Swiss self-service farm shops can be operated today without personnel and without an honesty box – 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 classic honesty box (Kässeli) causes around 5% shrinkage – with higher-value products such as honey or meat even more. 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 concrete costs per transaction, and helps you find the right solution for your business.

1. Honesty boxes are history: Why Swiss farm shops are switching

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 self-service: eggs, vegetables, honey, flowers, or milk are inside a room or shelter, customers serve themselves and place the money in a cash box. This honesty box model works better in Switzerland than in many other countries – researchers at the University of Bern estimate payment morale at around 95%. That sounds high, but translated into numbers it still means noticeable losses: with an annual turnover of EUR 20’000, around EUR 1’000 are missing.

Additionally: fewer and fewer customers carry the exact change with them. 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-giving problem, 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, basically three solutions come into question. Each has its place – depending on the product range, sales volume, and willingness to invest.

The table shows: there is no universally best model. For many farm shops, a combination makes sense – such as a TWINT QR sticker as a basic level and additionally a 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 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 running fixed costs. You do not need a terminal, no electricity, no internet. Depending on the provider, the transaction fee is around 1.3% – for an egg carton for EUR 6, that is 8 centimes. That 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 product price. There is therefore no technical protection against underpayment. In addition, the TWINT QR sticker exclusively 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 a 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 predefined or customers select the product from a list. The 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 – e.g. «Egg carton EUR 6», «Large honey EUR 12», «Bouquet of flowers EUR 8». Customers cannot enter an imaginary amount. Second: more payment methods. Even customers without TWINT can pay. Third: receipt via email and a clear 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 hang up in the farm shop. There are two variants: a static QR code per product (e.g. glass a QR code on the egg shelf, one by the honey) or a dynamic QR code where customers select the product on the payment page themselves. Both variants work without a terminal, without electricity, and without internet – the customer's smartphone handles everything.

Cost example

With a payment of EUR 6 via TWINT using Payrexx QR Pay, 1.25% + EUR 0.00 is charged – that's 8 centimes. For card payments via the Payrexx Free plan: 2.50% + EUR 0.30 = 45 centimes. From EUR 19/month (Standard plan), the 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 volume, the Standard plan is worthwhile.

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

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. EUR 30’000–50’000 annual sales), for higher-value products (meat, cheese, milk), and if the farm shop is located in a highly frequented area, such as a main road. Typical investment costs are between EUR 3’000 and EUR 10’000 depending on the features. In addition, there are running costs for electricity, internet, maintenance, and transaction fees. A self-service POS system on a tablet basis (e.g. itWorks speedy) is more affordable: from approx. EUR 1’300 for the hardware and around EUR 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 connection, 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 at the location.

6. Theft, discrepancies, and control: how you keep track

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

Measures for shrinkage reduction

According to the study by the University of Bern, video surveillance increases payment morale by around 5%. In Switzerland, a sign indicating the camera is mandatory, and the camera must not capture public ground. In addition, clearly visible price tags, clear payment instructions, and a friendly atmosphere help. Visually, 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 the entries in the bank or TWINT statement. With QR payment pages, you have a Dashboard with all transactions, export function, and automatic reconciliation. This saves time during balancing and simplifies VAT invoicing.

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

Farm shops often sell seasonal products with fluctuating prices. The strawberries cost EUR 8 per tray this week, maybe EUR 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 (EUR 6/carton), honey (EUR 12/jar), and seasonal vegetables (EUR 4–8, changing). A static QR code per product is suitable for the eggs and honey: 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 easily update the range and prices online, and 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 turn yellow over time. Acrylic glass holders or aluminium signs with embedded QR codes are better. Some payment providers supply weatherproof stickers or signs. Before hanging them up, check whether the QR code is readable even in sunlight and from different angles.

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

• Take stock: how many products, which price ranges, 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 possible.

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

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

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

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

• Check video surveillance: increases payment morale. Warning sign is mandatory, public ground 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 yes, only as a backup for the few customers without a smartphone. Do not leave a large cash depot 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 specifically suitable for small amounts and self-service: 1.25% + EUR 0.00 per transaction (cooperation with Visa), in addition to 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. Find out more at payrexx.com/products/qr-pay.