Last reviewed by Robert Prime — July 2026
Verdict: The UK's legal requirements for self-publishers are lighter than most authors expect. You own copyright automatically. Legal Deposit costs only postage. ISBN is optional but recommended (£93 single, £174 for 10). HMRC registration is free. VAT on books is zero-rated. Total mandatory cost: under £10 in postage. Total recommended cost: £93–£174 for ISBNs.
Publishing a book in the UK comes with a short list of legal and tax obligations that are surprisingly manageable — but easy to miss if nobody tells you about them. This hub consolidates everything a UK self-publisher needs to know about ISBN, copyright, Legal Deposit, HMRC and VAT into one checklist.
None of this is legal or tax advice. It's a factual summary of UK requirements as they stand in July 2026. For anything complex — limited company structures, overseas income, rights licensing — talk to an accountant or solicitor.
At a glance
| Obligation | Required? | Cost | When | More detail |
|---|---|---|---|---|
| ISBN | Optional (but recommended) | £93 single / £174 for 10 (Nielsen) | Before publication | ISBN UK requirements |
| Copyright page | Strongly recommended | Free | Before publication | Copyright page template |
| Legal Deposit | Required by law | Free (postage only) | Within one month of publication | Legal Deposit guide |
| HMRC self-employment | Required if income > £1,000/yr | Free to register | Before 5 October after your first tax year of trading | Self-publishing tax UK |
| VAT registration | Only if turnover > £90,000/yr | Free to register | When approaching threshold | See VAT section below |
Step 1: ISBN
An ISBN (International Standard Book Number) is a 13-digit identifier for your book. It is not legally required to publish on Amazon KDP — Amazon will assign a free one — but buying your own gives you control over your publisher imprint and the ability to sell through other channels.
Where to buy: In the UK, ISBNs are issued exclusively by Nielsen Book Services. There is no other legitimate UK source.
Cost:
- Single ISBN: £93
- Pack of 10: £174 (£17.40 each)
Key rules:
- Each format needs its own ISBN — paperback, hardback and ebook are three separate ISBNs.
- A KDP-assigned free ISBN is locked to Amazon and shows the publisher as "Independently published".
- If you buy your own ISBN, the same ISBN must appear in your KDP metadata, your copyright page, and your back cover barcode. Any mismatch causes a KDP rejection.
Recommendation: If you're only selling on Amazon and don't mind the "Independently published" tag, the free KDP ISBN is fine. If you want your own imprint name or plan to sell through bookshops, libraries or other retailers, buy a pack of 10 from Nielsen — at £17.40 each, it's far better value than singles.
Full guide: ISBN Requirements UK
Step 2: Copyright page
You own the copyright to your work automatically the moment you write it. You do not need to register copyright in the UK — there is no copyright register. However, you should include a copyright page in your book.
What to include:
- Copyright notice: "Copyright (c) [Year] [Your Name]"
- "All rights reserved" statement
- Your ISBN (if using one)
- Edition information (e.g. "First published 2026")
- Your publisher imprint name (or your own name)
- Printer/country of printing (optional but common)
Cost: Free.
Why it matters: A copyright page is not legally required, but it establishes the publication date, edition and rights holder. Without one, your book looks unprofessional, and any future rights dispute is harder to resolve.
Full guide with copy-paste template: Copyright Page Template UK
Step 3: Legal Deposit
UK law (Legal Deposit Libraries Act 2003) requires that a copy of every book published in the UK is sent to the British Library within one month of publication. This applies to self-published books, including print-on-demand.
What to do:
- After your book is published, send one copy to the Legal Deposit Office at the British Library.
- Address: Legal Deposit Office, The British Library, Boston Spa, Wetherby, West Yorkshire, LS23 7BQ.
- Include a note with the title, author, ISBN (if applicable) and publication date.
Cost: Free — you only pay postage. The British Library does not charge a deposit fee.
Ebooks: The British Library also accepts ebook deposits through its electronic Legal Deposit system, but enforcement for self-published ebooks is lighter. For print books, compliance is straightforward and expected.
Five other libraries (Bodleian Library Oxford, Cambridge University Library, National Library of Scotland, Library of Wales, Trinity College Dublin) can also request a copy within a year of publication, but they must ask — you don't need to send proactively.
Full guide: Legal Deposit for Self-Published Books
Step 4: HMRC and tax
If you earn money from selling books, HMRC considers you self-employed (unless you publish through a limited company). Here is what that means in practice.
The £1,000 trading allowance: If your total self-employment income (not just book royalties — all self-employment income combined) is under £1,000 in a tax year, you don't need to register or file a Self Assessment return. Above £1,000, you must register.
How to register:
- Register as self-employed with HMRC at gov.uk/register-for-self-assessment.
- You must register before 5 October in your second tax year of trading (i.e. if you start selling in 2026-27, register by 5 October 2027).
- Registration is free.
What you can deduct: Legitimate business expenses reduce your taxable profit. Common deductions for self-publishers include:
- Formatting costs
- Cover design fees
- Editing costs
- ISBN purchase
- Advertising spend (Amazon Ads, BookBub, etc.)
- Software subscriptions (Atticus, Vellum, etc.)
- Postage for author copies and Legal Deposit
- A proportion of home office costs (if you write at home)
Keep records: HMRC requires you to keep records of all income and expenses for at least five years. A simple spreadsheet is fine — you don't need accounting software for a small publishing operation.
Full guide: Self-Publishing Tax UK
Step 5: VAT on books
Books (both print and ebooks) are zero-rated for VAT in the UK. This has applied to print books for decades, and ebooks have been zero-rated since 1 May 2020.
What this means for you:
- You do not charge VAT on book sales in the UK.
- Amazon, which collects and remits VAT on marketplace sales, applies the zero rate automatically.
- If you sell direct from your own website, the same zero rate applies — no VAT on the book itself.
VAT registration: You only need to register for VAT if your total taxable turnover (across all business activities, not just books) exceeds the registration threshold (currently £90,000/year). Most self-published authors are well below this.
A note on non-book products: If you sell courses, coaching, or other services alongside books, those may be subject to standard-rate VAT (20%). The zero rate applies only to books and similar publications.
Worked example: total legal/admin cost for a first-time UK self-publisher
| Item | Cost |
|---|---|
| ISBN (single, from Nielsen) | £93 |
| Copyright page | £0 (you write it yourself) |
| Legal Deposit (postage to British Library) | ~£3 (Royal Mail) |
| HMRC self-employment registration | £0 |
| VAT registration | Not required (below threshold) |
| Total | ~£96 |
If you use KDP's free ISBN instead of buying your own, the total drops to approximately £3 — the cost of posting a copy to the British Library.
The only ongoing cost is filing a Self Assessment tax return each year once your income exceeds £1,000. You can do this yourself for free through HMRC's online portal, or pay an accountant (typically £100–£300/year for a simple sole trader return).
Common mistakes
Ignoring Legal Deposit. Many self-published authors don't know about this obligation. It is a legal requirement, and the British Library does follow up. It takes five minutes and costs a stamp.
Using someone else's ISBN. An ISBN identifies the publisher, not just the book. If you use an ISBN assigned to a vanity press or another publisher, they are listed as your publisher in all industry databases. Buy your own from Nielsen or use KDP's free one.
Not registering with HMRC until they contact you. If you earn over £1,000 from book sales, you are legally required to register. HMRC can charge penalties for late registration. Don't wait for them to find you — register proactively.
Confusing zero-rated with exempt. Zero-rated means the VAT rate is 0% but books are still within the VAT system. If you're VAT-registered, you can reclaim VAT on business inputs (formatting, design, ads) even though you charge 0% on sales. This is actually advantageous for VAT-registered publishers.
Thinking you need to register copyright. The UK has no copyright register. Your copyright exists automatically from the moment you write your work. There is no form to fill in, no fee to pay, and no government body to notify. A copyright page in your book is good practice but not a legal registration.
Checklist: copy and use
Use this as a pre-publication checklist. Tick each item off before or shortly after your book goes live.
- ISBN decided — using KDP free ISBN or purchased from Nielsen (£93 / £174 for 10)
- Copyright page written — includes copyright notice, year, your name, ISBN, edition info
- Legal Deposit planned — one copy to British Library within one month of publication
- HMRC status checked — will total self-employment income exceed £1,000 this tax year? If yes, register
- VAT not applicable — confirmed total turnover is below £90,000 (no registration needed)
- Records system set up — spreadsheet or accounting tool for income and expenses
FAQ
Do I need an ISBN to publish on Amazon KDP?
No. Amazon will assign a free ISBN to your paperback. However, the free ISBN is locked to Amazon, lists the publisher as "Independently published", and cannot be transferred to other platforms. If you want control over your imprint or plan to sell through bookshops and libraries, buy your own from Nielsen.
Do I need to register copyright in the UK?
No. The UK has no copyright register. Copyright arises automatically when you create an original work. Including a copyright notice on your copyright page is good practice but not a legal requirement.
What happens if I don't send a Legal Deposit copy to the British Library?
Technically, you are in breach of the Legal Deposit Libraries Act 2003. In practice, the British Library is more likely to write to you requesting a copy than to take legal action. But compliance is simple and free (except postage), so there is no reason not to do it.
When do I need to start paying tax on book royalties?
If your total self-employment income is under £1,000 per tax year, you owe nothing and don't need to file a return. Above £1,000, you must register as self-employed with HMRC and file a Self Assessment return. You pay Income Tax on your profit (income minus allowable expenses) at your marginal rate.
Are ebooks zero-rated for VAT in the UK?
Yes, since 1 May 2020. Before that date, ebooks were subject to 20% VAT while print books were zero-rated. Both are now zero-rated, meaning no VAT is charged on sales of either format in the UK.
Need your book formatted before you publish? See our formatting options from £69 → or run a free KDP Readiness Score to check your file is upload-ready.
