Operating 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 – and 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, shows 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 switching

More than 11,000 Swiss agricultural businesses sell directly from the farm – a figure that has risen by around 60% in recent years. For most, sales operate via self-service: eggs, vegetables, honey, flowers, or milk are displayed in 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 is missing.

In addition: fewer and fewer customers carry exact change. Anyone carrying only a 50-franc note either doesn't buy anything – or leaves a note promising to pay later. Cashless payment solves several problems at once: no shrinkage through theft, no change issues, and seamless documentation of every transaction for accounting.

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

For unattended farm shops, three main solutions are considered. 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 base level, supplemented by a QR code with a payment page for customers who want to pay by card.

3. TWINT QR sticker 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. 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 major 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 carton of eggs for EUR 6, that is 8 centimes. That is less than the shortfalls typically incurred 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 matches the price of the goods. There is therefore no technical protection against underpayment. Furthermore, the TWINT QR sticker accepts only 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 leads not 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 the pure TWINT QR sticker

First: amount control. You determine which amounts are available for selection – for example "Carton of eggs EUR 6", "Honey large EUR 12", "Bouquet of flowers EUR 8". Customers cannot enter an arbitrary 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 it 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 by the honey) or a dynamic QR code through which customers select the product themselves on the payment page. Both variants work without a terminal, without power, and without internet – the customer's smartphone handles everything.

Cost example

For a payment of EUR 6 via Payrexx QR Pay, 1.25% + EUR 0.30 applies – that is 38 centimes, 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 centimes. For farm shops with few card transactions, the free plan is sufficient; with regular card volume, the Standard plan is worthwhile.

5. Vending machines and refrigerated units 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 pay off with higher sales volumes (from approx. EUR 30,000–50,000 annual turnover), for higher-value products (meat, cheese, milk), and when the farm shop is in a high-traffic location, such as along a main road. Typical investment costs range between EUR 3,000 and EUR 10,000 depending on features. Added to this are ongoing costs for electricity, internet, maintenance, and transaction fees. A self-service POS system based on a tablet (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 note: Power and internet

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

6. Theft, shortfalls, and control: How to maintain an overview

The fundamental problem in an unattended farm shop remains: no one checks whether payment has been made. Even cashless solutions do not completely eliminate theft – someone can take goods without scanning the QR code. But 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 morale by around 5%. A sign indicating the camera is mandatory in Switzerland, and the camera must not capture public property. In addition, clearly visible price tags, clear payment instructions, and a welcoming atmosphere help. Farm shops located in or near a town are statistically less affected by theft than those in remote locations.

For accounting, cashless solutions offer a decisive advantage: every transaction is documented. With TWINT, you see incoming payments on the bank or TWINT statement. With QR payment pages, you have a Dashboard with all transactions, an export function, and automatic reconciliation. This saves time during cash balancing 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 cost EUR 8 per punnet this week, perhaps EUR 6 next week. The bunch of asparagus is sold out, but fresh courgettes are available. 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 hangs on the relevant shelf. For vegetables, a dynamic QR code with a product list is more practical: you update the product range 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 robust. Laminated printouts last a few months, but yellow over time. Acrylic glass holders or aluminium signs with an embedded QR code are better. Some payment providers supply weatherproof stickers or signs. Before mounting, check whether the QR code is also readable in direct sunlight and from various angles.

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

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

• Check infrastructure: Are electricity and internet available on site? If not, only TWINT QR stickers or QR codes with a payment page can be considered.

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

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

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

• Mount QR codes weather-proofed: Laminated, in acrylic glass, or as an aluminium sign. Test readability in sunlight.

• Check video surveillance: Increases payment morale. A warning sign is mandatory; public property must not be captured.

• Set up accounting: Use the payment provider's transaction export. Record TWINT revenues and cash turnover 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 reserve 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 specifically suitable for small amounts and self-service: 1.25% + EUR 0.30 per transaction on the Free plan, 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, farm shops without a website and without technical knowledge can accept cashless payments in just a few minutes. Find out more at payrexx.com/products/qr-pay.