What it means
Imagine running a business where the cost of buying or making your products steadily rises over time due to inflation. Under the LIFO method, the accounting system assumes that the latest items you purchased, which carry the highest price tags, are the ones you sold first.
By matching these higher expenses against your sales revenue, your reported profit appears lower. This is not just a bookkeeping exercise, as it directly impacts your tax bill.
In many regions, paying lower taxable income during periods of rising prices is the primary reason companies choose this approach. However, LIFO creates a distorted picture of what is actually sitting in your warehouse.
Because the newest items are expensed immediately, the inventory value remaining on your balance sheet is calculated using very old, outdated prices. This means your balance sheet might severely understate the true market value of your physical goods.
Furthermore, international accounting standards prohibit this method entirely, restricting its use mainly to countries that follow local rules, such as the United States. In everyday business operations, you do not actually have to sell your newest physical stock first.
You can still ship the oldest items sitting on your shelves to your customers to prevent spoilage or obsolescence. LIFO is strictly a financial tracking method for your accounting records, meaning your physical warehouse management can operate completely independently of your tax reporting choices.
Think of a stack of pancakes. As you cook fresh pancakes, you place them on top of the stack.
When you serve a customer, you take the pancake from the very top, which is the last one you made, leaving the older ones at the bottom untouched.
In practice
Real-world examples
Example 1
A trendy sneaker boutique buys 100 pairs at $50 each, then another 100 pairs as prices rise to $80. Using LIFO, when they sell 100 pairs, they expense them at $80, which is $8,000 of cost of goods sold. This reduces their immediate taxable profit compared with expensing the cheaper pairs at $5,000.
Example 2
A local hardware store purchases basic steel nails at $10 per box, followed by a later batch at $15 due to metal shortages. LIFO lets them record the cost of the $15 boxes first when calculating quarterly profit. The older $10 boxes stay in the inventory figure, so the balance sheet shows a lower stock value.
Example 3
An industrial manufacturer stocks raw aluminium. Early purchases cost $2,000 per tonne, but recent inflation pushed new stock to $3,500. LIFO allows them to assign the $3,500 cost to current production, so the product margins reflect what it would cost to replace the metal today.
Think of it
Think of a stack of pancakes. As you cook fresh pancakes, you place them on top of the stack. When you serve a customer, you take the pancake from the very top, which is the last one you made, leaving the older ones at the bottom untouched.
Formula
Calculation
Cost of Goods Sold (COGS) = Opening Inventory + Purchases - Closing Inventory (valued using the costs of the oldest purchases).
Example: opening stock of $1,000 plus recent purchases of $4,000 means $5,000 of goods are available. If closing stock is valued at the oldest rate of $1,200, the LIFO COGS is $5,000 - $1,200 = $3,800.
A layered example: a distributor opens with 50 units at $20 ($1,000) and buys 50 more units at $25 ($1,250), so $2,250 of goods are available. It sells 60 units. LIFO assigns the newest cost first: 50 units x $25 = $1,250, plus 10 units x $20 = $200, so COGS is $1,450. The 40 units left are valued at $20, giving closing inventory of $800, and $1,450 + $800 = $2,250. A first-in, first-out calculation would give COGS of $1,250, so LIFO records $200 more expense.Case study
Seen in the real world
This is a fictional, illustrative scenario. Oak Furniture Limited sells solid oak dining tables. At the start of the year, they had 10 tables in stock purchased at $400 each. Due to supply chain issues, they purchased 20 more tables later in the year at $600 each.
During the year, they successfully sold 20 tables to eager homeowners. Using the LIFO method, Oak Furniture Limited assumes that the 20 tables sold were the most recently acquired ones. Therefore, their cost of goods sold is calculated as 20 tables multiplied by $600, equalling $12,000. The remaining 10 tables on their balance sheet are valued at the older price of $400 each, totalling $4,000.
If they had used a method assuming older stock sold first, the cost of goods sold would have been 10 x $400 + 10 x $600 = $10,000. That is $2,000 lower, so taxable profit would have been $2,000 higher; at an illustrative 25% tax rate, that is $500 of extra tax. By applying LIFO, they matched higher recent costs against their current sales, reducing their taxable income for the year and preserving vital cash flow for future business investments.
Watch out
Common mistakes
- Assuming you must physically ship the newest items out of your warehouse first.
- Forgetting that balance sheet inventory values become outdated and do not reflect current market prices.
- Trying to use this method under international financial reporting standards where it is banned.
Questions
People also ask
Do I have to physically sell my newest inventory first if I use LIFO?
No. LIFO is purely an accounting and tax reporting method. Your physical warehouse operations can ship older stock first.
Why would any business choose to use LIFO?
During periods of inflation, it results in higher reported costs, which lowers taxable income and reduces tax payments.
Is LIFO accepted everywhere in the world?
No. It is disallowed under international accounting standards, though it is permitted under specific local rules in countries like the United States.