Countdown Timer Tests on Checkout: 9 Examples, 5 Results

Why countdown timers matter on the checkout

By checkout the shopper has already decided to buy.

A timer there can push a hesitant buyer to finish, or it can make a ready buyer feel rushed at the point of payment.

In Dave Diederen's words after a loss, checkout should feel secure, predictable and frictionless, not stressful.

Measured results

Adding a timer: won

Dave Diederen's "order reserved" timer for US brands won +9.50% conversion rate and +4.83% revenue per visitor, with AOV down -4.26%.

A second test won +5.39% conversion rate and +3.49% revenue per visitor.

Dave Diederen's explanation for the AOV dip: urgency cuts short the "add one more thing" habit.

In October 2026, Dave Diederen reported another checkout timer win: +2.99% conversion rate and +3.16% revenue per visitor (+$139,029/month est.), with wins across four separate tests (+3.8%, +3.2%, +5.6% RPV). AOV was flat to slightly down.

Kasper Dolk added trust and urgency elements to a Shopify Plus checkout, including a timer, Trustpilot widgets and low-stock notices.

Kasper Dolk reported +$33,435 while the test was still running, and the timer's own share is unknown.

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

+$33,435

Add trust and urgency elements to the Plus checkout

CheckoutReviews & star ratings@kasper_dolk

A

→

B

-7.1% revenue per visitor

Added a countdown timer to checkout

CheckoutCountdown timers@DaveDiederen

Losing or flat tests

In July 2026 Dave Diederen's checkout timer lost: -5.4% conversion rate, -7.1% revenue per visitor and -1.8% AOV.

Dave Diederen said the same pattern had shown up across several brands, and suggested the timer may trigger questions like "Why are they rushing me?"

Kasper Dolk's removal test is the largest result here.

A post-purchase survey said the timer felt like too much pressure for a Dutch audience.

Hiding it won +25.61% conversion rate, +26.18% revenue per visitor and an estimated +€150k/month.

Both practitioners who saw losses gave the same advice: move urgency earlier, to the product page or cart.

Untested ideas

• Dave Diederen suggests a 10-minute checkout countdown through a custom app (Shopify Plus required).
• Dave Diederen also suggests pairing an order-reserved timer with a "free shipping reached" message, USPs, reviews and objection FAQs beside the order summary.
• Kasper Dolk suggests a "total savings" block paired with a limited-time timer.
• Kasper Dolk suggests a custom native-feeling checkout with a timer, faces for trust and objection handling, in place of a plain Stripe checkout.

Placement and design patterns that won

• Frame the timer as a reservation ("order reserved"), not a threat.
• Pair urgency with trust signals rather than running it alone.
• Check the audience: the US results won, the Dutch result won only once the timer was removed.
• Watch AOV, which dipped in most winning versions.

How to test it

Run it as a clean A/B on checkout only, measure revenue per visitor and AOV, and split by country if you sell to several markets.

Use the sample size calculator first, since checkout traffic is smaller than product page traffic.

Related tests elsewhere on the store

See all countdown timer tests, checkout urgency tests and product page urgency tests.