Sticky Cart: How Persistent Visibility Boosts Restaurant Menu Conversions

A 28-table Mediterranean restaurant in Istanbul Şişli added a bottom sticky cart bar to its QR menu and watched checkout dropoff fall from 11% to 4% within a single week. The mechanic is simple — guests scroll through categories, and when their cart stays visible they don't forget what they added.

The Behavioral Logic of Sticky Cart

Baymard Institute's 2024 mobile checkout study shows a persistent bottom cart bar raises e-commerce conversion by an average of 18%. In restaurant menus the lift is even stronger because users hop across 6-8 categories and would otherwise lose track of what is in their order.

The sticky bar displays three signals on one line: total amount, item count, and a "Go to Cart" button. As long as that trio stays visible, the diner keeps a sense of "how close am I to finishing?" When the bar disappears, the cart effectively disappears with it.

Design Components That Work

A good sticky bar carries enough contrast to be noticed without dominating. Its background should differ clearly from the menu surface but never feel aggressive. Height of 48-56 pixels is ideal; taller bars steal content space, shorter ones fail as touch targets.

• Format: "$24.50 • 3 items • View Cart" — left-to-right scan order
• Animation: 200ms pulse on add — informs without startling
• Z-index: just below modals and toasts so it never blocks active dialogs

A/B Findings and Pitfalls

A 6-week A/B test across thMenu Pro+ restaurants found that diners exposed to the sticky bar built 23% larger average baskets because returning to the cart required no scroll-back. The flip side: a too-loud bar can feel pushy, especially in premium concepts where ambient pace matters.

The fix is empty-state suppression: keep the bar hidden until the first item is added, then slide it up gently. This pattern preserves the premium feel while capturing the full conversion uplift.

FAQ

Does sticky cart still help on short menus? Under 20 items the lift is around 5%; on 50+ item menus the effect is dramatic because scroll distance is much longer.

Does it crowd mobile screens? At 48-56px it consumes about 6% of viewport — negligible space cost for a measurable conversion gain.

How do I enable it in thMenu? Pro+ plans expose Settings → Menu Display → "Sticky Cart Bar" toggle; responsive behavior is automatic.

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