Expert analysis · reviewed 6 Oct 2026
Average order value: raising it without lowering margin per customer.
Key distinctions
Three conditions before calculating.
Order value is a ratio, not a result
Revenue = customers × orders per customer × average order value. An order value that rises while frequency falls can leave revenue unchanged.
A threshold shifts purchases as much as it creates them
Free delivery or a discount from a given amount encourages customers to group purchases that would have happened separately. The basket grows and the number of orders falls.
Margin per order matters more than the amount
A higher order value obtained through discounts, low-margin products or free delivery can yield less margin than a smaller order.
Method
Reading and managing average order value in four steps
- 01Break down revenue
Track number of customers, orders per customer and average order value together, by cohort, to see which lever is really moving.
- 02Calculate margin per order
Deduct discounts, free delivery, returns and the cost of goods from the order, rather than stopping at the selling price.
- 03Check for consolidated purchases
Compare purchase frequency before and after an action on order value, over a period long enough to cover the purchase cycle.
- 04Test against a control group
Measure the action on an exposed group and a control group, then compare margin per customer per period rather than order value.
An order value that rises, a margin per customer that falls
The same customer before and after free delivery from €60. Each indicator is read next to the others, not in isolation.
| Indicator | Before the offer | After the offer | Change |
|---|---|---|---|
| Orders per customer per year | 5 | 4 | −20% |
| Average order value | €50 | €62 | +24% |
| Revenue per customer | €250 | €248 | −1% |
| Margin per order | €20 | €18.80 | −6% |
| Margin per customer per year | €100 | €75.20 | −25% |
Average order value can only be read together with purchase frequency and margin per order.
Order value up 24% and margin per customer down a quarter
Illustrative example: before free delivery from €60, a customer places 5 orders a year with an average order value of €50 and a margin of 40%. After the offer, they place 4 orders of €62, and free delivery costs €6 per order.
Before = 5 × €50 × 40% = €100 of margin a year. After = 4 × (€62 × 40% − €6) = €75.20 of margin a year. Revenue per customer = €250 before and €248 after.
Average order value rises by 24%, but the customer has only consolidated their purchases: their revenue does not move and their annual margin falls by a quarter. The right indicator was margin per customer per year.
Acceptance conditions
What must be true to act.
- 01
Never present a rise in average order value without the change in purchase frequency over the same period.
- 02
Assess every action on order value by margin per customer per period.
- 03
Include in the cost of a threshold the free delivery given to orders that would have reached it without an incentive.
- 04
Set a free-delivery threshold from the distribution of orders, not from their average.
Limits
What this analysis does not prove.
- The average of orders is sensitive to exceptional orders; the median usefully complements the reading.
- Consolidated purchases can reduce logistics costs and offset part of the margin loss.
- A threshold's effects on acquiring new customers do not show in the order value of existing customers.
- An observation period that is too short confuses consolidated purchases with a lasting rise in spending.
References
Works cited.
- Lewis, Singh & Fay (2006), An Empirical Study of the Impact of Nonlinear Shipping and Handling Fees on Purchase Incidence and Expenditure Decisions (opens in a new tab)
- Lewis (2006), The Effect of Shipping Fees on Customer Acquisition, Customer Retention, and Purchase Quantities (opens in a new tab)
- Bell & Lattin (1998), Shopping Behavior and Consumer Preference for Store Price Format: Why “Large Basket” Shoppers Prefer EDLP (opens in a new tab)