Plans sized to how much you write.
The outline and chapter one, free. Every paid plan has the same writing features and differs in monthly Book Credits; Author and Studio can also hide the "Made with Chapbook" badge on a book page. Every new account gets 60 promotional credits once, on any plan.
No card to start. Billed monthly, renewed until you cancel. Prices exclude applicable taxes.
Free
$0
No card. One project.
Start free- One book with its complete, editable outline
- A sample chapter up to 2,500 words, plus one redo, or a whole book that short
- One generated cover
- Watermarked PDF previews
Creator
$29 / month
Up to 43,750 drafted words a month.
About four lead magnets or one 25,000-word book a month
Start free- 350 credits a month
- Unlimited projects
- PDF, EPUB, Word and cover without the watermark
- A public book page with reader sign-up
- Extra credits that never expire
Author
$49 / month
Up to 106,250 drafted words a month.
About nine lead magnets or three 25,000-word books a month
Start free- 850 credits a month
- Unlimited projects
- PDF, EPUB, Word and cover without the watermark
- A public book page with reader sign-up
- Hide the "Made with Chapbook" badge
- Extra credits that never expire
Studio
$99 / month
Up to 275,000 drafted words a month.
About 25 lead magnets or eight 25,000-word books a month
Start free- 2,200 credits a month
- Unlimited projects
- PDF, EPUB, Word and cover without the watermark
- A public book page with reader sign-up
- Hide the "Made with Chapbook" badge
- Extra credits that never expire
Paid plans are bought inside Chapbook, after the free outline and sample chapter. Prices are in US dollars and exclude VAT or sales tax: Polar, our merchant of record, adds the tax for your country at checkout and shows the full total before you pay. A plan renews each month at the price shown until you cancel it from the billing page; cancelling stops the next renewal and keeps the plan to the end of the period you paid for.
Books a month on each plan.
Each kind at the length a new book of it starts at, priced all-in: the outline, every chapter and its pictures, one read-through, one cover and the launch kit. Research, rewrites and assistant replies come out of what is left. In the app, New book and the plan picker show this figure for your own book.
| Kind of book | One book, all-in | Creator | Author | Studio |
|---|---|---|---|---|
| Lead magnet 4,000 words | about 86 credits | 4 | 9 | 25 |
| Workbook 6,000 words | about 98 credits | 3 | 8 | 22 |
| Nonfiction book 25,000 words | about 265 credits | 1 | 3 | 8 |
| Brochure 600 words | about 93 credits | 3 | 9 | 23 |
| Illustrated guide 4,000 words | about 126 credits | 2 | 6 | 17 |
| Collection 4,000 words | about 202 credits | 1 | 4 | 10 |
| Newsletter 2,000 words | about 76 credits | 4 | 11 | 28 |
| Activity pack 16 pages, 12 to color; no read-through or launch kit | about 110 credits | 3 | 7 | 20 |
A busy month? Buy credits that never expire.
| Pack | Book Credits | Price |
|---|---|---|
| Small | 100 | $12 |
| Medium | 500 | $49 |
| Large | 1,500 | $119 |
Available on any paid plan. Top-up credits are spent only after your monthly and promotional credits, and stay usable if you cancel.
Fixed prices per action, shown before you start.
Text actions reserve credits from the length you ask for and refund what is not used. Generation is capped at the reserved length, so a model can never overspend your balance.
| Action | Book Credits |
|---|---|
| Titles, outline, or research plan | 10 |
| Web research batch | 5 |
| Source overview (full source or excerpts) | 2 per new source |
| Assistant reply | Actual cost, up to 5 per turn |
| Draft, rewrite, expand, or shorten text | 1 per 125 requested words, min. 4 per chapter or passage |
| A picture painted into a chapter | 5 each |
| Read-through of the whole book | 1 per 1,000 manuscript words, min. 10 |
| AI cover background | 20 per candidate; a cover job produces 1 (20) |
| Launch kit | 8 |
| Source extraction, manual editing, previews | Free |
| PDF, EPUB, Word and paperback files | Free on a paid plan |
Credit calculator
One book, all-in: planning, drafting every chapter and its pictures, one review, one cover batch of 1 and the launch kit. Revisions and research add to it.
- Titles, outline and research plan
- 10
- Drafting every chapter
- 38
- Pictures in the chapters
- 0
- One read-through of the whole book
- 10
- One cover batch (1 candidates)
- 20
- The launch kit
- 8
- About
- 86 credits
Fits in one month of Creator
$29 a month, 350 credits, leaving about 264 for revisions and research.
Your files stay yours.
- Everything you already generated stays downloadable.
- Purchased top-up credits stay usable for AI actions.
- Your manuscripts stay editable, and watermarked previews keep working.
- Creating a new clean PDF, EPUB, Word or cover export needs an active subscription. Resubscribing restores it.
- Existing clean exports are never watermarked or removed after the fact.
- Monthly credits expire at the end of each billing period and do not roll over.
Within 14 days of a payment, you get back what you have not used; the refund policy has the detail. The full rules are in the Chapbook terms.
Read a chapter of your own book before you pay for it.
The outline, one sample chapter up to 2,500 words and a watermarked cover are free: 60 Book Credits on sign-up, no card.