Inventory & Receivables Turnover: Measuring Operational Efficiency

Concepts

Inventory Turnover: How Quickly Does Inventory Sell?

The formula for inventory turnover:

Inventory Turnover = Cost of Goods Sold / Average Inventory

In plain terms, it tells you how many times a company sells through its entire inventory in a year. A higher turnover means products are selling faster and inventory management is healthier.

Converting to days makes it even more intuitive:

Days Inventory Outstanding = 365 / Inventory Turnover

If days inventory outstanding is 60, it means on average it takes two months from stocking a product to selling it.

Key points to watch with inventory turnover:

• Trends matter more than absolute numbers: If turnover days go from 45 to 90, it means products are getting harder to sell -- possibly due to declining demand or over-stocking.
• Compare within the same industry: Fast fashion turns over inventory much faster than luxury goods. That is an industry characteristic, not a quality judgment.
• Cross-check with revenue: If revenue is growing but inventory turnover is declining, the company may be over-stocking to chase sales.

Accounts Receivable Turnover: How Fast Do Customers Pay?

The formula for accounts receivable turnover:

Accounts Receivable Turnover = Revenue / Average Accounts Receivable

This measures how quickly a company collects payment from its customers. A higher turnover means cash is coming in faster.

Converting to days:

Days Sales Outstanding = 365 / Accounts Receivable Turnover

If days sales outstanding is 30, customers are paying within about one month on average.

When days sales outstanding increases, possible causes include:

• Customers' ability to pay is deteriorating
• The company is extending longer payment terms to boost sales (a red flag for revenue quality)
• An industry-wide downturn where everyone is delaying payments

Total Asset Turnover: Are Assets Being Used Efficiently?

The formula for total asset turnover:

Total Asset Turnover = Revenue / Average Total Assets

This measures how much revenue each dollar of assets generates. A turnover of 1.5 means every $1 of assets produces $1.50 in revenue.

The ratio varies significantly across business models:

• Asset-light companies (software, consulting): Typically have higher turnover because they need little physical infrastructure
• Asset-heavy companies (semiconductors, steel): Typically have lower turnover because they require massive plants and equipment

Total asset turnover is also one of the three components of the DuPont Analysis, directly influencing ROE.

Hands-On: Using CTSstock

1. Go to /analysis/2330 (using TSMC as an example)
2. Click the Financial Ratios tab at the top
3. Find the Operating Efficiency section
4. You will see inventory turnover, accounts receivable turnover, total asset turnover, and their corresponding turnover-in-days figures
5. What to look for:
   • Are turnover days trending shorter or longer?
   • Compared to industry peers, is efficiency leading or lagging?
   • If days inventory outstanding spikes suddenly, check whether revenue is also declining

FAQ

Q: Is a higher inventory turnover always better? A: In most cases, yes. But an extremely high turnover could mean the company is under-stocking and potentially missing orders. The ideal is a stable ratio that is in line with industry peers.

Q: Why do some companies not have an inventory turnover ratio? A: Service companies or software firms carry virtually no physical inventory, so this metric does not apply. In those cases, accounts receivable turnover and total asset turnover are more relevant.

Q: How do these turnover ratios relate to profitability? A: Directly. Higher turnover means the same asset base generates more revenue, which indirectly boosts ROE. This is exactly why the DuPont Analysis includes total asset turnover as one of the three drivers of ROE.