It is calculated using balance sheet items and shows how much capital a company has available for its day-to-day operations after short-term liabilities have been settled.
🔎 In this article, you’ll learn:
what net working capital is,
how it is calculated,
what it is used for, and
which typical interview questions are asked about it.
Working capital is the difference between a company's current assets and its current liabilities as per the balance sheet. Current assets are resources that can be converted into cash within one year, such as cash and cash equivalents, accounts receivable, inventory, prepaid expenses, and marketable securities. On the other hand, current liabilities are obligations the company must settle within the same period, including accounts payable, short-term debt, accrued expenses, wages, and taxes.
How is Working Capital Calculated?
Working capital is calculated using the formula:
Both current assets and liabilities are available on a company’s balance sheet. Finance professionals also calculate other metrics related to working capital such as working capital ratio and net working capital.
Net Working Capital (NWC) = (Current Assets - Cash) - (Current Liabilities - Debt)
Working Capital Ratio: Current Assets / Current Liabilities
What Does Working Capital Tell You About a Company?
The primary goal of working capital calculations is to assess a company's short-term financial health and liquidity. It paints a clear picture of the firm's ability to cover its short-term obligations using its current assets like cash, receivables, and inventory.
Generally, a positive working capital shows the company can meet its immediate obligations like payroll, suppliers, and rent without raising external capital. Negative working capital may signal potential cash issues, though context matters. For instance, capital intensive businesses like manufacturing typically need substantial working capital for inventory and receivables. Others like subscription services often use a negative working capital model where they collect cash from customers before paying suppliers.
Working capital also indicates:
Operational Efficiency: High working capital might mean excess inventory, slow collections, or inefficient cash management. Low or optimal working capital suggests efficient operations including collecting receivables quickly, managing inventory tightly, and negotiating favorable payment terms with suppliers.
Growth Capacity: Adequate working capital allows companies to fund growth without immediate financing. Insufficient working capital constrains expansion even if the business is profitable.
Risk profile: Persistently negative, tight, or deteriorating working capital increases refinancing and supplier risk while excess idle working capital may imply underutilized resources.
Common Interview Questions About Working Capital
Here are a few sample interview questions about working capital to help you practice.
1. What does positive vs. negative working capital indicate?
Positive working capital means that a company's current assets exceed its current liabilities. That’s often a sign of good short-term financial health and the ability to cover immediate debts and invest in growth or operations.
Negative working capital means current liabilities are greater than current assets. It can signal liquidity challenges or a need to rely heavily on operational cash flow. However, in some industries with fast turnover or advance payments, negative working capital can actually imply efficient operations and improved cash flow.
So, you must assess the why behind the negative or positive result and consider the business model.
2. If inventory increases, what happens to working capital and cash flow?
Inventory is a current asset. So, an increase in inventory raises current assets and therefore increases working capital. The build up of inventory means more assets are tied up and not yet converted to cash. As a result, cash flow usually decreases because the company has spent cash acquiring or producing the additional inventory.
3. What do you understand by “the change in working capital”?
The change in working capital implies the difference in the amounts of current assets and current liabilities from one period to another. A positive change means the company has increased its net current assets, which might indicate building inventory, collecting more receivables, or paying down short-term liabilities.
A negative change means a reduction in net current assets, potentially due to selling inventory, collecting receivables faster, or taking on more short-term liabilities. Changes in working capital directly affect cash flow. For instance, an increase in working capital usually means a use of cash, while a decrease releases cash into the business.
Practice More Question Sets For Your Finance Interview
Your client is NovaBank, a fast-growing European digital bank offering current accounts, debit cards and credit cards.
Over the past year the value of fraudulent card transactions has increased significantly. NovaBank relies on a rule-based fraud system, for example blocking transactions above certain amounts or coming from unusual locations. The system has two problems: it misses many sophisticated frauds, and it blocks a large number of legitimate customer payments.
NovaBank is considering replacing or complementing its rules with a machine-learning model, and has asked BCG X to assess whether machine learning can materially improve fraud detection, how the solution should be designed, what value it could generate, and how to roll it out without damaging the customer experience.
Your client is AltaVia Elevators, a Vienna-based elevator manufacturer and the number 4 player in Europe. The company has two businesses:
New equipment: AltaVia sells about 20,000 new elevator units per year to construction projects, generating about EUR 1.6 billion in revenue.
Service: AltaVia maintains about 400,000 units under paid service contracts, generating about EUR 960 million in revenue. Every installed elevator legally requires certified maintenance, and new units include two years of free maintenance by AltaVia. When that period ends, the building owner decides whether to sign a paid AltaVia service contract or switch to a third party. Paid service customers can also leave AltaVia later.
New equipment sales have just reached a record high and the order book is full. Yet group operating profit has declined for the third year in a row. Over the same period, LiftServ, a PE-backed independent service group, has been buying small maintenance firms across Europe and prices standard maintenance about 30% below AltaVia.
The CEO wants to know: why is profit falling despite record sales, and what should AltaVia do about it?
Your client is Gulf Coast Fuel Stops, a family-owned company operating 200 fuel stations across the Houston metropolitan area. Each station sells fuel and runs a small convenience shop. The business generates about USD 2.5 billion in revenue. Two years ago it earned about USD 108 million in operating profit; this year it will earn about USD 72 million, a decline of one third.
Over the same period, MegaMart, a large grocery chain, has opened 15 hypermarkets with their own cheap fuel pumps around Houston. MegaMart’s fuel is currently about 10 cents per gallon cheaper than Gulf Coast’s at nearby stations.
The CEO has asked your team to diagnose the profit decline and recommend how to restore profitability.
"FemVest" is a venture-backed fintech aiming to launch a mobile neobroker in Germany in 2026. The company believes that women are structurally underserved in the area of retail investing: women are less likely to hold a securities account, invest smaller amounts on average, and enter the market later than men. At the same time, the financial relevance of women is growing — driven by rising incomes, demographic shifts, and inheritances.
FemVest has already secured regulatory approval as well as a custodian bank and execution partner. However, key strategic decisions remain open: the target segment has not been finalized, the product and service offering is not yet defined, the business model has not been established, and the go-to-market strategy has not yet been developed.
The board is asking you, as a consultant, to analyze the market potential, develop an initial business case, and derive concrete strategic recommendations for market entry.
StyleNow ist eine Online-Modemarke der Otto Group, die Damen- und Herrenbekleidung ausschließlich über den eigenen Onlineshop vertreibt. In den letzten drei Jahren ist der Umsatz kontinuierlich gewachsen – unter anderem durch den gezielten Ausbau des Sortiments um neue Kategorien und Marken. Die Profitabilität hat sich jedoch trotz des Wachstums deutlich verschlechtert und das Unternehmen hat im gerade abgeschlossenen Geschäftsjahr erstmals ein negatives Ergebnis erzielt. Der Vorstand von StyleNow bittet das Inhouse Consulting um eine Analyse der Ursachen sowie eine konkrete Handlungsempfehlung.
Hinweis zur Sprache: Zur besseren Lesbarkeit verwenden wir in diesem Case teilweise das generische Maskulin. Selbstverständlich sind damit alle Personen gleichermaßen gemeint.
Working capital equals current assets minus current liabilities. Current assets are items that can be converted into cash within a year, such as receivables, inventory, or marketable securities. Current liabilities are short-term obligations like accounts payable, accrued expenses, wages, taxes, and short-term debt.
Efficient working capital management appears in tight inventory control, fast receivable collection, and favorable payment terms with suppliers. Low or optimized working capital often signals that the company converts resources into cash quickly rather than letting capital sit idle.
Adequate working capital allows a business to fund expansion, new projects, and daily operations without relying on immediate external financing. If working capital is insufficient, growth may stall even when the business is profitable.
Persistently negative or shrinking working capital increases liquidity, refinancing, and supplier risk. In contrast, excessively high idle working capital can signal poor cash management and underutilized resources.
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