There are two ways to publish a children’s book: convince a publisher to take it on, or publish it yourself. The traditional route costs you nothing but can take years and mostly ends in rejection — not because the books are bad, but because the numbers are brutal. The self-publishing route costs real money and effort, but the book definitely exists at the end of it. This guide covers both honestly, from a UK perspective — including the part most guides skip entirely: how a children’s book physically gets made.
First, know what you've written
Children’s publishing thinks in age bands, and everything downstream — word count, format, illustration, price — follows from where your book sits:
| Category | Age | Typical shape |
|---|---|---|
| Picture book | 0–6 | 32 pages, ~500 words or fewer, illustration leads, read aloud by an adult |
| Early reader | 5–7 | 32–64 pages, short sentences, heavily illustrated, read by the child |
| Chapter book | 7–9 | 5,000–15,000 words, line illustrations, short chapters |
| Middle grade | 9–12 | 30,000–55,000 words, novel format, few or no illustrations |
The 32-page picture book isn’t arbitrary — it’s the shape the format has settled into over a century because it suits both the rhythm of a bedtime story and the way books are printed (pages come in multiples of a folded sheet). Write to the conventions of your band; agents and parents both notice when you don’t.
Route one: traditional publishing
You write the book; a publisher buys the right to publish it, pays for everything, and pays you a royalty (typically a 5–7.5% share on a picture book, often split with the illustrator).
How it actually works in the UK:
- Most children’s publishers only read agented submissions. So in practice you’re querying literary agents first — the Writers’ & Artists’ Yearbook lists who represents children’s authors and what they want. A query is usually the full picture-book text (it’s only 500 words) or three chapters of a longer book, plus a short covering letter.
- Do NOT commission illustrations first. This is the most common and most expensive mistake in children’s publishing. Publishers pair authors with illustrators themselves — it’s a core part of what they do — and a pre-illustrated manuscript usually hurts a submission unless you are a professional illustrator yourself.
- Expect silence and years. Response times run months; from acceptance, a picture book typically takes another two years to reach shelves. The prize is real: distribution into actual bookshops, an advance, professional editing and design, and no financial risk to you.
- A handful of publishers take unagented submissions in open windows — check individual publishers’ websites for current policy, and never pay a “publisher” to read or publish your work. A publisher who charges you is not a publisher; that’s the vanity-press model our self-publishing guide warns about at length.
Route two: self-publishing
You are the publisher: you pay for editing, illustration and printing, and you keep control and the margin. For books with a ready audience — a class, a community, a school-visit circuit, a niche the trade won’t touch — this route is not a consolation prize; it’s often the better business.
The children’s-specific realities, in the order they’ll hit you:
1. Illustration is your biggest cost and your biggest quality lever
A fully illustrated 32-page picture book is typically 12–16 spreads of commissioned artwork. Professional picture-book illustration is skilled, slow work — budget accordingly (commonly four figures for a full book, varying enormously with experience and licence). Agree in writing: usage rights, file delivery (300 DPI at print size, ideally CMYK), revision rounds, and who keeps the originals. The Association of Illustrators publishes guidance on fair terms.
2. Editing still matters at 500 words
Picture-book text is closer to poetry than prose — every word is read aloud hundreds of times by tired adults. A professional children’s editor will catch the rhythm problems and the page-turn placement you can’t see in your own work.
3. Format decides your costs
Square and A4 formats suit illustration-led books; hardback is the gift and library standard; paperback travels to book fairs cheaply. Page count in multiples of four, 32 the convention. These choices set your print cost per copy, which sets your cover price, which decides whether the sums work — run them before the illustrator starts drawing to the wrong shape.
4. ISBNs, only if you're selling
A family book needs no ISBN at all. Selling through retailers does: UK ISBNs come from Nielsen, and our UK self-publishing guide covers the Nielsen process, costs, and why “free” platform ISBNs limit you; the free barcode generator turns your ISBN into a print-ready barcode.
5. Print-on-demand vs short-run printing
POD platforms (KDP, IngramSpark) print one copy per order — zero stock risk, but limited paper and binding choices, weaker colour control, and a per-copy cost that never falls. A short run from a real printer (from 10 copies) gets you heavier paper, sewn lay-flat binding, casebound hardbacks and a per-copy cost that drops steeply with quantity — which matters when you’re selling face-to-face at fairs and school visits, where most self-published children’s books actually sell. Many authors run both: POD for the long tail online, a proper short run for events and shops.
The production layer: what makes a children's book physically work
This is the part every other guide skips, and it’s where homemade books give themselves away:
- Lay-flat matters. Picture books are read open and flat with a child watching. Thread-sewn binding opens flat and lets artwork cross the spread; a glued spine curls the spread and eats the middle of the image.
- Paper weight signals durability. 150gsm coated paper is the picture-book standard — vivid colour, and a page that survives small hands. Story books step down to 115–130gsm; chapter books read like adult novels on 80gsm.
- Laminate the cover. Gloss or matt lamination is the difference between a cover that wipes clean and one that doesn’t survive the first juice incident.
- Mind the gutter. Brief your illustrator to keep faces and focal points away from the centre fold on spread-crossing art, and to build in 3mm bleed. (A good printer’s file check will catch this — ours is free.)
- Board books are a different machine. Rigid card pages are a specialist die-cut product most book printers (including us) honestly don’t make — if your book is for under-2s, seek out a board-book specialist; for 2–3 up, heavy paper in a sewn hardback does the job.
The full production detail — formats, papers, live prices from 10 copies — lives on our children’s book printing page.
What it costs, honestly
Traditional publishing: £0 — the publisher pays, you wait, and most submissions are declined. Self-publishing a picture book properly: illustration is the dominant cost, editing and design follow, and printing is the part you can see precisely in advance — price your exact spec in our calculator in under a minute. Selling 100 copies at a school visit at typical picture-book cover prices can recover the print cost several times over; recovering the illustration cost is the real business plan, and it’s why your realistic sales channel — not the dream of bookshops — should decide your budget.
Which route is yours?
Choose traditional if you want bookshop distribution, professional backing, and you can wait years and absorb rejection. Choose self-publishing if you have a real audience you can reach yourself, want the book to exist this year, and can fund illustration properly. And if you simply want twenty beautiful copies of a story for your family — that’s not a lesser ambition, it’s the oldest reason for printing a book, and it needs no agent, no ISBN and no permission.
Frequently asked questions
How much does it cost to publish a children's book in the UK?
Traditionally: nothing — the publisher pays for everything and pays you a royalty. Self-publishing a picture book properly: commissioned illustration is the dominant cost (commonly four figures for a fully illustrated 32-page book), followed by editing and design; printing is precisely knowable in advance — a short run starts at 10 copies and the per-copy price falls steeply with quantity.
Do I need an agent to publish a children's book?
For the traditional route, effectively yes — most UK children's publishers only read agented submissions, so you query literary agents first (the Writers' & Artists' Yearbook lists them). A few publishers run open submission windows. For self-publishing, no agent is involved at all.
Should I get my children's book illustrated before submitting to publishers?
No — this is the classic expensive mistake. Publishers pair authors with illustrators themselves, and a pre-illustrated manuscript usually weakens a submission unless you are a professional illustrator. Only commission illustration if you have decided to self-publish.
How many pages should a children's picture book have?
32 pages is the trade standard, with 24 and 40 as common variants. The convention exists because pages print in multiples of a folded sheet and because ~14 spreads suits the arc of a read-aloud story.
Can I publish a children's book just for my family?
Yes, and it's simpler than \"publishing\" suggests: no ISBN, no agent and no platform is needed. You commission or create the artwork, prepare a print-ready PDF and print from 10 copies. A sewn hardback picture book makes the kind of family object that outlasts everyone's phones.
Is it better to self-publish or traditionally publish a children's book?
It depends on what you're optimising for. Traditional publishing offers bookshop distribution and no financial risk, but takes years and mostly says no. Self-publishing costs real money (chiefly illustration) but guarantees the book exists and suits authors with a direct audience — school visits, fairs, a community. Neither is the lesser route; they're different businesses.