Swiss self-service farm shops can be operated today without staff and without an honesty box – with TWINT QR stickers, QR codes with payment pages, or vending machines with card payment. The classic honesty box (kässeli) causes around 5% shrinkage, according to a study by the University of Bern – even more for higher-value products such as honey or meat. Cashless solutions reduce this shrinkage, simplify bookkeeping, and offer customers the payment experience they are used to.

This guide compares the three common models for cashless payment in unstaffed farm shops, shows the actual costs per transaction, and helps you find the right solution for your business.

1. Honesty boxes are a thing of the past: Why Swiss farm shops are converting

Over 11,000 Swiss farms sell directly from the farm – the number has increased by around 60% in recent years. For most of them, sales are based on self-service: eggs, vegetables, honey, flowers, or milk are placed in a room or shelter, customers help themselves, and put the money in a box. This model of the honesty box works better in Switzerland than in many other countries – researchers at the University of Bern estimate payment compliance at around 95%. This sounds high, but in practice it still means noticeable losses: with an annual turnover of CHF 20,000, around CHF 1,000 is missing.

In addition: fewer and fewer customers carry the exact change. Anyone who only has a 50-franc note either does not buy – or leaves a note promising to pay later. Cashless payment solves several problems at once: no shrinkage due to theft, no change problems, and seamless documentation of every transaction for bookkeeping.

2. Three models compared: TWINT QR stickers, QR code payment, and vending machines

For unstaffed farm shops, there are essentially three solutions to consider. Each has its place – depending on the product range, sales volume, and willingness to invest.

The table shows: there is no single best model. For many farm shops, a combination makes sense – such as a TWINT QR sticker as a basic level and an additional QR code with a payment page for customers who want to pay by card.

3. TWINT QR stickers in unstaffed farm shops: simple, but with risks

The TWINT QR sticker is the simplest solution for cashless payment without staff. Over 1,000 Swiss farm shops are already using it since the Swiss Farmers' Union (SBV) launched the solution in cooperation with TWINT in 2019. The principle: customers scan the QR code with their TWINT app, enter the amount themselves, and confirm the payment. The amount is transferred directly to the farm shop's account.

The big advantage: zero investment, zero running fixed costs. You don't need a terminal, electricity, or internet. The transaction fee is around 1.3% depending on the provider – with a carton of eggs for CHF 6, that's 8 centimes. This is less than the shortfalls that typically occur with an honesty box.

What the TWINT QR sticker cannot do

The weakness lies in the lack of amount control. Customers enter the amount themselves – the system does not check whether the entered amount corresponds to the price of the goods. There is therefore no technical protection against underpayment. In addition, the TWINT QR sticker only accepts TWINT. Anyone who does not have a Swiss banking app – such as tourists or cross-border commuters – cannot pay.

4. QR code with payment page: more control, more payment methods

The second option goes one step further: a QR code that does not lead to the TWINT app, but to a payment page in the browser. There, the amount is either already pre-set or customers select the product from a list. Payment is made via TWINT, credit card, debit card, Apple Pay, Google Pay, or another supported payment method.

Advantages over the pure TWINT QR sticker

First: amount control. You determine which amounts are available for selection – for example "Carton of eggs CHF 6", "Large honey CHF 12", "Bouquet of flowers CHF 8". Customers cannot enter a fantasy amount. Second: more payment methods. Even customers without TWINT can pay. Third: receipt by email and a clean transaction overview in the Dashboard.

How does it work technically?

You create a payment page or a payment link via a payment provider. This generates a QR code that you print out and display in the farm shop. There are two variants: a static QR code per product (e.g. a QR code on the egg shelf, one for honey) or a dynamic QR code where customers select the product themselves on the payment page. Both variants work without a terminal, electricity, or internet – the customer's smartphone does everything.

Cost example

With a payment of CHF 6 via TWINT using Payrexx QR Pay, fees of 1.25% + CHF 0.00 apply – which is 8 centimes. With a card payment via the Payrexx Free plan: 2.50% + CHF 0.30 = 45 centimes. From CHF 19 / month (Standard plan), card fees drop to 1.65% + CHF 0.18 = 28 centimes. For farm shops with few card transactions, the free plan is sufficient; for regular card volumes, the Standard plan is worthwhile.

5. Vending machines and fridges with card payment: when hardware is worth it

The third option is the farm shop vending machine: a device with a touchscreen, barcode scanner, and integrated payment function (cash, card, TWINT). Vending machines offer the highest control because products are only dispensed after payment. In Switzerland, providers such as BiLL GmbH, itWorks (speedy), or Ruedu are active.

For whom vending machines are worthwhile

Vending machines pay off for higher sales volumes (from approx. CHF 30,000–50,000 annual turnover), for higher-value products (meat, cheese, milk), and if the farm shop is located at a high-frequency location, such as on a main road. Typical investment costs are between CHF 3,000 and CHF 10,000 depending on the equipment. In addition, there are running costs for electricity, internet, maintenance, and transaction fees. A tablet-based self-service POS system (e.g. itWorks speedy) is cheaper: from approx. CHF 1,300 for the hardware and around CHF 37 / month for software and card payment.

Practical tip: electricity and internet

Vending machines and POS systems need electricity and usually an internet connection. In remote farm shops without electricity, this is a real obstacle. In such cases, TWINT QR stickers or QR codes with payment pages remain the only realistic option, as they do not require any infrastructure at the location.

6. Theft, cash shortfalls, and control: how to keep track of things

The basic problem in unstaffed farm shops remains: nobody checks whether payment has been made. Even cashless solutions do not eliminate theft completely – someone can still take goods without scanning the QR code. But they reduce shrinkage significantly because the honest majority pays correctly and the transactions are documented.

Measures to reduce shrinkage

According to the study by the University of Bern, video surveillance increases payment compliance by around 5%. In Switzerland, a sign indicating the camera is mandatory, and the camera must not cover public ground. In addition, clearly visible price tags, clear payment instructions, and a friendly atmosphere help. Statistically, farm shops located in or near a town are less affected by theft than those in remote locations.

For bookkeeping, cashless solutions offer a decisive advantage: every transaction is documented. With TWINT, you can see the receipts in the bank or TWINT statement. With QR payment pages, you have a Dashboard with all transactions, export functions, and automatic reconciliation. This saves time when cashing up and simplifies VAT accounting.

7. Seasonal products, changing prices: flexible billing for strawberries, eggs, and honey

Farm shops often sell seasonal products with fluctuating prices. Strawberries cost CHF 8 per basket this week, maybe CHF 6 next week. The bunch of asparagus is sold out, but there are fresh courgettes. This poses challenges for any payment system.

Practical example: farm shop with three product lines

A business sells eggs (CHF 6 / carton), honey (CHF 12 / jar), and seasonal vegetables (CHF 4–8, changing). For the eggs and the honey, a static QR code per product is suitable: the price rarely changes, the QR code hangs on the corresponding shelf. For the vegetables, a dynamic QR code with a product list is more practical: you update the assortment and prices easily online, the same QR code on the vegetable shelf always shows the current offer.

Weatherproof QR codes

A QR code outdoors must be UV-resistant, waterproof, and robust. Laminated printouts last a few months but yellow over time. Better are acrylic glass holders or aluminium signs with an embedded QR code. Some payment providers supply weatherproof stickers or signs. Before displaying, check whether the QR code is legible even in sunlight and from different angles.

8. Checklist: set up cashless payments for your self-service farm shop

• Take stock: how many products, which price categories, how often do prices and assortment change?

• Check infrastructure: is there electricity and internet at the location? If not, only TWINT QR stickers or QR codes with payment pages are suitable.

• Set up TWINT QR sticker as a basic level – free of charge, done in 10 minutes, covers the majority of Swiss customers.

• In addition, set up QR codes with a payment page for customers who want to pay by card, Apple Pay, or Google Pay.

• Display prices clearly – even if the QR code pre-sets the amount. Customers need to know what they are paying before scanning.

• Mount QR codes in a weatherproof way: laminated, in acrylic glass, or as an aluminium sign. Test readability in sunlight.

• Consider video surveillance: increases payment compliance. A warning sign is mandatory, public ground must not be recorded.

• Set up bookkeeping: use the payment provider's transaction export. Record TWINT sales and cash sales separately.

• Keep the honesty box as a supplement? If yes, only as a backup for the few customers without a smartphone. Do not leave a large cash deposit in the shop.

• Test and optimize: evaluate transactions after 4 weeks, compare shrinkage, adjust QR code placement or product list if necessary.

If you are looking for a QR payment solution without hardware, Payrexx QR Pay offers a variant that is specially designed for small amounts and self-service: 1.25% + CHF 0.00 per transaction (Visa cooperation), plus TWINT, credit cards, and mobile wallets via a hosted payment page.

The Free plan costs nothing per month; prices and products can be adjusted online at any time. Via payment links and payment pages, even farm shops without a website and without technical knowledge can collect cashless payments in a few minutes. Learn more at payrexx.com/products/qr-pay.