Sharing Groceries in a WG: How to Split & Save

Yes. A WG that pools its grocery money and shops together almost always spends less per person than flatmates buying separately. The savings come from splitting bulk staples, cooking shared meals and wasting less food. The real catch is fairness: without a clear, agreed system, resentment ends up costing more than the francs ever did.

In a typical four-person WG, moving from four separate shops to a shared system for staples and three or four common dinners a week trims each flatmate's food bill by roughly CHF 50–90 a month. That is CHF 600–1,080 a year per person, with almost no change to what actually lands on the plate.

Does sharing groceries in a WG actually save money?

The average Swiss household spends around CHF 636 a month on food and non-alcoholic drinks, according to the Federal Statistical Office. Split a shared kitchen the wrong way and a four-person flat can push well past four times that, because separate shopping means four half-used bottles of oil, four bags of rice and four tubs of yoghurt quietly going off in the same fridge.

Pooling changes the maths in three ways. Buying staples once instead of four times unlocks the larger, cheaper pack sizes. Cooking shared dinners spreads the cost of a single recipe across everyone at the table. And a shared fridge with one clear owner per item wastes far less food, which matters when Swiss households already bin roughly 119 kg of food per person a year. A couple sharing a kitchen sees the same effect, and the two-person grocery budget scales cleanly up to three, four or five.

Which grocery-splitting system fits your WG?

There is no single right way to split a food bill between flatmates, only the system your particular WG will actually stick to. Five setups cover almost every Swiss flatshare, and most households end up blending two of them rather than picking one outright.

What should a WG buy together in bulk?

Bulk buying is where a shared kitchen makes its clearest gains, because the per-kilo price of a big pack is almost always lower than the small one. The catch is that the pack has to be eaten before it turns, and a WG of four or five is one of the few Swiss households large enough to clear a wholesale bag of rice or a catering tray of chicken without waste. That is exactly when a run to Aligro or a Denner bulk buy pays off; the full logic is in our guide to when bulk buying actually saves money.

Good shared bulk buys for a Swiss WG:

• Dry staples: rice, pasta, oats, flour and lentils in big bags at Aldi, Lidl or Aligro, split by weight.
• Cooking basics: sunflower and olive oil, salt, stock, tinned tomatoes and spices; one good set for the whole flat beats four half-used jars.
• Freezer proteins: a wholesale tray of chicken, mince or Cervelat, divided into freezer bags on the day you buy it.
• Cleaning and paper: not food, but the same logic; dish soap, sponges, bin bags and toilet paper are cheapest in big multipacks and used by everyone.

Own-brand and discounter lines carry most of the saving. A 30-item basket cost CHF 162.05 at Lidl in the 2024 K-Tipp comparison against CHF 170.37 at Migros, and across a full 100-item shop the discounters run about 12% below Migros. Over a WG's monthly staples, that gap alone is real money.

How much should each flatmate put in the kitty?

Base the number on what you actually spend, not on a figure pulled from the air. Run the shared shop your usual way for three or four weeks, keep the receipts, then divide the real total by the number of flatmates. Most Swiss WGs that share staples and a few dinners a week land between CHF 40 and CHF 80 per person per month in the common pot, separate from whatever each person spends on their own food.

Keep the money visible. A cash tin on the counter works, but a shared digital ledger works better: Tricount, Splitwise or even a shared note lets everyone see the balance and top up before the pot runs dry. Whoever shops logs the receipt total, and the app keeps everyone square. Revisit the amount once a term, because prices drift, and Swiss food already sits about 61% above the EU average, so a kitty that felt generous in September can feel tight by spring.

How do you avoid fridge disputes?

Most flat-share friction is not really about money; it is about the yoghurt that vanished and the leftovers someone quietly finished. A few plain rules head off almost all of it. Give each flatmate a named shelf in the fridge and a named section in the cupboard, and agree that anything on a personal shelf is off-limits without asking. Shared items live on one agreed shelf and come out of the kitty.

The rest is upkeep. Label the communal oil, spices and condiments so nobody has to guess. Do a five-minute fridge sweep before the big shop, one flatmate once a week, to pull anything about to turn to the front, which is also the single biggest thing a WG can do about the roughly 119 kg of food each of us wastes a year. Keep the shared shopping list somewhere everyone can add to it, so the person shopping is not guessing what the flat has run out of. Anyone moving into their first flatshare will find a fuller checklist in our student grocery guide.

Setting up a fair WG grocery system step by step

You do not need a spreadsheet or a weekly house meeting. Six steps get a fair system running in an afternoon:

1. Agree what is shared. Decide together which categories are communal (usually staples, cleaning and a set number of shared dinners) and which stay personal.
2. Pick one system from the table above. A shared kitty for staples plus a split-the-receipt app for everything else suits most WGs.
3. Set the starting kitty. CHF 50 per person for staples is a safe opener; adjust after four weeks of real receipts.
4. Choose your tools. One shared list everyone can edit, one ledger app for the money, one named shelf each in the fridge.
5. Name a shopper, or rotate. Either one person does the main shop and gets reimbursed, or you take turns and let the app keep the balance level.
6. Review monthly. Five minutes with the receipts to check the kitty still matches reality, then carry on.

This is the part a shared list is built for. Eini's algorithm turns the flat's agreed meals into one grocery list with live prices from Coop, Migros, Lidl, Aldi, Denner and Aligro, so whoever draws the short straw for the shop walks in knowing exactly what to buy and what it should cost.