Cash flow keeps your business alive. Whether you're navigating rising costs, longer supplier lead times, or unpredictable customer demand, the ability to free up cash quickly can make the difference between growing and just getting by. That's why understanding the relationship between inventory and working capital has never been more important.
According to J.P. Morgan, optimizing inventory is one of the most effective ways to improve capital efficiency. When inventory sits on shelves, it ties up cash that could be used for payroll, marketing, or expansion. When it moves too fast (or you don't have enough), you risk stockouts and lost sales.
For a bit of historical context: back in 2020, businesses worldwide hoarded cash in response to uncertainty, driving the Working Capital Index to its highest level in a decade. By 2021, demand surged, supply chains tightened, and companies that had over-ordered found themselves with too much stock and not enough liquidity. That lesson still applies today.
The goal isn't simply to slash inventory. It's to find the right balance so you're not tying up capital in overstock or losing profit to empty shelves.
Yes, inventory is absolutely part of working capital. In fact, for many product-based businesses, inventory is the single largest current asset on the balance sheet.
Here's how it works: working capital is calculated as current assets minus current liabilities. Current assets include cash, accounts receivable, and inventory. Because inventory often represents a huge chunk of those assets, how you manage it has a direct impact on your overall liquidity.
Think of it this way. Every dollar locked up in unsold products is a dollar you can't use to pay suppliers, invest in marketing, or cover unexpected expenses. When you reduce excess inventory (or turn it over faster), you convert that idle stock back into usable cash. That's why understanding whether inventory is working capital matters so much for day-to-day operations and long-term growth.
When you optimize inventory, you directly improve your cash conversion cycle, the amount of time it takes to turn inventory purchases into cash from sales. A shorter cycle means cash returns to your pocket faster, giving you more flexibility and financial breathing room.
As J.P. Morgan notes, managing the components of your cash conversion cycle is key to capital efficiency. That means reducing how long inventory sits on shelves, collecting receivables faster, and negotiating favorable payment terms with suppliers.
Let's break down the key metrics.
The cash conversion cycle measures how many days it takes for your business to convert inventory and other inputs into cash.
Here's the formula:
CCC = DSO + DIO − DPO
A lower CCC means you're cycling cash faster. A higher CCC means cash is tied up longer in operations. Optimizing any of the three components can shorten your cycle and free up working capital.
DSO measures the average number of days it takes to collect payment after a sale.
The faster you collect, the sooner that cash is available for other uses. Shortening DSO often involves tightening credit terms, incentivizing early payment, or streamlining invoicing.
Days inventory outstanding measures how long inventory sits before being sold.
A high DIO means stock is lingering, tying up capital and potentially becoming obsolete. A lower DIO signals efficient inventory turnover. Reducing DIO is one of the most direct ways to improve working capital for product businesses.
DPO measures how long you take to pay your suppliers after receiving goods.
A higher DPO can be beneficial because it means you're holding onto cash longer. However, you'll want to balance this against supplier relationships and any early-payment discounts you might be missing.
Cash availability: When you sell off excess inventory or avoid overstocking in the first place, you free up cash that was previously locked in products. That cash becomes available for reinvestment, emergencies, or growth.
Debt reduction: Many businesses finance inventory purchases with credit. Carrying less inventory means carrying less debt, which reduces interest expenses and improves your financial position.
Reduction in payables pressure: With leaner inventory, you're not scrambling to pay off large supplier invoices. This gives you more flexibility to negotiate payment terms or take advantage of discounts.
If you want a quick snapshot of how much of your working capital is tied up in inventory, there's a simple ratio for that.
Inventory-to-Working-Capital Ratio = Inventory ÷ Working Capital
This ratio tells you what proportion of your net current assets is sitting in stock. A higher ratio means more of your liquidity is locked up in inventory. A lower ratio suggests your working capital is more diversified across cash and receivables.
There's no universal "good" number because it varies by industry. Retailers and wholesalers typically carry a higher share of current assets in inventory compared to, say, service businesses. What matters is tracking your ratio over time and understanding what's normal for your sector.
If your ratio is climbing and you're also experiencing cash crunches, that's a signal to investigate. You may be over-ordering, holding slow-moving SKUs, or not turning inventory fast enough. On the flip side, an unusually low ratio might mean you're understocked and risking missed sales.
Cutting inventory sounds great until you're staring at empty shelves and angry customers. The real goal is strategic reduction: trimming what you don't need while keeping what you do. Here's how to pull it off.
Accurate demand forecasting is the foundation of smart inventory management. When you can predict what customers will want (and when), you can order just enough to meet demand without piling up excess stock. Modern forecasting tools, including AI-powered solutions like Cin7 ForesightAI, analyze historical sales, seasonality, and trends to give you more reliable projections.
Not all products deserve equal attention. ABC analysis segments your inventory by value and velocity. Your "A" items (high value, high turnover) get close monitoring and precise reorder points. Your "C" items (low value, slow movers) might need smaller orders or clearance strategies. This approach lets you focus your energy and capital where it matters most.
Safety stock is the buffer you keep to guard against surprises. But too much safety stock is just overstock with a nicer name. Review your lead times and demand variability regularly. Tighten safety-stock levels where you can, especially for items with reliable supply chains.
Dead stock doesn't just tie up capital; it also takes up warehouse space and eats into margins if you eventually have to liquidate at a loss. Run regular reports to identify slow-moving or obsolete SKUs. Then move them through discounts, bundles, or secondary channels before they become a bigger drag.
If you sell across multiple channels (your own site, Amazon, retail partners, and so on), you need a single source of truth for inventory. Without it, you risk overselling in one place while stock gathers dust in another. Real-time visibility lets you redistribute inventory where it's needed and avoid both stockouts and overstock.
This is where inventory control best practices meet technology. An inventory management system (IMS) like Cin7 connects all your channels, giving you up-to-the-minute stock counts and the ability to act quickly when something's off.
Take Smidge Beverage Co., an Arizona-based ultra-low-alcohol vodka seltzer brand. Founder Adam O'Connor shared that he "underestimated the importance of cash flow" early on. Co-manufacturers wanted large upfront deposits, leaving little cash for operations and payroll. After implementing Cin7, he gained accurate, real-time inventory and reporting at his fingertips, significantly reduced his reliance on Excel spreadsheets, and achieved seamless QuickBooks syncing. That gave him the confidence and control to scale without replacing the system.
Reducing inventory is easier said than done, especially when you're juggling multiple warehouses, sales channels, and suppliers. That's where Cin7 comes in.
Cin7's inventory management system gives you advanced reporting and analytics so you always know what's selling, what's sitting, and what's about to run out. With AI-powered demand forecasting, you can plan purchases more accurately and avoid the guesswork that leads to overstock. And because Cin7 integrates with your e-commerce platforms, accounting software, and fulfilment partners, you get a single, real-time view across your entire operation.
The result? Less cash trapped in inventory, faster turnover, and a healthier cash conversion cycle.
If you're curious how much working capital you could free up, try the Cin7 ROI calculator to see potential savings based on your business.
Yes, when you reduce excess inventory, you free up cash that was tied up in unsold stock. This improves your working capital and shortens your cash conversion cycle. The key is trimming excess, not cutting so deep that you cause stockouts.
There's no single "right" number because it varies by industry. Retailers and wholesalers naturally run higher ratios than service businesses. What matters is tracking your own ratio over time; a lower or falling ratio generally means more of your capital is liquid rather than locked in stock.
Working capital is the money available to run daily operations (current assets minus current liabilities). Inventory is just one current asset that feeds into that calculation. So inventory is a piece of working capital, not the same thing.
Working capital equals current assets (cash, accounts receivable, and inventory) minus current liabilities. Because inventory is often the largest current asset for product businesses, changes in stock levels move your working capital up or down directly.
Good inventory management keeps the right amount of stock on hand so cash isn't trapped in slow-moving products or lost to stockouts. Better forecasting, faster turnover, and real-time visibility all free up cash and improve working capital efficiency.
Inventory and working capital are tightly linked. Carry too much stock and you starve other parts of your business for cash. Carry too little and you lose sales. The sweet spot is somewhere in between: smart forecasting, real-time visibility, and continuous optimization.
By focusing on metrics like DIO and the cash conversion cycle, clearing out dead stock, and using tools that keep you in control, you can reduce the amount of capital tied up in inventory without sacrificing customer satisfaction. That's good for your balance sheet, and even better for your peace of mind.