The introduction of the mandatory National System of e-Invoices (KSeF) is one of the most significant innovations in business administration in recent years. Although many business owners fear that a complete switch to e-invoices will require additional time and effort on their part, in reality this change could provide an impetus to streamline processes and reduce costs. The key is understanding how KSeF works and how it can improve a company’s day-to-day operations.
The aim of introducing the mandatory KSeF system is to simplify document circulation, enhance data security and reduce red tape. Rather than perceiving the system as a threat, consider it as an opportunity to bring about a real improvement in how an organisation operates. What does every business owner need to know to prepare properly for the changes to issuing and receiving invoices, and how should they approach the implementation in practice?
1. KSeF will be mandatory for everyone
On 1 February 2026, the use of KSeF became mandatory for the first group of businesses in Poland. These are companies that achieved a VAT turnover of over PLN 200 million gross in 2024. Other VAT taxpayers, with the exception of the smallest entrepreneurs deemed to be ‘digitally excluded’, will have to start issuing invoices via KSeF from 1 April 2026. This obligation will be extended on 1 January 2027 to businesses with monthly turnover less than PLN 10,000 gross, as well as other cases temporarily exempt until the end of 2026. This means that very soon, all VAT taxpayers in Poland will be using KSeF. Furthermore, even if a company is not yet required to issue e-invoices, it must be ready to receive them via the system from the day the system becomes mandatory for other taxpayers (1 February 2026).
2. Granting primary and secondary permissions for enhanced security
KSeF introduces a clear system of permissions that regulates access to invoices. The primary permissions are held by the so-called KSeF Master – this could be, for example, the business owner or a person designated by them. These permissions allow not only the issuing of invoices, but also the granting, modifying and revoking of access rights for other users. The KSeF Master also has the option of authorising an accounting firm or another entity to self-invoicing.
Secondary permissions allow users to perform specific actions within the system – such as issuing or viewing invoices – but do not include the ability to manage access rights further. It is important to grant these permissions only to individuals or entities with the appropriate authority. You should also take into account temporary replacements, holiday leaves and staff changes.
In practice, using access rights means greater control over document workflows and clearly defined roles within the company. It also makes collaboration with an accounting firm much easier – a business owner can securely grant the accounting firm the appropriate level of access, without sharing passwords or granting full access to all systems. This enhances data security, streamlines communication and reduce manual steps to send invoices by email, which results in faster and more organised settlements.
3. KSeF will help you organise internal processes
Consider conducting a brief audit of your internal processes before you switch to KSeF. You can do this even if your company has already started issuing first e-invoices via the system. This is a right time to review your company’s current invoicing workflow: from sale, through issuing documents, to settlement and filing. Where do delays occur? Who is responsible for each stage? Who makes the key decisions and how long is the whole process? Do documents circulate between departments, or do they move smoothly on to the next person?
Identifying and analysing what works and what slows down day-to-day operations allows KSeF to be used as a tool for streamlining processes, rather than just a mandatory platform for issuing invoices. Well-organised and efficient processes mean clearly defined roles for staff and external service providers, shorter decision-making paths, and the reduction of unnecessary and time-consuming tasks.
4. Automation and modern tools as cost-saving solutions
The implementation of KSeF is a significant opportunity for businesses to move beyond mere legal compliance. Integrating your sales software with KSeF, automatic invoice posting, creating bank transfer lists directly from documents, and electronic document circulation within the company – these are solutions that genuinely reduce working time, ease staff workload and minimise errors. At this stage, consider switching to a ‘zero paper’ model, which fully meets the needs of modern businesses. Thanks to KSeF, there is no manual data transcription, no need to send invoices by email or multiple versions of the same document provided to customers. Streamlined communication with an accounting firm enables faster monthly financial closes and provides real-time visibility into an organisation’s cash flow. A well-implemented KSeF can be the first step to process digitisation, which translates into tangible savings in terms of time and operational costs.
5. Take a step-by-step approach
If you have never used KSeF before, you might feel a bit lost. However, instead of getting overwhelmed by the technical jargon of certificates, access rights, and modes, approach the implementation as a step-by-step process. We have drafted a consolidated checklist designed to help you prepare for KSeF. You can use it to keep records of what has already been completed and what still needs to be done:
Download the checklist from here:
https://drive.google.com/file/d/1FILKxKQteKsBFgcM27KvatMhuSA7g5uy/view?usp=sharing
Mandatory KSeF is not yet another administrative burden, but a transformative tool designed to streamline and reduce costs of business operations. It gives an opportunity to take a ‘closer look’ at your company operations, restructure and organise administrative processes for enhanced efficiency.
