The introduction of the mandatory National e-Invoice System (KSeF) is a revolution in the circulation of financial documents in Poland. Companies are therefore faced with a challenge: how can they integrate with KSeF quickly, safely, and as seamlessly as possible, without wasting valuable resources and IT team time? Ksefapi.pl comes to the rescue—a comprehensive and modern integration tool that Read more…
An invoice correction note is a document that allows you to correct minor errors on a sales invoice without having to issue a correction invoice. When can it be used and who is authorized to do so? Read this article to learn the rules and avoid errors that may have tax consequences. What is an invoice correction note? Read more…
National e-Invoice System (KSeF) new integration libraries for JAVA and .NET We are very pleased to announce that we have made available two more client libraries for JAVA and .NET languages, which facilitate and accelerate the integration of systems with the National e-Invoice System. These are the next tools after the KSeF REST API interface and the PHP library that we make available Read more…
Part 1: The New Landscape of the National System for E-Invoices: A Strategic and Pragmatic Relaunch. The introduction of the National System for E-Invoices (KSeF) in Poland is undergoing a fundamental transformation. The initial vision of implementation, based on a "big-bang" model, has given way to a more flexible, phased, and consultative approach. This change is not merely a technical adjustment, but a strategic reset, forced by technological realities and dialogue. Read more…
The amendment to the VAT Act requires settlements using the National e-Invoice System. From February 1, 2026, the system will cover businesses in the country whose sales value of goods and services in the previous year exceeded PLN 200 million. As announced by the Ministry of Finance and in connection with the amendment to the legislation, Read more…
Business owners seeking new opportunities for expansion and increased revenue often decide to partner with foreign partners. However, when selling goods to customers outside of Poland, many questions arise regarding the correct settlement principles for such transactions. How do you properly account for VAT on foreign invoices? What obligations do these impose on companies? Read more…
The current KSeF 2.0 Implementation Plan in Poland – Deadlines, Requirements and Schedule Introduction: Understanding KSeF – What you need to know about the upcoming changes The National e-Invoice System, better known as KSeF, is a revolutionary change in the Polish tax system, introducing the obligation to issue and receive invoices in a structured electronic form via a central platform Read more…
National e-Invoice System (KSeF) new integration library for PHP In addition to the REST API interface, the availability of which we informed you in the previous entry (KSeF REST API), we have prepared a library for the PHP language, which enables integration with our KSeF REST API interface. It is already available for download directly after going to the Download tab. We are working Read more…
KSeF REST API dedicated interface for the National e-Invoice System We would like to inform you that we have made available a REST API interface containing operations allowing for quick and effective integration with the National e-Invoice System (KSeF). The implemented operations enable the implementation of the main functionalities related to the handling of structured invoices in KSeF, i.e.: Generating e-Invoices in the XML format in accordance with Read more…
Summary of KSeF consultations in the area of communication and information exchange In accordance with our earlier announcement regarding the KSeF schedule, as part of consultations on the National e-Invoice System (KSeF), today we will present you a short summary of consultations organized on March 1, 2024 by the Ministry of Finance under the name KSeF Consultations – explanations, interpretations and training. Discussed at the meeting Read more…