An ISBN commercially identifies an edition of a book and helps manage its distribution. If you are publishing a work in Spain, you may need one to work with bookshops or platforms, although the Spanish ISBN Agency confirms that it is not a general legal requirement for publishing a book.
An ISBN does not protect copyright and does not replace legal deposit. They serve different purposes.
Where to apply for an ISBN in Spain
ISBNs are managed by the Spanish ISBN Agency, which is linked to the Federation of Spanish Publishers’ Guilds. Applications are submitted through its platform; always check the current conditions there.
Who applies for the identifier?
The publishing entity or a self-publisher can apply by following the agency’s procedures. The form and fees depend on the type of applicant and service.
What information do you need?
The application asks for bibliographic and edition details, such as the title, authorship, format and other characteristics. Finalise this information beforehand to avoid later corrections.
ISBNs for printed books and ebooks
Editions sold separately in different media or formats may require different identifiers. Check the assignment rules before reusing the same number.
How much does an ISBN cost?
Fees can change and the agency publishes its current prices. A cost figure without a date and conditions should not be treated as permanent.
What to do after receiving it
The number can be placed on the book’s copyright page and, where appropriate, used to generate a barcode for the back cover.
Application steps
- Decide whether the book will be commercially distributed.
- Identify the publisher.
- Prepare the bibliographic information.
- Check the official options and fees.
- Submit the application.
- Verify the number assigned.
- Add it to the final edition files.
ISBN versus legal deposit
| Procedure | Purpose | Is it always compulsory? |
|---|---|---|
| ISBN | Identify an edition | No |
| Legal deposit | Preserve published heritage | Depends on the publication |
The ISBN and legal deposit serve different purposes. Check which identifiers and formalities apply to the particular edition before finalising the artwork.
Sources and frequently asked questions
Consult the Spanish ISBN Agency’s frequently asked questions and its current application conditions.
Does the printer assign the ISBN?
No. The party responsible for the edition must provide it; the printer should not invent one.
Does it register copyright?
No.
Is it required for legal deposit?
No.
Do you need to print a book or catalogue? Send us the page count, dimensions, materials and binding requirements.
This post is also available in:
Français (French) 
Português (Portuguese (Portugal)) 
Español (Spanish)