GS1, GTIN, UPC and EAN: Barcode Terms Explained

License one GS1 GTIN for one eligible variant

This is the focused route when a business has one product variant and does not need to allocate a larger set of identifiers immediately. Confirm the owner, brand, product description, and packaging level before the number is assigned, then use the resulting data to create suitable symbol artwork.

Use a GS1 Company Prefix for multiple identifiers

A company prefix is a business-specific foundation for creating multiple identification numbers within an approved capacity. It can suit a portfolio with planned variants or packaging levels, but the licence terms, capacity, and annual obligations come from the relevant GS1 Member Organisation.

Validate an existing GTIN before changing packaging

If a product already has a number, confirm its owner and record before generating a new symbol. Compare the product description, brand, variant, pack quantity, and packaging level. A valid existing identifier can be more useful than creating a duplicate.

Separate number assignment from barcode artwork

Assign or confirm the identifier first. Only then ask a competent designer or packaging supplier to generate the required symbol at an appropriate size, quiet zone, contrast, and print quality. Test the finished symbol rather than assuming a downloaded image scans correctly.

Product-change decision 1: identify the level that changed

Build one row per trade item: consumer unit, physical multipack, fixed assortment, separately ordered case and other relevant packaging levels. Compare the old and proposed brand, net content, formulation, dimensions, gross weight and quantity. A new internal SKU or marketplace listing is not itself a GS1 allocation rule. For a new flavour or size, evaluate it as a distinct product/variant rather than reusing a neighbouring variant's number. Use sector-specific rules where applicable; this checklist is not a healthcare or regulated-product ruling.

Product-change decision 2: separate declared content from case quantity

GS1 requires a new GTIN for any increase or decrease to legally required declared net content printed on the pack, including weight, volume or count. Its rule assigns new numbers to the changed base item and existing higher packaging levels. A case quantity change is different: changing how many unchanged trade items a case contains requires a new case-level GTIN and the applicable higher-level updates, not a new consumer-unit number merely because the shipping case changed. Do not apply the dimensions percentage threshold to net-content changes.

Product-change decision 3: distinguish multipacks and fixed assortments

A sellable physical multipack is not just an internal SKU alias for its component. Record its count, composition and packaging level separately. GS1 defines a predefined assortment as a fixed physical combination of two or more trade items sold together. Changing, adding or replacing one of those items requires a new assortment GTIN and numbers at existing higher packaging levels. Its constituent trade items have their own identifiers distinct from the assortment. Do not assume a virtual marketplace bundle follows the same identification path without checking the actual product and channel rules.

Product-change decision 4: check formulation and packaging rules precisely

For declared formulation/functionality, the consulted GS1 rule requires both a change affecting legally required declared packaging information and an expectation that consumers or supply-chain partners distinguish it. Do not turn this into a claim that every ingredient edit always requires a new number. A change over 20% to any physical dimension or gross weight requires a new GTIN under the separate dimensions rule. Staying under 20% does not waive another rule; repeated small changes to evade the threshold are not acceptable. Record the applicable rule and ask GS1 about ambiguity before printing.

Hypothetical example: smaller jar, unchanged shipping quantity

A fictional brand changes a jar's declared net content from 450 g to 420 g and continues shipping twelve jars per case. The declared-content rule requires a new jar GTIN and new numbers at existing higher packaging levels even if the artwork barely changes. Keeping twelve per case does not cancel the content change. The team records old/new data, separates remaining old stock, informs trading partners and follows each channel's update process. A new number does not automatically grant a new marketplace listing.

Hypothetical example: new case count and revised gift set

A fictional seller changes a case of unchanged bottles from six to eight: review the case and higher packaging levels, retaining the bottle's number if no other item rule is triggered. Separately, replacing one flavour in a fixed physical gift set changes the assortment and requires a new set identifier under GS1's assortment rule. These are two different changes, not one blanket instruction to renumber every bottle. The brand owner records and approves the allocation decision before artwork and product data are released.

How Nomadic Go helps

Nomadic Go can review the product and variant information, compare a single-GTIN route with a company-prefix route, and assist with one eligible product variant through the GS1 route. Our professional service is quote-first and does not replace the GS1 Member Organisation. Issuer licence charges, renewals, packaging design, printing, testing, product approvals, and any retailer review remain separate unless expressly listed in an approved scope. We can help keep the number, product data, and handover organised, but we do not guarantee that a retailer or marketplace will list the product.

Important limitations: Nomadic Go provides assistance and coordination services only. We do not guarantee approval of any bank account, visa, or company registration application. All final decisions rest with the relevant bank, government authority, or regulatory body. We do not provide tax advice, legal opinions, or financial advice.

Are GTIN, UPC, and EAN the same thing?

GTIN is the broader GS1 term for a Global Trade Item Number. GTIN-12 is commonly called UPC, while GTIN-13 is commonly called EAN or JAN. A retailer may use one of those terms for the format it expects, so confirm the required length and symbol rather than relying on a label alone.

Is a barcode the same as a GTIN?

No. The GTIN is the product identifier number. The barcode is a visual symbol that encodes data so a scanner can read it. A valid number can still have a poorly produced symbol, and a readable symbol does not prove that its number is legitimately assigned to the business.

Does every product variant need a different GTIN?

Not every change has the same treatment, but material differences such as a size, flavour, quantity, or formulation can create a new trade item. Review the applicable GS1 rules and channel requirements before reusing a number or assigning a new one.

Can I generate a UPC or EAN image online for free?

A generator may create an image, but it does not establish that the underlying number is unique, licensed, or associated with your business. Use an appropriate GS1 route or verify an existing identifier before putting it on packaging or submitting it to a channel.

Do I need a company prefix if I only have one product?

Not necessarily. GS1 US describes a single-GTIN route for a small number of identifiers, while a company prefix supports multiple allocations within its capacity. Compare the current product count, expected variants, packaging levels, and the issuer terms before choosing.