Talk to a humanProduct pages got an announcement bar warning shoppers that stock was running low. The urgency message hurt sales, and testing showed the cost.
A Low-Stock Announcement Bar on Product Pages Cuts Conversion Rate 17.5%
Goal
Conversion rate
Result
-17.5% Conversion rate
Category
Banner
Outcome
Loss Prevented
Before
After
If we show a prominent low-stock announcement bar, then conversion rate will increase because shoppers will feel urgency to buy before the item sells out.
What We Changed
- Added an announcement bar on product pages that tells shoppers stock is low.
- Designed the bar to stand out on mobile screens.
The Results
How the new version compared with the original, across all devices.
-17.5%
Conversion rate
-11.3%
Revenue per visitor
-18.5%
Orders
Key Learnings
- Urgency messaging backfired: conversion rate fell 17.5% and orders 18.5%.
- The original had a 93.8% probability of performing better after 6 days.
- The sample was small at 5,161 visitors, but conversion rate fell on both mobile and desktop.
- Average order value rose 7.4%, but not enough to offset fewer orders.
Detailed results breakdown
Conversion rate
-17.5%
Revenue per visitor
-11.3%
Orders
-18.5%
Average order value
+7.4%
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