📦methods
FIFO vs LIFO
FIFO vs LIFO
Two inventory costing methods with significantly different impacts on financial statements and taxes. FIFO (First-In, First-Out) assumes oldest inventory is sold first. LIFO (Last-In, First-Out) assumes newest inventory is sold first.
Comparison Table
| Feature | FIFO | LIFO |
|---|---|---|
| Cost Flow Assumption | Oldest costs to COGS first | Newest costs to COGS first |
| Ending Inventory | Recent costs (current value) | Old costs (may be outdated) |
| Rising Prices - COGS | Lower COGS | Higher COGS |
| Rising Prices - Net Income | Higher net income | Lower net income |
| Rising Prices - Taxes | Higher taxes | Lower taxes (cash flow benefit) |
| Balance Sheet | Better approximates current value | May significantly understate value |
| Income Statement | May not match current costs to revenue | Better matching of current costs |
| IFRS Compliance | Allowed under IFRS and GAAP | NOT allowed under IFRS, only GAAP |
Key Differences
- →Tax impact: LIFO provides tax savings in rising prices (major advantage)
- →Balance sheet: FIFO ending inventory is more relevant for current values
- →Income statement: LIFO COGS better reflects current costs
- →International: LIFO prohibited under IFRS, limiting global comparability
- →Physical flow: FIFO usually matches actual physical flow of goods
When to Use FIFO
- ✓Companies needing IFRS compliance
- ✓Industries with perishable goods (actual FIFO flow)
- ✓When current balance sheet values are important
- ✓Rising prices when higher reported income is desired
When to Use LIFO
- ✓US companies in rising price environments
- ✓When tax minimization is a priority
- ✓Better matching of current costs to current revenues
- ✓Industries where LIFO is standard practice
Common Confusions
- !Physical flow vs cost flow: LIFO accounting doesn't require physically selling newest items
- !LIFO liquidation: Selling into old, low-cost layers can spike income and taxes
- !Switching methods: Changing from LIFO to FIFO can have major tax consequences
- !Dollar-value LIFO: A more complex version that uses price indices
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Common questions about this comparison
Yes, but it requires IRS approval and may result in a large tax liability because the LIFO reserve (difference between FIFO and LIFO values) becomes taxable income.
If a US company uses LIFO for tax purposes, it must also use LIFO for financial reporting (with limited exceptions). This IRS rule prevents companies from getting LIFO tax benefits while reporting higher FIFO income.