Amazon Barcode Requirements 2026: Everything Sellers Need to Know

Amazon's barcode requirements trip up more new sellers than almost any other part of FBA. It's not that the rules are complicated — it's that there are several different barcode types involved, and confusing them causes real problems: rejected shipments, stranded inventory, and unexpected fees.

Let's sort it out properly.

The Two Types of Barcodes Amazon Accepts

1. FNSKU Label (Recommended for Most Sellers)

FNSKU stands for Fulfillment Network Stock Keeping Unit. It's Amazon's internal identifier — unique to you as a specific seller. When Amazon scans your FNSKU, they know exactly which seller's inventory that item belongs to.

To use FNSKU labels:

1. List your product in Seller Central
2. Go to Manage Inventory → Print item labels
3. Amazon generates the FNSKU code (looks like X001ABC123)
4. Generate the CODE128 barcode image free at barkodkarekod.com
5. Print and apply over any existing manufacturer barcode

2. Manufacturer Barcode (UPC or EAN-13)

If your product already has a manufacturer UPC-A or EAN-13 barcode, and you're enrolled in Amazon's Commingled Inventory program, you can use the manufacturer barcode without applying an FNSKU label.

However, commingling means your units may be mixed with other sellers' units of the same product. Most experienced sellers avoid this and use FNSKU labels instead.

Amazon's GTIN Requirements — What Changed

In recent years, Amazon has significantly tightened its GTIN requirements for product listings. Here's the current state:

• New product listings generally require a valid GS1-registered GTIN (UPC or EAN-13) to create the listing
• Amazon verifies GTINs against the GS1 database — barcodes from resellers may be rejected
• GTIN exemptions exist for certain categories including handmade products, bundles, private label with brand registry, and some other cases

FNSKU vs UPC vs EAN-13 — Which Should You Use?

This is genuinely the most confusing part for new Amazon sellers. Here's the clearest breakdown we can give:

In practice, most FBA sellers use FNSKU labels on their physical products, and provide a UPC or EAN-13 when creating the product listing in Seller Central.

Barcode Technical Requirements

Getting the barcode type right is only half the battle. Amazon also has specific technical requirements for the barcode image itself:

• Minimum label size: 1 inch × 2 inches (25.4mm × 50.8mm)
• Minimum DPI: 300 DPI — use SVG format for crisp print at any size
• Quiet zone: Minimum 1/8 inch (3.2mm) clear space on each side of the barcode
• Placement: On a flat, uninterrupted surface — not spanning seams, edges or curves
• Coverage: Must completely cover any existing manufacturer barcode
• Contrast: Black bars on white background — no colored backgrounds
• Human-readable text: The FNSKU code must appear as text below the barcode

How to Apply Amazon Barcode Labels

A few practical things that save time and prevent errors:

• Apply before boxing — label individual units before packing them into shipping boxes. It's much harder to label correctly once items are packed.
• Use a label applicator for high volume — it keeps labels straight and positioned consistently.
• Test scan every batch — before sealing boxes, scan a few labels with your phone to confirm they're reading correctly.
• Cover, don't layer — one layer of FNSKU label over the manufacturer barcode is sufficient. Multiple layers of labels can peel in the warehouse.

What Happens If Your Barcode Fails?

Amazon's warehouse scanners are fast and unforgiving. If a barcode can't be read:

• Labeling service fee: Amazon will charge you to re-label items (currently around $0.20–0.55 per unit)
• Shipment rejection: Some categories result in the entire shipment being returned
• Stranded inventory: Units may sit in the warehouse as "unfulfillable" until re-labeled
• Receiving delays: Unidentified units can take weeks to process instead of days

GTIN Exemptions — When You Don't Need a GS1 Barcode

If you can't get a GS1-registered barcode, Amazon does offer GTIN exemptions for certain situations. To apply:

1. Go to Seller Central → Inventory → Add a Product
2. Search for your product category
3. Select "I'm exempt from GTIN requirements"
4. Amazon reviews and approves within 1–3 business days

Exemptions are commonly granted for private label brands, handmade products, multi-packs and bundles. They're not available for all categories, and Amazon may require you to enroll in Brand Registry first.

Frequently Asked Questions

Does Amazon require barcodes for FBA?

Yes. Every FBA unit needs either an FNSKU label or a manufacturer barcode (UPC/EAN-13). Most sellers use FNSKU labels to prevent commingling.

Can I use a free barcode generator for Amazon?

Yes, for generating the barcode image. Amazon assigns the FNSKU code in Seller Central. Once you have it, generate the CODE128 image free at barkodkarekod.com.

What is the difference between FNSKU and UPC on Amazon?

FNSKU is Amazon's internal identifier — unique to you as a seller. UPC/EAN is the product's global identifier. FNSKU prevents your inventory from being mixed with other sellers' stock.

Do I need a GS1 barcode to sell on Amazon?

For creating the listing, usually yes. But GTIN exemptions are available for private label, handmade and bundle products. For the physical label on the product, FNSKU bypasses the GS1 requirement.

What happens if my barcode doesn't scan?

Amazon charges a re-labeling fee, may reject the shipment, or hold the inventory as unfulfillable. Always test-scan labels before sealing boxes.