Using FIFO, LIFO, and Weighted Average Methods

How FIFO, LIFO, and Weighted Average Work in Inventory Control

Using FIFO, LIFO, and Weighted Average Methods helps businesses manage their stock and calculate the cost of goods sold accurately. These methods affect how inventory costs are recorded and how profit is reported. Understanding each method is important for controlling stock levels and making smart financial decisions.

FIFO (First-In, First-Out)

FIFO means the first items bought are the first ones sold or used. This method assumes older stock leaves the business first. For example, if you buy 10 items at R50 each and later buy 10 more at R60 each, FIFO says the first 10 items sold cost R50 each. FIFO works well with perishable goods or products that can expire.

Advantages of FIFO:

1. Matches the physical flow of most products
2. Stock value on hand is updated to recent prices
3. Better reflects current market value

LIFO (Last-In, First-Out)

LIFO assumes the last items bought are the first ones sold. Using the same example, if you sell 10 items, you use the cost of the new batch at R60 first. LIFO is less common in South Africa due to tax rules but can help in times of rising prices by showing higher costs and lower profits.

Advantages of LIFO:

1. Matches recent costs against current sales
2. Can reduce taxable income during inflation

Weighted Average Method

This method averages the cost of inventory by dividing the total cost of all items by the total number of items. It smooths out price fluctuations. For example, if you have 10 items at R50 and 10 at R60, the weighted average cost is (10×50 + 10×60) / 20 = R55 per item.

Advantages of Weighted Average:

1. Simplifies costing calculations
2. Provides a consistent cost during price changes
3. Easy to use for many types of inventory

Choosing the Right Method

• Use FIFO if you want to track old stock leaving first and keep inventory values current.
• Use LIFO to match recent costs to sales but be aware of legal and tax rules.
• Use Weighted Average to smooth costs when prices change frequently.

Knowing how to use FIFO, LIFO, and Weighted Average Methods helps you keep better control of stock costs and profits. Each method affects your business differently, so choose the one that fits your products and financial needs best.