ABC analysis explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
A trader with hundreds of items cannot count, reorder and guard each one with equal care. Selective control picks the few items that carry most of the money, the few that move slowly and the few that would stop the business if they ran out. This guide is for traders and accountants who want to focus stock effort where it pays.
ABC analysis ranks items by annual consumption value and splits them into A (few items, most of the value), B (middle) and C (many items, little value). FSN groups items by movement (fast, slow, non-moving) and VED by criticality (vital, essential, desirable). Inventory turnover = cost of goods sold ÷ average inventory, and days of stock = 365 ÷ turnover. Use the bands to decide how often to count, how tightly to reorder, and which slow stock to clear.
Not to be confused with activity based costing
"ABC" here means "Always Better Control", a stock-grading method. It has no connection with activity based costing, which is a way of tracing overheads to products. The two share only initials.
The data you need
For each item: annual quantity consumed or sold, unit cost, and the stock on hand at the start and end of the year. For FSN, the date of last movement. For VED, a judgement from the operations manager on what happens if the item is out of stock. A good place to begin an inventory management setup is exactly this grading, because it tells you which items deserve a reorder level and which can be bought on demand.
The method
ABC. Step 1: annual consumption value of each item = quantity × unit cost. Step 2: rank from highest to lowest. Step 3: add a running total and its percentage of the whole. Step 4: draw the lines, commonly near 70 to 80 per cent of value for A, the next 15 to 20 for B, the rest for C. The cut-offs are a matter of judgement; the pattern (few items, large value) is what matters.
FSN. Fast-moving items sell often, slow-moving rarely, non-moving not at all within a chosen period such as twelve months. Use it to find stock to clear or to stop buying.
VED. Vital items stop production or service if absent; essential items cause serious disruption; desirable items cause only inconvenience. A cheap vital spare can deserve more safety stock than an expensive desirable one.
Inventory turnover. Turnover = cost of goods sold ÷ average inventory, where average inventory = (opening + closing) ÷ 2. Days of stock = 365 ÷ turnover.
| Band | Share of items | Share of value | Typical control |
|---|---|---|---|
| A | Small | Large | Tight: frequent counts, small orders, close supplier follow-up |
| B | Medium | Medium | Moderate: periodic review |
| C | Large | Small | Light: bulk orders, two-bin system, yearly count |
Worked example: a hardware wholesaler
A wholesaler carries twenty items. Figures are annual cost of goods sold in ₹ lakh (assumed); total ₹1,000 lakh.
| Group | Items (value ₹ lakh) | Items | Group value | Cumulative value | Cumulative share |
|---|---|---|---|---|---|
| A | Cement 270, TMT bars 190, PVC pipes 120, paint 85, electrical cable 65 | 5 | 730 | 730 | 73 per cent |
| B | Tile adhesive 50, GI fittings 45, sanitaryware 35, door fittings 30, locks 20 | 5 | 180 | 910 | 91 per cent |
| C | Ten small lines: 15, 12, 11, 10, 9, 8, 8, 7, 5, 5 | 10 | 90 | 1,000 | the whole value |
Check the groups: A = 270 + 190 + 120 + 85 + 65 = 730. B = 50 + 45 + 35 + 30 + 20 = 180. C = 15 + 12 + 11 + 10 + 9 + 8 + 8 + 7 + 5 + 5 = 90. Total = 730 + 180 + 90 = 1,000.
So 25 per cent of the items (five of twenty) carry 73 per cent of the value, and the bottom half of the list carries 9 per cent.
Turnover. Opening stock ₹180 lakh, closing stock ₹220 lakh. Average inventory = (180 + 220) ÷ 2 = ₹200 lakh. Inventory turnover = 1,000 ÷ 200 = 5 times a year. Days of stock = 365 ÷ 5 = 73 days.
What the owner decides.
- Count A items monthly and review their reorder levels quarterly (see the EOQ and stock levels guide). Ask suppliers for smaller, more frequent deliveries of cement, where money and storage risk are highest.
- Put the C items on a two-bin system: when the first bin empties, reorder, and use the second bin meanwhile. Count them once a year.
- Overlay VED: if locks, a C-band item, are the one thing contractors will not buy elsewhere, treat them as vital and hold more.
- Run an FSN report on the B and C lines and clear anything unmoved for twelve months.
- At 73 days of stock, a push to 60 days takes out 13 days of cost of sales. Daily cost of sales = 1,000 ÷ 365 = about ₹2.74 lakh, so the release is about 2.74 × 13 = ₹35.6 lakh of cash.
Just-in-time buying and physical control
Just-in-time buying means ordering close to the day of need so little stock is held. It works when suppliers are reliable and close; a trader that depends on distant mills may prefer a modest buffer for A items. Physical control completes the picture: continuous stock-taking (counting a few items every day) and regular reconciliation of the count with the book. A tight control matters for lenders too, as the guide on CARO 2020 inventory verification and quarterly statements to banks explains.
Common mistakes
- Ranking by quantity or by unit price rather than by annual consumption value.
- Setting the bands once and never revisiting them; the ranking shifts with seasons and prices.
- Reading turnover without comparing it to similar traders, or with a year-end stock that is unusually low or high; use an average of more months where stock is seasonal.
- Treating a low turnover on A items as safe because "they are our fast sellers"; the money tied up is the issue.
Need help with grading your stock?
If stock is your largest asset and you cannot say which items matter, we can help you grade it, set counting cycles and bring days of stock down. Start with an inventory management setup tailored to your range.
Key takeaways
- ABC ranks by value, FSN by movement, VED by criticality; combine them rather than choosing one.
- A few items usually carry most of the value; control them closely.
- Turnover = cost of goods sold ÷ average inventory; days of stock = 365 ÷ turnover.
- Every day taken out of stock days releases about a day's cost of sales in cash.
- ABC stock grading is not activity based costing.
Read next
- Economic order quantity (EOQ) and stock levels
- Activity based costing: cost pools and cost drivers
- Ratio analysis for a small business
Disclaimer: The methods described are standard cost accounting and financial management techniques. The worked example uses an invented business and invented figures, including any tax, interest or exchange rate, which are assumptions for illustration and not current rates. Where the article refers to a legal requirement, the linked guide and the official text should be checked. This article is general information, not legal advice; check the official text before acting.