Countdown Timer A/B Tests: What 15 Results Show

What counts as a countdown timer

This collection covers sale countdowns in announcement bars and collection banners, "order reserved" timers at checkout, and timers on the product page.

Some tests paired the timer with an offer, social proof or a link, so the timer is not the only change.

The win/loss record

12 wins and 3 losses. Read the wins carefully: Kasper Dolk's test that removed a checkout timer is recorded as a win (+25.61% CVR, +26.18% RPV, est. +€150k/month), which makes it a fourth case where the timer hurt.

12 of the 15 results are Dave Diederen's.

Where timers were tested

• Checkout: 5
• Collection page: 4
• Site-wide (announcement bars and markets): 4
• Product page: 2

Biggest wins: collection banners and announcement bars

Every collection and announcement bar timer here was a Dave Diederen test, and every one won:

• Timer where heatmaps showed focus: +20.67% CVR, +20.65% RPV
• Collection banner turned into a clickable countdown: +$161K revenue, 800+ orders, 55,000 visitors
• Collection banner with social proof, offer and countdown: up to +6% CVR, +6.4% RPV
• Countdown in the collection banner: +1.3% revenue, ~$10K/month
• Announcement bar with a clear offer, timer and link: +$170K+ revenue
• Clickable announcement bar with sale timer: +3.03% CVR, +4.32% RPV
• Timer instead of a free-gift threshold callout: +1.59% CVR, +2.82% RPV

Checkout: mixed

Dave Diederen's checkout timer won across four tests (+3.16% RPV, +$139,029/month est.), and an "order reserved" timer for US brands gained +9.50% CVR but cut AOV by 4.26%.

Kasper Dolk's trust and urgency elements on a Plus checkout added $33,435.

Against that, Dave's other checkout timer test lost (-5.4% CVR, -7.1% RPV), and Kasper's removal test won by +25.61% CVR.

A

→

B

+20.65% revenue per visitor

Added a countdown timer where heatmaps showed shoppers were focused

Collection pageCountdown timers@DaveDiederen

A

→

B

+3.16% revenue per visitor

Added a countdown timer to checkout

CheckoutCountdown timers@DaveDiederen

A

→

B

+4.83% revenue per visitor

Added a checkout countdown timer (order reserved) for US brands

CheckoutCountdown timers@DaveDiederen

A

→

B

Revenue per visitor +26.18%

Remove the countdown timer from checkout

CheckoutCountdown timers@kasper_dolk

A

→

B

-35.61% revenue per visitor

Added a countdown timer for a non-US (European) market

Site-wideCountdown timers@DaveDiederen

A

→

B

+~10% conversion rate (low-priced brand)

Added a countdown timer, tested across several brands

Product pageCountdown timers@Rubendgrf

Tests that lost

• Dave Diederen, European market: -17.35% CVR, -35.61% RPV, -22.09% AOV across 20+ brands
• Ruben, several brands: about +10% CVR on a low-priced brand, no clear lift on a high-priced brand, -9% CVR on another
• Dave Diederen, checkout: -7.1% RPV

The losses point to audience and price: the US-brand checkout timer won while the European one lost badly, and Ruben's result varied by brand price.

Product page

Dave's "Selling Out Fast" banner with a % sold bar and countdown gained +8.04% CVR.

Ruben's mixed result is the other product page test.

How to add a countdown timer on Shopify

Announcement bar and banner timers come from theme sections or a timer app; link the bar to the sale collection, as the winning tests did.

Checkout timers need Shopify Plus checkout extensibility. Only run a timer when there is a real deadline.

How to test it on your store

Hypothesis: a timer for a real sale in the collection banner will raise revenue per visitor.

Split results by country and price point, given the European loss.

Track AOV, which fell in two of the checkout wins, and size the test with the sample size calculator.