This question is asked with a lot of anxiety and has a reassuring answer: you did it by writing. What people are usually really asking is whether to register, and that is a narrower question with a cost attached.
This is general information, not legal advice. Copyright is territorial and the details differ by country; for anything with money at stake, ask a lawyer where you live.
You already own it
In every country signed up to the Berne Convention (which is nearly all of them), copyright arises automatically when a work is fixed in a tangible form. Typing it counts. There is no form to file, no fee, and no notice required for the right to exist.
So the things people believe are necessary, and are not:
| Belief | Reality |
|---|---|
| You must register to own it | No. Ownership is automatic |
| You must publish to own it | No |
| The © symbol is required | No, though it is worth including |
| Posting yourself a copy protects you | No. "Poor man's copyright" has no legal standing |
| Ideas can be copyrighted | No. Expression can; ideas, facts and titles cannot |
That last row matters for non-fiction: your explanation of a method is protected, the method itself is not.
What registration adds
Registration is a public record, and in the United States specifically it is more than that. It is a gate:
- You generally cannot file an infringement lawsuit over a US work until it is registered.
- Statutory damages and attorney's fees are available only if you registered before the infringement, or within three months of publication.
Without registration you still own the work and can still send takedown notices. What you lose is the practical ability to sue well.
Elsewhere the calculus differs. The UK, for example, has no registration system at all, and proof of authorship is a matter of evidence rather than a register.
So should you register?
| Situation | Worth it? |
|---|---|
| A book you sell, in the US | Usually yes; the fee is small against the protection |
| A free lead magnet | Rarely |
| A blog compiled into a book | Optional; you own it either way |
| Anything likely to be pirated at scale | Yes, and early |
| You are not in the US | Check your own system; most have none |
If you register a US work, doing it within three months of publication is what preserves the statutory-damages option. That deadline is the one genuinely time-sensitive thing on this page.
The copyright page
Separate from registration, and every book should have one. It costs nothing and it does three jobs: it states who owns the work, it makes the claim visible, and it looks like a real book.
The standard shape, on the verso of the title page:
- © Year, Author Name. All rights reserved.
- The edition, and a line about reproduction.
- Your ISBN, if you have one (see do you need an ISBN?)
- Credits for the cover designer and editor.
- A disclaimer, if the book gives advice.
- Contact or website.
Front and back matter covers where it sits and what else belongs around it. It is also the page most likely to be forgotten in a self-published book, because no store requires it.
Practical protection, which is different
Registration is a legal remedy. Day to day, the things that actually reduce harm:
- Keep dated evidence of authorship. Version history, drafts, timestamped files. This is what a dispute turns on in most countries.
- Watermark nothing. It annoys buyers and does not stop copying, the same conclusion as delivering an ebook to buyers.
- Expect piracy and price it in. A pirated copy is mostly not a lost sale, and chasing them is a full-time job.
- Use the stores' takedown processes. They work, and they are free.
- Compete on the things that do not copy: updates, support, and being the author.
If you use other people's work
The direction people forget. Quoting, images and lyrics are where self-published books get into real trouble:
- Quoting short passages for criticism or review is generally allowed, within limits that vary by country.
- Song lyrics are aggressively policed and expensive. Assume you need permission for any amount.
- Images need a licence, including most of what a search engine returns. Your cover artwork especially: a licence that permits commercial use on a book cover is narrower than a general stock licence.
- Your own previously published work may be committed elsewhere. Check what you signed.
Frequently asked questions
Do I need to copyright my book before publishing? No. Copyright exists from the moment you write it. Registration is optional and, in the US, worth doing within three months of publication if you want the strongest remedies.
How much does it cost to register a copyright? A modest fee for a single-author work filed online in the US. Check the current figure with the Copyright Office rather than a blog post, including this one.
Does an ISBN copyright my book? No. An ISBN is a product identifier for retail and has nothing to do with rights.
Can someone steal my book if I self-publish? They can copy it, as they can copy any published book. Ownership is not what stops that; takedowns and the fact that copies do not come with your updates or your name are.
Do I need to register in every country? No. Berne Convention membership means a work protected in one member country is protected in the others, without further formality.