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In accordance with the Order of the Minister of Finance, taxpayers are obliged from 1 July 2016 to generate SAF-T files.  

The Order means that all companies will have to adapt their IT systems so that they are able to report a broad data set. Onwelo aims to meet the needs of Polish businesspeople by supporting them in all aspects of preparing their companies to generate SAF-T structures and communicate with the Ministry of Finance.

By 2018, all groups of businesspeople will be obliged to submit SAF-T files. Large companies, who will be obliged to report in this way from 1 July 2016, are first in line. From 1 July 2018 all businesspeople in Poland will be obliged to send data in the form of a SAF-T file.


OnTax is a dedicated SAF-T reporting platform that makes it possible to gather essential data, to test them, and to generate the structures required by the tax authorities. The solution is not dependent on source systems and can be fully integrated with them. OnTax is aimed at the following potential users:

  • Large companies
  • SMEs
  • Banks
  • Accounting offices

OnTax functionality

Advanced platform

Access via Internet browsers and mobile devices

Secure login

With username and password

A superior platform

Available in a variety of hosting variants (cloud, standalone)


With the various sources and data types essential in SAF-T reporting


Of each step taken when generating SAF-T reports

Verification of data supplied


Create your own mappings


Overview, preview and data verification


Cyclical generation of SAF-T files with the option to generate them at any time


Export of SAF-T reports to supervisory bodies


Transformation of SAF-T reports into .xml format


Report repository with option to preview and download SAF-T files

Cooperation models

Before we begin

The OnTax reporting platform for SAF-T can either be installed on a company’s server, or used according to the SaaS model. Whichever cooperation model they choose, companies can be certain of receiving continuous updates and full compliance with the requirements introduced by the Ministry of Finance for SAF-T files.

The next steps

  • Business analysis to identify the data in the finance and accounting systems, including: SAP, Oracle EBS, Microsoft Dynamics AX
  • Devising IT solutions to obtain the data needed to generate SAF-T files
  • Implementing the SAF-T reporting system based on the dedicated OnTax platform
  • Supporting communication with the Ministry of Finance and the repository of sent SAF-T files
  • Thorough data tests to identify areas that might require adaptation of processes within the company
  • Maintaining the application and ensuring compliance when there are changes to the law on SAF-T files
OnTax brochure
OnTax leaflet

Bartosz Czyż

Business Unit Director

+48 735 919 800

Bartosz Czyż Business Unit Director