The implementation of KSeF in 2026 – a comprehensive guide for management boards. How to avoid risks and prepare your company?

In the business world, it is rare to find a situation where a single change in legislation affects every single process within a company, no matter how minor. The introduction of the National e-Invoicing System (KSeF) is precisely such a revolution. For company boards, this is not only a technological challenge, but above all a strategic and legal one. At Vinci & Vinci, drawing on our 26 years of experience, we guide companies through this change, ensuring their operational security.

KSeF is not just about IT – why is it a matter for the Board?

Many business owners still view KSeF as ‘just another accounting obligation’. This is a mistake that could prove costly. Once the system comes into force, an invoice will no longer be a document that can be freely amended after it has been issued. It will become a digital business transaction, visible to the tax authorities in real time.

For members of the management board, this represents a new level of responsibility. In accordance with Article 299 of the Commercial Companies Code and the provisions of the Fiscal Penal Code, it is the organisation’s leaders who are responsible for ensuring that procedures are implemented correctly and that accounts are accurate. Incorrect implementation of KSeF entails not only the risk of financial penalties, but above all a threat to the company’s financial liquidity and a personal criminal and fiscal risk for managers.

The 5 most common pitfalls when implementing KSeF

Our observations at Vinci & Vinci suggest that companies most often stumble in areas that seem obvious. Here’s what you need to check within your organisation:

• Lack of process mapping: Who issues invoices in your company? Field sales staff, logistics, or just the finance department? KSeF requires that each of these departments be integrated with the central system.
• Underestimating changes in the cost cycle: Receiving purchase invoices via KSeF changes the way they are approved. The traditional ‘paper signature’ is becoming a thing of the past.
• Permission errors: Who is authorised to issue an invoice on behalf of the company? Managing tokens and access rights is key to a company’s cybersecurity.
• International relations: How will KSeF affect your business partners in Italy or Korea? Cross-border invoices require special attention to ensure they do not disrupt international trade.
• No contingency plans: What will you do if the government system or your internet connection goes down? You need to have a written ‘offline’ plan in place so that your sales aren’t brought to a standstill.

How does Vinci & Vinci support companies through their transformation?

At Vinci & Vinci, we are not merely observers of change – we are the architects of secure processes. Our approach to KSeF is multidisciplinary:

1. Process audit: We examine how information flows within your company.
2. Legal support: Our team of legal advisers ensures that internal procedures protect the Management Board from liability.
3. The CFO’s perspective: We see KSeF as a tool for better cash flow management, not just a chore.
4. International experience: Thanks to our unique specialisation in serving the Italian and Korean markets, we ensure seamless settlement in any language and according to any standard.

Summary: Is your business ready?

KSeF in 2026 will be a test of your business’s digital maturity. We invite you to visit our office on the 11th floor of the Stalexport building in Katowice. Over a good cup of Italian coffee, we’ll analyse your company’s situation and work with you to draw up an implementation schedule that will give you peace of mind and security.