Sell-Through Rate

The recommended formula is: (units sold − units returned to stock) ÷ (opening stock + units received) × 100. Use one month for steady lines and the full selling season for seasonal goods.

Use opening stock plus units received, because that is everything you could have sold. Units received alone fails whenever sales draw on stock you already held, as the worked example below shows.

Resellers use the same logic with listings. With 88 active listings and 22 sold in 90 days, the rate is 22 ÷ (22 + 88) = 20%. Sales are divided by what was available to sell.

The result changes because each formula counts a different amount of stock. This worked example uses illustrative numbers. Opening stock is 400 units, 200 units are received, 350 are sold and 20 come back into stock, so closing stock is 270 (400 + 200 − 350 + 20).

Three bases, one month, three different rates

The test: if sold ÷ received exceeds 100%, you sold opening stock as well, so switch bases. Check the last row another way: net units sold ÷ (closing stock + net units sold) = 330 ÷ (270 + 330) = 55%. If the two calculations disagree, a receipt, a sale or a return is missing from the records.

There is no single good figure, because benchmarks vary by category. Marketplace resellers see the same spread: "sell through rates are massively different one person to another and one item to another".

The recommended approach is to judge each line against its own history for the same category, the same window length and the same point in the season. Example only: a line that usually reaches 40% two weeks into a season is doing well at 60%, while a line that ends the season at 60% against a usual 85% needs a markdown review. For a line well below its average, see slow-moving inventory.

Between a manufacturer, distributor and retailer, sell-through is the share of units shipped to the next party that it has sold on to the party after it. Sell-in is the shipment to that next party. Wikipedia describes sell-through as the percentage of a product sold by a retailer after its supplier ships it.

The terms primary sales (manufacturer to distributor), secondary sales (distributor to retailer) and tertiary sales (retailer to consumer) name each hop.

To measure the manufacturer-to-distributor hop, divide secondary sales by distributors' opening stock plus primary sales. Whichever hop is measured should be named, so that figures can be compared.

Rate of sale is a speed, not a percentage. It counts units per period, often per store per week. If 480 units sell over 6 weeks across 20 stores, the rate of sale is 480 ÷ 6 ÷ 20 = 4 units per store per week, whether you stocked 500 units or 5,000. It feeds the reorder point.

Inventory turnover is cost of goods sold (COGS) divided by average inventory value for a year. See Calculate Inventory Turnover Days. Sell-through is the short-window, line-level view of the same stock.

Arka Inventory is cloud inventory software built natively on Salesforce, with plans listed on our pricing page (as of October 2026). Sell-through rate needs four numbers: opening stock, receipts, sales and returns. We keep them in one system.

• Our Monthly Movements Report tracks opening and closing stock month to month.
• Receiving and returns management record what comes in and what comes back.
• Sales Orders, on our Enterprise plan, record what you sold.
• Our custom reports and dashboards let you tailor reports to the numbers your team reviews.

The formula only works when the stock records are right. Perpetual Inventory System: Test Your Stock Records in India shows how to test them, and Inventory Dashboard covers what to put on screen. Our 15-day free trial needs no credit card.