Can You Copyright a Book You Wrote With AI?
The Copyright Office and the federal courts have now answered this. Here is what they actually said, quoted.
The short answer
Yes — provided a human wrote the expression. United States copyright protects work authored by a person, and using AI along the way does not forfeit that. The D.C. Circuit held in Thaler v. Perlmutter that “the human authorship requirement does not prohibit copyrighting work that was made by or with the assistance of artificial intelligence,” and the Supreme Court declined to review that ruling in March 2026. What is not protected is material the AI generated without meaningful human creative control. The Copyright Office is explicit that prompts alone are not enough to make you the author of the output. If your novel contains more than a trivial amount of AI-generated text, you must disclose it when you register.
This is legal information, not legal advice. It describes United States law as of August 6, 2026 and links every claim to a primary source. Copyright outcomes turn on the specific facts of your manuscript. If real money or a publishing contract is involved, speak to a copyright attorney.
Most of what is written about this online is either a law firm hedging every sentence into uselessness, or a blog post confidently repeating something that was true in 2023 and is not any more. Meanwhile the actual documents are public and readable, and they answer the question more clearly than the commentary does.
So I read them: the Copyright Office’s 2025 report on copyrightability, the D.C. Circuit’s opinion in Thaler, the registration guidance, and the Review Board decisions that show where the line actually falls. Below is what they say, quoted, with links — and then what it means for a novelist who used AI somewhere in the process.
The single most important sentence for authors
It comes from the D.C. Circuit, and it is worth reading twice, because it is the opposite of what most writers assume:
“The human authorship requirement does not prohibit copyrighting work that was made by or with the assistance of artificial intelligence. The rule requires only that the author of that work be a human being — the person who created, operated, or used artificial intelligence — and not the machine itself.”
— Thaler v. Perlmutter, U.S. Court of Appeals for the D.C. Circuit, March 18, 2025
The case was about whether an AI system could itself be listed as an author. It cannot — the court held the Copyright Act “requires all eligible work to be authored in the first instance by a human being.” But the court went out of its way to say that this does not touch work made with AI by a person. The Supreme Court denied certiorari on March 2, 2026, so this is settled law rather than a ruling that might be overturned.
How we got here
Copyright Registration Guidance
The Office sets the disclosure rule for works containing AI-generated material.
“If a work contains more than a de minimis amount of AI-generated material, the applicant should disclose that information.”
U.S. Copyright Office, Registration Guidance (88 Fed. Reg. 16190)
Zarya of the Dawn
A graphic novel is partly registered — the human text and layout are protected, the Midjourney images are not.
“Human-authored text as well as the human-authored visual elements, but not images generated by Midjourney that were not the product of human authorship.”
U.S. Copyright Office, Cancellation Decision re: Zarya of the Dawn
AI Report, Part 2: Copyrightability
The Office publishes its full analysis of what human contribution is enough.
“Based on the functioning of current generally available technology, prompts do not alone provide sufficient control.”
U.S. Copyright Office, Copyright and Artificial Intelligence, Part 2
Thaler v. Perlmutter (D.C. Cir.)
A federal appeals court holds that an author must be a human being — but expressly protects AI-assisted work.
“The human authorship requirement does not prohibit copyrighting work that was made by or with the assistance of artificial intelligence.”
Supreme Court denies certiorari
The Supreme Court declines to review Thaler, leaving the human-authorship holding standing.
“The D.C. Circuit ruling stands: the Copyright Act requires copyrightable works to be authored by a human being.”
Supreme Court of the United States, cert. denied March 2, 2026
The test: did a human make the expressive choices?
The Copyright Office’s Part 2 report frames the whole question around a single distinction, and once you see it the rest follows:
“There is an important distinction between using AI as a tool to assist in the creation of works and using AI as a stand-in for human creativity. While assistive uses that enhance human expression do not limit copyright protection, uses where an AI system makes expressive choices require further analysis. This distinction depends on how the system is being used, not on its inherent characteristics.”
That last clause matters more than it looks. There is no list of forbidden tools. The same AI can be used in a way that keeps your copyright intact and in a way that does not, and the difference is who made the expressive decisions.
The report identifies three ways a human can contribute, and treats them very differently:
- Prompts. Not sufficient on their own. The Office concluded that “prompts alone do not provide sufficient human control to make users of an AI system the authors of the output,” because they “function as instructions that convey unprotectible ideas.”
- Expressive inputs. Your own writing, fed in and still perceptible in the output, stays yours. This is the route most novelists are actually on.
- Modifications and arrangement. Protected. Authors are entitled to copyright in “the creative selection, coordination, or arrangement of material in the outputs, or creative modifications of the outputs.”
What this means for your manuscript
Here is the same test applied to the situations novelists actually find themselves in. The Office is clear that this is fact-specific — it says authorship “must be analyzed on a case-by-case basis” — so treat these as the shape of the analysis rather than guarantees.
| What you did | Status | Why |
|---|---|---|
| You wrote every sentence. AI only suggested plot ideas or gave feedback. | Fully protected | Ideas are not protected by copyright in the first place, so taking one changes nothing. The expression is entirely yours. The Office treats this as an assistive use. |
| AI checked grammar, flagged pacing, or produced a critique you then acted on. | Fully protected | Editorial assistance does not transfer authorship. You made every expressive choice about what to change. |
| You prompted AI to generate prose and published it essentially unchanged. | Not protected | The Office is explicit that prompts alone are not enough — they “function as instructions that convey unprotectible ideas.” Nobody authored the expression. |
| AI drafted a scene and you rewrote it heavily in your own voice. | Partly protected | Your creative modifications are protected. The underlying AI-generated expression is not. In practice the more you rewrite, the more of the result is yours. |
| AI generated 30 passages and you selected, cut, ordered and stitched them. | Partly protected | The Office protects “creative selection, coordination, or arrangement” of AI output. Your arrangement is protected; the individual passages are not. |
| You fed in your own writing and asked AI to expand it, and your voice is visible in the result. | Partly protected | This is the “expressive inputs” category. Your own expression that is perceptible in the output remains protected. |
Registering: what you have to disclose
This is where authors get into trouble, and it is entirely avoidable. The Copyright Office’s 2023 Registration Guidance requires that if your work contains more than a de minimis amount of AI-generated material, you disclose it on the application and briefly describe the human contribution.
“De minimis” is not defined by word count, which is unhelpful but honest — it is a judgement about significance. A single AI-suggested phrase is not going to trip it. Three AI-drafted chapters certainly will.
The consequence of getting this wrong is real. Zarya of the Dawn was registered, and then the Office cancelled and reissued the registration once it learned Midjourney had generated the images — narrowing protection to the human-authored text and arrangement. A registration obtained without disclosure is a registration that can be undone.
Practically, for a novelist:
- Keep a record as you write. Which chapters involved AI generation, and what you did to them afterwards. You will not remember in eighteen months.
- Disclose in the “Limitation of Claim” field, excluding the AI-generated material and claiming your own text, selection and arrangement.
- Do not over-disclose either. Using AI for brainstorming, feedback or grammar is an assistive use and does not produce AI-generated material in your manuscript at all.
Two Review Board decisions that show where the line is
The Office’s Review Board decisions are the closest thing to case law here, and one contrast is especially instructive. In SURYAST, an applicant supplied their own photograph and instructed an AI system to render it in the style of The Starry Night. Registration was refused: the Board found the output did not clearly show the applicant’s copyrightable input surviving into the result. In Rose Enigma, by contrast, the human-authored input was visibly present in the output, and that made the difference.
The lesson for writers is precise: it is not enough to have put something of your own in. Your expression has to still be perceptible in what comes out.
Outside the United States
This article describes U.S. law, and the answer genuinely differs elsewhere. The most striking outlier is the United Kingdom.
| Jurisdiction | Position on purely AI-generated work |
|---|---|
| United States | Not protected. Human authorship required; AI-assisted work is protected to the extent a human authored the expression. |
| United Kingdom | Protected, unusually. The Copyright, Designs and Patents Act 1988 s.9(3) covers “computer-generated works” with a 50-year term from creation. The government has consulted on changing this but left it in place. |
| EU member states | Generally not protected — the settled understanding is that only a natural person can be an author. |
| Czechia | A court held in 2024 that an AI tool cannot be the author of a copyrighted work. |
| China | More permissive in at least one decision, though the ruling is not precedential under Chinese judicial practice. |
What we would actually do
If you are writing a novel and want to use AI without weakening your rights, the practical rule is simple: use it on your writing, not instead of it. Brainstorming, structural feedback, line critique, research, and grammar are all assistive uses that the Copyright Office says do not affect protection at all. Generating publishable prose from prompts is the one thing that reliably creates unprotectable material.
Keep notes on where AI touched the manuscript. Disclose honestly when you register. And if you are ever unsure whether a chapter crossed the line, the honest answer is usually visible in how much of it you would still recognise as yours.
Copyright is only one of the two questions worth asking about an AI writing tool. The other is whether it is reading your book — we read the privacy policies of twelve writing apps and found that two of the biggest do not mention model training at all.
Related reading
- Does your writing app train on your book? We checked 12
- How to protect your book idea from being stolen
- Are AI writing tools stealing your work?
- How to not sound like ChatGPT
Sources and methodology
Every quotation on this page was taken from the primary document itself — the Copyright Office reports and the court’s own opinion — rather than from secondary commentary, and read on August 6, 2026. The documents are linked throughout so you can check any of them yourself. Primary sources used:
- U.S. Copyright Office, Copyright and Artificial Intelligence, Part 2: Copyrightability (January 2025)
- Thaler v. Perlmutter, No. 23-5233 (D.C. Cir. March 18, 2025), cert. denied March 2, 2026
- U.S. Copyright Office, Copyright Registration Guidance: Works Containing Material Generated by Artificial Intelligence (2023)
- U.S. Copyright Office, Cancellation Decision re: Zarya of the Dawn (February 2023)
- U.S. Copyright Office — Copyright and Artificial Intelligence hub
The law here is moving. If a decision changes something on this page, tell us at contact and we will re-check and update the date at the top.
Frequently asked questions
Can you copyright a book written with AI?
Yes, if a human authored the expression. The D.C. Circuit held in Thaler v. Perlmutter that "the human authorship requirement does not prohibit copyrighting work that was made by or with the assistance of artificial intelligence," and the Supreme Court declined to review that ruling in March 2026. What cannot be copyrighted is material generated by AI without sufficient human creative control — most importantly, prose produced from prompts alone.
Does using AI at all void my copyright?
No. The Copyright Office states that "neither the use of AI as an assistive tool nor the incorporation of AI-generated content into a larger copyrightable work affects the availability of copyright protection for the work as a whole." Using AI for brainstorming, feedback, grammar or research does not weaken your claim to the prose you wrote.
Are prompts enough to make me the author?
No, not under current technology. The Copyright Office concluded that "prompts alone do not provide sufficient human control to make users of an AI system the authors of the output," because prompts function as instructions conveying unprotectible ideas. Writing a longer or more detailed prompt does not change the analysis.
Do I have to disclose AI use when I register my novel?
Yes, if there is more than a de minimis amount of AI-generated material in it. The Copyright Office's 2023 Registration Guidance requires applicants to disclose AI-generated content and briefly explain the human contribution. Failing to disclose can jeopardise the registration — the Office cancelled and reissued the Zarya of the Dawn registration on exactly this issue.
What if I heavily rewrote what the AI produced?
Your creative modifications are protectable. The Office states that human authors are entitled to copyright in "creative modifications of the outputs" and in the "creative selection, coordination, or arrangement" of AI-generated material. The AI-generated expression underneath remains unprotected, so the practical effect is that the more of the final text is genuinely yours, the more of it you own.
Is the law different outside the United States?
Yes. The United Kingdom has protected "computer-generated works" since the Copyright, Designs and Patents Act 1988 (s.9(3)), with a 50-year term from creation, though the government has consulted on changing it. EU member states generally require a natural person as author, and a Czech court held in 2024 that an AI tool cannot be an author. This article describes United States law.
Does an AI company own my book because I used their tool?
No. Tool providers do not acquire copyright in your writing by virtue of you using the tool, and the major providers disclaim ownership of output in their terms. Whether they train their models on your text is a separate question with a separate answer — we read twelve of those policies and published what each one says.