2,281,478 invoice issuers
KSeF had 2,281,478 invoice issuers as of 30 June 2026.
Government of Poland (gov.pl)4,491,164 domestic recipients
4,491,164 domestic buyers appeared on invoices in KSeF as of 30 June 2026.
Government of Poland (gov.pl)87 million invoices (first two months)
In KSeF's first two months, more than 345,000 entities issued invoices, of which only about 5,000 were firms obliged to use it from 1 February, and the system accepted more than 87 million invoices.
Polish Ministry of Finance (KSeF portal)Why this market is moving now
- Receiving invoices through KSeF has been mandatory for all firms since 1 February 2026.
- Firms with 2024 sales up to PLN 200 million joined the issuing duty on 1 April 2026.
- The smallest taxpayers (monthly invoiced sales up to PLN 10,000) must issue in KSeF from 1 January 2027.
- No sanctions apply for KSeF mistakes in 2026.
Key figures
Each figure links to the page it came from.
| Figure | Value | Year | Source |
|---|---|---|---|
| KSeF held 512,750,280 invoices as of 30 June 2026. | 512,750,280 invoices | 2026 | Government of Poland (gov.pl) |
| KSeF had 2,281,478 invoice issuers as of 30 June 2026. | 2,281,478 invoice issuers | 2026 | Government of Poland (gov.pl) |
| 4,491,164 domestic buyers appeared on invoices in KSeF as of 30 June 2026. | 4,491,164 domestic recipients | 2026 | Government of Poland (gov.pl) |
| In KSeF's first two months, more than 345,000 entities issued invoices, of which only about 5,000 were firms obliged to use it from 1 February, and the system accepted more than 87 million invoices. | 87 million invoices (first two months) | 2026 | Polish Ministry of Finance (KSeF portal) |
| More than 345,000 entities had issued invoices in KSeF by 30 March 2026, though only about 5,000 were firms obliged to use it from 1 February. | 345,000 entities | 2026 | Polish Ministry of Finance (KSeF portal) |
| From 1 April 2026, all businesses with 2024 sales up to PLN 200 million had to use KSeF to issue invoices; businesses above that level started on 1 February 2026. | 200 PLN million (2024 sales threshold) | 2026 | Polish Ministry of Finance (gov.pl) |
| Taxpayers whose monthly invoiced sales do not exceed PLN 10,000 gross start issuing in KSeF only on 1 January 2027. | 10,000 PLN gross monthly sales | 2027 | Polish Ministry of Finance (gov.pl) |
| The obligation to receive invoices through KSeF has applied to all firms since 1 February 2026. | 1 February 2026 | 2026 | Polish Ministry of Finance (gov.pl) |
| No sanctions are imposed for mistakes made while using KSeF in 2026. | 0 sanctions in 2026 | 2026 | Polish Ministry of Finance (gov.pl) |
| More than 306,000 firms were issuing invoices in KSeF voluntarily just before the 1 April 2026 second stage. | 306,000 firms (voluntary) | 2026 | Polish Ministry of Finance (gov.pl) |
Companies to watch
Comarch
Polish software group; its ERP site has a KSeF integration page and a free KSeF communication period for ERP customers. Source: https://www.comarch.pl/erp/ksef/
Fakturownia
Polish online invoicing tool; its site offers a free KSeF integration. Source: https://fakturownia.pl/ksef
ifirma
Polish invoicing and online accounting service; its home page title advertises a program for handling KSeF. Source: https://www.ifirma.pl/
Symfonia
Polish business software vendor with a dedicated KSeF section in its site navigation. Source: https://www.symfonia.pl/
What the full report covers
- 1
Executive summary
The answer on two pages: size, growth and what drives it.
- 2
Market size and outlook
History, the current year and a five-year view with base, low and high cases.
- 3
Segments and regions
Splits by product, buyer and geography across the US, Europe and MEA.
- 4
Company profiles
The main players, how they compete and where they are investing.
- 5
Data and method
Every figure in Excel, with the sources and assumptions behind it.
- 01Executive summary
The answer in one page: size, direction and what moves it - 02Market definition and scope
What is in and out of the European Union market - 03Market size, 2021 to 2025
Historical series and growth rates - 04Outlook to 2031
Base, low and high scenarios with stated assumptions - 05Rules, policy and deadlines
Regulation and programmes that change demand - 06Drivers and barriers
What accelerates or slows adoption, by customer segment - 07Prices, costs and margins
Unit economics where public data allows - 08Competitive landscape
8 to 12 company profiles with recent moves - 09Opportunities and risks
For new entrants, suppliers and investors - 10Method and sources
Every assumption and source, listed
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Frequently asked questions
When did KSeF become mandatory in Poland?
The Polish Ministry of Finance launched KSeF on 1 February 2026. Large firms had to issue invoices through it from that date and most other firms from 1 April 2026.
How many invoices are in KSeF?
The Polish government reports 512,750,280 invoices in KSeF as of 30 June 2026, issued by 2,281,478 issuers.
Which Polish firms start in 2027?
Taxpayers with monthly invoiced sales of PLN 10,000 gross or less issue invoices in KSeF from 1 January 2027, per the Ministry of Finance.
Are there penalties for KSeF mistakes?
Not in 2026. The Ministry of Finance says no sanctions will be imposed for mistakes made while using KSeF in 2026.
How fast did KSeF grow?
In its first two months KSeF accepted more than 87 million invoices from more than 345,000 entities, according to the Ministry of Finance.
Sources and method
The figures on this page come from the public sources listed below. Read how we work.
- Government of Poland (gov.pl): P35 - Krajowy System e-Faktur (KSeF) - Priorytety - Portal Gov.pl (2026-06-30)
Aktualna liczba faktur w systemie wynosi 512 750 280, a liczba wystawców faktur wynosi 2 281 478.
- Government of Poland (gov.pl): P35 - Krajowy System e-Faktur (KSeF) - Priorytety - Portal Gov.pl (2026-06-30)
Aktualna liczba faktur w systemie wynosi 512 750 280, a liczba wystawców faktur wynosi 2 281 478.
- Government of Poland (gov.pl): P35 - Krajowy System e-Faktur (KSeF) - Priorytety - Portal Gov.pl (2026-06-30)
liczba odbiorców krajowych występujących na fakturach wynosi 4 491 164
- Polish Ministry of Finance (KSeF portal): 1 kwietnia rusza II etap wdrożenia Krajowego Systemu e-Faktur (2026-03-30)
W trakcie pierwszych dwóch miesięcy przyjęliśmy ponad 87 mln faktur
- Polish Ministry of Finance (KSeF portal): 1 kwietnia rusza II etap wdrożenia Krajowego Systemu e-Faktur (2026-03-30)
Faktury w systemie wystawiło ponad 345 tys. podmiotów, z czego jedynie około 5 tys. to firmy, które zostały objęte obligatoryjnym stosowaniem systemu od 1 lutego.
- Polish Ministry of Finance (gov.pl): Drugi etap wdrożenia Krajowego Systemu e-Faktur (2026-03-26)
Od 1 kwietnia z KSeF korzystać będą wszyscy przedsiębiorcy, u których wartość sprzedaży w 2024 r. nie przekroczyła 200 mln zł.
- Polish Ministry of Finance (gov.pl): Drugi etap wdrożenia Krajowego Systemu e-Faktur (2026-03-26)
Nie dotyczy to podatników, u których miesięczna wartość sprzedaży udokumentowanej fakturami nie przekracza 10 tys. zł. brutto.
- Polish Ministry of Finance (gov.pl): Drugi etap wdrożenia Krajowego Systemu e-Faktur (2026-03-26)
Obowiązek odbierania faktur w systemie wszedł w życie od 1 lutego 2026 r.
- Polish Ministry of Finance (gov.pl): Drugi etap wdrożenia Krajowego Systemu e-Faktur (2026-03-26)
Przypominamy, że za 2026 r. nie będą nakładane sankcje za błędy popełnione podczas korzystania z KSeF.
- Polish Ministry of Finance (gov.pl): Drugi etap wdrożenia Krajowego Systemu e-Faktur (2026-03-26)
Obecnie jest to ponad 306 tys. firm.
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