Stock turnover

Definition

Stock turnover (or inventory turnover) measures how many times a business sells and replaces its stock over a period. A higher turnover means stock moves quickly and less cash sits tied up in inventory; a low turnover signals slow-moving stock and trapped working capital.

In plain terms

If you sell through your average stock six times a year, your stock turnover is six, and stock sits for about two months before selling. The slower it turns, the longer your cash is frozen on the shelf rather than working in the business.

Why it matters

Stock turnover is a core cash-flow metric, not just an operational one. It is one leg of the cash conversion cycle, and improving it releases cash directly. See stock and cash flow.

In practice

Picture a small UK limited company selling equipment through a modest trade range. Directors reviewing stock turnover are really asking whether the shelves are working for the business or against it. A steady, predictable turnover across a trading period suggests buying decisions are matched to genuine demand, and that cash spent on stock is coming back round in reasonable order rather than sitting idle in a warehouse.

Where turnover slows against the company's own recent history, that is usually the more useful signal than comparing to any industry norm. A director might notice a particular product line consistently lagging the rest of the range, or a seasonal build-up that never quite clears before the next one arrives. Reviewed alongside management accounts each period, stock turnover becomes an early-warning indicator for working capital pressure well before it shows up starkly in the bank balance.

How lenders read it

When a lender looks at a company's stock turnover, the number itself matters less than the trend and the story behind it. A consistent or improving turnover supports the picture of a business that converts stock into cash reliably, which feeds into how comfortably it can service short-term finance. A worsening trend invites more questions: is it a deliberate strategic build-up ahead of a known order, or a sign that stock is becoming harder to shift.

Lenders will typically also weigh stock turnover alongside the wider cash conversion cycle, since a slower stock turn can be offset, in part, by faster collection from customers or longer terms from suppliers. Sector context matters too — what looks slow in one trade may be entirely normal in another, so directors are usually better served explaining the pattern in their own words than relying on the ratio in isolation.