When I ask business owners which inventory valuation method they use, most say FIFO or weighted average — and then can't explain why they chose it. Their CA suggested it years ago. Fine. But do they know what it means for their books?
It matters more than most people realise. The same physical stock, valued using different methods, produces different profit figures. Different profit means different tax. Different asset values on the balance sheet. If you're planning to raise a loan or bring in an investor, the method you chose at setup will affect how your financials look.
What these methods actually do
FIFO — First In, First Out — assumes the oldest stock is sold first. When you record a sale, the cost assigned to it is from your earliest purchase batch.
In an environment where prices are rising (which describes most commodity markets in India), FIFO gives you lower cost of goods sold because you're using older, cheaper stock costs first. That means higher reported profit. Your remaining inventory is also valued at newer, higher prices — so your balance sheet looks stronger.
Weighted Average recalculates the average cost of all units on hand every time you receive new stock. Every sale is then costed at that running average, regardless of which physical batch you actually shipped.
This smooths out price swings. If raw material costs jumped 30% last quarter, weighted average absorbs that gradually instead of creating a sharp spike in your margins. Most businesses in India use weighted average precisely for this reason — it makes profitability more predictable month to month.
The one thing you absolutely need to know before choosing
LIFO (Last In, First Out) is used in some other countries and shows up in a lot of international business content. You cannot use LIFO in India. It's not permitted under Ind AS or ICAI guidelines. If you see someone recommending it, they're writing for a different market.
So which one should you pick?
If you're a trader dealing in perishables, fresh produce, or anything where you physically sell older stock first, FIFO reflects what's actually happening in your warehouse. Your books match reality.
If you deal in bulk commodities, manufactured goods, or anything where batches get mixed and you can't meaningfully distinguish "old stock" from "new stock," weighted average is more practical and produces more stable margins.
If you're about to raise bank finance and want to show the strongest possible balance sheet during an inflationary period, FIFO shows higher inventory values. This isn't gaming the system — it's understanding how the method works.
One thing you can't do: switch whenever it suits you
Once you choose a method and apply it consistently, switching requires disclosures and a restatement of prior periods. It's not impossible, but it's disruptive and creates questions from auditors.
Choose deliberately, at the start. If you're setting up a new business or migrating to proper accounting software, this is the moment to think it through with your CA — not three years later when changing is expensive.
The good news: any decent accounting software handles the valuation calculation automatically once you configure it. You just pick the method and it applies it consistently across every transaction. The hard part is making the right choice upfront.
