Working Capital Explained: The Money That Keeps a Business Running

Working capital is the money a business needs to run its day-to-day operations: the cash tied up in stock, the money owed by customers, and the buffer it holds against timing differences. It is the most common reason a profitable business gets into difficulty, because profit and cash are not the same thing.

Working capital, defined

The conventional definition is current assets minus current liabilities. In practice, it is easier to think about it as the cash cycle:

1. You buy stock or materials.
2. You hold the stock until it sells.
3. You sell, often on credit, creating a receivable.
4. You collect the cash.
5. You pay your own suppliers.

The length of that cycle, and the amount of money tied up at each stage, is what determines how much working capital a business needs.

Why profitable businesses run out of cash

A business can be profitable on paper and still unable to pay wages. This happens when:

• Growth consumes cash. A business that doubles its sales must usually buy more stock and offer more credit before it collects more cash. Growth is a cash outflow before it is a cash inflow.
• Customers pay slowly. A sale on sixty-day terms is not cash in the bank today.
• Stock is over-bought. Bulk discounts are only a saving if the stock sells.
• Suppliers demand cash. Moving from credit terms to cash-on-delivery shortens the time available to pay.
• Seasonality is ignored. Many businesses in Uganda have pronounced seasonal cycles and need more working capital in some months than others.

Measuring your own cycle

Three numbers tell most of the story, and all three can be calculated from your own records:

• Days inventory — how long stock sits before it sells.
• Days receivable — how long customers take to pay.
• Days payable — how long you take to pay suppliers.

Add the first two and subtract the third and you have your cash conversion cycle in days. The shorter it is, the less money you need to keep the business running. Tracking these numbers monthly turns working capital from a vague worry into a measurement.

What reduces the need for working capital

• Tighter credit control — invoicing immediately, following up on the due date rather than after it, and offering a modest discount for early settlement where the margin allows.
• Better stock discipline — knowing which lines actually move, and not carrying the rest.
• Negotiating supplier terms — asking for terms consistent with your own sales cycle.
• Deposits and progress payments — where your market accepts them, asking for a deposit turns a cash outflow into a shared one.
• Reducing the cash cycle by collecting faster rather than borrowing more.

What funds the need

The right instrument matches the life of the need:

• Overdraft or revolving facility — suits fluctuating, short-term needs and seasonal peaks. It is drawn when needed and repaid when cash comes in.
• Invoice or receivables finance — advances cash against invoices already issued, shortening the gap between sale and collection.
• Stock or trade finance — funds the purchase of specific goods, usually repaid from their sale.
• Term loan — suits assets that will be used for years, not months. Using long-term debt to fund a short-term need, or the reverse, usually creates problems.

Key takeaways

• Working capital is the cash tied up in running the business, not the same as profit.
• Growth, slow-paying customers and over-bought stock are the usual causes of a cash squeeze.
• Days inventory, days receivable and days payable let you measure your own cash cycle.
• Match the funding to the life of the need: short-term facilities for short-term gaps.

Frequently asked questions

What is working capital?

Working capital is the money available to a business for day-to-day operations, calculated as current assets minus current liabilities. It covers stock, money owed by customers and short-term obligations.

Why is working capital important?

Without enough working capital, a business cannot pay wages, suppliers or rent on time, even if it is profitable. Shortages can force a business to turn down orders or sell at a discount to raise cash quickly.

How much working capital does a business need?

It depends on the length of your cash cycle and how variable your sales are. Calculating days inventory, days receivable and days payable gives a practical starting point for your own business.

Sources & references

• Bank of Uganda — monetary policy publications and financial stability reporting.

This article is provided for general educational and informational purposes and does not constitute financial advice. Facility terms are agreed case by case. See our Business Banking service page for the facilities available.

Related reading

• Managing Cash Flow: A Guide for SMEs
• How to Prepare a Business Loan Application
• Business Banking