How Working Capital Impacts Financial Viability

What Working Capital is and why it matters

Working capital, also known as net working capital, represents a company’s ability to meet its short-term obligations using its current assets. This metric is essential for financial analysts and CFOs, as it allows them to assess operating solvency, anticipate liquidity crises, and plan business growth. This article analyzes its definition, components, calculation, sector-specific interpretation, relevance in financial transactions, and optimization strategies—including cases in which negative working capital is fully compatible with financial health.

It is calculated as the difference between current assets and current liabilities. In simple terms, it represents the resources available to finance day-to-day operations and immediate obligations. Adequate working capital ensures that a company can operate normally and meet its payments on time, avoiding liquidity issues that could jeopardize business continuity.

How Working Capital is calculated

Working Capital formula

Working capital (WC) is defined as the difference between current assets and current liabilities:

WC = Current Assets – Current Liabilities

Current assets include resources expected to be converted into cash within 12 months, such as cash and cash equivalents, accounts receivable, inventories, and other assets such as prepaid expenses.

Current liabilities include obligations due within the same period, such as accounts payable, short-term bank debt, and immediate tax or payroll obligations.

Positive working capital indicates that the company has sufficient internal resources to operate without relying on short-term external financing. Conversely, negative working capital suggests that current liabilities exceed current assets, which may be concerning in sectors requiring a permanent liquidity base. However, as discussed later, there are industries where operating with negative working capital is not only common but part of an efficient business model.

Current Assets: cash, inventories, accounts receivable, liquid investments.
Current Liabilities: accounts payable, short-term debt, other immediate obligations.

Practical calculation example

Assume a company has current assets of €400,000 and current liabilities of €250,000.

Working Capital = €400,000 – €250,000 = €150,000

This means the company has €150,000 available to cover its immediate obligations.

Working Capital vs. Operating Working Capital

Although the terms “working capital” and “operating working capital” are often used interchangeably, there are important distinctions:

• Working Capital: A more accounting-focused approach, centered on the difference between current assets and current liabilities.
• Operating Working Capital: A more finance-oriented concept that focuses on the operational management of inventory, receivables, and payables.

In practice, it is advisable to distinguish between accounting working capital and operating working capital. The former is a simple accounting difference between current assets and current liabilities, while the latter excludes cash and short-term financial debt to focus exclusively on operational components: accounts receivable, inventories, and accounts payable.

This distinction allows analysts to focus on capital directly tied to operations. For example, if a company holds significant cash due to an extraordinary asset sale or debt issuance, accounting working capital may appear strong even if operational activity is under strain. Therefore, when assessing operating health, it is advisable to examine operating working capital, which shows whether the company requires additional liquidity to sustain its production, sales, and collection cycles.

How to interpret Working Capital in your company

Proper interpretation of working capital supports better financial decision-making.

What it means when it is positive, negative, or zero

• Positive: The company has sufficient liquid resources to meet immediate obligations, supporting operational stability.
• Negative: Indicates potential liquidity issues, as liquid assets do not cover short-term obligations.
• Zero: Current assets exactly cover immediate obligations, reflecting a tight but potentially risky position.

The main risk of negative working capital lies in the lack of buffer to absorb deviations from the financial plan: customer defaults, sales delays, or inventory buildup can quickly strain liquidity. For this reason, working capital should be evaluated alongside other indicators such as operating cash flow, inventory turnover, and the cash conversion cycle.

Factors affecting the result

Interpretation of working capital must be tailored to the industry. In manufacturing sectors, maintaining positive working capital is common, as companies must finance inventory and extend trade credit to customers. A machinery manufacturer, for example, may have projects that take weeks or months to complete and collect, requiring permanent working capital funded by long-term resources.

In contrast, in the retail distribution sector—such as supermarkets or large retail chains—working capital may be structurally negative without posing a problem. Sales are collected in cash (or card) immediately, while supplier payments are deferred 60 or even 90 days. This timing gap allows operations to be largely financed by current liabilities. Mercadona, for example, collects daily at checkout while negotiating extended supplier terms, creating a source of financing at no financial cost.

The technology sector, particularly SaaS companies, also presents unique characteristics. Subscriptions collected in advance are recorded as current liabilities (deferred revenue), even though the cash has already been received. This may generate accounting negative working capital despite a comfortable cash position.

Insurance companies likewise have a distinctive profile: they collect premiums upfront but must provision for future claims. Although current liabilities may be high, they operate with significant cash balances.

Negative working capital should not automatically be interpreted as illiquidity. As seen in retail or SaaS, it may reflect an efficient strategy. However, in working-capital-intensive sectors such as manufacturing or agriculture, sustained negative working capital often indicates excessive reliance on short-term credit. Ultimately, working capital adequacy cannot be assessed without considering the underlying business model.

Working capital is particularly sensitive during periods of rapid growth. As sales multiply, inventory and accounts receivable requirements also increase, generating greater investment in working capital. If growth is not accompanied by adequate financing, a liquidity crisis may arise despite accounting profitability.

During economic crises or recessions, working capital is also affected. Delinquencies rise, sales decline, and inventories accumulate. Companies with limited working capital have less flexibility to absorb these pressures. In such contexts, planning and continuous monitoring become essential.

Finally, in high-interest-rate environments, financing working capital becomes more expensive. Companies relying on credit lines to sustain operations must reassess their working capital strategy. Optimizing internal resources, freeing up cash from operations, and renegotiating terms become priorities to avoid excessive financial costs.

Tips to improve Working Capital

Efficient working capital management enables the release of tied-up resources and reduces reliance on external financing.

Key action lines include improving receivables management by shortening credit terms, controlling commercial risk, and using instruments such as factoring to accelerate liquidity.

On the payables side, negotiating supplier terms to extend payment deadlines without harming commercial relationships is essential. Intelligent use of bargaining power can transform current liabilities into a cost-free financing source.

Inventory management is also critical. Methods such as just-in-time, combined with sound demand planning, proper stock sizing, a well-structured product portfolio, analysis of item turnover, control of obsolescence, and elimination of obsolete stock, can significantly reduce investment in inventory.

Finally, maintaining active treasury management and cash forecasting tools allows companies to anticipate needs and avoid last-minute, more expensive financing.

Relevance of Working Capital in M&A and business valuation

In mergers and acquisitions transactions, working capital levels are subject to negotiation. Buyers typically require a normalized working capital level to ensure operational continuity post-closing. If working capital falls below the agreed threshold, the purchase price is adjusted or additional capitalization may be required from the seller.

During financial due diligence, historical working capital evolution, seasonality, and its relationship to revenue are analyzed. This helps detect deviations or extraordinary requirements. In valuation models such as discounted cash flow (DCF), investments in working capital are deducted from projected future cash flows. Growth accompanied by higher working capital requirements reduces the company’s net present value.

Related ratios

To complement working capital analysis, several ratios refine interpretation. The most commonly used is the current ratio, which compares current assets to current liabilities. A value above 1.2 is generally considered healthy, although sector context matters.

Another relevant metric is the quick ratio (acid test), which excludes inventories from current assets to measure immediate liquidity without relying on less readily realizable assets. It is particularly useful in sectors with slow-moving or high-risk inventory.

Finally, the cash conversion cycle (CCC) measures the number of days between paying suppliers and collecting from customers, including inventory turnover. The formula combines days inventory outstanding, days sales outstanding, and days payable outstanding. The shorter the cycle, the greater the financial efficiency. A negative cycle, as seen in companies such as Amazon, reflects a significant competitive advantage.

External financial support and planning

Working capital is much more than an accounting indicator: it is a diagnostic tool, a management lever, and a key factor in strategic decision-making. For CFOs and financial analysts, understanding its behavior, optimizing its structure, and anticipating its needs is essential to ensure short- and medium-term financial viability. In retail models, it may be negative without risk; in others, such as manufacturing, it must remain positive. In any case, rigorous management improves liquidity, strengthens the company’s position with lenders, and enhances enterprise value.

Crucial moments such as expansions, mergers, acquisitions, or capital raising are situations where having solid working capital can make the difference between financial success and failure.

Engaging specialized financial advisory services or integrating a Fractional CFO can be an effective solution for companies that need to improve their working capital quickly. These professionals can implement efficient systems and strategies, optimizing financial and operational structure.

Javier de Rojas Roca de Togores

Partner – Maraz Corporate Finance