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The implementation of the National e-Invoicing System (KSeF) is the biggest operational challenge for many companies in recent years. At Exorigo-Upos, we have focused on one key parameter from the beginning: performance. Looking at the operational data from February and March 2026, we can examine how our SmartKSeF solution handles real, large-scale workloads.
Half a second to full compliance
A key indicator of the system’s effectiveness is the processing time of a single document. On average, less than a second passes from the moment an invoice is sent to SmartKSeF to its official KSeF number (change of status from Accepted to Registered).
Although this process seems immediate from the user’s perspective, SmartKSeF performs a number of critical operations in real time in the background:
- Invoice receipt and JSON validation.
- Verification of permissions and mapping of data to XML format consistent with the logical structure of e-Invoices.
- Authorization in the KSeF gateway and file sending.
- Asking the central system for status, saving the KSeF number, and full logging of events in the database.
Operational scale: Billions of zlotys in the process
The system’s performance is best illustrated by the volume of transactions it handles. In February 2026 alone, customers using SmartKSeF issued a total of 768,794 invoices. This trend continues in March – in the first two weeks of the month alone, the system has already processed 568,221 documents.
This translates into a huge financial scale: the total amount of invoices that passed through our system in February amounted to PLN 4.2 billion.
Ready for selling peaks and multi-currency trading
Our solution has been designed for entities with high transaction volume, such as retail chains, where traffic during store hours is relatively evenly distributed. SmartKSeF has a high resistance to load spikes:
- Throughput: The system processes a record 46 thousand invoices per day so far.
- Peak performance: At peak times (peaks), SmartKSeF handles several hundred invoices per second.
- Currency support: Although the dominant currency is PLN (76% of transactions), the system efficiently processes documents in 14 other currencies.
An important part of the traffic we effectively automate also includes complex settlements within capital groups.
See also:
- Case Study of SmartKSeF implementation in a large retail chain
- How to prepare the IT infrastructure for KSeF requirements?
- Our services – Full support for digital transformation
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