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Financial research concept

Auto Parts Accounts Payable to Inventory

measures how much auto-parts inventory is offset by supplier payables, showing the role of vendor financing in working-capital economics.

By Lee BaileyPublished Sep 29, 2026
Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date
Sep 29, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context
10 connected conceptsPart of the reviewed Auto Parts Retail Operating Economics; issuer definitions remain distinct where disclosed.
Company examples
1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.
  1. A ratio above 100% can make inventory a source of financing
  2. Vendor funding is not the same as low inventory intensity
  3. Part of the Auto Parts Retail Operating Economics
  4. See It in Company Research
  5. Continue Research

Auto parts accounts payable to inventory compares supplier payables with the carrying value of inventory.

O'Reilly Automotive reported an accounts-payable-to-inventory ratio of 123.7% at June 30, 2026, versus 127.0% a year earlier.

A ratio above 100% can make inventory a source of financing

O'Reilly defines the ratio as accounts payable divided by inventory. When the percentage is above 100%, supplier payables exceed the reported inventory balance.

That can reduce the amount of shareholder or debt capital tied up in stocking parts, especially when paired with stable inventory turnover.

Vendor funding is not the same as low inventory intensity

A high payables ratio does not mean the company carries little inventory. O'Reilly also reported $892K of inventory per store at June 30, 2026.

Supplier terms, payment timing, purchasing scale, inventory mix, and accounting cutoffs can all affect the ratio. Investors should therefore treat it as a working-capital measure, not as a standalone inventory-quality score.

Primary source: O'Reilly Automotive Q2 2026 earnings release.

Part of the Auto Parts Retail Operating Economics

Connect DIY and professional demand with commercial-service coverage, hub and distribution-center parts availability, inventory intensity and turnover, vendor funding, and store-level sales productivity.

Browse the full operating model in Company Analysis →
Where this concept fits
  • Inventory intensity, turnover, and vendor fundingCurrent relationship
    Inventory per store shows local working-capital intensity, inventory turnover shows how quickly cost of goods sold cycles through average inventory, and accounts payable to inventory shows how much supplier credit offsets the inventory balance. Together they frame the tradeoff between parts availability and capital efficiency.
    Accounts Payable to InventoryCurrent conceptInventory per StoreInventory Turnover
  • DIY, professional, and store productivity
    DIY sales and professional sales separate the two main customer jobs served by the auto-parts store network. Sales per average store and sales per average square foot show how that customer mix converts into unit and space productivity without replacing comparable-store growth.
    DIY SalesProfessional SalesSales per Average Square FootSales per Average Store
  • Commercial coverage and parts-availability network
    Commercial program count shows how much of the store base can directly serve professional accounts, while hub stores and distribution centers position broader assortments at different points in the replenishment network. The counts are architecture inputs, not standardized service-quality scores.
    Commercial Program CountDistribution Center CountHub Store Count

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Compare vendor-funded inventory

Compare how much reported inventory is offset by accounts payable while preserving supplier terms, inventory mix, and issuer calculation methods.

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