Inventory Turnover: The Number That Tells You If Your Money Is Working

Imagine you have $50,000 in merchandise in your warehouse. If those products sell and are restocked 8 times a year, you generated $400,000 in sales with just a $50,000 investment. But if it only turns 2 times, you generated just $100,000 with that same investment 😬.

That's inventory turnover — and it's probably the most important metric you're not measuring.

What is inventory turnover?

It's the number of times your inventory completely renews itself in a period (usually a year). In simple terms:

How many times did I sell and restock my inventory in the year?

The classic (accounting) formula is:

Turnover = Cost of goods sold (12 months) ÷ Average inventory value

It's useful as an aggregate business indicator. But when you want to make decisions about what to buy, what to promote, or what to liquidate, you need to go down to the product level — and there the real question is in units:

How many times a year is this specific product moving?

Operational formula (by product):

Turnover = Units sold (period) ÷ Average stock (period) × annualization

Same idea, applied to the SKU. In your inventory system this is what you need to decide: "this product turns 8 times a year → I reorder every 45 days".

Example with real numbers 🔢

Let's say you have a distributor of batteries for electric motorcycles. You look at the X-500 battery model over the last 12 months:

• Opening stock: 20 units
• Current stock: 25 units
• Average stock: (20 + 25) / 2 = 22.5 units
• Units sold in the year: 90 units

Turnover = 90 ÷ 22.5 = 4.0 times per year

This means every 3 months (12 ÷ 4) you completely renew the stock of this product. Is that good? It depends.

And if you want to know the monetary impact, you multiply by the unit cost:

Average capital tied up = 22.5 × $1,200 = $27,000

That's why a good turnover report shows you both things: the speed of the product (units) and the money tied up (value). Speed tells you what to do, money tells you where to start.

What's a good turnover rate? 📊

It varies a lot by industry. Here are reference ranges:

A turnover of 4x in a distributor is in normal range. But if you could raise it to 6x, you'd free up capital:

At 4x → needs $75,000 in average inventory
At 6x → needs $50,000 in average inventory

Difference = $25,000 of free capital to invest elsewhere 🎯

Two indicators that go hand in hand: turnover and coverage

Coverage is the inverse: how many days does my current stock last?

Coverage (days) = Current stock ÷ (Units sold ÷ days in period)

Continuing with the X-500 battery:

90 units sold in 365 days = 0.25 units/day
Coverage = 25 ÷ 0.25 = 100 days of stock

You have stock for 100 days. If your supplier delivers in 2 weeks, 100 days is a lot — you have idle capital. But if you import and it takes 3 months to arrive, it's just right.

Why analyze by product, not by total?

The aggregate turnover of the business (the classic "my company turns 4x") hides problems. Two scenarios with the same 4x:

Company A — healthy:

• 50 products, all turning between 3x and 5x
• Even distribution, little trapped capital

Company B — in trouble:

• 50 products: 20 turn 10x (constantly out of stock), 30 turn 1x (capital trapped)
• Average: 4x, but broken operation

That's why serious turnover reports go down to the product level, not the aggregate number.

5 actions to improve your turnover 🚀

1. Identify stagnant products

Make a list of products that haven't sold in 90+ days. If they represent more than 15% of your inventory, you have a serious trapped-capital problem. More in this article.

2. Negotiate shorter delivery times

If your supplier delivers in 3 days instead of 15, you can keep less stock without risk of running out. Less coverage = more turnover.

3. Buy more frequently in smaller quantities

Instead of buying 500 units every 3 months, buy 170 every month. Your average investment drops even if the unit cost rises slightly.

4. Review prices and discounts

Sometimes a volume discount tempts you to buy too much. But if that stock takes 6 months to sell, the "savings" are lost in trapped capital. Do the math before accepting 🧮.

5. Analyze by category, not just in total

Your overall turnover might be 4x, but maybe your batteries turn 8x and your accessories 1.5x. The average hides the problems — you need to see each category and each product.

In Abakus you can see the turnover of each of your products with its classification (stagnant, slow, normal, fast) from the inventory turnover report. If you're not measuring turnover today, you probably have money trapped without knowing it.

Need help analyzing your inventory? Write to us — we'll help you find where your capital is 💪🏽.