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What Does FIFO Mean, and When Should It Be Used?

What Does FIFO Mean, and When Should It Be Used?

Written By
Hafez Ramlan
Last Updated:
July 29, 2026

FIFO stands for "First In, First Out," an inventory management method in which the oldest stock (the "first in") is sold, used, or shipped out first. This keeps inventory moving in the order it arrived, which reduces the risk of products expiring, becoming obsolete, or getting damaged during long storage.

In the world of inventory management and logistics, FIFO is a term that frequently pops up. But for those unfamiliar with the concept, you might be asking, "What does FIFO mean, and why is it so important?" Understanding FIFO can significantly improve inventory efficiency, reduce waste, and optimize logistics operations.

In this article, we'll explore what FIFO stands for, how it works, and when to use it. We'll also touch on related concepts like the FIFO inventory method, the FIFO formula, FIFO vs. LIFO, and how businesses like Atomix Logistics leverage such methods for success.

What Does FIFO Stand For?

FIFO stands for First In, First Out. It is an inventory management method where the oldest inventory items (the "first in") are sold, used, or shipped out first. This ensures that stock moves in a logical order and reduces the chances of items expiring, becoming obsolete, or damaged due to long storage periods.

What Is the FIFO Meaning and Definition?

The definition of FIFO is straightforward: it's a systematic way of managing inventory by processing items in the order they were received. This approach ensures efficient stock rotation and is especially useful in industries dealing with perishable goods like food, beverages, or pharmaceuticals.

Key Highlights of FIFO:

  • FIFO means items are prioritized based on their arrival time.
  • FIFO refers to minimizing waste by using the oldest inventory first.
  • FIFO requires meticulous tracking of inventory dates to maintain accuracy.

How Does the FIFO Method Work?

The FIFO method is based on the principle of selling or using the oldest inventory first. Here's a step-by-step breakdown:

Receiving Inventory

  • As new inventory arrives, it is logged with a receipt date.

Stock Organization

  • Items are stored in a way that the oldest stock is easily accessible.

Restocking and Rotation

  • When restocking shelves or fulfilling orders, employees pull the oldest stock first.

Tracking and Adjustments

  • Inventory management systems, often using a FIFO calculator, help businesses track stock movement and ensure compliance with the FIFO method.

FIFO vs. LIFO: What's the Difference?

FIFO is often compared with LIFO (Last In, First Out), the opposite approach, in which the newest inventory is sold or used first. The two methods can produce very different cost of goods sold (COGS) and inventory valuations, especially when purchase prices change over time. The table below summarizes the key differences:

FactorFIFO (First In, First Out)LIFO (Last In, First Out)
Order of useOldest inventory is sold or used firstNewest inventory is sold or used first
Best suited forPerishable and time-sensitive goodsNon-perishable goods in specific accounting scenarios
COGS when prices are risingLower COGS (older, cheaper costs are recorded)Higher COGS (newer, higher costs are recorded)
Reported profit when prices are risingHigher reported profitLower reported profit
Ending inventory valueReflects the most recent (current) costsReflects older costs
Accounting standardsPermitted under both GAAP and IFRSPermitted under US GAAP; not allowed under IFRS

For most ecommerce and DTC brands shipping physical products, FIFO is the more natural fit because it mirrors how goods actually move through a warehouse.

What Are the Benefits of Using the FIFO Method?

Understanding what FIFO means isn't just about knowing the term; it's about realizing its advantages. Here's why businesses choose FIFO:

Minimizes Waste

  • The FIFO inventory method ensures that perishable goods are used before their expiration date.

Improves Accuracy

  • By tracking stock movement systematically, FIFO helps maintain accurate inventory records.

Enhances Customer Satisfaction

  • Customers receive fresh products, especially in industries like food and beverages.

Compliance with Accounting Standards

  • Many financial reporting standards favor FIFO for valuing inventory, as it closely mirrors the actual flow of goods.

When Should the FIFO Method Be Used?

The FIFO method is ideal for businesses that handle:

  • Perishable Goods: Food, pharmaceuticals, and cosmetics.
  • Time-Sensitive Products: Technology or fashion items that lose value over time.
  • Seasonal Stock: Goods with fluctuating demand based on seasons.

For example, how do you use the FIFO method to restock food? Restaurants and grocery stores employ FIFO to ensure the oldest stock is sold or used first, reducing food waste and maintaining quality.

How Do You Calculate FIFO?

To better understand how to calculate FIFO, let's break it down using a simple example:

Inventory Details

  • Batch 1: 100 units at $10 each.
  • Batch 2: 200 units at $12 each.

Sales Transaction

  • Sold: 150 units.

FIFO Calculation Formula

  • First, take from Batch 1: 100 units x $10 = $1,000.
  • Then, take from Batch 2: 50 units x $12 = $600.

Total Cost of Goods Sold (COGS): $1,000 + $600 = $1,600.

The remaining inventory includes:

  • 150 units from Batch 2 at $12 each.

Using a FIFO calculator or inventory management software can simplify this process.

Is a Perpetual Inventory System FIFO?

Yes, the FIFO method integrates seamlessly with a perpetual inventory system. In a perpetual system, inventory is updated in real-time as transactions occur. This enables businesses to monitor stock levels, costs, and movements without manual calculations. To go deeper, see our guide to perpetual inventory systems.

How Does Atomix Logistics Use the FIFO Method?

Modern 3PL companies like Atomix Logistics leverage FIFO to streamline their operations. Using their unique pod model, Atomix organizes inventory for clients in a way that ensures seamless order fulfillment while adhering to FIFO principles. You can see how our fulfillment process works from receiving to shipping. This is particularly advantageous for businesses looking for:

  • Fulfillment services for DTC (Direct-to-Consumer) brands.
  • Kickstarter fulfillment for backers.
  • B2B fulfillment with time-sensitive inventory.

The Atomix Logistics pod warehouse allows businesses to optimize inventory turnover while ensuring product quality.

Why Do 3PL Fulfillment Partners Rely on FIFO?

Choosing a reliable 3PL fulfillment partner is essential for businesses managing large inventories. Here's why FIFO is crucial for 3PL companies:

  • Efficiency: FIFO reduces storage times and enhances space utilization.
  • Accuracy: With tools like the FIFO formula and advanced inventory systems, 3PLs maintain transparency.
  • Cost-Effectiveness: It helps businesses manage costs effectively, including strategies to calculate dim weight for shipping optimization.

When looking for affordable 3PL solutions, consider providers like Atomix Logistics, known as one of the best 3PLs in Wisconsin for their innovative methods and adherence to FIFO practices. Curious about cost? Get your fulfillment pricing today.

What Are the Challenges of FIFO, and How Do You Overcome Them?

While the FIFO inventory method has numerous advantages, it also presents challenges, such as:

  • Storage Constraints: Maintaining FIFO may require more organized storage systems.
  • Human Errors: Mistakes in picking or tracking can disrupt the FIFO flow.
  • Implementation Costs: Small businesses may find it costly to switch to a FIFO-based system initially.

Solutions:

  • Invest in inventory software with a built-in FIFO calculator.
  • Train employees on how to use the FIFO method to restock food and other goods.
  • Work with experienced 3PL fulfillment companies to streamline processes.

Conclusion

In summary, what does FIFO mean? At its core, it's a method to ensure efficient stock rotation and inventory management. From understanding the definition of FIFO to learning how to calculate FIFO and how it compares to LIFO, this article has covered all the essentials.

The first in, first out (FIFO) method is a tried-and-tested strategy that minimizes waste, optimizes storage, and enhances customer satisfaction. Whether you're running a grocery store, a tech company, or an e-commerce brand, incorporating FIFO into your inventory practices can lead to significant operational improvements.

If you're looking for expert assistance, companies like Atomix Logistics and other 3PL fulfillment partners offer the expertise to implement FIFO effectively. With their help, businesses can thrive in competitive markets while maintaining top-notch inventory practices. Get your fulfillment pricing today!

FAQ: What Does FIFO Mean, and When Should It Be Used?

What does FIFO stand for, and what is its purpose?

FIFO stands for First In, First Out. It is an inventory management method where the oldest inventory items are sold, used, or shipped out first. The purpose of FIFO is to ensure proper stock rotation, minimize waste, and maintain the quality of products, especially perishable or time-sensitive goods.

What is the difference between FIFO and LIFO?

FIFO (First In, First Out) sells or uses the oldest inventory first, while LIFO (Last In, First Out) sells or uses the newest inventory first. When prices are rising, FIFO results in lower cost of goods sold and higher reported profit, whereas LIFO results in higher cost of goods sold and lower reported profit. FIFO is permitted under both GAAP and IFRS, while LIFO is allowed under US GAAP but not under IFRS.

When should the FIFO method be used?

The FIFO method is best used in industries dealing with perishable goods like food, beverages, or pharmaceuticals; time-sensitive items such as electronics or fashion products; and seasonal goods where demand fluctuates based on time. It is also commonly used in businesses aiming for compliance with accounting standards or to maintain accurate inventory records.

How do you calculate FIFO for inventory management?

To calculate FIFO, identify the cost of the oldest inventory batch first, multiply the quantity sold or used by the cost of the earliest batch until the sales quantity is fulfilled, and move to the next batch only after exhausting the previous batch. For example, if 100 units were bought at $10 and 50 units at $12, selling 150 units would cost $1,000 (100 units x $10) + $600 (50 units x $12) = $1,600.

How do you use the FIFO method to restock food?

Using FIFO for food requires organizing shelves so the oldest stock is at the front and new stock is placed behind, checking expiration dates regularly to ensure older items are sold or used first, and training staff to prioritize older inventory during restocking or order fulfillment.

What are the benefits of using the FIFO inventory method?

The FIFO inventory method reduces waste by using older stock first, improves customer satisfaction by ensuring fresh or high-quality products, enhances accuracy in inventory tracking, and helps businesses comply with financial and accounting standards.

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What Does FIFO Mean, and When Should It Be Used?

Hafez is the Marketing Manager at Atomix Logistics, where he creates blogs, guides, and other resources to help eCommerce brands streamline their logistics and scale their operations.

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