Sell-Through Rate Calculator

It depends on the length of the selling window and the category. For a full season (typically 10 to 13 weeks), 80 to 95 percent full-price sell-through is considered strong. Below 60 percent by end of season usually forces markdown. For weekly reporting, benchmark against a target STR curve that reaches 80 percent by the last 20 percent of the window. Apparel and fashion tolerate higher end-of-season markdown pressure. Grocery and consumables target 95 percent-plus weekly sell-through because shelf life constrains carry.

They measure related but different things. Sell-through is a percent (units sold divided by units received) over a specific window, typically weeks to a season. Inventory turnover is a ratio (COGS divided by average inventory) over a full year. STR is the leading indicator that catches over-buying and pricing errors at week 4 or 6 of a season. Turnover is the lagging indicator that confirms whether the operating rhythm was healthy at year end. Read both. STR triggers action. Turnover reports outcomes.

Units, not dollars. STR is a unit-side metric on purpose because dollar-side sell-through gets distorted by mid-season price changes. Units received is gross physical receipts (all POs booked into stock for the period). Units sold is net of returns but gross of markdown effect. If you want the dollar-side view, compute weighted average selling price separately and report both alongside STR. Never mix them into a single number.

Wholesale and franchise-driven retail models often push STR back to suppliers as a vendor scorecard metric. Low STR on a supplier’s SKUs signals over-buying pressure from the vendor side or forecast optimism the buyer swallowed. Formal vendor scorecards typically weight STR at 20 to 30 percent alongside on-time delivery, fill rate and OTIF. The OTIF Calculator covers the delivery-quality side.

Directly. Weekly STR against a target curve is the primary trigger for markdown timing. When week-6 STR sits 10 percentage points below the target curve, most category managers trigger the first markdown. When week-8 STR is still 15 points below, a second markdown fires. The Markdown Calculator does the price math once the STR trigger has been hit. Delaying markdowns because STR looks acceptable in absolute terms (without checking against the curve) is one of the most expensive mistakes in seasonal buying.

For a 10-week season, target 8 to 10 percent per week on average, front-loaded (higher in weeks 1 to 4, lower in weeks 8 to 10). For a 13-week season, target 6 to 8 percent per week. The target curve should not be linear because seasonal demand rarely is. Newness peaks early. End of season is markdown territory. Plot the target as a curve, then track actual STR against it weekly.

Yes, and this is the failure mode that gets overlooked. STR near 100 percent well before season end almost always means the buy was too small and top-sellers stocked out. Lost sales hide behind the flattering number because sales that never happened never appear in units sold. Always pair STR with in-stock percent at the SKU level, especially for A-class items. A 95 percent season STR with 8 percent stockouts on top SKUs is worse than 85 percent STR with 0.5 percent stockouts.

GMROI is the annual profitability-per-inventory-dollar view. Sell-through is the in-season pacing view that feeds into GMROI at year end. Categories that consistently miss STR targets end up with lower turnover and higher markdown pressure, both of which pull GMROI down. STR is the operational lever. GMROI is the financial outcome. Optimizing STR by season is one of the cleanest paths to lifting GMROI without touching supplier terms.

Sell-in is what the buyer ordered from the supplier (units on the PO). Sell-through is what the customer bought from the retailer (units off the shelf). In wholesale terminology, sell-in is what the brand shipped into the retailer. Sell-through is what the retailer moved through to the consumer. Confusing the two is common in first-year wholesale conversations and produces very different negotiation positions on markdown allowance and reorder timing.

Four show up repeatedly. Computing STR against opening ATS while ignoring mid-season receipts (inflates STR). Reporting a single-point number without comparing against a target curve (masks pacing problems). Mixing unit and dollar sell-through into the same conversation (produces contradictory conclusions). And celebrating high STR without checking stockout data (celebrates lost sales as a win). The Sell-Through Rate Guide covers each with a specific fix.