Analysis

Inventory ABC Analysis: The Complete Guide

Find the 20% of stock driving 80% of your inventory value. Everything you need to know - plus a free tool to do it instantly.

Open the ABC Analysis tool

What is abc analysis?

ABC analysis applies the Pareto principle (the 80/20 rule) to inventory: typically a small share of items (Class A) accounts for the large majority of usage value, while a large share of items (Class C) contributes very little. Accountdesq's Inventory ABC Analysis tool ranks every item by annual usage value (quantity used or sold multiplied by unit cost), classifies each into A, B, or C based on its cumulative contribution to total value, and generates the classic Pareto chart plus a class breakdown pie chart - along with specific inventory control and restocking recommendations for each class.

How it works

Enter each inventory item's name, annual quantity used or sold, and unit cost - or load sample data to see it in action. The tool calculates each item's usage value, ranks them from highest to lowest, and classifies items into Class A (the first ~80% of cumulative value), Class B (the next ~15%), and Class C (the remaining ~5%). A Pareto chart shows usage value bars alongside the cumulative percentage line, and a pie chart shows the value split by class. Export the full ranking, class summary, and recommendations as PDF or Excel.

Why it matters

Treating every SKU with the same level of attention wastes effort on low-value items while sometimes under-managing the few items that actually matter most. ABC analysis focuses tight inventory control - frequent review, accurate forecasting, careful reorder timing - on the small set of high-value items, while allowing loose, low-effort control (bulk ordering, infrequent review) for the large number of low-value items.

Common mistakes

Applying the same review frequency and safety stock policy to every item regardless of its value contribution
Classifying by quantity or unit price alone instead of usage value (quantity × cost), which is what actually matters for capital tied up
Never re-running the analysis - an item's class can shift over time as sales patterns and costs change
Ignoring Class C items completely - they still need SOME process, just a lighter one

Best practices

Re-run ABC analysis at least annually, or whenever your product mix changes significantly
Apply tighter safety stock and more frequent counts to Class A items specifically
Consider bulk, less-frequent ordering for Class C items to reduce administrative overhead
Use the Pareto chart in supplier and inventory review meetings - it communicates priority visually far better than a spreadsheet

Ready to put this into practice?

Use the free Inventory ABC Analysis to create a real abc analysis in under a minute - no signup, exports to PDF and Excel.

Open ABC Analysis tool