Is KSeF a step towards standardizing e-invoicing across Europe?
Definitely. By introducing KSeF, Poland is aligning with EU trends in e-invoicing. Standardization means that companies operating in multiple markets…
Frequently asked questions about: National e-Invoice System (KSeF) in Poland
Will KSeF facilitate accounting in international companies?
Yes. KSeF is based on a structured e-invoice format aligned with the EU digitalization strategy (ViDA project). This means the…
How should employee expenses be handled in the context of KSeF?
Employee expenses (e.g. fuel, accommodation, business travel purchases) will be documented with structured invoices in KSeF if issued to company…
Can attachments be added to invoices in KSeF, and what are the rules?
From 1 February 2026, KSeF will allow invoices with attachments, but only in a structured format as part of the…
Will there be a dual system after 2026, with invoices partly in KSeF and partly by email or paper?
Yes, but only during the transition period and in strictly defined cases. From 1 February 2026 large companies must use…
Will paper invoices disappear for foreign customers once KSeF is introduced?
That depends on the agreement with the business partner. KSeF applies only to transactions within Poland. For foreign clients, the…
QR codes in KSeF – how many are there and what are they for?
Invoices available outside KSeF show one QR code, which allows quick access and verification of the document in the system….
What happens if KSeF is not working or the system is down?
In such cases, an offline or emergency mode applies. An invoice issued offline must be sent to KSeF no later…
How should invoices be processed if a large customer uses KSeF but a small supplier does not yet?
The rollout is phased: from 1 February 2026 the obligation will apply to the largest companies, from 1 April 2026…
Do I need to provide the KSeF ID number in the title of a bank transfer or split payment (MPP)?
The obligation to include the KSeF ID or a collective identifier in the payment title will apply in Poland starting…
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