What Is Background IP?
Background IP (or pre-existing IP) is the intellectual property you owned before a project started — your code libraries, design templates, frameworks, and know-how — as opposed to the new work created for the client. A well-drafted contract separates the two: the client gets the deliverables; you keep the toolkit that made them.
Why it matters
Reusable assets are how independent professionals stay profitable: the same framework serves many clients. A broad IP assignment with no background-IP carve-out can transfer that toolkit to one client — meaning using your own template on the next project could technically infringe. The clause rarely gets attention because nothing feels lost on signing day; the cost appears one project later.
What to watch for
- Assignment of "all intellectual property" with no mention of pre-existing materials.
- No license back to the client — the mirror problem: if your background IP is embedded in the deliverable, the client needs a license to use it, or the deliverable is encumbered.
- "Developed in connection with the project" language that could reach improvements you make to your own tools along the way.
- Work-for-hire labels applied to everything, toolkit included (see work for hire).
A realistic example
A developer builds client sites on a starter framework she has refined for years. One contract assigns "all IP created or used in the project." Read literally, the framework — used in the project — went with it. When her next client's counsel runs a diligence check, the earlier contract surfaces as a question mark over her own core asset.
What to ask for
- A carve-out sentence: "Pre-existing materials and general know-how remain the Contractor's property."
- A license to the client covering background IP embedded in the deliverables, so both sides are clean.
- Improvements stay with the base: refinements to your own tools remain yours, even when made during the project.
Related terms: IP assignment · work for hire Related guide: How to read a freelance contract
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Not legal advice. This is an educational definition of a common contract term. Details vary by jurisdiction — this page explains common U.S. usage. For high-stakes agreements, have a lawyer review the final version.