Shrinkflation in Switzerland: how to spot the hidden price rise

Shrinkflation is the quiet price rise that hides in plain sight. The packet looks the same, the shelf price looks the same, but there is less inside than there used to be: fewer grams of chocolate, a smaller tub of ice cream, one biscuit fewer in the roll. Because the headline price has not moved, most shoppers never notice, and that is exactly the point. The good news is that Switzerland gives you a built-in defence. By law, the unit price (the price per 100g, per kilo or per litre) has to sit next to the shelf price on measurable packaged goods, and that single number is the honest way to catch a shrinking pack. This guide explains how shrinkflation works, which product categories tend to be most exposed, what the Swiss consumer bodies are doing about it, and how tracking the unit price over time turns an invisible trick into something you can see.

Sources checked May 2026: the Stiftung fuer Konsumentenschutz (SKS) and its shrinkflation reporting call; the Federation romande des consommateurs (FRC); the Associazione consumatrici e consumatori della Svizzera italiana (ACSI) and its magazine La borsa della spesa; Swiss consumer journalism from Kassensturz / Espresso (SRF), K-Tipp and Bon a Savoir; and the Federal Price Indication Ordinance (Preisbekanntgabeverordnung PBV / Ordonnance sur l'indication des prix OIP) on mandatory unit-price labelling. Specific products, sizes and prices change over time, so this guide explains how to spot shrinkflation rather than quoting figures that go stale; track live unit prices in the Rappn app.

Rappn is the only neutral grocery price comparison app in Switzerland, with no commercial agreements with any retailer. We are not paid by Coop, Migros, Denner, Aldi, Lidl, Aligro or Otto's to rank them, and nothing below is sponsored.

What shrinkflation actually is (and how it differs from a fake discount)

Shrinkflation, called Mogelpackung in German and reduflation in French, is when the quantity in a pack shrinks while the price stays the same or barely moves. The result is a higher price per unit of weight or volume, even though the number on the shelf label looks unchanged. It is different from a misleading promotion: a fake discount plays games with the reference price and the word "sale", while shrinkflation plays games with the contents. For the promotion side of the story, see our guide to spotting fake discounts in Switzerland. This page is about the grams, not the percentage-off sticker.

Crucially, shrinkflation is generally legal in Switzerland. A manufacturer that puts less in the box is not lying as long as the new weight and the price are correctly declared on the pack. The information is all there. The catch is that almost nobody recomputes the price per 100g in their head while shopping, which is why a smaller pack at the old price can pass unnoticed for months.

The one number that exposes it: the unit price

Switzerland has an unusually useful rule on your side. Under the federal Price Indication Ordinance, most measurable packaged goods must show not just the shelf price but also the unit price, the price per kilo, per litre or per 100g, right next to it. That comparison figure is the antidote to shrinkflation. If a pack quietly drops from a larger size to a smaller one at the same shelf price, the unit price goes up, and the unit price is printed in black and white. Train yourself to read the small "per 100g" or "per litre" line rather than the big number, and a shrinking pack stops being invisible.

Which categories tend to be most exposed

Shrinkflation can appear anywhere, but consumer bodies and the Swiss press tend to flag the same kinds of products: packaged goods where a small change in fill is easy to disguise. Here is a qualitative map of where to keep your eyes open. It does not say any product has shrunk; it shows where the format makes a quiet change easiest to slip past you.

What the Swiss consumer bodies are doing

The Swiss consumer organisations treat shrinkflation as a transparency issue rather than a pricing crime, because it is legal. The Stiftung fuer Konsumentenschutz (SKS) in the German-speaking region, the Federation romande des consommateurs (FRC) in the French-speaking region and the ACSI in Italian-speaking Switzerland have all raised the topic and, at various points, invited the public to report suspected cases so the practice can be documented. Consumer-affairs journalism from Kassensturz and K-Tipp in German, Bon a Savoir and A Bon Entendeur in French, and La borsa della spesa in Italian regularly investigates examples and asks manufacturers and retailers to explain. Retailers have generally responded that they prefer to communicate genuine, unavoidable price changes openly and that they do not pursue this practice on their own private-label lines, while pointing out that branded products are decided by their makers. Switzerland has not, so far, introduced a specific labelling law forcing a "this pack got smaller" notice, which is why your best protection remains the unit price already on the shelf.

How a price-comparison app turns an invisible trick into a visible one

A single shelf visit only shows you today's pack. Shrinkflation is a change over time, so the way to catch it is to watch the unit price across weeks, not just glance at the shelf price once. That is exactly what Rappn is built to do. You search a product and see the unit price (per kilo, per litre or per 100g) next to the shelf price across Coop, Migros, Denner, Aldi, Lidl, Otto's and Aligro at once, which is the only honest way to compare two different pack sizes of the same thing. You can set an alert on the items you buy regularly, so if the effective price per 100g climbs you are told, even when the shelf price has not budged. Everything is filtered to your canton, and the app is free with no commercial deal with any retailer. If your wider goal is simply the lowest total bill, our guide to the cheapest supermarket in Switzerland and the grocery price comparison app for Switzerland show how to put the whole shop side by side.

Five habits that beat shrinkflation

You do not need to memorise every pack size in the country. A few habits do most of the work. Read the unit price, not the shelf price. Be a little more alert in the high-exposure categories above. Compare like for like across chains rather than trusting one shelf. Track the products you buy most, since that is where a quiet change costs you the most over a year. And report anything that looks off to the consumer body in your region, because the more cases are documented, the harder the practice is to hide. For buying in larger formats, where the price per unit is often clearer, see our guide to bulk buying in Switzerland.

Last reviewed: May 2026. Products, pack sizes and prices change over time; this guide is updated as the Swiss retail landscape shifts.