Invoice Issuing Deadlines in the National e-Invoice System (KSeF)

• KSeF is a teleinformatics system used for issuing, receiving, storing, accessing, and marking structured invoices.
• Invoices must be issued no later than the 15th day of the month following the month of supply or service.
• Special deadlines apply for certain types of services, such as construction services or delivery of printed books, newspapers, and magazines.
• In some cases, invoices must be issued within specific timeframes, such as within 30 days of service execution or within 7 days of specified return dates.
• Invoices for certain services are issued after the payment deadline.
• Starting from July 1, 2024, taxpayers will be required to issue structured invoices.

Source: pit.pl

Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.

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