In inventory management, the way you value and move stock impacts profitability, taxes, and operational efficiency. First In, First Out (FIFO) is one of the most widely used methods for tracking inventory costs and managing product flow.
FIFO assumes that the oldest inventory — the items purchased or produced first — is sold or used first. This makes it especially useful for businesses dealing with perishable goods, seasonal products, or items with expiration dates. It also often results in higher reported profits in times of rising prices.
Understanding first in, first out (FIFO)
FIFO is both an inventory valuation method for accounting purposes and a stock rotation principle for operations. Under FIFO, the cost of the oldest inventory is assigned to the cost of goods sold (COGS), and newer inventory costs remain in stock on the balance sheet.
Operationally, FIFO means physically moving older items out of storage before newer ones, ensuring products are used or sold while still fresh and relevant.
For example, if a company buys 100 units at $5 each in January and another 100 units at $6 each in March, and then sells 120 units in April, FIFO records:
- First, 100 units from the January batch at $5 = $500
- Then, 20 units from the March batch at $6 = $120
Total COGS = $620. The remaining 80 units are valued at $6 each = $480.
Why businesses use FIFO in inventory management
The FIFO method offers several operational and financial advantages:
- Logical cost flow — Matches the way products are typically sold in real life, especially in industries where older stock needs to move first.
- Accurate inventory value — In times of inflation, FIFO leaves newer, higher-cost stock in inventory, increasing the reported value on the balance sheet.
- Lower risk of obsolescence — Selling older stock first reduces waste from expired or outdated products.
- Regulatory compliance — FIFO is accepted under both International Financial Reporting Standards (IFRS) and US Generally Accepted Accounting Principles (GAAP).
How FIFO works in accounting and operations
In accounting, FIFO determines COGS and ending inventory value for financial reporting and tax purposes. Because older inventory costs are usually lower during inflation, FIFO can lead to lower COGS and higher profits — which may mean higher tax liabilities.
In operations, FIFO is about stock rotation. Warehouses organize products so that the oldest batches are picked and shipped first. This often involves strategic shelving, labeling, and inventory management systems to ensure accurate rotation.
Benefits of using FIFO
Reduced waste and spoilage — By selling older products first, businesses minimize losses from expired goods.
Better cash flow predictability — FIFO produces consistent, transparent inventory valuations, making it easier to forecast cash needs.
Higher reported profits during inflation — Older, lower costs are matched against current sales prices, boosting reported income.
Simpler to implement — FIFO is straightforward to understand and apply, making it a good choice for many businesses.
Limitations of FIFO
Higher taxes in inflationary periods — Increased reported profits mean higher taxable income.
May not match actual cost flow in some industries — In certain manufacturing or bulk-goods sectors, newer stock might be sold first due to demand or production cycles.
Requires organized storage — Without proper stock rotation processes, physical operations may not align with the FIFO assumption in accounting.
FIFO vs. LIFO and other methods
- FIFO vs. LIFO — FIFO sells oldest stock first, leading to higher profits in inflation. LIFO sells newest stock first, often lowering taxable income in inflationary times.
- FIFO vs. Weighted Average Cost — Weighted Average smooths price changes by using the average cost of all units in inventory for valuation, while FIFO reflects actual purchase sequence.
Each method affects financial results differently, so businesses choose based on tax strategy, industry needs, and compliance rules.
FIFO in different industries
Retail — Essential for fast-moving consumer goods, especially with expiration dates.
Manufacturing — Ensures components are used before they become obsolete.
Food and beverage — Prevents spoilage and ensures freshness for customers.
Pharmaceuticals — Maintains compliance with strict product dating and quality control regulations.
Best practices for managing FIFO inventory
- Label products clearly with purchase or production dates.
- Use warehouse layouts that make older stock more accessible for picking.
- Implement inventory management software that supports batch tracking and FIFO rotation.
- Train staff to follow FIFO procedures consistently during receiving and picking.
Technology and FIFO inventory management
Modern inventory systems make FIFO easier to apply by:
- Tracking batch numbers and dates automatically.
- Generating picking lists that prioritize oldest stock.
- Providing real-time visibility into stock levels and movement history.
How Trebley supports FIFO inventory management
Trebley’s warehousing and inventory systems are designed to help businesses apply FIFO accurately. From clear batch tracking to organized storage layouts and real-time reporting, Trebley ensures that products move in the correct order operationally while your financial records reflect the right cost flows.
Conclusion
FIFO is one of the most practical and widely accepted inventory management methods. It aligns with the natural flow of goods, reduces waste, and supports accurate financial reporting. While it can increase taxable income in inflationary periods, its simplicity and compliance advantages make it the preferred choice for many businesses worldwide.
By combining disciplined stock rotation processes with reliable inventory systems, businesses can use FIFO to protect profitability and keep operations running smoothly.
FAQs
What is FIFO in inventory management?
FIFO stands for First In, First Out. It’s an accounting and stock rotation method where the oldest inventory is sold or used first.
Why is FIFO important?
It reduces waste, keeps inventory fresh, and is accepted under both IFRS and US GAAP.
Does FIFO reduce taxes?
Not usually — in inflation, FIFO often results in higher taxable income compared to LIFO.
Is FIFO only for perishable goods?
No. It’s useful for any product where older stock should be sold first, including seasonal or style-based goods.
What’s the difference between FIFO and LIFO?
FIFO sells oldest stock first; LIFO sells newest stock first, often for tax advantages in inflation.
