What is fill rate in fashion wholesale?
The share of ordered units, lines or orders that a supplier delivers in full, used to measure how reliably a brand fulfils wholesale demand.
In short
Fill rate is the percentage of a customer's order that a fashion supplier actually delivers. It can be measured by units, order lines or complete orders and shows how well a brand meets wholesale demand without shortages, substitutions or cancellations.
How does it work in practice?
A brand calculates fill rate by dividing shipped quantities by ordered quantities over a period. Unit fill rate looks at pieces, line fill rate at order lines delivered in full and order fill rate at orders shipped complete. For seasonal pre-orders, fill rate reflects production and allocation decisions; for replenishment and NOS programmes, it shows whether the warehouse can serve re-orders from stock.
Why does it matter for fashion businesses?
Every unfilled unit is a missed sale for both brand and retailer. Repeated shortfalls lead buyers to shift budget to more reliable suppliers or to demand compensation. Fill rate is also a diagnostic tool: low values for specific sizes, colours or factories point to forecasting errors, production problems or allocation rules that favour some accounts over others. For wholesale partners, a consistently high fill rate is often a condition for winning replenishment programmes and prominent space, so it deserves a regular place in account reviews and supplier scorecards alongside sales and margin.
How is AI changing it?
Demand forecasting models improve fill rate by aligning production and stock with likely orders at size and colour level. AI-driven allocation can distribute scarce inventory across accounts according to priorities and likely sell-through rather than first come, first served. Predictive alerts flag products where open orders exceed expected supply, giving teams time to expedite or offer alternatives.
Common pitfalls
- Mixing unit and order fill rate without clarifying the definition.
- Counting substitutions as filled demand.
- Hiding cuts by changing orders before measuring.
- Optimising fill rate at the cost of excessive safety stock.
Frequently asked questions
What is a good fill rate in fashion?
It depends on the business model. Replenishment and NOS programmes usually target higher fill rates than seasonal pre-orders, where production risk is greater.
How is fill rate different from OTIF?
Fill rate measures completeness of delivery. OTIF combines completeness with timeliness, counting only deliveries that are both on time and in full.