Who owns copyright in software in the UK?
By SuLe · Updated 10 May 2026
Software is protected by copyright automatically as a literary work, and ownership follows who wrote it: an employee's code belongs to the employer, but a contractor's code belongs to the contractor until they sign a written assignment. There is no copyright registration in the UK — protection is automatic, so the real question is always who owns it, not whether it exists.
Key facts
- Source and object code are protected as literary works under the CDPA 1988.
- Copyright arises automatically on creation — there is no UK copyright register.
- An employee's code made in the course of employment belongs to the employer (s.11(2)).
- A contractor owns their code until a written, signed assignment transfers it (s.90).
- Copyright protects your specific code, not the idea — it lasts the author's life plus 70 years.
Does software have copyright in the UK?
Yes. Under the Copyright, Designs and Patents Act 1988, software is protected as a literary work, covering both source code and object (compiled) code.
The protection is automatic. Copyright arises the moment the code is written or recorded — there is no registration system in the UK, and nothing to file. It lasts a long time, too: the author's life plus 70 years.
So your codebase is protected from the first commit. The catch is that "protected" and "owned by your company" are not the same thing — which is where founders get caught out.
Who owns the copyright by default?
The author, unless they wrote it as an employee. That default rule is the root of almost every software-ownership problem startups hit.
An employee who writes code in the course of their employment does not own it — the employer does, automatically, under s.11(2). No assignment is needed, though a confirming IP clause in the contract is good practice.
A contractor, freelancer, agency or fractional CTO is different: they own the copyright in the code they write, even though you paid for it, until they sign a written assignment (an assignment must be in writing and signed under s.90). That is the core employee-versus-contractor trap, and it applies to code just as much as to designs or content.
| Who wrote the code | Owns the copyright | To make the company owner |
|---|---|---|
| Employee, in the course of their job | The employer (company) | Nothing — automatic (s.11(2)) |
| Contractor / freelancer | The contractor | Written, signed assignment |
| Agency | The agency | Assignment on payment |
| Founder, before incorporation | The founder personally | Assignment into the company |
Do I need to register software copyright?
No — there is nothing to register. The UK has no copyright register, and protection is automatic, so you cannot and need not file anything to have copyright.
What you do need is proof of ownership. That means signed assignments from every non-employee who wrote code, a confirming IP clause for employees, and reasonable records of who wrote what and when.
This is exactly what investors examine in due diligence: not a registration certificate, but a clean chain of ownership showing the company owns its codebase outright. Owning it — through proper assignments — is the whole game.
Does copyright stop competitors building similar software?
No — and this is an important limit. Copyright protects your specific expression, meaning your actual code, not the idea, functionality or concept behind it.
A competitor can lawfully write their own software that does the same thing, provided they did not copy your code. Independent creation is not infringement, however similar the end result feels to use.
That is why copyright is only part of the picture. To defend a genuinely novel functional idea you would look to patents — rare for software, since programs "as such" are excluded from patentability — and in practice most startups rely on copyright over the code, confidentiality over the secrets, and speed to market.
Worked example
Elena runs an edtech startup, LumaLearn Ltd. Her codebase has three authors: herself (pre-incorporation), a salaried engineer, and a freelance developer she paid £7,500 for a specific module.
The ownership splits three ways at first. The engineer's code belongs to LumaLearn automatically. Elena's pre-incorporation code is hers personally until she assigns it in. The freelancer's module is the freelancer's until he signs an assignment — the £7,500 invoice did not transfer it. Elena fixes all of it before raising: a founder assignment for her early work and a signed assignment from the freelancer. Now LumaLearn owns its whole codebase, and when investors ask, the answer is clean — no registration required, just the right paperwork.
Where founders go wrong
Thinking copyright must be registered.
There's no UK register — protection is automatic, but ownership still needs paperwork.Assuming paying for code means owning it.
For contractors it doesn't — you need a signed assignment.Overlooking pre-incorporation founder code.
It belongs to the founder personally until assigned to the company.Expecting copyright to block similar products.
It protects your code, not the idea — independent creation is allowed.
Related questions
Does software have copyright in the UK?
Yes. Source and object code are protected as literary works under the Copyright, Designs and Patents Act 1988. Copyright arises automatically when the code is written — there is no registration in the UK — and lasts the author's life plus 70 years.
Who owns the copyright in code by default?
The author does, unless they wrote it as an employee. An employee's code made in the course of employment belongs to the employer automatically (s.11(2)). A contractor or freelancer owns their code until they sign a written assignment, even though you paid for it. [More: Who owns the IP my employees and contractors create?]
Do I need to register software copyright?
No. The UK has no copyright register — protection is automatic on creation. What you do need is proof of ownership: signed assignments from any non-employees, and clear records of who wrote what. Ownership, not registration, is what investors check.
Does copyright stop someone building similar software?
No. Copyright protects your specific expression — your actual code — not the underlying idea or functionality. Someone can independently write software that does the same thing without infringing, as long as they didn't copy your code. That's why speed and confidentiality also matter.
Software copyright is automatic, but a clean ownership chain across founders, employees and contractors is not — and that gap is what investors probe. A SuLe solicitor can check who really owns your codebase and paper over the holes before diligence does. Book a free IP health check call and confirm the company owns its own code.
Keep reading: Who owns the IP my employees and contractors create? · What is an IP assignment agreement and when do I need one? · Who owns the code if an agency built my MVP? · Can I patent software in the UK? · Who owns AI-generated code or content? · How do I transfer pre-incorporation IP into my company?
Primary sources: Copyright, Designs and Patents Act 1988 · GOV.UK — How copyright protects your work
