Guide · reviewed October 2026
What is sell-through?
Revenue is the headline. Sell-through is the story.
Sell-through is the share of the stock you bought that actually sold. Buy 100, sell 70: 70% sell-through. Every unsold unit is cost with no sale to pay for it.
The formula
sell-through = units sold ÷ units received
break-even sell-through = landed cost ÷ net money per sale
Worked example
A $40 tee with a $24.90 landed cost:
| Average price after a 15% discount | $34.00 |
| Less 3.5% payment fees | $32.81 net per sale |
| Break-even sell-through | 76% |
Sell less than about 76% of this order and it loses money before rent, marketing or salaries.
Worth knowing
- Measure it over a set period, like the first 8 or 12 weeks of a season.
- Look at it by size and color, not just by style. That's where the leftovers hide.
Common mistakes
- Judging a season by revenue alone.
- Discounting late instead of planning markdowns before you need them.
Questions
- What's a good sell-through rate?
- It depends on your price, margin and channel. What matters most is being above your own break-even sell-through.
- Is sell-through the same as inventory turn?
- No. Sell-through is a share of what you bought. Inventory turn is how many times you sell through your average stock in a period.
- How does OptiSKU use it?
- It uses your expected sell-through to size the order, work out cash and show how much stock is likely to be left.
Sources
- Ronnie Fieg on Kith's 15-Year Evolution (September 2026) · Complex
Kith's founder on buying to an 85–90% sell-through target and reported margins on brands it buys wholesale. - Mathematics for Retail Buying (Fairchild Books) · Bette K. Tepper and Newton E. Godnick
The standard textbook for retail math: markup, margin, IMU, markdowns and open-to-buy. - The State of Fashion 2026 · McKinsey & Company and The Business of Fashion
The industry's annual outlook, built from executive surveys and market data. Expects low single-digit growth in 2026.
Checked October 2026. Rates and rules change; confirm duty and tariffs with a licensed customs broker. All sources
Run it with your numbers
OptiSKU works this out for your own products, free in your browser. No sign-up to try.
Open it with this example