GS1 UPCs for Amazon Sellers: Single GTINs, Company Prefixes, and Multipacks

Amazon requires a unique product identifier — a GTIN, usually shown as a 12-digit UPC — to create most new listings. Amazon checks that number against the GS1 database and treats mismatches as invalid. The reliable way to get a code is to license it from GS1 US, not from a third-party UPC reseller.

Single GTIN or a Company Prefix

GS1 US has two main options. A single GS1 US GTIN costs $30, one time, with no annual renewal. It identifies one product — one variation — and you get a certificate and free access to GS1 US Data Hub to create the barcode and manage the product data. You do not receive a GS1 Company Prefix.

A Company Prefix lets you assign your own GTINs, up to the capacity you license, and is built for a growing catalog. It also supports things a single GTIN cannot, including higher packaging levels (cases and pallets), Serial Shipping Container Codes, and coupons. Prefix licenses must be renewed every year. If a prefix lapses, GS1 US says you are no longer authorized to use UPCs from that prefix, and your company may drop out of the GS1 company database retailers use to verify numbers.

Current GS1 US fees, as listed in November 2026 (always confirm on GS1 US's pricing page):

• 1 GS1 US GTIN: $30 initial, $0 renewal
• 10 identifiers (Company Prefix): $250 initial, $50 a year
• 100: $750 initial, $150 a year
• 1,000: $2,500 initial, $500 a year
• 10,000: $6,500 initial, $1,300 a year
• 100,000: $10,500 initial, $2,100 a year
• Company Prefix including a U.S. FDA NDC Labeler Code: $2,100 initial, $2,100 a year

Payments are non-refundable, and prefixes cannot be exchanged. GS1 US has a barcode estimator to help you count how many numbers you actually need. Count every size, color, flavor, and pack count as its own GTIN, and leave room for products you plan to launch in the next few years.

A single GTIN is a good fit if you are launching one product, or just a few, and you mainly need to list on Amazon. If you have many variations, expect to sell in retail or wholesale, or need case and pallet codes, the prefix is the better foundation. You can license a prefix later if you outgrow single codes; those earlier single GTINs stay licensed to the original products. The new prefix is additional capacity, not a replacement for numbers you already have.

Multipacks need their own UPC

A single item and a pack of that item are different sellable units. The 2-pack or 3-pack gets its own GTIN. Do not put the single-item UPC on the outer pack, and do not use it to create the Amazon listing for the multipack. On the listing, use the pack's UPC and set the item package quantity to the number of units inside. If the individual units still carry their own barcodes, cover them or face them inward so a warehouse scans the pack code.

GS1's non-reuse rule also means you generally cannot reassign an in-use single-item GTIN to the multipack, even if you discontinue the single. License a new number for the pack. The usual exception is a GTIN that was never published (PreMarket in GS1 US Data Hub), which can still be retracted.

Why you shouldn't change the first zero to a 1

A common seller shortcut is to take a 12-digit UPC that starts with 0 and change that first digit to 1, then use the new number on a multipack. That is not how GS1 works, and Amazon will often reject the result when it checks the GS1 database.

The first digit of a 12-digit UPC is part of the number itself, not a "multipack" flag. Changing it creates a different 12-digit code that usually is not licensed to you, and may already belong to someone else. The check digit would also be wrong unless it is recalculated — and even with a new check digit, a 12-digit number starting with 1 is still not a registered pack code.

There is a related, official method, and it is easy to confuse with that shortcut. Brand owners who have a Company Prefix can create a 14-digit GTIN (GTIN-14) for a case or inner pack of identical items: the same company prefix and item reference, a packaging indicator from 1 to 8 in front, a filler zero, and a new check digit. That GTIN-14 is meant for shipping cases — typically an ITF-14 barcode — not a retail UPC on a consumer 2-pack or 3-pack you sell on Amazon. If you only licensed a single $30 GTIN, you do not have a Company Prefix and cannot generate those 14-digit variants. For a consumer multipack, license a new 12-digit UPC from GS1 and put it on the outside of the pack.

Getting the code and avoiding Amazon rejects

Start with the GS1 US estimator, license the numbers you need, and assign them in Data Hub so the brand and product data in GS1 match what you enter on Amazon. Common reasons Amazon rejects a UPC include a brand name that does not match the GS1 record, a code that is not licensed to that brand (often one bought from a reseller), and the wrong identifier type — UPC for 12 digits, EAN for 13, GTIN for 14.

This is a practical first pass based on GS1 US and Amazon guidance as of November 2026, not a legal opinion. Confirm current fees and rules on GS1 US before you buy, and follow Amazon's latest listing requirements.

If you need help choosing the right identifier for a new pack or clearing up a UPC issue on a listing, get in touch.