What is working capital, and how do businesses manage it?

The formula is simple; the composition is not

The SEC’s financial-statement guide gives the formula directly: current assets minus current liabilities. Its guide describes current assets as items expected to convert to cash within one year and current liabilities as obligations expected to be paid within the year. The SBA glossary names cash and equivalents, accounts receivable, inventory, marketable securities, prepaid expenses, and other near-term assets as examples of current assets. The precise classification in financial statements still depends on the applicable accounting framework and the business’s facts.

The one-year shorthand is not the whole classification rule under IFRS Accounting Standards. The IFRS Foundation’s comparison of IAS 1 with IFRS 18 uses the entity’s normal operating cycle as well as twelve-month and other criteria. It shows that trade payables and some operating accruals can be current because they belong to working capital in the normal operating cycle even if settlement occurs more than twelve months after the reporting date. Use the figures in properly prepared statements rather than reclassifying accounts from a mnemonic.

Working capital, cash, profit, and liquidity are different

A profitable business can still run short of cash. An SBA planning article gives two common mechanisms: working capital can be tied up in inventory, or in accounts receivable while B2B customers have not yet paid. A 2026 SBA resource-partner cash-flow session likewise distinguishes profit from cash in the bank and emphasizes projections, receivables, payables, and early identification of shortages. Revenue recognition does not make the customer’s money arrive on the same day.

Imagine a business recognizes a large credit sale this month, pays employees and suppliers now, and expects the customer next quarter. The sale can support accounting profit and increase receivables, yet the cash outflow occurs first. Growth can intensify the gap when each new order requires inventory, labor, or supplier deposits before collection. The underlying business may be viable while the timing still needs active funding and control.

The working capital cycle explains the timing

The FDIC and SBA Money Smart module defines the cash conversion cycle as the number of days required to turn investment in inventory and other operating resources into cash flow from sales. It separates that span into days inventory outstanding, days sales outstanding, and days payables outstanding. The conventional calculation is CCC = DIO + DSO − DPO: inventory time plus collection time, less the time before suppliers are paid.

For a hypothetical example, 45 inventory days plus 35 receivable days minus 30 payable days produces a 50-day cash conversion cycle. The number estimates operating timing, not a guaranteed date for each dollar. A service company with little inventory may emphasize receivable and payable timing instead. A business that takes customer payment before paying suppliers can even have a very different cycle shape.

How businesses manage working capital

Make receivables collectible, not merely larger

Receivable management starts before the invoice: establish customer identity and credit terms, make acceptance criteria clear, invoice promptly with the required references, and track aging and disputes. The SBA defines days receivable from receivables and annual credit sales, while FDIC recordkeeping guidance says maintaining receivable and payable records matters for cash-flow management. The adjacent accounts-receivable guide covers the full process; working-capital review should focus on conversion timing and concentration.

Hold inventory for an operating reason

Inventory supports sales, service levels, and resilience, so the answer is not indiscriminate reduction. Segment it by velocity, lead time, margin, criticality, obsolescence risk, and demand uncertainty. Then align purchase quantities and reorder decisions with actual consumption. The working-capital benefit comes from releasing cash from stock that no longer earns its place, not from creating shortages that damage revenue or operations.

Use payables deliberately and honor terms

Payables preserve cash between receipt and the agreed due date, but “manage AP” does not mean pay late by default. Maintain a due-date schedule, resolve invoice exceptions early, use valid discounts when their economics and cash plan support it, and negotiate terms before the obligation arises. Track supplier concentration and criticality because a longer payable period can transfer financing pressure to a vendor relationship the business depends on.

Forecast the gap and fund it explicitly

A rolling cash forecast should place collections, payroll, tax, supplier payments, debt service, and other material flows on expected dates, with downside cases for delay. The FDIC module recommends projections and cash reserves as operating tools. External financing can bridge a real timing need: the SBA’s 7(a) program lists short- and long-term working capital among permitted uses, and its working-capital line materials rely on timely statements plus receivable, payable, and inventory reporting. Financing adds cost and obligations, so it should support a defined operating cycle rather than hide recurring losses or uncollectible assets.

A monthly working-capital review