| Paperback | Hardcover | |
|---|---|---|
| Page range (black ink) | 24–828 | 75–550 |
| Print cost, 300 pp, regular trim | $4.60 | $9.25 |
| Print cost formula (110+ pp) | $1.00 + $0.012/page | $5.65 + $0.012/page |
| Short-book flat rate | $2.30 (24–110 pp) | $6.80 (75–108 pp) |
| Trim sizes | Full menu (14 sizes) | A subset — check before designing |
| Binding | Perfect-bound card cover | Case laminate (art printed on the boards) |
| Cover file | Wraparound PDF, 0.125″ bleed | Different, larger file — wraps the boards |
| Royalty | Identical: 60% of list price minus print cost (50% if priced under $9.99) | |
| ISBN | Each format needs its own ISBN — hardcover can't share the paperback's | |
The differences that bite
The 75-page floor. A 60-page children's book or a slim poetry collection simply cannot be a KDP hardcover. Under 75 pages, paperback is the only KDP option (IngramSpark's hardcover minimums differ — one of several asymmetries in KDP vs IngramSpark).
The 550-page cap. Big reference books and omnibus editions that fit easily in paperback (up to 828 pages) hit a wall in hardcover.
The cover is a different file. A hardcover's cover wraps around rigid boards, so the cover PDF is built to a different template than the paperback wraparound — wider, with wrap allowance past the trim. Uploading your paperback cover to a hardcover edition is a guaranteed size mismatch. Build from KDP's hardcover template for your trim and page count.
The interior usually transfers. Same trim, same page count, same bleed choice — the interior PDF that passed for the paperback generally passes for the hardcover. The work is the cover and the metadata, not the book block.
Fewer trim sizes. Hardcover is offered in a subset of the paperback list. If your paperback is 5×8 or a landscape size, there may be no matching hardcover at all — decide before you design, using the trim size comparison.
The money, worked once
A 300-page black-ink book, regular trim: paperback prints for $4.60, hardcover for $9.25. At a $14.99 list price the paperback earns 0.60 × $14.99 − $4.60 = $4.39. The hardcover at the same price earns −$0.26 — which is why KDP won't allow it: the minimum list price is print cost ÷ royalty rate, $15.42 here. Price the hardcover at $24.99 and it earns $5.74 — barely ahead of the paperback at $14.99. The hardcover premium is real money spent by the reader on the object, not a royalty upgrade for you. Run your own numbers in the royalty calculator (it does both formats).
Adding a hardcover edition of a book we should check first? Send us your interior and cover files and we'll run the full check — and tell you plainly whether the paperback cover and interior transfer, or what needs rebuilding. The check is free. Get the free check →
When hardcover earns its keep
- Gift and keepsake books — children's picture books, family histories, memorial editions: buyers are purchasing an object.
- Reference and cookbooks that live open on a counter and get handled hard.
- Libraries and collectors, especially alongside an IngramSpark edition, where hardcover is the institutional default.
- Almost never for a first novel or a price-sensitive category: the paperback will outsell it several times over, at a better royalty per sale.
The honest limit
Hardcover on KDP is case laminate only — no dust jacket, no cloth. If the edition in your head has a jacket, that's an IngramSpark product (they offer jacketed and cloth options), with its own templates and its own ISBN. And because the fixed print cost is $4.65 higher at every page count, there is no page count at which the hardcover “catches up” — it wins on price tolerance, or it doesn't win.
Or send us the files — the check is free
Email your interior and cover PDFs and we'll tell you exactly what's wrong — in plain English, free, within 48 hours. If it does need fixing, the by-hand fix is $19 and we redo it free if KDP rejects it for a formatting issue we were hired to fix. We rebuild files to be compliant with KDP's published spec — that's the promise we can keep.