Sell-through tells you whether stock actually moves.
A high sale price is exciting; stock velocity is what keeps a resale business liquid. Sell-through helps compare categories, suppliers and buying decisions when you define the time window consistently.
For a simple closed cohort, use sold items ÷ (sold items + items still active from the same starting cohort) × 100. Example: 30 sold and 70 still active = 30% cohort sell-through.
Always state the time window and population. “50% sell-through” means little unless you know whether that is 7 days, 30 days, 90 days, a calendar month or the life of a batch.
Make the metric comparable before you use it.
Choose a cohort
Example: items first listed in June, one specific bale, or all vintage tees acquired in Q2.
Choose a review date/window
30, 60 or 90 days can be useful depending on your category. Keep it consistent across comparisons.
Count sold and remaining eligible stock
Exclude items that were never actually listed if your question is listing performance; include them if your question is sourcing/bale recovery.
Calculate the rate
Sold ÷ (sold + remaining) × 100 for that defined cohort.
Pair it with profit
Fast-selling low-margin stock and slow high-margin stock can both be valid. Compare sell-through with net profit, ROI and cash tied up.
Why denominator discipline matters
Resellers often use “sell-through” to mean different formulas. The solution is not to argue about one universal definition; label your metric and keep the same population/window when comparing decisions.
Use sell-through to improve sourcing
Compare suppliers, brands, sizes, categories and acquisition channels. If one source produces 60% 60-day sell-through and another produces 12% at similar margin, that is actionable purchasing information.
Do not optimise velocity alone
Clearance pricing can make sell-through look brilliant while destroying profit. A useful dashboard holds velocity and economics together.
Quick checklist
- Cohort defined
- Start/list date defined
- Review date defined
- Sold count correct
- Remaining count correct
- Cancelled/returned treatment consistent
- Profit/margin compared alongside rate
Never quote a sell-through percentage without being able to answer: “of what stock, over what period?”
What is a good sell-through rate for reselling?
There is no single good rate across all categories and price points. Compare like with like: same time window, similar category, similar margin and similar stock age.
Should returned items count as sold?
Use a consistent rule. If the item is back in active stock, many resellers treat it as unsold for a current-stock cohort; document the approach.
Is eBay sell-through the same as my inventory sell-through?
Not necessarily. Marketplace research ratios and your own cohort sell-through can use different denominators. Label them clearly.
Turn the advice into a repeatable workflow.
Track stock age, cost, sale price, profit and marketplace activity instead of trying to remember it all.