Inventory management KPI refers to measurable indicators businesses use to evaluate how effectively they manage, store, move, and sell inventory. These metrics turn inventory data into actionable insights to help understand business performance.
For Philippine businesses with multiple warehouses, tracking inventory KPIs replaces error-prone manual tasks to quickly spot slow-moving stock and record discrepancies. Learn how to optimize your warehouse management KPIs efficiently below.
Key Takeaways
KPI stands for Key Performance Indicator, in inventory management, a KPI is a measurable value that shows how well a particular inventory-related activity is performing against a business objective.
The right KPIs depend on the company’s industry, size, sales model, and operational goals. A grocery retailer in Metro Manila may prioritize stockout rate and sell-through, while a manufacturing company in Laguna may focus more heavily on inventory accuracy.
Choosing and monitoring the right inventory KPIs can help businesses make better decisions instead of simply reacting to inventory problems. Below here are some benefits of proper KPIs for inventory management which include:
KPI tracking isn’t just routine, it is a must. A research in the journal Ani: Letran Calamba Research Report Calamba found that poor forecasting could result in excessive inventory and products remaining that damaged the products. This shows why tracking the right KPIs from the start matters just as much as choosing them.
There are various types of inventory KPIs, and they may be divided into various categories depending on what they measure. There are financial, receiving, customer satisfaction, operational, and labour inventory KPIs. These are easier to group together for businesses to select the metrics that are relevant to their objectives, categories include:
Those are some crucial inventory management KPIs for businesses to assess performance in these areas. Each category of KPI is discussed in the following section, enabling you to understand and apply it successfully to improve warehouse performance.
By measuring financial inventory KPIs, businesses can gain insight into the impact of inventory on revenue, costs, profitability, and working capital. Here are some of the Key Performance Indicators (KPIs) to measure financial in inventory management:
The inventory turnover ratio is the number of times that a business turns over its average inventory over a given time period. The greater the ratio, the faster goods flow through the inventory. But, a very high ratio may mean that the amount of stock is too low:
Inventory Turnover = Cost of Goods Sold / Average Inventory
Days on Hand (DSI) is an estimation of the number of days that the inventory on hand will cover the current sales rate. If the DSI is lower it is likely that sales are occurring at a higher rate without necessarily affecting the industry’s goals. The formula of DSI is:
DSI = (Average Inventory / COGS) × Number of Days
This inventory management KPI is when the number of weeks that the stock’s value is expected to last before it is used up. For Philippine retailers and distributors that run on inventory based on weekly sales, this KPI may be helpful. The formula is made up of:
Weeks on Hand = Inventory on Hand / Average Weekly Demand
Additionally, the Stock to Sales Ratio is the number of stocks on hand or their value compared to the sales value or number for a specific time. This indicator can be used to determine if a business has too much or too little inventory based on sales. Here’s the formula:
Stock to Sales Ratio = Inventory / Sales
Sell-in Rate is the volume of merchandise sold by a manufacturer or distributor to a retailer or other business customer over a given time period. It can give suppliers an idea about the speed at which products are making their way to downstream sales.
Sell-in Rate = Units Sold to Retailers or Distributors / Total Units Available × 100
Sell-out measures how quickly products are sold to the end customer. A sell-through rate is often cited as a percentage of the available stock that is sold. This KPI is especially helpful for those who deal in products, such as retail, that experience rapid fluctuations in demand.
Sell-Through Rate = Units Sold / Units Available × 100
In addition, the direct cost that is incurred on products sold in a specific time period is called COGS. Inventory management KPI of COGS helps businesses to understand how much inventory cost is being turned into sales. Below here are the formula:
COGS = Beginning Inventory + Purchases – Ending Inventory
Cost per Unit is to measure the average cost of producing or buying an inventory unit. By keeping an eye on this metric, businesses can track supplier prices, production costs, freight costs, or any other costs associated with inventory. Which the formula is:
Cost per Unit = Total Inventory Cost / Number of Units
Revenue per Unit is the amount of revenue that is collected for each unit sold. Businesses can use this metric to better determine the profitability of each unit when comparing it with Cost per Unit. The formula for Revenue Per Unit is given as:
Revenue per Unit = Total Revenue / Units Sold
Gross Margin per Unit is the profit or margin per sale after the cost of the product. This aids businesses to understand which products would be more profitable. The formula consist of:
Gross Margin per Unit = Selling Price per Unit – Cost per Unit
Another KPI that is commonly used is ROI or Return on Investment. This KPI is the ratio of return earned to the investment amount. ROI is a useful metric for inventory because it can be used to determine if the company is getting a good return on its investment in inventory.
ROI = (Return – Investment Cost) / Investment Cost × 100
GMROI is an indicator that shows the gross margin a company makes per peso of inventory invested. The higher the GMROI, the more profitable the stock is. The formula is:
GMROI = Gross Margin / Average Inventory Cost
Receiving is one of the first points where inventory enters a warehouse. Delays or errors during receiving can affect stock availability throughout the rest of the operation. Here are some of the KPIs in receiving inventory process:
Time to Receive measures how long it takes to receive and process incoming inventory after it arrives at the warehouse. A shorter receiving time can help inventory become available for sale or production sooner. Here is the formula used for this KPI:
Time to Receive = Receiving Completion Time – Inventory Arrival Time
Putaway Time measures how long it takes to move received inventory from the receiving area to its assigned storage location. Long putaway times can create warehouse congestion and delay inventory availability. The formula of Putaway Time:
Putaway Time = Putaway Completion Time – Receiving Completion Time
Supplier Quality Index evaluates the quality and consistency of inventory received from suppliers. Businesses can consider factors such as defective units, damaged products, rejected shipments, and quality-related returns. The formula is:
Supplier Quality Index = (Accepted Units / Total Units Received) × 100
Order Accuracy Rate measures how often incoming shipments match the purchase order. A high rate indicates that suppliers are consistently delivering the correct products and quantities.
Order Accuracy Rate = Accurate Orders / Total Orders × 100
Inventory problems can quickly become customer problems. If a product is unavailable, delivered late, or only partially fulfilled, customer satisfaction may decline. This section will explain the KPIs to evaluate customer satisfaction:
Stockout Rate measures how frequently requested products are unavailable when customers need them. A high stockout rate can indicate inaccurate forecasting, insufficient safety stock, or supplier delays. Here’s the formula of stockout rate:
Stockout Rate = Stockout Events / Total Demand Events × 100
Backorder Rate measures the percentage of customer orders that cannot be fulfilled immediately because inventory is unavailable. A lower backorder rate generally indicates better product availability. The formula is:
Backorder Rate = Backordered Orders / Total Orders × 100
Order Fill Rate measures the percentage of customer demand fulfilled from available inventory. A strong fill rate means customers are more likely to receive what they ordered without waiting for additional stock.
Order Fill Rate = Units Fulfilled / Units Ordered × 100
Perfect Order Rate measures the percentage of orders completed without errors, such as incorrect products, missing items, damaged goods, or late deliveries. This KPI provides a broader view of fulfillment quality than simply measuring whether an order was shipped.
Perfect Order Rate = Perfect Orders / Total Orders × 100
Inventory Lead Time measures the time between placing an order and receiving the inventory. For Philippine businesses that source products internationally, lead time can be affected by supplier schedules, customs processing, shipping, port activity, and local transportation.
Lead Time = Inventory Receipt Date/Time – Order Placement Date/Time
Another important KPI is CSAT, which measures how satisfied customers are with their experience. Although it is not an inventory metric by itself, CSAT can help businesses determine whether inventory availability and fulfillment performance are affecting customer experience.
CSAT = Satisfied Responses / Total Survey Responses × 100
Service Level measures the ability of a business to meet customer demand without running out of inventory. A high service level generally means customers can obtain products when they need them. The formula of service level is:
Service Level = Demand Fulfilled Without Stockout / Total Demand × 100
Operational inventory KPIs focus on the day-to-day efficiency and health of inventory management. Therefore, the KPIs help evaluate operational management of inventory processes. Here are the description and the formula of operational inventory KPIs:
Order Fill Rate can also be used as an operational KPI because it measures how effectively available inventory supports order fulfillment. Monitoring it across warehouses, branches, product categories, or sales channels can reveal where fulfillment problems are occurring.
Order Fill Rate = Units Fulfilled / Units Ordered × 100
Inventory Cycle Time measures the time required to complete a particular inventory process, such as receiving, picking, packing, or fulfillment. Reducing unnecessary cycle time can improve warehouse productivity. The formula is:
Cycle Time = Process Completion Time – Process Start Time
The third KPI of inventory management for operational inventory is Inventory Shrinkage. This KPI is the difference between recorded inventory and the actual physical inventory available. Below here is the formula of Inventory Shrinkage to evaluate operational management:
Inventory Shrinkage = Recorded Inventory – Actual Inventory
In addition, Aging Inventory measures how long products have remained in stock. Businesses can establish aging categories such as 30 or 180 days depending on the product lifecycle. It’s important for products that can expire or lose market value.
Inventory Age = Current Date – Inventory Receipt Date
The fifth KPI is dead stock, which refers to inventory that has little or no sales activity for an extended period. Tracking dead stock helps businesses identify products that may require promotions, liquidation, supplier returns, or purchasing adjustments.
Dead Stock Rate = Dead Stock Units / Total Inventory Units × 100
Holding costs represent the expenses associated with storing inventory. These can include warehouse space, insurance, handling, utilities, and security which determine whether maintaining additional inventory is financially worthwhile. The formula:
Inventory Holding Cost = Storage Costs + Insurance + Handling + Utilities + Obsolescence + Other Inventory Costs
Businesses can also calculate the holding cost rate:
Holding Cost Rate = Annual Holding Costs / Average Inventory Value × 100
Next, when evaluating operational inventory, it’s best to determine the inventory accuracy. This is to measure how closely system records match the actual quantity physically available. The formula of KPI inventory accuracy is:
Inventory Accuracy = Correct Inventory Records / Total Inventory Records × 100
Additionally, Demand Forecasting Accuracy is also important to be evaluated as KPI in operational inventory. A more accurate forecast helps businesses determine appropriate reorder quantities and safety stock levels. The formula is:
One simple method is to calculate the forecast error first:
Forecast Error = Actual Demand – Forecasted Demand
Then calculate accuracy:
Forecast Accuracy = (1 – (Actual Demand – Forecasted Demand) / Actual Demand) × 100
Another inventory management KPI also depends heavily on warehouse and logistics employees. Labor KPIs help managers understand how efficiently employees are handling inventory-related activities. Below here’s the KPIs that categorized for labor inventory:
Labor Cost per Item measures the amount of labor expense associated with processing each inventory item. This metric can help businesses compare productivity across warehouses, shifts, or processes. The formula is:
Labor Cost per Item = Total Inventory Labor Cost / Items Processed
Labor cost per hour measures the amount spent on inventory-related labor for each working hour. Tracking this KPI alongside productivity metrics provides more context than looking at labor expenses alone. The formula is consist of:
Labor Cost per Hour = Total Labor Cost / Total Labor Hours
Not every business needs to track every inventory KPI. Monitoring too many metrics can create unnecessary complexity and make it harder to identify the numbers that actually matter. Before selecting your KPIs, consider the following:
Accurate KPI tracking starts with reliable inventory data, often verified through a routine inventory audit. If inventory records are outdated or inconsistent, even a sophisticated KPI dashboard can produce misleading results. To track inventory KPIs effectively, businesses can follow these steps:
For Philippine businesses, this approach can also support more organized inventory recordkeeping. Under Section 6(C) of the National Internal Revenue Code, the BIR Commissioner has the authority to order inventory-taking of a taxpayer’s goods at any time during the taxable year, making accurate, audit-ready inventory records a compliance matter as well as an operational one.
With operations spread across various warehouses, channels, and suppliers, keeping track of inventory KPIs manually becomes a hassle. Managing multiple spreadsheets is time-consuming and also can lead to discrepancies in stocks.
Therefore, the inventory module of ScaleOcean Atlas eliminates the friction by centralizing your entire inventory ecosystem into a single, automated platform. Powered with ScaleMind, an integrated AI assistant, the software analyzes stock movements, flags anomalies, and delivers clear actionable insights for smarter demand planning.
Book a consultation today to transform how you track inventory performance and scale your business operations. You’d have access to features such as:
Inventory management KPIs reveal the effectiveness of your business in managing inventory, improving your operations, and meeting customer expectations. Businesses keep track of metrics such as inventory turns, days on hand, sell-through, and stockouts, rather than simply counting inventory.
Accurate inventory knowledge is essential to the business not just for everyday operations, but additionally for the financial reporting and tax compliance of the company. An integrated system allows you to have all your data in one place, allowing it to be tracked easily and seamlessly.
Streamline your inventory management and KPI tracking with the inventory module of ScaleOcean Atlas. Gain real-time visibility into inventory performance and make faster, data-driven decisions to improve operational efficiency.
Book a consultation with our team today to discuss your business needs with our experts.
One of the most helpful inventory KPIs is its turnover ratio. It reflects the velocity of a business’s sales and restocking. A high ratio may suggest that the company is having good sales, whereas a low ratio may suggest that the company is having slow moving or excess inventory.
Three common inventory measures are inventory turnover, Days Sales of Inventory (DSI), and inventory carrying cost. They show how quickly stock sells, how long inventory remains unsold, and how much it costs to store and maintain inventory.
Keep stock levels under control, monitor stock regularly, determine reorder levels, and carry out regular physical stock counts. Inventory software may additionally accurately track sales, purchase, returns and inventory movements.
