Stock_Alpha_ai outlines FIFO impact on COGS
- Stock_Alpha_ai’s post turned a dry accounting choice into the real story: FIFO can make the same inventory look cheaper on the income statement. - In rising-cost periods, FIFO usually lowers reported COGS and lifts gross profit, while LIFO does the opposite and can reduce current taxes. - That matters more when inventory days blow out, because prettier margins can hide cash getting stuck on shelves.
Inventory accounting sounds like back-office plumbing. But it changes the numbers people actually trade on — COGS, gross margin, earnings, taxes, and working capital. That is why the recent posts from Stock_Alpha_ai, multibaggerwala, and MinSupply landed. They were all circling the same point from different angles: inventory is not just a stock count. It is a profit story, a cash story, and sometimes a trap. ### What is the accounting choice here? The core choice is how a company assigns costs to the inventory it sells. FIFO means first in, first out — the oldest costs move into COGS first. LIFO means last in, first out — the newest costs hit COGS first. In a period of rising input prices, FIFO usually pushes lower historical costs into COGS, which makes gross profit look better, while LIFO usually pushes higher recent costs into COGS and depresses profit now. ### Why does that change reported profit so much? Because COGS sits right under revenue. Move COGS a little and gross profit moves immediately. Under FIFO in inflation, ending inventory on the balance sheet also tends to look higher because the unsold units are valued closer to recent prices. Under LIFO, ending inventory can look older and cheaper. Same warehouse. Same physical goods. Different accounting layers. (ifrs.org) ### Why do taxes enter the picture? Higher accounting profit usually means higher taxable income unless the tax rules say otherwise. In the U.S., LIFO has long been attractive in inflation because it can raise COGS and lower current taxable income. But the catch is conformity — if a company adopts LIFO for tax, it generally has to use LIFO for book reporting too, and it needs IRS approval mechanics like Form 970. (cpajournal.com) ### Can every company just use LIFO? No — and this is a big comparability problem. IFRS does not permit LIFO. IAS 2 allows FIFO and weighted average, but not LIFO. So when you compare a U.S. GAAP company using LIFO with an IFRS reporter using FIFO, you are not just comparing operations. You are also comparing accounting regimes. That is one reason analysts pay attention to the LIFO reserve — the disclosed gap between LIFO inventory and a non-LIFO measure, often used to restate numbers for cleaner comparison. (irs.gov) ### Why did the inventory-days example hit so hard? Because it shifts the conversation from accounting optics to cash reality. Inventory days measures how long stock sits before sale. Cash conversion cycle adds receivables and subtracts payables to show how long cash is tied up in operations. If inventory days jump from 70 to 142 and CCC stretches from 7 to 111, the business may still print decent margins, but cash is getting trapped deeper in the system. (ifrs.org) That usually means more working capital strain and less room for error. ### So can rising profit be misleading? Absolutely. A company can show stronger gross margin under FIFO while inventory builds, demand softens, or stock ages badly. That is like grading a store on the sticker price of what left the shelf while ignoring how much cash is frozen in the back room. The income statement can look cleaner before the balance sheet starts yelling. (accountingportal.com) ### Where does reconciliation fit in? This is the operational side MinSupply was pointing at. Inventory reconciliation means matching physical counts to ERP or ledger records, investigating variances, and documenting adjustments. That matters for audit readiness, but also for basic trust in the financials. If counts are off, then COGS, shrink, reserves, and margin analysis can all be off too. (kpmg.com) ### What should investors actually watch? Start with the method — FIFO, LIFO, or weighted average. Then look at inventory growth versus sales growth, inventory days, the cash conversion cycle, and any LIFO reserve disclosure if the company uses LIFO. Basically, don’t stop at gross margin. The real question is whether profit is being earned through healthy sell-through — or borrowed from accounting layers while cash piles up in stock. (cleverence.com)
