Plans sized to how much you write.
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. Monthly billing only. Cancel any time. 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 batch of cover candidates
- Watermarked PDF previews
Creator
$29 / month
2 copies at $14.99, sold direct, cover a month.
Start free- 300 credits a month
- Unlimited projects
- PDF, EPUB and cover without the watermark
- A public book page with reader sign-up
- Extra credits that never expire
Author
$49 / month
4 copies at $14.99, sold direct, cover a month.
Start free- 750 credits a month
- Unlimited projects
- PDF, EPUB 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
7 copies at $14.99, sold direct, cover a month.
Start free- 2,000 credits a month
- Unlimited projects
- PDF, EPUB 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. Payments are processed by Polar, our merchant of record. The break-even line is arithmetic for a book sold from your own site or Gumroad at $14.99, not a forecast of sales; store royalties differ.
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 AI summary | 1 per 2,000 source words, min. 2 |
| Draft, rewrite, expand, or shorten text | 1 per 125 requested words, min. 4 |
| Read-through of the whole book | 1 per 1,000 manuscript words, min. 10 |
| AI cover background | 20 per candidate; a cover job produces 2 (40) |
| Source extraction, manual editing, previews | Free |
| PDF and EPUB export | Free on a paid plan |
Credit calculator
A first draft: planning, drafting, one review and one cover batch of 2. Revisions and research add to it.
- Titles, outline and research plan
- 10
- Drafting every chapter
- 32
- One read-through of the whole book
- 10
- One cover batch (2 candidates)
- 40
- About
- 92 credits
Fits in one month of Creator
$29 a month, 300 credits, leaving about 208 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 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.
Refunds follow the refund policy. 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.