Swiss self-service farm shops can be operated without staff and without an honesty box today – with TWINT QR stickers, QR codes with a payment page, or vending machines with card payment. According to a study by the University of Bern, the traditional honesty box (Kässeli) causes around 5% shrinkage – 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 unattended farm shops, shows the actual costs per transaction, and helps you find the right solution for your business.

1. The honesty box is history: Why Swiss farm shops are switching

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

What is more, fewer and fewer customers carry the exact change. Anyone with only 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 through 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 unattended farm shops, there are essentially three solutions to choose from. 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 is appropriate – such as a TWINT QR sticker as a basic level, supplemented by a QR code with a payment page for customers who want to pay by card.

3. TWINT QR stickers in unattended farm shops: Simple, but with risks

The TWINT QR sticker is the easiest 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 2019 in cooperation with TWINT. 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 ongoing fixed costs. You do not need a terminal, electricity, or internet. Depending on the provider, the transaction fee is around 1.3% – for a box of eggs for EUR 6, that is 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 pricing 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. Furthermore, the TWINT QR sticker only accepts TWINT. Anyone without 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 open the TWINT app, but leads to a payment page in the browser. There, the amount is either already specified or the customer selects 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 – such as "Egg carton EUR 6", "Large honey EUR 12", "Flower bouquet EUR 8". Customers cannot enter a fantasy amount. Second: more payment methods. Even customers without TWINT can pay. Third: receipt via email and a clean transaction overview in the Dashboard.

How does this work technically?

You create a payment page or a payment link via a payment provider. This generates a QR code, which 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 on the honey shelf) or a dynamic QR code where customers select the product on the payment page themselves. Both options work without a terminal, power, or internet – the customer's smartphone handles everything.

Cost example

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

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 level of 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 are profitable for higher turnover volumes (from approx. EUR 30,000–50,000 annual sales), for higher-value products (meat, cheese, milk), and if the farm shop is located in a high-traffic area, such as on a main road. Typical investment costs are between EUR 3,000 and EUR 10,000 depending on the features. In addition, there are ongoing costs for electricity, internet, maintenance, and transaction fees. A tablet-based self-service POS system (e.g. itWorks speedy) is cheaper: from approx. EUR 1,300 for the hardware and around EUR 37/month for software and card payments.

Practical hint: power and internet

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

6. Theft, discrepancies, and monitoring: How to keep track

The basic problem in unattended farm shops remains: nobody monitors whether a purchase was paid for. Cashless solutions do not completely eliminate theft either – someone can take goods without scanning the QR code. However, they significantly reduce shrinkage because the honest majority pays correctly and transactions are documented.

Measures to reduce shrinkage

According to the study by the University of Bern, video surveillance increases payment compliance by around 5%. Notice of the camera is mandatory in Switzerland, and the camera must not record any public land. Visible price tags, clear payment instructions, and a friendly atmosphere also help. Farm shops located in or near a town are statistically less affected by theft than those in remote locations.

For bookkeeping, cashless solutions offer a decisive advantage: every transaction is documented. With TWINT, you see incoming payments 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 during cash ups and simplifies VAT accounting.

7. Seasonal products, changing prices: Flexible checkout for strawberries, eggs, and honey

Farm shops often sell seasonal products with fluctuating prices. Strawberries might cost EUR 8 per basket this week, and perhaps EUR 6 next week. The bundle of asparagus is sold out, but there are fresh courgettes. This poses a challenge for any payment system.

Practical example: Farm shop with three product lines

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

Weatherproof QR codes

An outdoor QR code must be UV-resistant, waterproof, and robust. Laminated printouts last a few months but yellow over time. Acrylic glass holders or aluminium plates with embedded QR codes are better. Some payment providers supply weatherproof stickers or signs. Before putting it up, check if the QR code is readable even in sunlight and from different angles.

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

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

• Check infrastructure: is there power and internet on site? If not, only TWINT QR stickers or QR codes with payment pages are suitable.

• Set up TWINT QR stickers as a base – free, done in 10 minutes, covers the majority of Swiss customers.

• Set up complementary QR codes with payment pages for customers who want to pay using card, Apple Pay, or Google Pay.

• Clearly label prices – even if the QR code predefines the amount. Customers need to know what they are paying before scanning.

• Mount QR codes robustly and weatherproofly: laminated, in acrylic glass, or as an aluminium sign. Test readability in sunlight.

• Consider video surveillance: increases payment compliance. A warning sign is mandatory, and public land must not be captured.

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

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

• Test and optimize: review 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 variation specifically suitable for small amounts and self-service: 1.25% + EUR 0.00 per transaction (Visa cooperation), with TWINT, credit cards, and mobile wallets on 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 receive cashless payments within minutes. Learn more at payrexx.com/products/qr-pay.