Run a cashless self-service farm shop: Unattended payment solutions

Swiss self-service farm shops can now be operated without staff and without an honesty box – using 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 causes around 5% shrinkage – even more for higher-value products such as honey or meat. Cashless solutions reduce this shrinkage, simplify accounting, and offer customers the payment experience they are used to.

This guide compares the three common models for cashless payments in unattended farm shops, outlines the specific costs per transaction, and helps you find the right solution for your business.

1. The honesty box is a thing of the past: Why Swiss farm shops are making the switch

Over 11,000 Swiss agricultural businesses sell directly from the farm – a figure that has increased by around 60% in recent years. For most of them, sales are self-service: eggs, vegetables, honey, flowers, or milk are displayed in a room or shelter, customers help themselves and put the money into 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%. While that sounds high, it still translates into noticeable losses: with an annual turnover of EUR 20,000, around EUR 1,000 is missing.

On top of that, fewer and fewer customers carry exact change. Anyone carrying only a 50-franc note either does not buy – or leaves a note promising to pay later. Cashless payments solve multiple problems at once: no shrinkage due to theft, no issues with change, and complete documentation of every transaction for accounting purposes.

2. Comparing three models: TWINT QR stickers, QR code payments, and vending machines

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

The table shows: there is no single best model. For many farm shops, a combination makes sense – for example, a TWINT QR sticker as a basic option and an additional 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 simplest solution for cashless payments without staff. Over 1,000 Swiss farm shops have been using it since the Swiss Farmers' Union (SBV) launched the solution in collaboration with TWINT in 2019. How it works: 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 bank account.

The major advantage: zero investment, zero ongoing fixed costs. You need no terminal, no electricity, no internet. The transaction fee is around 1.3% depending on the provider – for a carton of eggs costing EUR 6, that is 8 cents. This is less than the shortfalls typically incurred with an honesty box.

What the TWINT QR sticker cannot do

The drawback lies in the lack of amount control. Customers enter the amount themselves – the system does not check whether the entered amount matches the price of the goods. Therefore, there is no technical protection against underpayment. In addition, the TWINT QR sticker exclusively 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 a step further: a QR code that does not direct to the TWINT app, but to a payment page in the browser. There, the amount is either already preset 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 a standalone TWINT QR sticker

Firstly: amount control. You determine which amounts are available for selection – for example «Carton of eggs EUR 6», «Large honey EUR 12», «Bouquet of flowers EUR 8». Customers cannot enter arbitrary amounts. Secondly: more payment methods. Customers without TWINT can also pay. Thirdly: email receipts 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. one QR code on the egg shelf, one next to the honey) or a dynamic QR code where customers select the product themselves on the payment page. Both variants work without a terminal, without electricity, and without internet – the customer's smartphone handles everything.

Cost example

For a payment of EUR 6 via Payrexx QR Pay, fees are 1.25% + EUR 0.30 – that equals 38 cents, regardless of whether payment is made via TWINT or card. From EUR 19/month (Standard plan), card fees drop to 1.65% + EUR 0.18 = 28 cents. For farm shops with few card transactions, the free plan is sufficient; with regular card volume, the Standard plan pays off.

5. Vending machines and refrigerated units with card payment: When hardware is worth it

The third option is a farm shop vending machine: a device featuring a touchscreen, barcode scanner, and integrated payment processing (cash, card, TWINT). Vending machines offer the highest level of control because products are dispensed only after payment. Providers active in Switzerland include BiLL GmbH, itWorks (speedy), and Ruedu.

Who vending machines are suitable for

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

Practical note: Electricity and internet

Vending machines and POS systems require power and usually an internet connection. In remote farm shops without a power supply, this poses a real obstacle. In such cases, TWINT QR stickers or QR codes with a payment page remain the only viable option, as they require no infrastructure on site.

6. Theft, shortfalls, and control: How to stay on top of things

The fundamental issue in unattended farm shops remains: no one checks whether a payment was made. 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 recorded.

Measures to reduce shrinkage

According to the study by the University of Bern, video surveillance increases payment morale by around 5%. In Switzerland, a notice indicating camera surveillance is mandatory, and cameras must not record public areas. In addition, clearly visible price tags, clear payment instructions, and a welcoming atmosphere help. Statistically, farm shops situated in or near a village or town are less frequently affected by theft than those in remote locations.

For accounting, cashless solutions offer a crucial advantage: every transaction is documented. With TWINT, you see incoming payments on your bank or TWINT statement. With QR payment pages, you have a Dashboard with all transactions, export features, and automated reconciliation. This saves time during cash balancing and simplifies VAT reporting.

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

Farm shops often sell seasonal produce with fluctuating prices. Strawberries might cost EUR 8 per punnet this week, perhaps EUR 6 next week. Asparagus is sold out, but fresh courgettes are available instead. This presents challenges for any payment system.

Practical example: Farm shop with three product lines

A farm sells eggs (EUR 6/carton), honey (EUR 12/jar), and seasonal vegetables (EUR 4–8, fluctuating). For the eggs and honey, a static QR code per product is suitable: 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 update the assortment and prices conveniently 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 durable. Laminated printouts last a few months, but yellow over time. Acrylic glass holders or aluminium signs with an embedded QR code are better options. Some payment providers provide weatherproof stickers or signs. Before installing, ensure that the QR code is legible even in direct sunlight and from various angles.

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

• Assess inventory: how many products, which price ranges, how often do prices and product lines change?

• Check infrastructure: is electricity and internet available on site? If not, only TWINT QR stickers or QR codes with a payment page are viable options.

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

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

• Label prices clearly – even if the QR code presets the amount. Customers must know what they are paying before scanning.

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

• Evaluate video surveillance: increases payment morale. Signage is mandatory, and public areas must not be recorded.

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

• Keep an honesty box as a backup? If so, only as a fallback for the few customers without a smartphone. Do not leave large cash reserves 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 provides an option specifically designed for small amounts and self-service: 1.25% + EUR 0.30 per transaction on the Free plan, alongside TWINT, credit cards, and mobile wallets via a hosted payment page.

The Free plan costs nothing per month; prices and products can be updated online at any time. Using payment links and payment pages, even farm shops without a website and without technical expertise can start accepting cashless payments within minutes. Learn more at payrexx.com/products/qr-pay.