KDP trains authors to think of the barcode as Amazon's problem — its free ISBN prints the barcode for you. IngramSpark is the opposite arrangement: the ISBN is yours, the barcode is printed from your cover file's back panel, and Ingram reserves a specific zone for it. Art, text, or a background texture inside that zone gets printed over — or gets the file flagged before printing.
The zone, exactly
- Size: 1.75″ wide × 1″ tall, at the bottom-right of the back cover (inside the trim, not in the bleed).
- The barcode itself is 100% black on a white box. If you supply your own barcode image, it goes in that zone on a clean white background — never reversed out of a dark cover, never tinted.
- If you don't supply one, Ingram places one for you — in the same zone, on top of whatever is there. “I didn't put a barcode on my cover” does not keep the zone empty; it just means you didn't choose what it covers.
- The ISBN must be yours. IngramSpark does not offer a free ISBN, and a KDP free ISBN cannot be used — it names Amazon as the imprint of record. No valid, publisher-owned ISBN, no Ingram title.
| KDP | IngramSpark | |
|---|---|---|
| Barcode zone to keep clear | 2 × 1.2″, back-cover bottom-right | 1.75 × 1″, back-cover bottom-right |
| Who supplies the ISBN | Free Amazon ISBN available | Your own ISBN required |
| Who places the barcode | KDP prints its barcode on its copies | From your cover file — or Ingram places it in the zone |
| Price in the barcode | Optional | Optional — a price-free barcode keeps price changes off the cover file |
One practical note on price: printing your retail price inside the barcode (the EAN-5 add-on) means every future price change needs a new cover file. Revisions are free at IngramSpark since February 2026 (see the revision-fee change), so the cost is now time and re-proofing rather than a fee — but a price-free barcode keeps pricing a metadata edit instead of a file project. Our ISBN & barcode rules guide covers the shared ground.
Check it yourself
- Open the cover PDF and find the back cover's bottom-right corner, inside the trim line (not the bleed).
- Measure a 1.75 × 1″ rectangle up and left from that corner. Is anything in it — a blurb line, a logo, an author photo edge, a dark background with no white box?
- If you placed your own barcode: is it 100% black, on white, and does the number under it match the ISBN in your title setup, digit for digit?
- Check the ISBN itself: it must be an ISBN you own (bought from Bowker/your national agency or bought through IngramSpark), not a KDP free ISBN.
Not sure your cover survives IngramSpark? Send us the cover and interior PDFs — the free check covers the barcode zone, spine-by-PPI, blank final page, fonts, and margins, and reports back in plain English within 48 hours. Get the free check →
How to fix it
Clear the zone
Move blurbs, logos, and photos up or left until the 1.75 × 1″ corner is empty background. If your back-cover design is dark, that's fine — leave the zone empty and let the placed barcode's white box sit there, or supply your own barcode on its white box in the zone.
Place your own barcode
Generate the barcode from your ISBN (your ISBN agency's tool, IngramSpark's template, or any reputable barcode generator), 100% black on white, sized to the zone, and verify the encoded digits against your ISBN-13 character by character — a transposed digit is a different book, and this error surfaces at retail, not at upload.
The honest limit
If the ISBN on the cover belongs to someone else — a KDP free ISBN, a vanity imprint you don't control — no cover edit fixes it. The ISBN has to be replaced at the title level, which for a published book usually means a new edition. Check the ISBN before you fall in love with a cover.
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 IngramSpark rejects it for a formatting issue we were hired to fix. We rebuild files to be compliant with the platform's published spec — that's the promise we can keep.
Prefer the whole library in one file? The KDP Rejection Field Guide (free PDF) collects every guide, table, and the 13-point checklist.
More from the Help Library
- The KDP & IngramSpark Help Library — all guides & tools
- IngramSpark spine width — the PPI calculation
- IngramSpark cover bleed — 0.125″ on all four sides
- IngramSpark: your final page must be blank
- KDP vs IngramSpark — fees, reach, ISBN rules, using both
- Spine width calculator — KDP and IngramSpark math
- ISBN & barcode rules for KDP and IngramSpark
- The free rejection check — all 13 checks at once