Fulfillment Lexicon

Cost per Order

Cost per Order (CPO) is the total cost to fulfill and ship one customer order.

Topic: Metrics & Unit Economics Entry KPI-051

Why it matters for ecommerce brands

The core unit-economics metric for logistics. Track with and without postage to see where savings come from.

Formula and example

Cost per order = (fulfillment labor or 3PL fees + packaging + postage + storage allocation) ÷ orders shipped

Common questions

What is included in fulfillment cost per order?
Typically pick and pack fees or labor, packaging materials, outbound postage, and a share of storage and receiving costs. Some brands also include returns processing; state which costs you include so comparisons are fair.

Cite this entry

"Cost per Order (CPO)." Fulfillment Lexicon, last reviewed October 16, 2026. https://fulfillment.wiki/glossary/cost-per-order/

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