Inventory Turnover › Fill Rate
Fill Rate Benchmarks by Sector 2026
Fill rate is the percentage of customer demand met from available inventory without backorder, substitution, or stockout. B2C retail targets 95-98%; B2B grocery wholesale operates near 96-99%; pharmacy dispensing approaches 99%.
Three definitions you need to keep separate
Line fill rate
Percentage of order lines fully shipped. An order with 10 lines where 9 ship in full = 90% line fill.
Unit fill rate (case fill)
Percentage of units shipped against units ordered. More forgiving than line fill: partial shipment of a line counts proportionally.
Order fill rate
Strictest definition. Percentage of orders shipped 100% complete. An order with 10 lines where 9 ship in full but 1 is short = 0% order fill.
When comparing fill rates across companies or contracts, always confirm which of the three you are looking at. Vendor reports almost always cite unit fill; retailer scorecards usually use line fill; perfect-order metrics use order fill.
Sector benchmark table
| Context | Target fill | Note |
|---|---|---|
| B2C retail in-store shelf fill | 95-98% | RetailNext and IHL Group cite 96% as the all-channel B2C average. |
| B2C ecom (DTC) | 97-99% | Single-channel inventory pool raises achievable fill rate. |
| B2B grocery wholesale (case fill) | 96-99% | Industry SLA per UNFI / KeHE distributor agreements. |
| Pharmacy dispensing | 99%+ | Daily wholesaler delivery (McKesson, Cardinal) sustains near-perfect fill. |
| Auto parts aftermarket (first-time fill) | 85-92% | Long tail SKUs depress headline; hub-and-spoke recovery in 24h. |
| Apparel DC to store | 92-97% | Cut order during peak weeks accepted; rolled forward to next ship cycle. |
| B2B industrial distribution | 92-96% | Grainger / Fastenal class operators publish in-stock rates near this range. |
Sources: IHL Group out-of-stock research, NRF research, distributor SLAs.
The cost of a percentage point
IHL Group has reported global stockout losses approaching $1.2 trillion annually. The translation into operating math at the store level: every 1 percentage point of fill rate above 95% requires meaningfully more inventory investment, but the marginal stockout cost is large enough that operators generally judge the trade as worth it up to about 98% before diminishing returns set in.
The trade-off curve flattens above 98% because:
- Long-tail SKUs that drive the final 2 percentage points need disproportionate safety stock relative to their sales contribution.
- Slow movers create dead-stock writedown risk that erodes the gross margin protected by the higher fill rate.
- Substitution (vendor swap, alternate brand) recovers some of the lost sale at lower margin cost than holding the inventory.