ATS is the quantity of a product a brand can still sell after existing commitments are deducted from physical and incoming stock.
Sep 24, 2026
Available to sell starts from the stock a brand physically holds, adds units already in production or in transit, and then subtracts everything that is already promised: confirmed orders, allocations held for key accounts, and units reserved for other channels such as the brand’s own retail.
The result is the number a sales rep can safely quote. Selling against total stock rather than ATS is the most common cause of oversold styles and cancelled lines late in a season.
ATS is not a static figure. It changes every time an order is confirmed, a delivery arrives, a buyer cancels, or a reservation expires. In practice this means ATS is only useful if it is recalculated continuously and shown at the moment of ordering.
Brands selling in-season typically expose ATS directly to buyers so that self-service orders cannot exceed what exists. Brands selling pre-order work the other way around: there is no stock yet, so availability is governed by production capacity and cut-off dates instead.
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