Freezing food in Switzerland: what can you freeze, and how long does it keep?

A freezer is not a storage unit. It is a pricing tool. Buy a product on Aktion, freeze it, and you pay the discounted price for something you eat weeks later. Swiss retailers do it themselves: according to Bilanz (13 April 2026), Migros and Coop freeze meat shortly before its use-by date and sell it from the freezer at 50 percent off, for a maximum of 90 days. Migros reports a sell-through rate of nearly 100 percent on that frozen meat. If the retailer runs that maths, so can you.

Which leaves three questions: what actually freezes well, how long does it really keep, and at what point does the electricity eat the saving? Below are the storage durations by food group from named Swiss sources, the rules set by the food-safety authorities, and the arithmetic.

Sources checked regularly. Meat storage durations: Proviande (schweizerfleisch.ch, "Fleisch tiefkühlen"). Vegetables, fruit, bread, dairy and cooked dishes: the Betty Bossi guide "Lebensmittel einfrieren". Legal and hygiene rules: Kantonales Labor Zürich, information sheet "Haltbarkeit von Lebensmitteln" MD-00112 version 02 (valid from 28.01.2025), Canton of Zurich "Umgang mit Lebensmitteln", Federal Food Safety and Veterinary Office BLV (hygiene recommendations). The 90-day rule: Stiftung für Konsumentenschutz (updated 17.02.2026) and foodwaste.ch. Food-waste figures: savefood.ch (calculation Beretta & Hellweg 2019). Promotion cycle: Migros and Denner press releases of 26 January 2026. Meat promotion share: BLW meat market report via foodaktuell.ch (18.11.2021). Coop's move to Thursday: watson.ch (15.01.2025) and 20 Minuten (16.01.2025). Freezer running costs: EKZ (2021). Last checked: July 2026.

What can you freeze, and what should you not?

Good candidates have firm structure and little free water: raw meat, chicken, fish fillets, blanched vegetables, berries and stone fruit, bread and croissants, butter, semi-hard and grated cheese, herbs, soups, sauces and cooked dishes. The Kantonales Labor Zürich information sheet explicitly names "frisches Fleisch, Reibkäse und Fleischzubereitungen" (fresh meat, grated cheese and meat preparations) as products you may freeze before the use-by date runs out.

The same sheet rules out "genussfertige Salate und Sandwichs" — ready-to-eat salads and sandwiches. The Betty Bossi guide extends the list: high-water vegetables such as cucumber, tomato, asparagus, courgette, leafy salads, radishes and melon turn mushy and spongy after thawing; raw potatoes go sweet and mealy; high-water dairy such as yoghurt, milk, crème fraîche, quark and sour cream separates on thawing; whole eggs in the shell cannot be frozen, though separated whites and yolks freeze well; deep-fried pastry loses its crispness; tinned food should stay out of the freezer because the metal can expand and split; and raw vegetables eaten raw lose their crisp texture once frozen.

Retailers draw the same line. Per Bilanz, Migros does not freeze meat on the bone, offal, fish, seafood or sliced deli meats; Coop additionally rules out marinated meat. Copy that pattern and you will rarely go wrong: simple ingredient yes, processed convenience product with sauce, salad or marinade no.

How long does frozen food keep?

Two separate things. The durations below concern quality — taste, texture, colour, freezer burn. What concerns safety is the temperature and the thawing rules. The Canton of Zurich requires frozen goods to be held at "–18 °C or colder"; briefly, during transport or when the appliance defrosts, the temperature in the product's outer layers must not exceed –15 °C. The table values come from two named Swiss sources, not from any measurement of ours.

The 90-day rule is the single most useful line on this page. The Swiss consumer-protection foundation puts it this way: packaged meat, fish and grated cheese, plus prepared products labelled "zu verbrauchen bis" (use by), can be eaten up to 90 days longer if they are frozen before that date expires. foodwaste.ch adds, for fresh meat: do not refreeze after thawing, consume within 24 hours, and the freezer compartment of an ordinary fridge is sufficient for the purpose. The same source adds that thawed fresh meat should then be cooked or fried right through.

Best-before dates follow a different logic from use-by dates. Drawing on ZHAW research for the food-safety authorities, foodwaste.ch lists how long products typically remain good past the best-before date: +360 days for pasta, rice, tea and coffee, +120 days for oils, fats and muesli, +90 days for frozen products, +30 days for UHT milk, hard cheese and snacks, and +6 days for raw eggs, cakes and pastries.

Why the freezer beats the weekly price cycle

Swiss promotions are rarely shallow. Retail consultant Marco Fuhrer (Fuhrer & Hotz) told the Aargauer Zeitung (27 April 2019) that 20 percent is the absolute minimum needed to attract customers. There is plenty of room above that — and on meat the promotional price is now the norm. According to the Federal Office for Agriculture's meat market report, cited by foodaktuell.ch (18 November 2021), more than half of all fresh meat sold in the July 2020 to June 2021 period went out as promotional goods; measured by revenue the share was 47 percent.

That is exactly where the freezer earns its keep. Meat, chicken and fish fillets carry the deepest promotional discounts and, at the same time, some of the longest freezer durations — up to eight months for roasts and whole chicken. A one-week Aktion becomes a price that lasts half a year. Which chain discounts meat when is covered in meat deals Switzerland; the price levels sit in the cheapest-meat comparison.

For vegetables and berries, compare against the ready-made frozen pack before you freeze your own. On quality the Betty Bossi guide gives both routes the same range: blanched vegetables and berries, apricots and plums keep 8 to 12 months whether they were frozen industrially or in your own chest. The difference is not shelf life but labour and control. The industrial pack arrives trimmed, washed and portioned; freezing it yourself lets you choose variety, origin and portion size, and it pays off above all when fresh produce is cheap in peak season or on Aktion. There is no verdict in advance, because both sides move week by week — if you want the sum, compare on the day you buy. Current levels are in the frozen-food price comparison.

And the cost of not freezing: savefood.ch reports that at the end of the food chain, in households, around 90 kilograms of edible food is lost per person per year, burdening the household budget by over CHF 600 per person per year (calculation Beretta & Hellweg 2019). In total, per the same source, Swiss food consumption generates 2.8 million tonnes of food waste a year across every stage of the food chain, in Switzerland and abroad; 778,000 tonnes of that arise in households.

What does a freezer cost to run?

The honest counter-calculation: the appliance runs around the clock. In 2021 EKZ costed a free-standing 250-litre chest freezer as follows — efficiency class A+++ about 130 kWh per year, which at 28.15 centimes per kWh works out to CHF 36.60 a year; A++ up to 194 kWh, roughly CHF 54.60; A+ around 260 kWh, CHF 73.20. Electricity prices have moved since, but the order of magnitude holds: roughly one coffee a month for an efficient appliance.

So the sum is quick. Fill a 250-litre freezer with meat bought at half price and a few kilos of chicken cover the year's electricity. Run a half-empty freezer full of leftovers nobody eats and you are paying for nothing. The freezer should be full and moving, not an archive.

From Aktion to freezer: the weekly workflow

The timing has shifted. Per the Migros press release of 26 January 2026, from 5 February 2026 Migros promotions start on Thursday and run until the Wednesday of the following week; Denner moved its promotion start to Thursday on the same date (previously Tuesday to Monday). Coop switched to this rhythm about a year earlier: its running promotions were extended to 22 January 2025, and Thursday applied from then on (watson.ch, 20 Minuten). Plan on Tuesday and you are two days early. The mechanics are in how Swiss Aktionen work and the promotion calendar.

1. Wednesday evening or Thursday: check the promotions. The current offers from seven chains in one place, filtered to your canton.
2. Set price alerts on the freezer-friendly staples you actually buy. Chicken, minced meat, butter, berries, bread. When one of them goes on Aktion anywhere, Rappn tells you, and you stock up instead of paying full price. Rappn compares the offers neutrally, with no commercial agreement with any retailer.
3. Portion on shopping day, not on cooking day. Small, flat portions freeze through faster — precisely what the Canton of Zurich recommends, on the stated grounds that rapid freezing reduces quality losses, for instance through crystallisation of free water. Warm food should be cooled down as far as possible first.
4. Label with the freezing date. The Canton of Zurich requires it for commercial storage; at home it is the difference between a stock and a guessing game.
5. Blanch vegetables before freezing. Briefly into boiling water, then straight into cold — that is what preserves colour, flavour and texture.
6. Bulk packs only if you have the space. The arithmetic of buying big is in the bulk-buying guide; the cooking side sits in meal-prep shopping.

What do the authorities say about freezing and thawing?

Four rules, all from Swiss food-safety authorities rather than from us. First: store frozen goods at –18 °C or colder (Canton of Zurich). Second: never refreeze thawed food — the BLV states it plainly, and the Kantonales Labor Zürich explains why, noting that every freeze-thaw cycle damages the structure of the food and encourages the growth of potentially harmful bacteria. Third: thaw in the fridge at a maximum of 5 °C, because thawing at room temperature warms the outer layers and favours bacterial growth (Kantonales Labor Zürich). Fourth: put chilled and frozen products into the fridge or freezer immediately after shopping (BLV).

Retailers carry an extra labelling duty: products frozen to extend shelf life must, per the Kantonales Labor Zürich, be marked with the freezing date and a new best-before date, plus a note that they must not be refrozen after thawing. Those are exactly the labels on the half-price meat freezer at Migros and Coop — per Bilanz, Migros marks the packs with a green label and Coop with a light-blue label carrying a snowflake, under its "Verwenden statt Verschwenden" banner.

Is freezing worth it? It depends

It depends on what you freeze and whether you actually eat it. For meat, chicken, butter, bread, berries and blanched vegetables, the freezer is the cheapest saving instrument in the household: one promotional week becomes months of that price. For high-water vegetables, cream-based products, ready salads and marinated goods it is not worth it — you lose quality and end up buying twice. And once the freezer becomes a final resting place, you lose both the electricity and the food.

The practical entry point is a single step: set price alerts on the five freezer-friendly products your household buys most often, then look at the current offers on Thursday. Whatever is discounted goes into the freezer; whatever is not waits for the next round. No chain is permanently the cheapest — but every one of them takes its turn.