Registration of RRO and PRRO: how to set up your cash register without fines or chaos

When a business is required to use a traditional cash register (RRO) or software‑based cash register (PRRO), it is often perceived as pure bureaucracy: forms, applications, electronic keys, fiscalisation. In practice, the issue is much broader: without a properly registered and configured cash register you risk fines for settlement operations, suspension of activities, and conflicts with customers and the tax authority.

Registering an RRO/PRRO is not just a formality. It is crucial to understand when exactly you must use a physical cash register or software RRO, how to link it to business units, what to specify in your product catalogue, how to handle returns, discounts and online payments. At WINNER we help entrepreneurs and companies go through this process without unnecessary experiments and penalties.

Why RRO and PRRO often cause problems

The most common difficulties include:

• incorrectly determining whether you are actually obliged to use RRO/PRRO for your types of activity and payment methods;
• choosing the “first available” software or device without considering the specifics of your business (offline outlets, couriers, online store, marketplaces);
• making mistakes during registration: inaccurate data on business units, NACE codes, working hours, fiscal numbers;
• failing to set up internal procedures: who issues receipts, what to do in case of technical failures, how to record returns and cancellations.

As a result, you face the risk of fines for transactions not processed through RRO/PRRO, claims from the tax authority and conflicts with customers who did not receive a receipt or do not understand how to return goods.

How WINNER helps with RRO and PRRO

We treat cash‑register compliance as part of the overall business model, not as a separate “box” or app.

Typically, we proceed as follows:

• Analyse your payment flows.Which payment methods you use (cash, card via POS terminal, online payment on the website, P2P transfers, cash on delivery) and which sales channels you have (offline points of sale, online store, couriers, marketplaces).
• Determine your RRO/PRRO obligations.We clearly explain when and where you must use cash‑register equipment and where you can legally avoid it, taking into account current legislation.
• Select the right solution.We help you choose between a traditional RRO and a software PRRO, considering the number of locations, transaction volumes, staff mobility and budget for hardware and software.
• Prepare registration.We assist in correctly completing applications, registering RRO/PRRO, linking them to business units, configuring fiscal keys and connectivity with the tax authority.
• Set up operating procedures.Together we draft internal instructions: who has access, who is responsible for processing transactions, how to act in case of system failures, how to document returns and cancellations.

In this way you do not just “have an RRO/PRRO installed” – you have a thought‑through system that minimises risks for your business.

Why you should turn specifically to WINNER

WINNER is a law firm with a team of 20 attorneys and lawyers who work daily at the intersection of tax requirements, cash discipline and real‑life business processes. We help build tailored solutions for a specific format of activity — from a small shop or café to a chain of outlets and online projects.

We support businesses across Ukraine: from an initial consultation (“do we need an RRO/PRRO at all?”) to full registration and configuration of cash registers, as well as defence in the event of inspections and fines. If you want to implement RRO or PRRO without chaos and unnecessary stress, contact WINNER — we will help you do it once and do it right.

Author: Ihor Yasko, Managing Partner of the Law Firm “WINNER”, PhD in Law.