Digital payment systems in parking management have long been part of everyday life. Users book parking spaces online, pay via Stripe or PayPal, and receive receipts automatically by email. For operators, this means less administrative effort and more convenience – but also more responsibility. Anyone collecting parking fees is operating within the realm of financial accounting and is therefore subject to legal requirements such as the GoBD (Principles for the proper management and storage of books, records, and documents in electronic form) and the Cash Register Security Ordinance (KassenSichV).
It is particularly important for companies, municipalities, and facility operators to understand the legal requirements to ensure they are on the safe side during audits. This article explains exactly what needs to be considered, when the KassenSichV applies, and how digital systems like ParkEfficient enable legally compliant billing.
Key takeaways
- Tax relevance: Every parking fee payment is a taxable transaction – regardless of whether it is a public, private, or company parking lot.
- GoBD compliance: Digital payments must be documented in a complete, unalterable, and traceable manner.
- KassenSichV (Cash Register Security Ordinance): Applies to cash payments or parking machines with a POS system; online payments (e.g., Stripe, PayPal) usually do not.
- Receipt issuance: Digital receipts via email or download meet legal requirements and simplify archiving.
- The ParkEfficient advantage: Automated, audit-proof documentation, integration of online payment and TSE-compliant machines, GDPR-compliant storage, reduces sources of error and administrative burden.
Why parking fees are relevant for tax law
As soon as a fee is charged for the use of a parking space, it constitutes a taxable transaction, regardless of whether it is a public area, a private parking garage, or company premises. Revenue must be recorded and documented correctly.
It becomes particularly critical when payments are accepted in cash. Here, strict requirements for recording, receipt issuance, and traceability apply. However, even with digital payments, such as those via web apps, machines, or online booking systems, operators are required to document revenue in accordance with GoBD.
This means that every transaction must be fully traceable, unalterable, and clearly attributable. If this traceability is missing, you risk significant issues during tax audits.
GoBD: Principles of proper accounting
The GoBD form the foundation for all digital recording and accounting processes. They apply to every company that electronically records or processes tax-relevant data.
In the context of parking management, this specifically means:
Every payment, booking, and receipt must be stored in a complete, accurate, timely, orderly, and unalterable manner. Digital cash register or booking systems must also ensure that no data can be manipulated after the fact.
ParkEfficient meets these requirements by logging all transactions in an audit-proof manner and storing them traceably. Each process is assigned a unique transaction ID that can be verified at any time. Changes to data records, such as chargebacks, are documented and timestamped.
KassenSichV: When it applies and when it doesn't
Since 2020, the Cash Register Security Ordinance (KassenSichV) has mandated a technical security system (TSE) for electronic cash register systems. This TSE is designed to prevent manipulation of digital cash registers by cryptographically securing every transaction.
Whether the KassenSichV applies to a Smart Parking System depends on how payments are processed. The regulation always applies when an operator accepts cash or uses a payment terminal – in other words, physically handles money or processes card payments on-site. In this case, the system is considered an electronic cash register and requires a certified TSE.
However, if all payments are made exclusively online – for example, via a web app using Stripe, PayPal, or SEPA direct debit – the KassenSichV generally does not apply. These transactions are considered cashless payments and are recorded directly via the payment provider. It remains important, however, that these processes must also be documented in compliance with GoBD.
For operators, it is therefore crucial to have a precise understanding of the payment flow. Those who also operate parking ticket machines must ensure that these devices also meet TSE requirements or are separately certified.
Receipt issuance requirement: Digital instead of paper
Another aspect of the KassenSichV is the so-called receipt issuance requirement. Operators must provide users with a receipt for every transaction – regardless of whether it is in paper or digital form.
Digital systems have clear advantages here: The receipt is generated automatically, contains all legally required information, and can be provided directly via email or a download link. Paper receipts are no longer necessary.
ParkEfficient creates receipts fully automatically and stores them in the system in an audit-proof manner. The user receives the receipt via email or can retrieve it from their personal account. This makes the entire process transparent and verifiable at any time – an important point for tax audits.
Requirements for the content and retention of receipts
Regardless of whether receipts are digital or analog, they must contain certain mandatory information. This includes the name and address of the operator, the date and time, the type and scope of the service, the price, and the payment method used.
In addition, the statutory retention period applies: Tax-relevant documents must be archived for ten years. Digital systems should therefore ensure automated, secure storage.
ParkEfficient stores all receipts in encrypted form on certified servers. Operators have access to the data at all times without having to set up complex archive structures themselves. Data storage is carried out in accordance with GDPR and ISO 27001 – including access protection, logging, and regular backups.
Typical sources of error in parking fee billing
Many operators underestimate the tax complexity and make avoidable mistakes. Common pitfalls include:
• Missing documentation for cash payments
• Incomplete or incorrect receipts
• No traceable link between payment and booking
• Lack of GoBD-compliant archiving
• Outdated cash register or machine systems without TSE
Such oversights can quickly become expensive during a tax audit. In the worst case, fines or additional tax demands may be imposed. Therefore, switching to a digital, legally compliant system early on is worthwhile.
ParkEfficient as a legally compliant solution
ParkEfficient was developed from the outset to ensure that all processes comply with GoBD requirements. Every booking is saved with a timestamp and a unique reference. If required, the system can export receipt data or generate audit-proof evidence, which is ideal for tax advisors and auditors.
For operators who also run machines or barriers with payment terminals, the system can be expanded to ensure that KassenSichV requirements are also met. Thanks to its modular architecture, the system remains flexible, whether for online payments, card terminals, or mixed operations.
Furthermore, ParkEfficient supports the trend toward digital receipts, helping operators reduce paper consumption. This not only saves costs but also aligns perfectly with sustainable corporate goals.
Conclusion: Security begins with transparency
Anyone charging parking fees should not rely solely on the payment provider, but rather take a holistic approach. Legally compliant billing means more than just recording revenue—it encompasses documentation, traceability, and record-keeping.
With a system like ParkEfficient, these requirements can be met automatically. Operators benefit from a centralized solution that accounts for both tax regulations and user convenience. This ensures that parking fees are processed not only efficiently but also in compliance with GoBD and KassenSichV standards—transparent, secure, and future-proof.
