Cost Per Order Calculator
Calculate the total fully loaded variable cost incurred on every shipped customer order, combining product COGS, postage, labor, payment fees, and ad CAC.
Per-Order Cost Components
Cost Per Order (CPO) Formula
CPO = Product COGS + Packaging + Postage + Pick & Pack Labor + Gateway Fees + Ad CAC + Return Reserve- Product COGS: Landed manufacturing cost of the merchandise inside the package.
- Direct Fulfillment: Packaging supplies, carrier postage, and warehouse handling labor.
- Merchant Processing: Credit card gateway transaction fees.
- Ad CAC: Customer acquisition cost allocated per order to acquire the customer.
- Return Reserve: Allocated financial loss from damaged returns and restocking.
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Reflects variable cost per order, excluding fixed administrative overhead.
- Ad CAC represents blended acquisition cost across new and returning customers.
Frequently Asked Questions
Why is Cost Per Order (CPO) more important than product COGS alone?
Many merchants focus solely on their 70% product margin, forgetting that shipping, packaging, ad spend, and merchant fees eat up another 40% of the sale. CPO gives you the true all-in cost.
How does high AOV help reduce Cost Per Order as a percentage?
Fixed costs like box, tape, label, and base postage remain virtually identical whether a customer buys one $30 shirt or three shirts for $90, making high-AOV orders much more profitable.
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