What is FIFO Inventory Method?
FIFO stands for "First-In, First-Out" and is one of the most common inventory valuation methods used in accounting. Under FIFO, the oldest inventory items (first in) are recorded as sold first (first out), regardless of the actual physical flow of goods.
This method is based on the assumption that the first goods purchased or produced are the first ones to be sold. While this may not always reflect the actual physical movement of inventory, it often matches the natural flow for many businesses, especially those dealing with perishable goods.
Key Concept
Under FIFO, your Cost of Goods Sold (COGS) reflects the cost of your oldest inventory, while your ending inventory reflects the cost of your most recent purchases.
How FIFO Works
When you sell items using FIFO:
- Start with your oldest inventory batch
- Deduct sold units from that batch at its purchase cost
- Once that batch is exhausted, move to the next oldest batch
- Continue until all sold units are accounted for
- Remaining inventory consists of your most recent purchases
FIFO Calculation Example
FIFO Formulas
Cost of Goods Sold (COGS)
Ending Inventory Value
Gross Profit
When to Use FIFO
FIFO is particularly suitable for:
- Perishable goods: Food, pharmaceuticals, and other items with expiration dates
- Fashion and seasonal items: Products that may become obsolete
- Technology products: Items that may quickly become outdated
- Rising price environments: When prices are increasing, FIFO results in lower COGS and higher reported profits
FIFO vs LIFO Comparison
LIFO (Last-In, First-Out) is the opposite of FIFO, where the most recent inventory is sold first.
| Aspect | FIFO | LIFO |
|---|---|---|
| Cost Flow | Oldest costs to COGS first | Newest costs to COGS first |
| During Inflation | Lower COGS, Higher Profit | Higher COGS, Lower Profit |
| Ending Inventory | Reflects recent prices (higher) | Reflects older prices (lower) |
| Tax Impact | Higher taxable income | Lower taxable income |
| Balance Sheet | More accurate current values | May understate inventory value |
| IFRS Compliance | Allowed | Not allowed |
Advantages of FIFO
- Matches physical flow: Often aligns with how businesses actually sell inventory
- More accurate balance sheet: Ending inventory reflects current market prices
- International acceptance: Permitted under both GAAP and IFRS
- Prevents obsolescence: Encourages selling older stock first
- Higher profits during inflation: Results in lower COGS when prices rise
- Simpler to understand: Intuitive concept for most businesses
Disadvantages of FIFO
- Higher taxes during inflation: Higher reported profits mean higher tax liability
- Income volatility: Profits can fluctuate significantly with price changes
- May not match cash flow: Reported profits may not align with actual cash position
- COGS may not reflect current costs: Older costs may not represent current market conditions
FIFO Impact on Financial Ratios
The inventory valuation method affects several important financial ratios:
Inventory Turnover Ratio
Current Ratio
Gross Profit Margin
FIFO in Perpetual vs Periodic Systems
Perpetual Inventory System
In a perpetual system, inventory records are updated continuously after each transaction. FIFO is applied at each sale:
- COGS calculated at time of each sale
- Real-time inventory tracking
- More accurate but requires more record-keeping
Periodic Inventory System
In a periodic system, inventory and COGS are calculated at the end of the period:
- Physical inventory count at period end
- COGS calculated: Beginning Inventory + Purchases - Ending Inventory
- Simpler but less precise
Important Note
For FIFO, both perpetual and periodic systems yield the same results for COGS and ending inventory. This is not true for LIFO, where the two systems can produce different results.
Frequently Asked Questions
Can I switch from FIFO to another method?
Yes, but accounting standards require consistency in inventory methods. Changes must be justified, disclosed in financial statements, and may require restating prior periods. Consult with an accountant before making changes.
Is FIFO or LIFO better for taxes?
During periods of rising prices, LIFO typically results in lower taxable income (and thus lower taxes) because it assigns higher recent costs to COGS. However, LIFO is not permitted under IFRS and may not reflect economic reality.
Does FIFO require physical tracking?
No, FIFO is an accounting cost flow assumption, not a requirement for physical inventory movement. You can use FIFO accounting even if your actual inventory isn't physically moved in that order.
How does FIFO affect cash flow?
FIFO itself doesn't affect actual cash flow. However, during inflation, FIFO reports higher profits which can lead to higher tax payments, thus reducing cash flow compared to LIFO.
Is FIFO required for any industries?
While not legally required in most cases, FIFO is strongly recommended or effectively required for perishable goods industries to prevent spoilage and ensure food safety compliance.