OptiSKU™

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-through76%

Sell less than about 76% of this order and it loses money before rent, marketing or salaries.

Worth knowing

Common mistakes

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

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

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