What the PLN 10,000 limit actually is
First, a point that clears up a lot of confusion: the law never uses the word "micro-enterprise." That is everyday shorthand. The rule does not refer to company size or any formal micro-business definition. It refers to one number: the total gross value of the invoices you issue in a given month.
The mechanism is simple. As long as the sum of invoices you would otherwise be required to issue in KSeF stays under PLN 10,000 gross per month, you may issue them outside the system, on paper or electronically. Only B2B invoices subject to the KSeF obligation count toward the limit. Consumer sales rung up on a cash register, and simplified invoices up to PLN 450, do not count. This is confirmed in the Ministry of Finance's official guidance.
One catch matters most: crossing the limit is a one-way door. If a single month's invoicing pushes you past PLN 10,000, that invoice and every one after it must go through KSeF. There is no way back, even if the next month's turnover drops.
What the law says: the limit expires 31 December 2026
The basis is a transitional provision (Article 145m of the Polish VAT Act), introduced by the KSeF Act (Journal of Laws 2025, item 1203). It defers the obligation to issue structured invoices for the smallest volumes, but only for a transitional window ending 31 December 2026.
The timeline:
Date Who must issue in KSeF 1 February 2026 Firms with 2024 sales above PLN 200 million 1 April 2026 All other VAT payers, including sole proprietors (JDG) and SMEs 1 January 2027 The smallest firms that stayed under the PLN 10,000 limit through 2026
Note that the deferral covers issuing only. The obligation to receive invoices from KSeF applied to everyone from 1 February 2026. If you buy from a supplier already in the system after that date, their invoice lands in KSeF and you must collect it there, even while you still issue your own invoices outside the system.
Is the Ministry of Finance planning to keep the limit in 2027?
This is the heart of the title question. The short answer: nothing points to an extension.
On 9 June 2026, the Ministry of Finance held consultations on KSeF changes for 2027 and prepared a package of seven amendments. Most are technical: longer validity for authorization tokens, a requirement to quote the KSeF number in payments, additional business context inside invoices, and changes to database query limits. Extending the PLN 10,000 transitional window is not in that package.
The Ministry has also stated repeatedly that it does not plan to postpone the KSeF start date again, despite appeals from some businesses and accountants. That is not a guarantee. The rules could still change before the end of 2026, and there have been past pushes for further delays. But planning your 2027 around an assumption that the limit "will surely stay" would be risky. The safer working assumption is that from 1 January 2027 the limit simply will not exist.
What actually changes on 1 January 2027
That date ends the education period. Three things happen at once:
Full obligation to issue in KSeF for everyone who had been relying on the PLN 10,000 limit.
Financial penalties for failing to issue an invoice in the system: up to 100% of the tax amount or about 18.7% of the invoice value.
KSeF number in payments covered by the split-payment mechanism.
For a business that stayed under the limit all through 2026 and never touched the system, this means going from zero to full compliance overnight. That is the worst possible moment to start learning certificates, authentication, and the FA(3) invoice schema.
Example: the florist who crossed the limit in July
The Ministry of Finance uses the example of a florist issuing three monthly invoices of PLN 1,500, PLN 2,000, and PLN 2,500, totaling PLN 6,000. She stays under the limit, so her KSeF obligation only begins on 1 January 2027.
But one unusual month is enough. If in July 2026 she issues invoices totaling PLN 10,100, then from the invoice that crosses the threshold she must issue in KSeF, and she stays in the system permanently, even if August drops back to PLN 6,000. "Staying under the limit" is therefore not a strategy but a temporary state that can end with the first larger order.
How to prepare now
Register in KSeF and test issuing an invoice in the test environment before you have to do it under pressure.
Get a certificate or signature for authentication (Profil Zaufany, a qualified signature, a qualified seal, or a KSeF certificate). A PESEL number alone is not enough.
Start collecting purchase invoices from KSeF today. This is mandatory from 1 February 2026, limit or no limit.
Track your monthly B2B invoice value so you know when you are approaching PLN 10,000.
Do not assume the limit survives 2027. Treat 1 January 2027 as the hard cutoff and prepare with margin.
Check that your invoicing tool handles FA(3), offline mode, and the UPO (the official confirmation of receipt) before the system becomes mandatory.
Conclusion
The PLN 10,000 limit is a bridge for the transition, not a lasting exemption. Under current law it expires on 31 December 2026, and the June 2026 consultations gave no signal that it will be kept. From 1 January 2027, KSeF applies to everyone, penalties included. Rather than counting on another delay, it is far calmer to test the system through 2026.
With Biurko you can issue FA(3)-compliant invoices, pull purchase documents from KSeF, and see how certificate-based authentication works before any of it is mandatory. Create a free account and move to KSeF on your own terms, not against a deadline.
FAQ
Will the PLN 10,000 limit disappear in 2027? Under current law, yes. It is a transitional provision in force until 31 December 2026. From 1 January 2027 the obligation to issue invoices in KSeF applies to all taxpayers, regardless of monthly sales value. The Ministry of Finance has not announced an extension.
Who can issue invoices outside KSeF in 2026? Any taxpayer whose total gross value of KSeF-obligated B2B invoices stays under PLN 10,000 in a given month. Those can be issued on paper or electronically. Consumer sales and cash-register receipts do not count toward the limit.
What happens if I cross PLN 10,000 in one month? From the invoice that crosses the threshold, you must issue in KSeF, and so must every invoice after it. There is no return to issuing outside the system, even if the next month's turnover falls below the limit.
Will the Ministry of Finance extend the deferral for small firms? Nothing suggests it will. The KSeF change package consulted on 9 June 2026 does not include extending the PLN 10,000 limit, and the Ministry has said it does not plan to postpone the start date again. Until any amendment, the operative date is 1 January 2027.
Do I still have to receive KSeF invoices as a small business in 2026? Yes. The deferral covers issuing only. The obligation to receive invoices from KSeF applied to all taxpayers from 1 February 2026. If you buy from a company already in the system, their invoice goes to KSeF and you must collect it there.