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LIFO

LIFO, or Last-In, First-Out, is an inventory method where the newest purchases are assumed to be sold first. In Financial Accounting II, it changes cost of goods sold, ending inventory, and taxable income.

Last updated July 2026

What is LIFO?

LIFO in Financial Accounting II is an inventory costing method that assumes the most recently purchased items are the first ones sold. So when you calculate cost of goods sold, you use the latest costs first instead of the older ones sitting in inventory.

That simple ordering changes the financial statements. If prices are rising, the newest inventory usually costs more, so those higher costs move into COGS sooner. The result is usually higher COGS, lower gross profit, and lower taxable income than you would get under FIFO.

The ending inventory under LIFO is made up of older costs, not current replacement costs. That means the balance sheet can show inventory values that are lower than what the company would pay to replace those goods today. In inflationary periods, that difference can be noticeable.

LIFO shows up in accounting because it is a rule-based assumption, not because the business literally ships the newest item first every time. A company can sell units physically in any order and still apply LIFO for reporting as long as its inventory records support the method.

A quick example makes the pattern clearer. Say a store buys 10 units at $8, then 10 more at $10, and sells 10 units. Under LIFO, the 10 sold are costed at $10 each, so COGS is $100. Under FIFO, the same sale would use the $8 layer first, so COGS would be $80. That difference flows straight into profit and inventory valuation.

The method also matters when a company changes accounting principles. If a business switches from LIFO to another method like FIFO, it has to explain the change and show the effect on comparability across periods.

Why LIFO matters in Financial Accounting II

LIFO matters because it changes the numbers you use to judge performance, not just the inventory footnote. In Financial Accounting II, you often compare methods to see how a company’s reported profit, tax burden, and inventory balance shift when costs move up or down.

If prices are rising, LIFO can make earnings look lower than FIFO because the newest, higher costs are matched against current sales. That can create a tax advantage in the short run, since lower taxable income can mean less tax owed. But it also means the company may report weaker profit margins than a FIFO company selling the same products.

LIFO also matters for financial statement analysis. Analysts look at cost of goods sold, gross profit, and inventory turnover, and the inventory method can change all three. If you do not account for the method, you can misread trends or compare two companies unfairly.

This term also connects to accounting principle changes. When a company leaves LIFO, you have to think about disclosure, consistency, and how prior periods are presented so the statements stay comparable.

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How LIFO connects across the course

FIFO

FIFO is the main comparison point for LIFO. FIFO assumes the oldest costs are sold first, so in rising prices it usually shows lower COGS, higher ending inventory, and higher reported profit than LIFO. When you see a question about method changes or inflation effects, comparing LIFO to FIFO is usually the fastest way to explain the difference.

Cost of Goods Sold (COGS)

LIFO changes how COGS is measured, which is why the method affects gross profit and net income. With LIFO, the most recent costs move into COGS first, so COGS tends to rise faster when purchase prices rise. If you are tracing a transaction through the income statement, COGS is the place where the LIFO effect shows up first.

Inventory Valuation

LIFO is one inventory valuation method, meaning it is one rule for assigning a dollar value to inventory on the books. It does not describe how the goods physically move, it describes how accounting layers are removed for reporting. That is why the same warehouse can still use LIFO even if the actual shipping order is different.

comparative financial statements

Comparative financial statements matter when a company changes from LIFO to another inventory method. You need comparable period numbers to see trends clearly, so a method change often requires explanation and possibly recalculation of prior figures. This connection shows up when a problem asks how the statements should be presented after a change in accounting principle.

Is LIFO on the Financial Accounting II exam?

A quiz question on LIFO usually asks you to calculate COGS, ending inventory, or the effect on profit when purchase prices change. The move is to take the newest cost layers first and apply them to the units sold, then leave the older layers in ending inventory. If prices are rising, you should expect lower reported profit under LIFO than under FIFO, and often lower taxes too.

You may also see short-answer items about why a company would use LIFO or what happens when it switches methods. In those questions, mention the impact on comparability, disclosure, and the way inflation changes reported results. If the problem gives a purchase history and sales quantity, draw the layers before doing the math. That keeps you from mixing up physical flow with cost flow, which is the most common mistake.

LIFO vs FIFO

FIFO and LIFO are easy to mix up because both are inventory costing assumptions, but they move in opposite directions. FIFO uses the oldest costs first, while LIFO uses the newest costs first. In rising prices, FIFO usually leaves newer, higher-cost inventory on the balance sheet, while LIFO pushes those higher costs into COGS sooner.

Key things to remember about LIFO

  • LIFO means Last-In, First-Out, so the newest inventory costs are treated as sold first.

  • When prices rise, LIFO usually increases COGS and lowers reported profit compared with FIFO.

  • Ending inventory under LIFO often reflects older costs, not current replacement cost.

  • The method can reduce taxable income in inflationary periods, which is why companies may prefer it.

  • If a company changes away from LIFO, the change must be explained so financial statements stay comparable.

Frequently asked questions about LIFO

What is LIFO in Financial Accounting II?

LIFO is an inventory costing method where the most recent purchases are assumed to be sold first. In Financial Accounting II, that affects cost of goods sold, ending inventory, gross profit, and sometimes taxable income.

How does LIFO affect inventory valuation?

LIFO usually leaves older cost layers in ending inventory, so the balance sheet can show inventory at lower historical costs. If prices have been rising, that inventory value may be below current replacement cost.

Why can LIFO lower taxes?

When recent costs are higher, LIFO puts those higher costs into COGS sooner. That lowers reported income in inflationary periods, which can lower taxable income as well.

What is the difference between LIFO and FIFO?

LIFO uses the newest costs first, while FIFO uses the oldest costs first. The same sale can produce different COGS, profit, and ending inventory depending on which method a company uses.

LIFO in Financial Accounting II | Fiveable