A high DSI value may be preferred at times, depending on the market dynamics. The days sales of inventory (DSI) is a measure of the liquidity of a firm’s inventory—that is, how long it takes a company to turn its inventory into sales. The optimal DIO balances inventory carrying costs against stockout risks while considering industry norms and company-specific factors. These differences can stem from various factors, including product shelf life, production complexity, supply chain reliability, and market demand patterns. So, a DIO in one industry may differ greatly from what would be considered optimal in another, making industry-specific benchmarking essential for meaningful analysis. For SMBs looking to improve the control they have over cash flow, getting on top of days inventory outstanding is a great start.

70% of survey respondents see DSO as biggest cash flow challenge

The number of days is usually 365 for a full year, but you can adjust it for quarterly or monthly calculations. One SKU used to sell 100 units a week, but lately, it’s only moving 10. Your DIO shoots up, storage costs rise, average days inventory outstanding and now you’re sitting on inventory that’s lost its edge. If your sales velocity stalls, your inventory storage balloons and that usually means it’s time for some tough decisions. Spreading inventory across multiple locations might sound strategic, but when it’s not moving, you’re essentially duplicating inefficiency. The more places you store slow-moving stock, the more your DIO climbs and your costs right along with it.

Days of Sales of Inventory vs. Inventory Turnover

Days Inventory Outstanding (DIO) measures how long it takes to sell inventory, and lower DIO improves cash flow. If you’re like many business leaders, you probably don’t have a clear answer to this question. We’re going to help you change that by introducing you to a metric known as days inventory outstanding. This formula can also be calculated by using the accounts receivable turnover ratio. Send invoices promptly to ensure timely payments from your customers.

Can reducing DIO lead to stock shortages?

• Days Inventory Outstanding (DIO) is a liquidity metric which measures the average number of days inventory is held in a business before it is sold.
• Removing these items from circulation ensures more accurate DIO calculations and improves your real-time visibility.
• Days Sales Outstanding (DSO) measures the average number of days it takes a business to collect payment after a sale.
• Using analytics software gives finance teams a view of customer payment patterns and highlights accounts that need attention.
• With this in mind, continue reading to learn more about what days inventory outstanding is, the DIO formula and how to calculate it, and specific strategies to improve your DIO over time.

Inventory rationalization is the practice of reviewing and optimizing a company’s inventory to ensure that only the most necessary, profitable, and in-demand items are being stocked. One of the best ways to improve your DIO is to get a better understanding of what demand for your products looks like. An easy way to do this is to take our beginning inventory, add it to our ending inventory, and divide it by two to get an average. The quantity of inventory that is consumed or sold within a specific time period.

Cost of Goods Sold (COGS)

It’s an early sign that you’re nearing the end of its lifecycle, and action is needed before it turns into dead stock. Imagine you’ve committed to purchasing 1,000 units per shipment to secure a lower price, but sales data shows you’re only able to move 400 units per month. That leaves you sitting on excess stock for months stock that eats up space, capital, and opportunity.

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And if you send the account to a collection agency, they may collect a percentage of the balance. For example, let’s say you have $20,000 in accounts receivable and sold $10,000 on credit in a 30-day period. Using the DSO formula, you find it takes an average of 60 days to collect your invoices. Most business owners compare figures quarterly or annually, not over prior time periods. A rolling 12-month DSO calculation highlights seasonal patterns and long-term collection trends. By comparing each month to the 12-month average, companies can quickly spot problems.

The inventory turnover ratio and Days Inventory Outstanding (DIO) go hand in hand when it comes to measuring inventory efficiency. The inventory turnover ratio tells you how many times the stock is sold and replenished in a given period, while DIO shows how long, on average, inventory sits in storage before being sold. A high inventory turnover ratio means stock moves quickly, keeping DIO low—great for cash flow and reducing storage costs.

How to Ship Fragile Items: Secrets from Industry Experts

• Use historical sales data, seasonal trends, and real-time analytics to predict demand accurately.
• Poor demand forecasting leads to either overstocking (high DIO) or stockouts (low DIO).
• A lower CCC signals that a business is able to convert its inventory and receivables into cash faster.
• January has 31 days, so 31 will be the number of days we use in the DSO formula.
• A significant gap in DIO values may signify a problem with your inventory management practices.

Conversely, a high DIO might signal overstocking or sluggish sales, potentially tying up valuable capital in unsold goods. DIO indicates the number of days on average that a company holds its inventory before selling it. Therefore, this is the measuring glass for understanding the company’s inventory management effectiveness. Investors and financial analysts use DIO to evaluate a company’s financial health and operational effectiveness. A company that efficiently manages its inventory demonstrates strong operational performance, making it a more attractive investment.

Based on this calculation, we can say that this particular small e-commerce seller sells its inventory in an average of 54.75 days. For example, a retail seller should aim for a lower DIO, especially in the case of fast-moving goods. Like DIO, the average inventory metric helps keep track of and level out stock. Going lean in business means trimming the fat from wasteful activities.

It may indicate overstocking, sluggish sales, or ineffective inventory management practices. Companies with a high DIO may face increased carrying costs and liquidity challenges. Streamlining the sales process can lead to faster inventory turnover. The quicker a company can close sales, the sooner it can reduce inventory levels and improve cash flow.

Spot seasonal or trend-based increases in DSO and work with accounting and customer success to troubleshoot and resolve them. It slows operations, limits flexibility, and eats up space meant for fast-turning goods. Keeping high stock across all channels might seem safe, but in reality, it’s inefficient and costly. Your product might be a star in one channel and a slouch in another. Days inventory outstanding reveals these channel mismatches, giving you the insight to reallocate inventory where it truly belongs.

Better forecasts lead to more precise inventory levels, reducing both overstocking and stockouts. Reducing your DIO means you’re converting inventory into cash faster, a good sign for liquidity and overall financial health. JIT inventory management is a strategy that seeks to minimize stock on hand to align perfectly with actual sales demand. A lower CCC signals that a business is able to convert its inventory and receivables into cash faster. This is a positive sign for cash flow management, meaning the business can then reinvest in more inventory or other growth initiatives. The DIO metric looks at how quickly your business turns over its inventory.