Last reviewed by Robert Prime — March 2026
In the UK self-publishing scene, two names dominate the conversation: BookBaby and Amazon's Kindle Direct Publishing (KDP). Both platforms offer authors the opportunity to publish their books without the gatekeepers of traditional publishing, but the experiences reach differ significantly. From print-on-demand services to global distribution, understanding the nuances between these two platforms is essential for British authors looking to maximise their reach and profit.
Having spent over 25 years in e-commerce and navigating the murky waters of self-publishing myself, I can tell you from experience that the choice between BookBaby and KDP is not as straightforward as it seems. That frustration motivated me to create publishing.co.uk, a tool designed to take the headache out of formatting and preparing files for platforms like KDP. My position as co-owner of LoveReading.co.uk, the UK's largest book review platform, and founder of the Amazon growth agency MrPrime.com, gives me a unique vantage point on UK book trade realities.
This article provides a deep, UK-focused comparison of BookBaby and KDP. We'll cover everything from pricing in £, ISBN options with Nielsen, VAT implications, distribution footprints, to real-world tips and pitfalls. If you’re serious about self-publishing in the UK, this guide is your blueprint.
Understanding the Platforms
BookBaby is a full-service self-publishing platform offering print-on-demand, distribution to multiple retailers, and optional add-ons like professional editing, cover design, and book formatting. They operate on a service-fee model with upfront costs and offer print options in various formats. Their UK site (bookbaby.co.uk) tailors services and pricing to the British market, including print facilities located in the UK or Europe, which helps with shipping times and costs.
Kindle Direct Publishing (KDP) is Amazon's self-publishing platform, with no upfront costs and a print-on-demand model primarily focused on Amazon’s marketplace. KDP offers eBook and paperback publishing with direct access to Amazon’s massive customer base. While KDP is free to use, it places more responsibility on the author for formatting and marketing. Amazon's UK site (kdp.amazon.co.uk) provides localisation in currency and tax handling.
The key differences lie in pricing models, distribution channels, and the level of service. BookBaby is more of a one-stop shop but comes at a premium, while KDP is low-cost but requires more author involvement, especially around formatting and marketing.
Important Terminology
- Print-on-Demand (POD): Printing books only when orders come in, reducing inventory costs. Both BookBaby and KDP use POD technology.
- ISBN: The International Standard Book Number uniquely identifies your book. In the UK, ISBNs are purchased through Nielsen Book Services.
- Trim Size: The physical dimensions of your printed book. Popular UK sizes include 5" x 8" (127 x 203 mm) and 6" x 9" (152 x 229 mm).
- Royalty Rate: The percentage of sales you earn after costs and fees. KDP generally offers 60% of the list price minus printing costs for paperbacks.
- Distribution: The channels through which your book is sold — Amazon, Waterstones, independent bookstores, etc.
- EPUB: The standard file format for eBooks, supported by BookBaby and KDP (though Amazon converts EPUB to MOBI internally).
Publishing with BookBaby
- Create an Account: Visit bookbaby.co.uk and register. The UK portal differs slightly in pricing and print options from the US site.
- Choose Your Package: Select from services like Basic Publishing, Deluxe, or Pro, based on your budget and needs. Packages may include editing, cover design, and formatting.
- Upload Your Manuscript: BookBaby accepts DOCX files. Ensure your manuscript complies with their formatting guidelines, particularly margins fonts. Refer to their UK-specific File Preparation Guide.
- Select Print Options: Choose trim size (e.g., 5" x 8" or 6" x 9"), paper type (cream or white), binding (paperback or hardcover), and order quantity. BookBaby prints in UK or European facilities, cutting shipping times and costs for UK customers.
- ISBN Assignment: You can purchase an ISBN through BookBaby or supply your own from Nielsen. Using your own ISBN maintains your publishing rights and brand identity.
- Proof and Approve: Order a physical proof copy, review it carefully, and approve for distribution. Expect 7-10 working days for proof printing and delivery within the UK.
- Distribution: BookBaby distributes to Amazon, Apple Books, Waterstones UK and international retailers. You receive royalties based on sales minus BookBaby’s fees and printing costs.
Example: I once worked with a UK author who chose BookBaby because they wanted their book stocked in Waterstones and local bookstores. While sales there were modest compared to Amazon, the prestige and offline exposure were valuable to her brand.
Publishing with KDP
- Set Up Your KDP Account: Use your existing Amazon account or create one at kdp.amazon.co.uk.
- Prepare Your Manuscript: KDP accepts DOCX or EPUB files for eBooks, and PDF or properly formatted DOCX for paperbacks. Formatting can be a nightmare here if you’re inexperienced. Margins, bleed, embedded fonts, and cover dimensions must be precise.
- Upload Manuscript and Cover: KDP has a cover creator tool, but professional covers perform best. Upload your manuscript file and cover files (JPEG or PDF).
- Set Trim Size and Paper Options: Choose from standard sizes (typically 5" x 8", 6" x 9") and paper types (cream or white). KDP prints in Amazon’s UK print facilities for UK customers, which means faster delivery and lower shipping costs.
- ISBN: KDP offers free ISBNs but lists Amazon as the publisher. For full control, UK authors should purchase an ISBN from Nielsen.
- Pricing and Royalties: Set your sales price in £. Paperback royalties are 60% of your list price minus printing costs; eBooks earn 35% or 70% depending on price and territory.
- Publish and Promote: Once your files are approved (usually within 24-72 hours), your book is live on Amazon.co.uk and available worldwide. You control marketing and advertising, including Amazon Ads and Kindle Unlimited enrolment.
Tip: I recommend setting your book price in £ early in the process. KDP’s royalty calculator can be found under “Pricing” in your KDP dashboard (kdp.amazon.co.uk/help/topic/G200635650).
ISBNs and Barcodes
Unlike the US where Bowker is the ISBN agency, UK authors must go through Nielsen Book Services. The cost is steep compared to other countries: a single ISBN costs £93; a block of 10 ISBNs costs £174 as of 2026. Many UK authors mistakenly think the free KDP ISBN is a saving — don’t. Free ISBNs assign Amazon as the publisher, which can limit future rights and distribution outside Amazon.
Why ISBNs matter for UK authors:
- Owning your ISBN means you are the publisher, not Amazon or BookBaby.
- It allows you to distribute your book through multiple retailers without restrictions.
- It protects your author brand and rights.
- ISBNs are linked to book metadata in databases like Nielsen BookData, which UK retailers use for ordering.
BookBaby provides ISBNs but charges a premium and often assigns themselves as the publisher unless you supply your own. For UK authors serious about control, buying your own Nielsen ISBN is best.
Real UK ISBN cost example:
- 1 ISBN = £93 (Nielsen)
- 10 ISBNs = £174 (Nielsen)
- BookBaby ISBN (if supplied) = £30-£50 extra, with them as publisher
VAT and Taxation
In the UK, print books are zero-rated for VAT, meaning no VAT is charged on print book sales. However, eBooks are not zero-rated and are subject to VAT at the standard UK rate (20%). This difference impacts pricing and royalties.
- KDP: Amazon collects VAT on eBook sales and handles tax reporting. UK authors receive royalties net of VAT.
- BookBaby: Their service fees often include VAT. Check invoices carefully. Print books are VAT-free, but services such as editing or formatting may attract VAT.
Authors registering as businesses should be aware of VAT implications when declaring income from self-publishing.
Distribution Nuances
- BookBaby: Offers broad distribution to Amazon, Apple Books, Waterstones, Gardners UK bookstores. This multi-channel retail (MCR) approach is attractive for UK authors wanting presence beyond Amazon. However, sales outside Amazon rarely match Amazon’s volume for self-published authors.
- KDP: Focuses on Amazon’s marketplace, which accounts for roughly 70% of UK online book sales and a significant portion of offline sales. KDP does not distribute to Waterstones or UK physical retailers.
UK market context:
Amazon’s 70%+ online market share means being on Amazon is essential for sales volume. However, presence in physical UK bookstores adds prestige and can help with events and local marketing. BookBaby’s distribution to UK retailers makes this possible but often at increased cost and complexity.
Common Mistakes UK Authors Make and How to Avoid Them
Mistake 1: Relying on Free ISBNs
Many UK authors use free KDP ISBNs unaware that this assigns Amazon as the publisher, not them. This limits your ability to distribute elsewhere and can affect your author brand. I’ve encountered authors frustrated when they tried to move to other retailers and found their book metadata locked under Amazon’s imprint.
How to avoid: Purchase your own ISBNs from Nielsen before uploading to either platform. They didn’t. The lack of proper margins, bleed settings, and embedded fonts caused multiple rejections. Many authors waste time and money on subpar Fiverr gigs or cheap freelancers that don’t understand KDP’s specifics.
How to avoid: Use UK-specific tools like publishing.co.uk, or hire UK-based professionals familiar with KDP and BookBaby requirements.
Mistake 3: Ignoring Print Quality Proofs
Skipping physical proof copies is a common error. Both BookBaby and KDP offer proofs, but some authors skip this step to save money, only to discover serious issues post-publication (cropped text, poor colour reproduction, wrong fonts).
How to avoid: Always order a proof. Review for print quality before approving your book for live distribution.
Mistake 4: Overpaying for Services You Don’t Need
BookBaby’s comprehensive packages can be pricey. UK authors should assess which services they genuinely need. For example, if your cover is already professionally designed, don’t pay for BookBaby’s cover design add-on.
How to avoid: Choose à la carte services based on your strengths and budget.
Mistake 5: Confusing Distribution Reach
BookBaby’s broad distribution sounds great, but sales outside Amazon for self-published authors are usually negligible. Many waste money chasing marginal retailers instead of focusing on Amazon optimisation.
How to avoid: Prioritise Amazon marketing and use other distribution channels as a secondary strategy.
- Publishing.co.uk: Our flagship automated formatting tool tailored for UK print sizes requirements. Avoid the freelancer roulette and ensure compliance with platform specs.
- Calibre: Free software for converting eBooks but requires technical know-how and often needs post-conversion fixes for Amazon.
- Kindle Create: Amazon’s free tool for eBook formatting, but it’s clunky and limited in control.
- Nielsen Book Services: Your go-to for purchasing legitimate UK ISBNs, critical for control and quality. (nielsenisbnstore.com)
- Canva / Adobe InDesign: For professional cover design, though many authors benefit from hiring a specialist to avoid generic, sales-killing covers.
- Amazon KDP Reports: Use Amazon’s sales data and advertising reports to optimise pricing and marketing post-publication.
- UK Copyright Service: Useful for registering your work and understanding UK copyright law.
| Service Element | BookBaby UK Price (Approx.) | KDP UK Price | Notes |
|---|---|---|---|
| ISBN (Single) | £93 (via Nielsen, self-purchase) or £30+ via BookBaby | Free ISBN from KDP (Amazon as publisher) or £93 self-purchased via Nielsen | Buying your own ISBN is recommended for control |
| BookBaby Publishing Package (Basic) | £150 - £450+ | Free (self-service) | BookBaby charges upfront; KDP is free but DIY |
| Print Cost (Paperback, 6x9, B&W) | £2.50 - £3.50 per copy | £2.15 - £3.00 per copy | Prices vary with page count and ink type |
| Distribution Fee (BookBaby) | 15-20% commission on sales | No distribution fee, Amazon takes cut from royalties | BookBaby fees add on top of print costs |
| Proof Copy | £15 - £20 | Print cost + shipping | Both require ordering physical proofs |
| Cover Design (Professional) | £300 - £600 (optional) | £300 - £600 (optional) | Both platforms require external professional covers for best sales |
| Formatting | £130+ (freelancers) | Free DIY or paid services like publishing.co.uk | DIY formatting is common but risky |
Frequently Asked Questions (UK Focused)
Quick verdict
Use this if:
- You're publishing your first 1-3 books and want a fast workflow
- You don't want to learn complex software
- Cross-platform compatibility matters
Skip it if:
- You're publishing 10+ books and need granular control
- Your books have complex layouts (cookbooks, picture books)
- You already have a workflow that works
Best alternative: depends on your priority — speed (paid tool), price (free Calibre), or polish (paid service).
Frequently asked questions
What's the most common mistake first-time authors make with bookbaby vs kdp?
Skipping the verification step. Most bookbaby vs kdp problems are caught by a 10-minute pre-flight check before upload — we see this in our formatting queue every week.
How much time does bookbaby vs kdp usually take?
Allow 2-8 hours for a first attempt, 30-60 minutes once you've done it twice. The first time eats time because you're learning the controls; subsequent times are mechanical.
Are the free tools good enough or should I pay?
Free tools work if you have time to learn them. Paid tools (or services) save 10-30 hours and reduce rejection rates. Worth it if you're launching multiple titles.
Where can I check my work before going live?
Run a free KDP Readiness Score — catches 35+ common issues in 60 seconds, no signup. If anything fails, the report tells you exactly what to fix.
About this guide
Written by Robert Prime for publishing.co.uk. Last reviewed May 2026. Specs and pricing change — verify current figures with the linked sources before relying on them.
