; contractors only for 9 specific categories |
| IP assignment | Creator transfers ownership to company | Everyone — the safer belt-and-suspenders approach |
| License | Creator keeps ownership but grants usage rights | Rarely what you want for core IP |
The country trap: US-style IP assignment doesn't always work abroad
Many offshore jurisdictions do not recognize US "work for hire" and have mandatory moral-rights or creator-protection rules. The implications:
- • Germany, France, Spain: strong moral rights that cannot be waived; need careful contract drafting
- • India: IP assignment must be in writing, signed, and requires specific Indian-law language
- • Philippines: employer generally owns IP from employees but contract language matters
- • China: very specific patent/utility-model rules; consult local counsel
- • Brazil: strong creator protections, especially for architectural works and audiovisual
Consideration: why most IP assignments fail in court
IP assignments need consideration (something of value given in exchange). For employees and contractors, salary/fees typically count. For post-engagement assignments or existing-employee addenda, many lawyers recommend nominal consideration ($10, a promotion, or explicit continued employment) to make the assignment ironclad.
The common failure: a company signs an employee six months after they started, tries to assign pre-existing IP, and has nothing new to exchange. Courts sometimes void these. Always get the assignment signed before the work begins, with clear consideration.
Frequently asked questions
Do I automatically own what my employees create?
In the US, yes — W-2 employees' in-scope work is "work for hire" and automatically the employer's. For out-of-scope work, contractor work, or international employees, you need an explicit written assignment.
Does "work for hire" apply to contractors?
Only for 9 specific categories under US copyright law (commissioned contributions to collective works, motion pictures, translations, etc.) and only with written agreement. For everything else — software, most designs — contractors own their work unless they explicitly assign it. Best practice: always include IP assignment language alongside any work-for-hire language.
What is a "prior inventions" schedule?
A list of IP the worker owned before starting with you that they want excluded from the assignment. Example: a developer who has a personal open-source library lists it so the company does not get ownership of it. Good contracts require the worker to list these explicitly; blank = none.
Does IP assignment cover off-hours work?
Depends on the contract and state law. California Labor Code 2870 limits assignment of inventions created entirely on the worker's own time without using company resources. Similar laws exist in other states. The assignment clause should carve these out to be enforceable in CA, WA, MN, and a few other states.
What if an offshore contractor won't sign an IP assignment?
Find another contractor. Working without an assignment is rarely worth the downstream IP risk. Reputable offshore staffing agencies require IP assignment as part of their worker onboarding — verify this is the case.
Can I retroactively assign IP after the work is done?
Yes, but with risks. Retroactive assignments need new consideration (something given in exchange). Without it, courts may refuse to enforce. Better: sign assignment at start of engagement.