Key Takeaways
- A lot code, lot number, batch code, batch number, or code number identifies a unique group of products made together under the same conditions.
- A serial number identifies one unit, while a lot code applies to the same batch of similar products.
- Lot tracking improves inventory management, quality control, recalls, and regulatory compliance, including FDA food traceability rules originally targeted for January 2026, with enforcement now delayed.
- Orders In Seconds (OIS) helps connect lot codes with orders, warehouses, sales reps, delivery routes, and ERP systems in real time.
- Lot codes are typically printed or encoded in barcodes and QR codes on product packaging to support traceability throughout the supply chain.
If you have heard a customer ask, “Which batch did this come from?” you already know why lot codes matter. For distributors and manufacturers, the right lot code system can be the difference between a quick response and a costly recall.
Table of Contents
- What Is a Lot Code (Lot Number / Batch Code)?
- Lot Codes vs Serial Numbers, SKUs, and Other Product Codes
- Why Lot Codes Matter for Inventory Management and Recalls
- What Is Lot Tracking and How Does It Work?
- Designing Effective Traceability Lot Codes
- Printing and Encoding Lot Codes on Product Packaging
- Using Lot Codes in Wholesale Distribution Workflows
- How Orders In Seconds (OIS) Supports Lot Tracking and Traceability
- Best Practices for Implementing Lot Code Traceability
- FAQ
- Conclusion
What Is a Lot Code (Lot Number / Batch Code)?
A lot code is an identification number assigned to a specific quantity or group of products from a single manufacturer, often referred to as a lot number, batch number, or code number. It is a unique identifier for products made together under the same conditions, usually during one production run.
Lot codes are typically a combination of numerical digits and letters assigned to groups of similar products. They help identify products for tracking, quality control, and management purposes. A lot code may include the production date, location, line, shift, materials, or recipe version.
Lot codes are usually printed on product packaging alongside time and date codes, and they are essential for inventory management and product traceability. They are typically printed on a bottle neck, can bottom, carton flap, label edge, case label, or pallet label.
Examples:
- Food and beverage: FB260519-BR-03 for food packaging from brewery batch 03.
- Cosmetics: CM-NYC-0526-B2 for a batch made in New York.
- Pharmaceuticals: PH-XY-240519-02 for manufacturing line and date tracking.
- Industrial components: IC-PLT-260519-L2 for components from plant line 2.
Lot Codes vs Serial Numbers, SKUs, and Other Product Codes
Lot codes work alongside SKUs, barcodes, QR codes, and serial numbers. They do not replace them.
A lot code is a unique identifier assigned to a specific quantity or group of products from a single manufacturer, while a serial number is a unique alphanumeric code assigned to an individual product, distinguishing it from all others of the same model or batch. Unlike lot codes, which are the same for all items in a batch, serial numbers are unique to each individual item, allowing precise identification and tracking of specific products, warranty claims, or repairs, and helping the support team distinguish one unit from another when handling assistance requests.
A Stock Keeping Unit (SKU) is a unique identifier used by retailers to track individual products within inventory systems, while a lot code is used to track a batch of products produced together, often for quality assurance and recall purposes.
Code Type | What It Identifies | Typical Use |
SKU / product code | Product type and product differentiation | Ordering and stock control |
Lot code | Specific lot or affected lot | Recalls and traceability |
Serial number | Individual products | Warranty claims |
Barcode | SKU, GTIN, or lot data | Scanning workflows |
QR code | Product, batch, URL, or history | Digital tracking |
Barcodes, QR codes, and lot codes all serve to improve product traceability and inventory management, but they differ in their specific applications and the type of information they encode.
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Why Lot Codes Matter for Inventory Management and Recalls
For wholesale distributors, lot codes provide actionable supply chain traceability for inventory control, regulatory compliance, and rapid product recalls. Distributors and retailers use lot codes to track inventory as it moves through the supply chain.
Without lot codes, a contamination or defect would require a manufacturer to recall all products. With lot tracking, companies can isolate affected products and remove only unsafe products tied to the affected lot.
For example, if a peanut butter recall affects lots produced between 2025-09-10 and 2025-09-15, a distributor can decide which customer invoices, warehouses, and delivery routes included that specific lot. That lowers cost, protects consumers, and preserves trust in the brand.
Traceability requirements such as those under the FDA’s Food Safety Modernization Act require robust lot code systems to protect public health. The FDA’s Food Traceability Rule uses traceability lot codes and records for certain foods. Records are expected to support fast retrieval; enforcement deadlines have shifted, so companies should verify current FDA guidance.
What Is Lot Tracking and How Does It Work?
Lot tracking, also known as batch tracking, is a system for tracking, tracing, and accessing product information throughout the supply chain from start to finish, utilizing barcodes, scanners, and inventory management software.
Lot tracking captures lot numbers at receiving, production, picking, shipping, returns, and transfers. Forward traceability shows which customers received a lot. Backward traceability shows which suppliers, raw materials, and production process created it.
A simple timeline might look like this:
- January 2026: raw materials arrive with supplier lot codes.
- February 2026: materials are transformed into finished goods.
- March 2026: finished goods ship to specific customers.
Lot tracking systems are essential for inventory control and crisis avoidance during recalls, allowing companies to quickly identify and remove affected products from the market. The implementation of lot tracking systems can significantly improve the efficiency of recalls, as they enable businesses to trace the origin and distribution of products, ensuring consumer safety and compliance with regulations.
Designing Effective Traceability Lot Codest
A strong code format is easy to read, hard to duplicate, and useful to your system.
Common formats include:
- YYMMDD-LINE-BATCH: 260519-A-03
- Plant-date-shift: PL2-260519-N
- GS1-style: GTIN plus internal batch code
Avoid confusing characters like O/0 and I/1. Keep the code short enough for manual input, but structured enough for reports. Use different numbers for different products, plants, and runs.
Traceability lot codes must be unique per lot and linked to master data such as bill of materials, quality tests, expiration date, storage conditions, and supplier records. This supports traceability throughout the supply chain when quality issues happen.
Printing and Encoding Lot Codes on Product Packaging
Lot codes can appear as human-readable text, barcodes, QR codes, or a combination. The best solution is often both: readable text for inspectors and a scannable code for warehouse speed.
Thermal inkjet (TIJ), laser marking, continuous inkjet (CIJ), and thermal transfer (TTO) printers are commonly used technologies for printing lot codes on products and packaging. Thermal transfer printers use heat to transfer ink from a ribbon onto labels, films, or flexible packaging, making them suitable for printing lot codes. Laser coders mark information such as batch numbers and expiration dates directly onto product surfaces using a focused laser beam, ensuring precise and permanent coding.
Choose ink and placement that survive refrigeration, condensation, transportation, and handling. This is especially important in food and beverage distribution.
Using Lot Codes in Wholesale Distribution Workflows
In B2B distribution, lot numbers should be captured at receiving against purchase orders, linked to bin location, and made visible to sales reps checking stock.
Picking should follow FEFO, or First Expired, First Out. Scan-based lot selection helps prevent shipping expired or soon-to-expire stock to a key customer. Route teams can scan lot codes on the truck, at delivery, and on returns to keep tracking records synchronized.
Systems like Orders In Seconds (OIS) help users see available inventory by lot number, commit a specific lot to sales orders, and push that detail into ERP and accounting platforms like QuickBooks, SAP, Sage, or NetSuite.
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How Orders In Seconds (OIS) Supports Lot Tracking and Traceability
Orders In Seconds is a cloud-based order management and inventory visibility solution for B2B wholesalers and CPG manufacturers in the United States and Canada.
OIS can store and display lot numbers per SKU, per warehouse, and across field sales, inside sales, and B2B eCommerce. Sales reps can select the product SKU and the specific lot code from a mobile device, helping ensure accurate fulfillment.
OIS also supports ERP integrations so lot-level shipments, returns, invoices, and operational records stay aligned. During recalls, teams can quickly generate reports showing which customers received a batch code.
Best Practices for Implementing Lot Code Traceability
Use this checklist to improve lot tracking in 2026:
- Standardize lot code rules across plants, suppliers, 3PLs, and copackers.
- Document rules in a written traceability plan.
- Train warehouse and sales teams using real photos of packaging.
- Run mock recalls by selecting one lot code and tracing affected inventory, shipments, and customers.
- Replace spreadsheets with centralized software that reduces manual input and audit gaps.
FAQ
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Where can I usually find the lot number on a product?
Lot numbers are often printed near date codes on bottles, jars, cans, cartons, or outer cases. Check the bottom, crimp area, side panel, cap, or label edge. If unclear, contact the manufacturer or distributor with photos.
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Do small distributors really need full lot tracking?
Yes. Even small companies face recalls, chargebacks, and customer service risk. Modern SaaS tools like OIS make lot tracking easier with mobile apps, scanners, and cloud records instead of paper logs.
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How long should I keep lot code and traceability records?
Retention depends on industry, regulation, and contract terms. Food distributors often keep records for years, while pharma may require longer. Align with FDA, CFIA, and customer requirements.
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Can I change a lot code after repackaging or kitting?
Yes, but only if backward traceability is preserved. If you assign a new internal lot number after kitting, relabeling, or breaking cases, keep links to the original supplier batch codes.
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How do lot codes interact with barcodes and QR codes in practice?
The visible lot code can be mirrored inside a GS1-128 barcode or QR code. A scanner can send the product identifier and traceability lot code into the order or inventory system in one scan.
Conclusion
Lot codes are essential for inventory management, product safety, compliance, and fast recalls. The right solution helps companies manage stock, identify affected products, protect consumers, and support traceability from production to delivery.
If your team is ready to move beyond spreadsheets, Orders In Seconds can help connect lot tracking with orders, inventory, routes, and ERP systems.
