Inventory Turnover › Auto Parts
Auto Parts Retail Inventory Turnover Benchmarks 2026
The three big aftermarket auto-parts retailers (AutoZone, OReilly, Advance) all run 1.4x to 1.7x inventory turnover. This is among the lowest of any retail sector and is intentional. SKU depth, not turnover speed, is the operating moat.
Named retailer 10-K data
| Retailer | Fiscal Year | Turnover | COGS | Avg Inventory |
|---|---|---|---|---|
| AutoZone(AZO) | FY24 (ended Aug 2024) | 1.4x | $8.92B | $6.41B |
| OReilly Automotive(ORLY) | FY24 (ended Dec 2024) | 1.7x | $8.91B | $5.18B |
| Advance Auto Parts(AAP) | FY24 (ended Dec 2024) | 1.6x | $6.83B | $4.21B |
Per-retailer notes
AutoZone (AZO)
1.4x turnoverLargest US aftermarket auto parts retailer. Massive SKU depth (200K+ per hub store) sustains a structurally low 1.4x turnover; reliability of finding the part is the value proposition, not turnover.
Source: AutoZone 10-K, fiscal 2024
OReilly Automotive (ORLY)
1.7x turnoverDIY plus DIFM (do-it-for-me commercial) dual model. Pro mix raises turnover slightly above DIY-only peers.
Advance Auto Parts (AAP)
1.6x turnoverMulti-banner (Advance, Carquest, Worldpac). Operating turnaround in progress; turnover sits between AutoZone and OReilly.
Why intentionally slow turnover makes sense here
An aftermarket auto-parts retailer competes on first-time-in-stock rate. If a customer walks in needing a specific brake rotor for a 2012 Honda Civic and the part is not in stock, they buy from a competitor. Probably forever. The retailers therefore deliberately carry the long tail of SKUs at low velocity:
- A typical hub store carries 100K-200K SKUs. Most turn fewer than 2x per year.
- A small share of fast-movers (oil, filters, wipers) turn 10-20x; they subsidise the slow-moving tail.
- Hub-and-spoke logistics ship slow-movers from regional DCs within hours, reducing the need to stock everything in every store.
The operating economics work because gross margins are 50%+, opex per store is low, and the trade area is captive (drivers who need a part now will not wait two days for Amazon delivery).
Related
Inventory Turnover (parent)
Cross-sector benchmarks and formula.
Home Improvement
Home Depot, Lowes, Floor & Decor.
Jewelry Turnover
Signet Jewelers, Tiffany context.
Fill Rate Benchmarks
First-time-in-stock is the auto-parts KPI.
GMROI
High-margin slow-turn unit economics.
Carrying Cost
20-30% baseline; auto parts at low end.