Sell-Through Rate Formula
How apparel teams calculate sell-through rate, why full-price sell-through matters more than total, and the channel benchmarks that signal a winner, a chase candidate, or a markdown risk.
What Sell-Through Rate measures
Sell-through rate is the percentage of a style's received units that have sold in a given period. It is the primary signal of whether a product is winning, trending, or headed for markdown.
Sell-Through % = Units Sold ÷ Units Received × 100The single most important apparel nuance: sell-through must be tracked at full price separately from total. A style at 75% total sell-through with only 40% at full price is a markdown-driven success, not a real winner.
Worked apparel example
A DTC brand received 1,000 units of a core tee. Six weeks into the season, 620 units have sold.
Sell-Through % = 620 ÷ 1,000 = 62.0%
Strong for Week 6. Before acting, split it: if 520 sold at full price and 100 on a first markdown, full-price sell-through is 52%. That is a candidate for chase if lead times allow. If 350 sold at full price and 270 on markdown, total sell-through is the same 62% but full-price is 35% — the style is a markdown-driven mid-performer, not a chase candidate.
62.0% sell-through is acceptable. Watch the residual for markdown exposure.
Benchmark ranges
These are full-season total ranges. In-season read points work differently: 20–25% sell-through by Week 3 on a 12-week season is strong; 35%+ by Week 6 usually warrants a chase discussion.
Failure modes we see
Total sell-through treated as the winner signal. A style with 70% total sell-through looks strong in the dashboard. A planner chases on it. The reorder lands. Then the markdown data reveals 45% of the original buy sold at markdown — and the chase units have the same issue waiting.
Specific patterns:
- No full-price split. Sell-through reports show a single number. The markdown contribution is invisible until hindsight.
- Size-level sell-through missed. A style at 70% total can be 85% on core sizes and 45% on extended sizes. Average hides the imbalance.
- No hit-rate context. A 30% sell-through on a slow-selling basic is different from a 30% sell-through on a fashion item 4 weeks in.
How RetailNorthstar handles sell-through
Sell-through runs at every grain: style, color, size, channel, door, and week — full-price split out from total. When a style crosses the chase threshold, the system surfaces it and models a reorder against open OTB, available lead time, and forecast.
Sell-through is the feedback loop on every other decision — IMU, assortment depth, size curve, pricing. It either confirms the plan or points at the specific style, color, or size that broke it. The only way to act on that signal at speed is to see it live, not wait for the hindsight meeting.
Related formulas
- Weeks of Supply — the inverse lens; high sell-through drives low WOS
- Markdown % — the drag on sell-through quality
- Open-to-Buy — sell-through drives chase OTB availability
See how RetailNorthstar splits full-price from total sell-through at style × size × channel — in time to act.
Book a Demo →Frequently asked about Sell-Through Rate
What is the sell-through rate formula?
Sell-Through % = Units Sold ÷ Units Received × 100. "Units Received" can be the original buy for a finite-life style, or beginning-of-period inventory (BOP) for a replenishment read.
Why track full-price sell-through separately from total?
Total sell-through can hide markdown-driven performance. A style at 70% total sell-through might be 40% at full price and 30% at markdown — a very different product decision than 70% at full price. Always split.
What is a healthy sell-through for apparel?
DTC healthy band is 50–70%+ total, wholesale runs 60–80%+, luxury 55–70%+. In-season, 20–25% sell-through by Week 3 on a 12-week season is strong; 35%+ by Week 6 often warrants a chase discussion.
When should I reorder a style based on sell-through?
Strong full-price sell-through early in the season — typically 30–40% by Week 4 on a 12-week curve — is the chase signal. Cross-check against lead time, remaining selling weeks, and size availability before placing the reorder.