Free-shipping thresholds and order value: what Baymard, McKinsey and the journals found

The usual logic: set the free-shipping threshold a little above the typical basket, and shoppers add an item to reach it. The sources below give a more careful picture. None tested a Shopify store or an app.

Shoppers rank extra costs first

Baymard Institute reports that 42% of US online shoppers abandoned a cart because they were “just browsing / not ready to buy.” Among the remaining reasons, the top one is “Extra costs too high (shipping, tax, fees)” at 40%. Slow delivery follows at 20%, and 12% could not “see / calculate total order cost up-front.” The shares add up to more than 100%, so shoppers gave more than one reason. Baymard’s page gives no sample size, so treat the numbers as indicative.

In a separate Baymard article, 64% of test users “looked for shipping costs on the product page, before deciding to add a product to the cart.” So the cost should be visible well before the threshold matters.

A low threshold can cost margin

McKinsey notes that “a fast-fashion retailer with a low free-shipping threshold may need to absorb a large number of negative-margin sales.” The same article says fulfilment can be 12 to 20 percent of e-commerce revenue. A threshold is a trade, and the margin side counts.

One natural experiment: more orders, no clear change in basket size

Hirche, Gijsenberg and Bijmolt (University of Groningen) studied a major European online retailer that moved from category-based shipping fees to a single €2.95 fee with free shipping over €20. The data covers 26.21 million orders. This is a working paper, and the retailer changed fees for some products up and for others down.

Where fees fell, daily sales rose by 45.21% and daily orders by 43.58%. Where fees rose, there was no significant effect. On average order value: “no evidence for a significant effect.” The authors had expected smaller orders and could not confirm it. Returns rose slightly, from 30.07% to 30.36% where fees rose and from 52.30% to 54.56% where fees fell, and the abstract says the effect “is not driven by filler purchases.”

One field experiment, one model

Li, Tsekouras and Cheng ran a randomized field experiment with a live online retailer. They report that “unconditional free shipping leads to higher conversion rates, by at least 2.2%, compared to threshold-based free shipping,” and estimate an 18% revenue gain, about €191,419 a year. We read only the abstract, which gives no sample size.

A peer-reviewed model by Li, Sheng and Zhan, for online grocers, finds that when consumers differ enough, the best policy induces some to top up their orders. “Otherwise, a top-up option is unnecessary, and a flat-rate shipping fee policy is optimal.” It is a model, not a test.

What to do this week

• In Shopify admin, check your free-shipping setup. Shopify’s help page says “the minimum purchase amount counts product prices only, and other costs such as taxes are never included.”
• Write down your average order value and your threshold.
• Show the shipping cost before checkout.
• Change one thing at a time and compare orders, order value and returns over at least two full weeks.