Inventory Turnover: Category A Turns 12x/Year, Category B Turns 2x = Different Stocking
Retail store 1000 SKUs. Category A (popular items): turnover 12x/year, hold 1 month stock = SGD 50K. Category B (slow movers): turnover 2x/year, hold 6 months stock = SGD 100K. Working capital tied up: SGD 150K. If you reduce Category B to 3-month stock (turnover 4x/year instead of 2x), free SGD 50K. Opportunity: invest SGD 50K in Category A (higher velocity) = higher total profit.
- Why Inventory Turnover Matters
- Category Analysis Framework
- The Cost of Overstocking Slow Movers
- AskBiz Inventory Optimization
- The Turnover Formula and Why Average Inventory Matters
Why Inventory Turnover Matters#
Turnover = annual revenue ÷ average inventory. High turnover (12x/year) = stock fresh, obsolescence risk low, working capital efficient. Low turnover (2x/year) = stale inventory, obsolescence risk high, working capital blocked. Cost of blocked capital: 4% annual interest = SGD 2K per SGD 50K inventory sitting idle.
Category Analysis Framework#
(1) Group SKUs by category (apparel, electronics, home goods). (2) Calculate turnover per category (annual sales ÷ avg inventory). (3) Rank: high → low. (4) Set stock targets: fast movers (12x/year = 1-month stock), slow movers (4x/year = 3-month stock). (5) Review quarterly: rebalance stock per new turnover rates.
The Cost of Overstocking Slow Movers#
Slow mover category (2x/year turnover): SGD 100K inventory. Annual carrying cost: 4% interest + 2% insurance + 2% obsolescence = 8% × SGD 100K = SGD 8K/year. Revenue from slow movers: 2 × SGD 100K = SGD 200K (assuming full turnover). Profit margin: assume 25% = SGD 50K gross profit. Net profit: SGD 50K - SGD 8K = SGD 42K. Compare: fast movers SGD 50K inventory, 12x turnover = SGD 600K revenue, 25% margin = SGD 150K gross, minus 4% carrying cost SGD 2K = SGD 148K net. Fast movers 3.5x more profitable per dollar of inventory.
AskBiz Inventory Optimization#
Ranks categories by turnover. "Category A (apparel): 12x turnover, SGD 50K inventory. Category B (furniture): 2x turnover, SGD 100K inventory. Free up SGD 30K from Category B by reducing to 3-month stock. Reinvest in Category A (more profitable per dollar). Projected impact: +SGD 20K annual profit from better inventory allocation."
The Turnover Formula and Why Average Inventory Matters#
Turnover = annual cost of goods sold ÷ average inventory value (not ending inventory, which can be misleading if you just received a large shipment). Average inventory = (opening stock value + closing stock value) ÷ 2, or better, an average of monthly stock levels across the year if your sales are seasonal. Using COGS rather than revenue in the numerator avoids inflating turnover with margin differences between categories. A common error is calculating turnover once a year from year-end stock alone — a furniture retailer that stocked up heavily in November for a December push will show an artificially low turnover if measured on 31 December stock. Calculate turnover monthly and average it, or at minimum use a mid-point average, to get a number you can actually act on.
Worked Example: The SGD 20K Reallocation Decision#
A Singapore homeware retailer had Category A (kitchenware) turning 10x/year on SGD 60K average inventory, generating SGD 600K revenue at 30% margin = SGD 180K gross profit. Category B (large furniture) turned 1.8x/year on SGD 120K average inventory, generating SGD 216K revenue at 35% margin = SGD 75.6K gross profit. Profit per dollar of inventory: Category A = SGD 180K ÷ SGD 60K = 3.0. Category B = SGD 75.6K ÷ SGD 120K = 0.63. Even though Category B has a fatter margin per sale, it ties up capital nearly 5x less efficiently. Reducing Category B stock to 3-month cover (turnover 4x/year) would free roughly SGD 60K, which redeployed into Category A at the same 3.0 profit-per-dollar ratio projects an additional SGD 180K revenue capacity and roughly SGD 54K incremental gross profit — the basis for the SGD 20K+ net profit uplift most retailers see after rebalancing.
Common Mistakes When Acting on Turnover Data#
The biggest mistake is applying one turnover target across every category regardless of product type — furniture and fresh produce have fundamentally different economics and should never share a stock-cover target. The second is reacting to a single low month rather than a trend; turnover naturally dips in slow seasons, and cutting stock in response can cause a stockout when demand rebounds. The third is ignoring why a category turns slowly before cutting it — sometimes low turnover reflects a genuine long-tail product customers expect you to carry (spare parts, large-format items), and cutting it damages customer trust even though the inventory math looks bad in isolation. AskBiz tracks turnover trend by category over rolling 3, 6, and 12-month windows so a seasonal dip doesn't trigger a premature rebalancing decision.
People also ask
What turnover target should I set?
Retail: 8-12x/year (monthly stock). Grocery: 12-24x/year (weekly stock). Furniture: 3-4x/year (quarterly stock). Depends on product shelf life and demand predictability.
How do I phase out slow movers without waste?
(1) Discount 10-20% to clear (better than obsolescence loss). (2) Return to supplier if possible. (3) Donate (tax write-off). Avoid: keeping "just in case" = waste of capital.
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