Understanding Inventory Turns

 

Inventory Turnover Explained: The Number That Can Make or Break a Business

What if one number could tell you whether a business is making efficient use of its money—or tying up hundreds of thousands of dollars in inventory that isn't generating enough profit?

If you're buying, selling, or managing a business that carries a significant amount of inventory, there's one financial metric I want you to understand.

Inventory turnover.

It's a simple calculation, but it can reveal major problems with profitability, working capital, and even the value of a business.

I recently worked on a business valuation project where the company had approximately $400,000 invested in inventory. Yet when I calculated the value of the business based on its cash flow, the business was worth less than the inventory sitting on its shelves.

How does something like that happen?

The answer has a lot to do with how frequently inventory is sold, replaced, and converted into gross profit.

Let's examine what inventory turnover means, how to calculate it, and why it can be one of the most important numbers in an inventory-intensive business.

What Is Inventory Turnover?

Inventory turnover measures how frequently a business sells and replenishes its inventory during a particular period.

It's especially important for businesses that carry substantial inventory relative to their annual sales.

Think about a typical auto repair shop.

The shop might generate more than $1 million in annual revenue while carrying only $10,000 to $15,000 worth of inventory.

Most replacement parts are ordered when customers need them.

The shop may stock batteries, wiper blades, light bulbs, and commonly used supplies, but inventory isn't necessarily a major investment relative to sales.

Now compare that with a retailer carrying hundreds of thousands of dollars in merchandise.

That retailer has a substantial amount of money tied up in products that must be sold before the investment can generate a return.

As I explain:

"The frequency at which you are selling stuff in relation to the size of the inventory that you have starts to become a critical metric in managing these businesses." —David C. Barnett

That's why inventory turnover matters.

It helps reveal how efficiently a business converts money invested in inventory into sales and gross profit.

How to Calculate Inventory Turnover

The conventional inventory turnover formula is:

Inventory Turnover = Cost of Goods Sold ÷ Average Inventory

For this calculation, the numerator and denominator need to be measured on a consistent cost basis.

There's an important distinction here.

Depending on the industry, reported cost of goods sold may include direct labor, selling fees, or other expenses.

When evaluating merchandise turnover specifically, I want to focus on the cost of the inventory that was sold.

This produces a more meaningful comparison with the value of inventory being held.

Example: Selling a $10 Pen

Let's imagine you own a store that sells pens.

Each pen costs you $7.

You sell it for $10.

That gives you $3 in gross profit before paying your overhead expenses.

Now imagine you sell only one pen during the entire year.

Your figures would look like this:

Metric	Amount
Inventory investment	$7
Annual sales	$10
Cost of inventory sold	$7
Gross profit	$3
Inventory turnover	1 time

Your inventory turned over once during the year.

From an investment perspective, earning $3 on a $7 investment might initially sound attractive.

But there's a problem.

You still have to pay rent, insurance, utilities, employees, and other operating expenses.

And those costs have to be covered by the $3 in gross profit.

A business can't survive simply because an individual product has a good markup.

It needs enough sales activity to generate sufficient total gross profit.

What Happens When Inventory Turns Over Ten Times?

Now imagine you sell and replenish that same pen ten times during the year.

You still keep approximately $7 invested in inventory at any given time.

But you sell ten pens instead of one.

Metric	1 inventory turn	10 inventory turns
Average inventory	$7	$7
Annual sales	$10	$100
Cost of inventory sold	$7	$70
Annual gross profit	$3	$30
Inventory turnover	1×	10×

The inventory investment hasn't increased.

But the annual gross profit has increased from $3 to $30.

That additional gross profit gives the business substantially more money to cover its overhead.

This is the fundamental reason inventory turnover is so important.

A business can generate more gross profit from the same amount of invested capital by selling and replenishing inventory more frequently.

As I explained in the video:

"The $30 obviously is much more valuable in its ability to help us cover those overhead costs." —David C. Barnett

The objective isn't simply to have inventory.

It's to make that inventory productive.

Inventory Turnover Based on Cost vs. Sales

You may encounter different versions of inventory turnover calculations.

The conventional formula uses cost of goods sold divided by average inventory.

But some businesses also examine sales revenue relative to inventory investment.

These two approaches answer slightly different questions.

A cost-based calculation measures how often inventory is sold and replaced.

A sales-based calculation measures how much revenue is generated relative to the inventory investment.

It's important not to confuse the two or compare results calculated using different methods.

Example: A Women's Clothing Store

I once spoke with a women's clothing store owner who explained how she managed seasonal dresses.

At the beginning of a season, she would purchase a particular style in several sizes.

The most popular sizes would be ordered in larger quantities.

When the dresses first arrived, the store might promote them or display them prominently.

Some would sell at regular prices.

As the season progressed, the remaining dresses might be discounted.

Eventually, the last few could end up on a clearance rack.

The important point is that not every dress would sell at the original intended markup.

Some would generate less gross profit because of promotions and markdowns.

That's why looking at sales revenue relative to inventory investment can provide another useful perspective.

It helps show how much revenue the business generates from the money tied up in merchandise.

However, when comparing inventory turnover with industry benchmarks, make sure you're using the same calculation method.

Why Inventory Turnover Matters for Cash Flow

Inventory is money that has been converted into products.

Until those products are sold, that money remains tied up in the business.

If inventory sits on shelves for months or years, it may contribute very little to operating cash flow.

Meanwhile, the business still has expenses.

Rent must be paid.

Employees must be compensated.

Insurance, utilities, and other overhead costs continue.

The more inventory a business needs to maintain, the more working capital may be required to support its operations.

Cash Flow Efficiency

One of the primary benefits of improving inventory turnover is making better use of the capital already invested.

Suppose a retailer can generate the same annual sales while reducing average inventory from $200,000 to $150,000.

That means the business may be able to operate with $50,000 less tied up in merchandise.

If the reduction can be sustained without harming sales, the business may free up cash for other purposes.

It could use that money to reduce debt, fund improvements, or provide a return to the owner.

This is why inventory turnover isn't merely an accounting statistic.

It's a working capital management tool.

The $400,000 Inventory Problem: When Inventory Is Worth More Than the Business

Here's a real example from a business valuation project I worked on.

The business had approximately $400,000 invested in inventory.

Its annual sales were less than $800,000.

Even when looking at sales revenue relative to inventory, the business was generating less than two dollars of annual sales for every dollar invested in inventory.

That was a serious warning sign.

After accounting for the company's overhead expenses, the remaining cash flow was relatively low.

When I valued the business based on its earnings, the indicated business value was less than $400,000.

In other words, the value of the operating business was lower than the amount of money tied up in inventory.

As I explained:

"Literally $400,000 had been tied up in inventory to create a cashflow worth less than $400,000." —David C. Barnett

That's a difficult situation for a business owner.

What Is Negative Goodwill?

Goodwill generally reflects the value of a business beyond its identifiable net assets.

A profitable company with strong customer relationships, established systems, and sustainable earnings may command a price above the value of its individual assets.

But sometimes the opposite happens.

A business may have substantial assets while producing insufficient earnings to justify their value as part of an operating company.

In that situation, a buyer may be unwilling to pay the full asset value to acquire the business as a going concern.

The owner may discover that selling inventory and other assets separately could produce a better result than selling the entire business.

That's the kind of problem I describe when discussing dead capital or zombie capital businesses.

Capital is invested in assets, but those assets aren't generating enough cash flow to justify the investment.

How Much Would Sales Need to Increase?

In this particular valuation project, we considered what would need to happen for the business to generate enough earnings to support a value above its inventory investment.

Our analysis suggested annual sales might need to exceed $2 million.

That would represent a substantial increase from less than $800,000.

Using sales relative to the $400,000 inventory investment, the business would need to move from fewer than two sales-based turns to more than five.

That was a major operational challenge.

And the company had other capital assets to consider as well.

The example illustrates why inventory turnover can have such an important effect on business valuation.

A business might own a lot of merchandise, but that doesn't necessarily mean it has created a valuable operating company.

How Excess Inventory Increases Operating Costs

Inventory doesn't just require money to purchase.

It often creates additional expenses.

1. Storage and Warehouse Costs

Businesses with substantial inventory may need larger warehouses, additional shelving, or more retail space.

Those facilities cost money.

In the $400,000 inventory example, the company was paying for warehouse space to store its merchandise.

If it could operate with substantially less inventory, it might reduce its space requirements and related overhead.

That could improve profitability.

2. Obsolescence

Some products lose value as they age.

Consumer electronics are a good example.

A computer or electronic device may be replaced by a newer model before the retailer sells its existing stock.

The older product may then require a discount.

The longer inventory remains unsold, the greater the risk that it becomes outdated.

3. Shrinkage and Inventory Loss

Inventory can also become damaged, expire, disappear, or become unsellable.

Remember our $7 pen?

If the pen becomes worthless before it sells, the business may need to recognize the loss of that inventory investment.

Instead of generating $3 in gross profit, the company loses the value of the product.

Those losses reduce profitability.

4. Reduced Capital Efficiency

Perhaps the biggest cost is the opportunity cost.

Money tied up in slow-moving merchandise can't easily be used elsewhere.

It might otherwise support marketing, equipment upgrades, debt reduction, or business growth.

That's why inventory management is ultimately about much more than keeping shelves stocked.

Just-in-Time Inventory: How Businesses Reduce Capital Requirements

One way businesses improve inventory turnover is by reducing how much stock they hold.

This is the idea behind just-in-time inventory management.

Instead of purchasing large quantities of products far in advance, businesses arrange for inventory to arrive closer to the time it will be used or sold.

The Automotive Manufacturing Example

In the early days of automobile manufacturing, companies often kept substantial supplies of parts on hand.

That reduced the risk of production interruptions.

But it also required a large investment in inventory.

Modern automobile manufacturers often use tightly coordinated supply chains.

Parts arrive close to when they're needed in production.

This reduces the amount of capital tied up in stock.

But it also creates vulnerabilities.

If transportation is interrupted or a supplier fails to deliver, production can be disrupted.

The Grocery Store Example

When I was growing up, grocery stores often had substantial stockrooms.

If something was missing from a shelf, an employee might retrieve another case from the back.

Today, many grocery chains rely on distribution systems that continuously replenish stores based on sales activity.

Products move through distribution centers and are delivered according to what stores need.

This reduces inventory requirements.

But storms, transportation disruptions, or supply chain problems can quickly leave shelves empty.

The lesson is that reducing inventory can improve capital efficiency, but businesses still need enough stock to maintain reliable operations.

How to Know Whether Your Inventory Turnover Is Good

A question I frequently encounter is:

What is a good inventory turnover ratio?

The answer depends heavily on the industry.

A grocery store has very different inventory requirements from a furniture retailer.

A hardware store may need to stock specialized products that sell infrequently.

An electronics retailer may need to move products quickly before they become obsolete.

Inventory Turnover Benchmarks by Industry

During my research for this discussion, I encountered examples suggesting that furniture stores may operate with inventory turnover of approximately three to four times annually.

Grocery stores may target much higher turnover, potentially around 20 times annually.

These are illustrative figures, not universal standards.

Actual benchmarks vary according to the type of merchandise, accounting method, business model, and market.

The most useful comparison is with similar businesses in the same industry.

Why Franchise Systems Can Have an Advantage

Franchise networks often have access to operating data from multiple locations.

That information can help franchisees understand whether their inventory performance is reasonable.

I know a young woman who operates an inventory-intensive retail franchise.

She explained that one of the most valuable services her franchisor provides is inventory management support.

The company tracks individual products using stock-keeping units, or SKUs.

It performs regular inventory counts to help maintain accurate records.

And every month, the franchisor provides reports identifying products that are beginning to move too slowly.

The store can then adjust its displays and promotions before those products become seriously outdated.

That's a significant advantage.

Why SKU-Level Inventory Tracking Matters

A SKU is a stock-keeping unit.

It identifies a particular product or product variation within an inventory management system.

For example, different sizes or colors of the same clothing item may have separate SKUs.

Tracking individual SKUs helps a retailer identify which products are selling quickly and which are sitting on shelves.

Moving Slow Inventory Before It Becomes Dead Stock

In the franchise example, a product that hasn't sold for several months might be moved from the back of the store to a more visible display.

The store may feature it in a promotion.

If necessary, the product might be discounted.

The objective is to sell the merchandise before it becomes outdated or worthless.

Independent businesses can use similar methods.

Even a simple process of regularly reviewing shelves, counting inventory, and identifying aging products can make a difference.

But as the number of SKUs increases, software and reporting systems become increasingly valuable.

Five Ways to Improve Inventory Turnover

If you own a business with substantial inventory, here are five strategies worth considering.

1. Improve Demand Forecasting

Study historical sales patterns.

Identify seasonal trends.

Understand which products customers purchase most frequently.

Better forecasting can help you order merchandise in quantities that reflect actual demand.

2. Use Just-in-Time Inventory Where Appropriate

Reduce unnecessary stock by coordinating purchases more closely with expected sales.

But remember that lower inventory can increase the risk of stockouts.

You need to balance capital efficiency with supply reliability.

3. Optimize Your Product Mix

Not every product needs to sell at the same speed.

Some products may generate high margins but sell infrequently.

Others may have lower margins but turn over quickly.

The goal is to create a product mix that supports both customer needs and overall profitability.

Think about a hardware store.

It may keep an unusual plumbing fixture in stock for months.

That item doesn't sell frequently.

But having it available could help the store win a customer's entire purchase.

Sometimes carrying a slow-moving product makes sense because of its role in the overall business.

4. Discount Aging Inventory

When merchandise begins to move too slowly, consider promotions or markdowns.

Selling a product at a reduced margin may be preferable to keeping it indefinitely.

The important thing is to make deliberate decisions rather than allowing old inventory to accumulate unnoticed.

5. Invest in Inventory Management Software

Inventory software can help track sales, purchases, product age, and stock levels.

It can identify slow-moving SKUs and support more accurate purchasing decisions.

For businesses with hundreds or thousands of different products, this information can be extremely valuable.

Can Inventory Turnover Be Too High?

Yes.

Although higher turnover often indicates more efficient use of inventory, an excessively high ratio can create problems.

A business may be carrying too little stock.

Customers may arrive looking for products that aren't available.

Employees may spend excessive time placing emergency orders.

And the business may lose sales because it can't meet demand.

This is particularly important in industries where customers expect immediate product availability.

The goal isn't to eliminate inventory.

It's to maintain the right amount of inventory to support profitable sales.

Why Accurate Inventory Records Are Essential

There's another issue that can make inventory turnover calculations misleading.

Bad information.

If your inventory records are inaccurate, your turnover calculation won't be reliable.

The same problem occurs if your cost of goods sold is incorrect.

For example, if purchases are recorded in the wrong accounting period, the calculation may produce distorted results.

If physical inventory counts don't match the accounting records, you may not know how much merchandise you actually own.

As I explained:

"In order to actually apply some kind of methodology to the management of a business, you need to have reliable inputs." —David C. Barnett

Before relying on inventory turnover, make sure your inventory records and accounting practices are dependable.

Otherwise, you're making management decisions using numbers that may not reflect reality.

How Inventory Turnover Affects Business Valuation

When evaluating a business, I want to understand how much capital is required to produce its earnings.

Two companies may generate similar annual cash flow but require very different amounts of inventory.

The business that generates the same earnings with less capital tied up in merchandise may offer a more attractive economic model.

This is especially important when calculating the value of a company based on its earnings.

Inventory Turnover and Seller's Discretionary Earnings

Seller's discretionary earnings, or SDE, is commonly used when evaluating smaller owner-operated businesses.

It represents a measure of the financial benefit available to one working owner under specified normalization assumptions.

If a business carries excessive inventory, it may incur unnecessary storage costs, inventory losses, and other expenses.

Those costs can reduce its earnings.

Lower sustainable earnings can result in a lower business valuation.

This is why inventory turnover can influence both operating performance and what a buyer may be willing to pay.

How Improving Inventory Turnover Can Free Up Cash

Here's an important concept.

Suppose a business can maintain its sales while reducing the amount of inventory it needs to hold.

As existing merchandise is sold, the business purchases less replacement inventory.

That can release cash previously tied up in stock.

If the business maintains the same earnings while requiring less working capital, its operating economics may become more attractive.

As I explained:

"You literally will be able to take money out of that business because you will sell down the inventory and then you won't use that money to replace the inventory." —David C. Barnett

Of course, the business still needs sufficient working capital to operate.

But the principle is important.

Improving inventory management can potentially free up money without requiring the company to increase sales.

Why Business Owners Should Think Like Investors

One of the challenges in small businesses is that the owner, manager, and investor are often the same person.

The owner becomes busy managing employees, serving customers, and solving daily problems.

They may not regularly evaluate whether the capital invested in the business is producing an attractive return.

But I believe owners should periodically examine their companies from an investor's perspective.

Ask yourself:

• How much money is tied up in inventory?

• How many times does that inventory turn over annually?

• Is turnover improving or declining?

• Are storage and inventory losses reducing profitability?

• Could the same sales be generated with less inventory?

• Is the business producing enough cash flow to justify the capital invested?

These questions can reveal opportunities that aren't obvious when you're focused exclusively on daily operations.

Final Thoughts: Inventory Turnover Is More Than Just a Financial Ratio

Inventory turnover may look like a simple calculation.

But it can tell you a great deal about how a business operates.

It reveals whether inventory is moving efficiently.

It helps identify excess working capital requirements.

It can expose slow-moving merchandise, unnecessary storage costs, and potential obsolescence.

And in some situations, it can help explain why a business with substantial assets has surprisingly little economic value.

As I emphasized:

"The ultimate goal of everyone in business should be to make the most profit possible with the least amount of investment." —David C. Barnett

If you own or are considering buying an inventory-intensive business, I encourage you to calculate its inventory turnover.

Look at the results over multiple periods.

Compare them with appropriate industry benchmarks.

And investigate whether the company can generate the same or greater gross profit with less money tied up in inventory.

Because improving how efficiently a business uses its capital can be just as important as increasing sales.

Learn More About Buying, Selling, and Valuing Small Businesses

If you're considering buying an existing business, my Business Buyer Advantage programs can help you understand financial statements, business valuation, due diligence, financing, and acquisition risk.

Explore my online training, group coaching, and consulting services.

Explore Business Buyer Advantage