Operating Cycle

The operating cycle is the average length of time between a business acquiring inventory and receiving cash from the sale of that inventory. For a retailer, it runs from the day goods arrive in the warehouse, through the time they sit on the shelves and the time customers take to pay. For a manufacturer, it starts with the purchase of raw materials and includes production time. The shorter the cycle, the faster a business turns its investment in stock back into cash.

The operating cycle matters in two ways. In financial reporting, it defines what counts as current: assets expected to be realized and liabilities expected to be settled within one year or the normal operating cycle, whichever is longer, are classified as current on a classified balance sheet. In financial management, it determines how much working capital a business needs to fund its operations.

The formula is:

• $\text{DIO}$ is days inventory outstanding, the average number of days inventory is held before sale, calculated as average inventory divided by cost of goods sold, times 365.
• $\text{DSO}$ is days sales outstanding, the average number of days taken to collect receivables, calculated as average accounts receivable divided by credit sales, times 365.

These measures are the inverse of the inventory turnover ratio and the accounts receivable turnover ratio, expressed in days.

A furniture wholesaler has annual cost of goods sold of $7,300,000 and average inventory of $1,200,000. Its DIO is $1,200,000 divided by $7,300,000, times 365, which is 60 days. Annual credit sales are $11,680,000 and average receivables are $1,440,000, giving a DSO of $1,440,000 divided by $11,680,000, times 365, or 45 days. The operating cycle is 60 plus 45, which is 105 days.

The wholesaler pays its suppliers on average after 30 days, its days payable outstanding. Deducting this gives the cash conversion cycle of 105 minus 30, or 75 days: the period for which the business must finance its stock and receivables from its own funds or borrowing. With daily cost of goods sold of $20,000, that gap ties up roughly $1,500,000 of cash. If the company cut its DIO to 45 days through better stock control, the operating cycle would fall to 90 days and about $300,000 of cash would be released.

• Industry: supermarkets sell stock quickly and are paid in cash or by card, so their cycles are short. Aircraft makers, wine producers and construction firms have cycles that can run for years.
• Inventory management: just-in-time ordering, accurate forecasting and clearing slow-moving stock shorten the inventory period.
• Credit policy: generous payment terms or weak collection practices lengthen the receivables period.
• Seasonality: businesses that build stock for a peak season have much longer cycles at certain times of year.

Lenders and analysts use the operating cycle to judge whether a company's short-term borrowing needs are reasonable and to spot deterioration: a lengthening cycle can signal unsold inventory or customers paying more slowly. Treasury teams use it to plan funding and to set targets for inventory and receivables. However, averages can hide problems in particular product lines or customers, and year-end figures can be distorted by seasonal patterns or by window dressing, such as running down stock just before the balance sheet date. Businesses with operating cycles longer than a year, such as distillers aging whisky, still classify the related inventory and receivables as current assets, which can make their liquidity ratios look different from those of companies with short cycles.