Sell-Through Rate

What is Sell-Through Rate?

Sell-Through Rate (STR) is the percentage of available inventory sold during a given period, typically one month.

A high STR means your inventory is moving efficiently. Every unit sitting on a shelf costs you money and occupies space that could hold faster-moving products. When your STR drops, it's a signal that something is off — whether that's pricing, demand, seasonality, or product mix — even if it doesn't tell you exactly what.

Use STR as an early warning system. When a number looks wrong, dig into the product-level data to find out why.

Sell-Through Rate formula

Sell-Through Rate (%) = (Units Sold / (Beginning Inventory + Units Received)) × 100

Where:

• Units Sold: The number of units sold during the period.
• Beginning Inventory: The number of units in stock at the start of the period.
• Units Received: The number of units added to inventory during the period.

Example

Say you start the month with 200 units, receive 100 more from your supplier, and sell 180 units by month-end:

STR = (180 / (200 + 100)) × 100 = 60%

A 60% STR means you moved more than half your available inventory — a healthy result for most product categories.

What a good Sell-Through Rate looks like

There's no universal benchmark. STR targets vary by industry, product category, and seasonality. That said, a rate below 20% is a common threshold for concern, while rates above 80% may indicate you're running lean and risking stockout risk.

Track STR over time and by product segment rather than chasing a single number. Consistent trends matter more than any single month.

Reporting frequency: Monthly

Example target: 20% or higher

Also known as: Sell-thru, % Sell-Through

How to act on Sell-Through Rate

A low STR doesn't tell you what's wrong — it tells you something is wrong. Here's how to investigate:

• Segment by product. Identify which SKUs are dragging down your overall rate. A few slow movers can mask strong performance elsewhere.
• Check seasonality. A dip in STR during an off-season may be expected. Compare the same period year-over-year before drawing conclusions.
• Review pricing and placement. Slow-moving inventory may need a markdown, a promotional push, or better shelf positioning.
• Adjust your purchasing. Use STR trends to inform future orders. Reduce quantities on underperforming products and increase stock for your top movers.

Why Sell-Through Rate matters for inventory decisions

STR is most valuable as a supply chain signal. Physical retailers competing with e-commerce platforms need to keep inventory lean and responsive. Carrying excess stock ties up capital and increases the risk of markdowns or write-offs.

Tracking STR in a dashboard alongside related inventory metrics — like inventory turnover and days of supply — gives you a complete picture of how your stock is performing. With Klips, you can connect your inventory and sales data sources, build a real-time STR view by product or location, and share it with the people who need to act on it.