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What is Inventory Turnover


Inventory turnover is a measure of how fast a retailer sells through its inventory and needs to replace it. The faster you "turn" your inventory, the more inventory you will need in a year.


The formula is a simple one: 

Sales / Inventory 

For example, if your store sold $100,000 and had $50,000 worth of inventory, then your inventory turn would be 2 – meaning you turnover your inventory 2 times per year. 

Another way to calculate is with Cost of Goods Sold (COGS). In this formula: 

Cost of Goods Sold / Average Inventory 

And some POS systems measure turn as: 

Number of Units Sold / Average Number of Units (both during a specified period of time)  

Inventory turn is a very important calculation for retailers. While one might think that the higher the turn the better, the truth is too high of a turn may mean you are not stocking enough of the SKU. For example, if you have a 52 times turn on an item, then you are selling 4 to 5 per month. If it takes 3 weeks to replenish that stock, then you will have missed sales during that period since logically you are selling at an average of one per week. The point here is to raise your backstock and lower the turnover to make sure you do not miss any sales.  

On the other end, if you have a turn of 1 on an item and you have 12 of that item on hand in backstock, then you have way too many of that SKU. 

In this scenario, you have a 12 month supply. For most retailers, a turn of 2 to 4 is ideal. This is because it matches the replenishment of the item within the sales cycle. This means that you get the new one in before you need it. Remember, inventory in the back room is cash in jail. Having inventory does you no good until you sell it. 

Too many retailers make the mistake of being over inventoried. This is when they have way more inventory than what they need. A tell-tale sign of this condition is inventory turnover. If the turn for the store is 1, then you can safely assess that there is more inventory on hand than is needed.  

In retail, cash is king. You must manage the cash flow of your business. You do this by using an open-to-buy system with your inventory planning. With a good open-to-buy system you can plan the turns you want for an item by category and classification. In other words, there is no need to set the turns at the same level for every product in your store. Some will turn slower and some faster. But with an open-to-buy system in place, you can manage that easily.  

Another solid way to manage your inventory is with dating on your purchases. Dating is the amount of time you have to pay the vendor for the merchandise. Many retailers get strapped for cash because they bought inventory that has a low turn, but has to be paid for within 30 days. 

This means that you are paying the vendor before you have sold the items. Wal-Mart is the king of inventory turn. Their entire success has been linked to controlling inventory turns. In fact, many of their turns are greater that the dating terms on the invoice so, they are selling the merchandise BEFORE they have to pay for it - in some cases, up to 30 days before. 

Knowing your inventory turns will also help you when you go to market to buy your goods. It is the sanity check for how much to buy. 

Compiled in Editorial Board of Retailiran





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