Avoid impulse buys at the supermarket: save with a plan and a list
Impulse buys are the quiet leak in a grocery budget. The most effective defence: shop with a list (demonstrably cuts items and spending), do not shop hungry and know the temptation zones at the end-caps and checkout. How big the impulse share is depends on the source, from around 20 percent in studies to the disputed 60 to 70 percent from retail estimates.
Updated regularly. Impulse buys are the quiet leak in a grocery budget: things that were not on the list yet end up in the trolley anyway. How big the share is depends on the source, from around 20 percent of purchases in controlled studies to the often-quoted 60 to 70 percent from retail estimates. The most effective defence is unglamorous: shop with a plan and a list, and not while hungry.
Rappn is the only neutral grocery price comparison app in Switzerland, with no commercial agreement with any retailer. Migros, Coop, Aldi, Lidl, Denner, Aligro and Otto's do not pay us to rank them, and nothing below is sponsored.
How do I avoid impulse buys at the supermarket?
With three habits, all backed by studies. First: shop with a list. People who write a list before shopping demonstrably buy fewer items and spend less (Davydenko and Peetz, peer-reviewed). The list is the decision made in advance that protects you from spontaneous add-ons in the aisle. Second: do not shop hungry. In a field study, hungry shoppers spent noticeably more, even on non-food items. Third: know the temptation zones. End-caps (the promo head of the aisle) and the checkout zone are built for the spontaneous grab. Knowing that, you reach more deliberately. On the share: controlled research finds genuine impulse buying at around 20 percent of purchases, while more than 60 percent of trips involve no impulse buy at all. The popular 60 to 70 percent figure comes from retail estimates and is disputed.
| Defence | Why it works | Evidence |
|---|---|---|
| Write a shopping list | fewer items, less spent | Davydenko and Peetz (study) |
| Do not shop hungry | hunger raises spending | field study |
| Avoid the temptation zones | end-caps and checkout are traps | retail practice |
Why a list in the app beats one on paper
A paper list disciplines; a list in the app disciplines and does the maths too. In Rappn you write your shopping list and immediately see, per product, where it is cheapest this week across every chain. That replaces the spontaneous grab with a deliberate choice: you buy what you planned, and where it costs least. One caveat: the studies cited are from abroad and the lab, and there is no Swiss figure for the impulse-buy share. But the mechanism, plan beats impulse, is universal.
Set up your weekly shop as a list in Rappn, tick it off in the store and let it show you the cheapest route. More levers are in the how to save on groceries guide, and the stores' hidden tricks are explained in supermarket price traps.
Sources checked: .
This is Rappn's shopping list: write your basket in advance and see per item where it is cheapest, so you buy what you planned instead of what tempts you. Tap around to try it.
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Frequently Asked Questions
How many supermarket purchases are impulse buys?
It depends on the source. Controlled studies find genuine impulse buying at around 20 percent of purchases, with more than 60 percent of trips involving no impulse buy at all. The often-quoted 60 to 70 percent comes from retail estimates and is disputed. There is no Swiss figure for it.
Does a shopping list really help you save?
Yes. In peer-reviewed experiments, people with a pre-written list bought fewer items and spent less. The list is the decision made in advance that protects you from spontaneous add-ons in the aisle.
Why should I not shop hungry?
Because hunger raises spending. In a field study, hungry shoppers spent noticeably more, even on non-food items. Eat something before shopping and you make more level-headed decisions.
Where do most impulse buys happen in the store?
At the end-caps (promo heads of the aisles) and in the checkout zone. These spots are built for the spontaneous grab. Knowing them, you reach more deliberately and are more likely to stick to your list.