An ISBN costs $125 for a single number in the United States, purchased through Bowker, the only official ISBN agency for US publishers. Buying in bulk drops the price significantly — a pack of 10 brings the per-ISBN cost down to $29.50 each.
If you are publishing outside the US, the price varies dramatically. Canadian authors get ISBNs for free. Australian authors pay about AUD $44. And several self-publishing platforms offer free ISBNs with important trade-offs.
This reference covers every pricing option so you can pick the right path for your book.
US ISBN Pricing (Bowker)
Bowker is the exclusive ISBN agency for the United States. There is no other official source. Here is their current pricing:
| Quantity | Total Price | Per ISBN |
|---|---|---|
| 1 | $125 | $125.00 |
| 10 | $295 | $29.50 |
| 100 | $575 | $5.75 |
| 1,000 | $1,500 | $1.50 |
A few things to know about Bowker pricing:
- ISBNs never expire. Once purchased, they are yours forever.
- The fee is one-time — no renewals or recurring charges.
- Each format needs its own ISBN. A paperback, hardcover, and ebook edition of the same book require three separate ISBNs.
- Bowker also sells barcodes for $25, but you do not need to buy one from them. Free barcode generators produce identical results once you have your ISBN.
For most self-published authors releasing one or two books, a single ISBN at $125 is the simplest option. If you plan to publish three or more titles, the 10-pack at $295 is the better value.
ISBN Cost by Country
ISBN pricing is set by each country’s national agency. The differences are significant:
| Country | Agency | Single ISBN | Block of 10 |
|---|---|---|---|
| United States | Bowker | $125 USD | $295 USD |
| Canada | Library and Archives Canada | Free | Free |
| United Kingdom | Nielsen Book | ~£89 | ~£164 |
| Australia | Thorpe-Bowker | ~AUD $44 | ~AUD $88 |
| South Africa | National Library of SA | Free | Free |
| India | Raja Rammohun Roy National Agency | Free | Free |
Canadian authors have the best deal — Library and Archives Canada provides unlimited free ISBNs to Canadian residents. You still need to source barcodes separately.
UK authors face a minimum purchase of 10 ISBNs through Nielsen Book, making the effective minimum cost around £164.
Australian authors pay substantially less than US authors, with single ISBNs at AUD $44 through Thorpe-Bowker.
Free ISBN Options (and Their Trade-Offs)
Several self-publishing platforms provide free ISBNs. The catch: when you use a platform-issued ISBN, that platform is listed as the publisher of record — not you.
Here is what that means in practice:
| Platform | Free ISBN? | Publisher of Record | Can Use Elsewhere? |
|---|---|---|---|
| Amazon KDP | Yes | Amazon | No — KDP only |
| Draft2Digital | Yes | Draft2Digital | Limited |
| IngramSpark | Yes (with setup) | IngramSpark | No |
| Barnes & Noble Press | Yes | B&N Press | No |
| Lulu | Yes | Lulu | No |
When a free ISBN is fine:
- You are publishing exclusively on one platform
- You do not plan to distribute to bookstores or libraries
- You are testing the market before investing
When you should buy your own ISBN:
- You want to be listed as the publisher (important for building an author brand)
- You plan to distribute across multiple platforms
- You want your book in physical bookstores and library catalogs
- You are building a publishing business or imprint
Buying your own ISBN from Bowker (or your country’s official agency) gives you full control over your publishing identity. The platform-issued ISBNs lock you into that ecosystem.
Do You Actually Need an ISBN?
Not always. Here is a quick breakdown:
| Format | ISBN Required? | Notes |
|---|---|---|
| Amazon Kindle ebook | No | Amazon uses its own ASIN system |
| Amazon KDP paperback | Optional | KDP provides a free one, or use your own |
| IngramSpark print | Yes | Required for distribution |
| Bookstore distribution | Yes | Bookstores and wholesalers require ISBNs |
| Library distribution | Yes | Libraries catalog by ISBN |
| Direct sales (your website) | No | You control the storefront |
If you are publishing only on Amazon as a Kindle ebook, you can skip the ISBN entirely. Amazon assigns its own identifier (ASIN) automatically. But if you want your book available in bookstores, libraries, or through multiple distributors, you need one.
ISBN Cost vs. Other Self-Publishing Expenses
To put the ISBN cost in perspective, here is how it compares to other self-publishing expenses:
| Expense | Typical Cost Range |
|---|---|
| ISBN (single, US) | $125 |
| ISBN (10-pack, US) | $295 |
| Professional editing | $500–$3,000 |
| Cover design | $200–$1,500 |
| Book formatting | $50–$500 |
| Copyright registration | $65 |
The ISBN is one of the smaller line items in a self-publishing budget. For authors who plan multiple books, the 10-pack pays for itself quickly.
How to Buy an ISBN (Step by Step)
For US-based authors:
- Go to myidentifiers.com (Bowker’s official storefront)
- Create an account or sign in
- Select your quantity (1, 10, 100, or 1,000)
- Complete the purchase
- Assign each ISBN to a specific title and format through your Bowker dashboard
You do not need to assign the ISBN to a book immediately. You can purchase ISBNs now and assign them to future titles as you publish.
For authors in other countries, visit the International ISBN Agency to find your national agency.
Common ISBN Mistakes to Avoid
- Reusing an ISBN across formats. Your paperback and ebook need separate ISBNs.
- Buying from unofficial resellers. Third-party sellers may list themselves as the publisher. Always buy from your country’s official agency.
- Assigning an ISBN to a draft. Only assign once your title, author name, and format are final. Changes after assignment create catalog confusion.
- Skipping the ISBN for wide distribution. If you plan to sell beyond a single platform, invest in your own ISBN from the start.
FAQ
Can I get a free ISBN in the United States?
Not from Bowker directly. The only free ISBNs available to US authors come from publishing platforms like Amazon KDP, but those ISBNs list the platform as publisher and cannot be used elsewhere.
How many ISBNs do I need for one book?
One per format. A book released as a paperback, hardcover, and ebook needs three ISBNs. A second edition with substantial changes also needs a new ISBN.
Can I transfer an ISBN to a different publisher?
No. ISBNs are permanently tied to the publisher who purchased them. If you switch publishers or start a new imprint, you need new ISBNs.
Is an ISBN the same as a barcode?
No. An ISBN is a 13-digit identification number. A barcode is a scannable image that encodes the ISBN. You need the ISBN first, then you can generate a barcode using free online tools.
Do I need an ISBN to sell on Amazon?
No. Amazon Kindle ebooks use ASINs (Amazon Standard Identification Numbers) assigned automatically. For KDP paperbacks, you can use a free KDP-issued ISBN or your own.
