Free Shipping Threshold A/B Tests: What 13 Results Show

All 13 measured free shipping threshold tests in this archive were recorded as wins, and the most useful pattern runs against common advice: raising the threshold or charging a shipping fee beat the free shipping control in seven of them.

Dave Diederen's $9.49 shipping fee test gained +43.81% revenue per visitor, and raising the threshold to $165 gained +6.27% profit per visitor. The other wins came from clearer threshold messaging and second rewards above the threshold.

11 of the 13 results come from Dave Diederen, so read the pattern as strong evidence from one practitioner's stores rather than a universal rule. The grid lists every result and idea.

measured results
0–0won vs lost or flat
ideas to test

What counts as a free shipping threshold test

This collection covers the threshold amount itself, removing it in favour of a fee, the shipping price, the copy that tells shoppers they qualify, and tiered cart rewards that start with free shipping.

The win/loss record

13 wins, no losses or flat results recorded. One result is close to a loss for threshold messaging: in Dave Diederen's announcement bar test, a countdown timer beat a free-gift threshold callout by +1.59% conversion rate and +2.82% revenue per visitor.

Where the tests ran

  • Cart: 4
  • Site-wide: 4
  • Checkout: 3
  • Product page: 2

Biggest wins: charging more

Dave Diederen ran seven tests that raised the price of shipping or the bar for free shipping:

In several of these, conversion rate went up as well as revenue, so a fee did not scare buyers away in these stores. The posts don't say why, so treat the mechanism as unknown.

Wins from threshold messaging

Wins from rewards above the threshold

Oliver Kenyon's tiered cart rewards (free shipping, then bonus items) added +$57k per month. Kasper Dolk's second-threshold mystery gift added +€30,578 revenue at 99% confidence across 9,868 visitors.

Design patterns that won

  • State the threshold next to Add to Cart, not only in the cart.
  • Celebrate when the shopper qualifies.
  • Add a second reward once free shipping is unlocked.
  • Test the threshold above your average order value, or a modest fee.

Ideas not yet measured

The idea list leans heavily on cart progress bars with stacked milestones, from Kasper Dolk, Milos and Dave Diederen. Elevate A/B Testing suggests raising the threshold above average order value, which Dave's $165 test supports.

How to change free shipping thresholds on Shopify

The threshold is a shipping rate condition in Shopify's shipping settings. Progress bars and unlock messages come from the theme's cart drawer or a cart app. Testing different thresholds or fees needs a tool that can split shipping rates between visitors.

How to test it on your store

Hypothesis: a threshold just above average order value, or a small flat fee, will raise profit per visitor without hurting conversion. Measure profit per visitor, not conversion rate alone. Size it with the sample size calculator and read price testing first.

Questions

Does a free shipping threshold increase AOV?

It can. Dave Diederen's tests raised AOV in several cases, such as +16.54% with a $9.49 fee. Raising the threshold to $165 left AOV flat but lifted profit per visitor by +6.27% and conversion rate by +6.29%.

Should I remove free shipping and charge a fee?

In two of Dave Diederen's tests, removing the threshold and charging for shipping won (+9.17% and +7.90% revenue per visitor). These are from one practitioner's stores, so test it before switching.

What should the free shipping threshold be?

The ideas here suggest setting it just above your average order value. The measured evidence is Dave Diederen's test raising the threshold to $165, which won on profit per visitor.