Working Capital

What Is Working Capital?

Working capital is the difference between a company's current assets and its current liabilities, measuring the short-term liquidity available to run the business. Positive working capital means cash, receivables, and inventory cover the bills due within a year. Negative working capital signals a funding gap.

How Working Capital Works

Current assets are anything expected to convert to cash within twelve months: cash itself, accounts receivable, inventory, and prepaid expenses. Current liabilities are anything owed within the same window: accounts payable, accrued payroll, short-term debt, and the current portion of deferred revenue. Working capital is the spread between them, and it moves every day as invoices go out, bills come due, and customers pay. The number matters less as an absolute than as a trend and a ratio. A company whose working capital shrinks for three consecutive quarters while revenue grows is converting sales into receivables faster than it converts receivables into cash. That is a solvable operating problem, but only if someone is watching the balance sheet rather than the income statement.

How to Calculate Working Capital

Formula: Working Capital = Current Assets - Current Liabilities

A software company holds $1,200,000 in cash, $900,000 in accounts receivable, and $150,000 in prepaid expenses, giving $2,250,000 of current assets. It owes $400,000 in accounts payable, $300,000 in accrued payroll, and $1,100,000 of deferred revenue to be delivered within the year, giving $1,800,000 of current liabilities. Working capital is $450,000, and the current ratio is $2,250,000 divided by $1,800,000, or 1.25. Notice what deferred revenue does here. It is a liability that will never be settled in cash, only in service delivery, so subscription businesses routinely look tighter on this calculation than they actually are.

Working Capital in Plain English

Working capital is the money a business can actually put to work over the next twelve months. Profit is an accounting opinion about a period. Working capital is a statement about whether payroll clears on Friday. The two diverge constantly, which is why profitable companies still fail. A business can book a record quarter, recognize the revenue, report a healthy margin, and still be unable to pay a vendor, because the customers who produced that revenue have not sent money yet.

The Cash Conversion Cycle: DSO, DPO, and Inventory

Working capital is a snapshot. The cash conversion cycle measures the same thing in elapsed time: how many days pass between paying for something and getting paid for it. It adds days sales outstanding (DSO), the average time customers take to pay, plus days inventory outstanding, how long goods sit before sale, and subtracts days payable outstanding (DPO), how long the company takes to pay its own suppliers. A hardware business with 55 day DSO, 40 days of inventory, and 35 day DPO runs a 60 day cycle, so every dollar of growth ties up cash for two months before returning. Software has no inventory, so the cycle collapses to DSO minus DPO. Cutting DSO is usually the highest leverage move available, because it needs no new capital, only accurate invoicing, tighter terms, and a collections process someone owns.

Why Growth Consumes Working Capital

Every incremental deal spends cash before it produces cash. Commission is paid at signature. Onboarding, support, and infrastructure costs land in the first month. The customer pays across the next twelve. That drain scales with growth rate, which is the counterintuitive part: the faster a company grows, the more working capital it needs, and a business growing 100 percent a year on annual contracts billed monthly can run out of money while every unit economic metric looks excellent. The same mechanic hits resellers paying vendors in 30 days while collecting in 60, and any team that concedes extended payment terms to win deals. A growth plan without a cash plan is half a plan.

How Companies Improve Working Capital

There are four levers, in rough order of cost. Collect faster: accurate invoices, automated dunning, and DSO owned by a specific person rather than shared by everyone. Restructure terms: annual upfront billing at a modest discount often returns more than the discount costs, and moving standard terms from net 60 to net 30 changes the cycle without touching price. Extend payables where the supplier relationship allows, though that lever is finite and expensive to overuse. Finally, finance the gap through a revolving line, receivables financing, or converting contracted future payments into cash today. Financing is the only lever that scales with growth, which is why fast-growing companies use it even when the first three are well managed.

Working Capital and the Closing Motion

The working capital gap opens at the close. A buyer signs, the seller books the deal, and cash then arrives in monthly installments for the next 24 months while commission, delivery, and support costs land immediately. Most B2B teams accept that as a fact of life because they treat the close as a signature. The Closing Motion treats it as a design flaw. With Ratio Trade, the buyer pays monthly or quarterly while the seller collects the full contract value at Close, with Ratio underwriting the buyer and managing the schedule. Ratio Boost does the same for contracts already signed, converting recurring revenue into upfront capital. Either way the receivable stops sitting on the seller's balance sheet, and Collect and Renew run against cash that has already arrived.

Common Questions About Working Capital

What is a good working capital ratio?

A current ratio between 1.2 and 2.0 is comfortable for most businesses. Below 1.0 means short-term obligations exceed short-term assets. Well above 2.0 can mean cash is sitting idle rather than being deployed, although software companies often carry high ratios by design.

Is negative working capital always bad?

No. Some businesses run negative working capital deliberately, collecting from customers before paying suppliers. Retail and marketplace models do this well. It becomes dangerous only when it results from stretched payables and unpaid bills rather than a structurally fast collection cycle.

Does deferred revenue reduce working capital?

On the standard calculation yes, because it sits in current liabilities, but it is not a cash obligation. It is settled by delivering service. Subscription businesses often look worse than their cash position warrants, which is why many analysts back deferred revenue out before comparing companies.

Key Takeaways

• Working capital equals current assets minus current liabilities and measures short-term liquidity, not profitability.
• The cash conversion cycle restates working capital in days: DSO plus inventory days minus DPO.
• Growth consumes working capital, because costs land at signature while cash arrives across the contract term.
• Deferred revenue distorts the standard working capital calculation for subscription businesses.
• Collecting contract value upfront while buyers pay over time removes the gap instead of financing it.