Poland’s B2B eInvoicing mandate is set to go live in 2026. While this may feel like there’s still time, experience from other countries shows a hard truth: businesses that delay preparation face compliance risks, reporting delays and unnecessary costs.
EInvoicing readiness isn’t just a finance task, it requires join efforts across accounting, IT and logistics to ensure processes, systems and people are aligned. The clock is ticking – here’s what you need to prioritise right now.
Key actions for business:
- Build capacity to generate and transmit invoices:
Ensure your systems can issue invoices that comply with the latest XSD schema and technical specifications. Don’t underestimate data volumes – both per invoice and in aggregate – when planning transmission capacity.
- Plan for offline scenarios:
While the system requires real-time online reporting, you must also be prepared for alternative offline modes in case of downtime or disruptions.
- Adapt underlying reporting systems:
Your systems need to capture new mandatory data fields – including employee-expenses related fields and payment identifier fields – to avoid compliance gaps.
Anticipated risks
The eInvoicing mandate introduces new compliance grey areas that businesses can’t afford to ignore.
- Lack or delayed availability of KSeF may result in discrepancies and compliance risks
- Input VAT deduction entitlement may be questioned if formal requirements (such as KSeF invoice availability) are not met.
- Questions remain around timing of VAT deduction and whether substantive conditions can override formal lapses.
These risks underline why businesses must not treat 2026 as a distant deadline – it’s a near-term priority.
Practical measures to implement
To safeguard compliance businesses should strengthen their controls and validation processes:
- Introduce or adapt invoice checks to ensure all invoice requisites are available depending on the respective invoicing scenario (e.g. QR code required for supplies in scope of KSEF, but not for supplies by non-established counterparties or where documented via cash register receipts)
- Implement an invoice identifier system to confirm KSeF transmission and streamline reconciliation.
- Set up dedicated expense checks to validate employee-incurred expenses against approved business use.
- Verify that attachments match invoice data to prevent discrepancies
- Ensure payment reconciliation fields align with invoicing requirements and cash flow data.
A growing European trend
Poland’s mandate reflects the wider shift to real-time digital reporting across Europe. While automation reduces manual burden, it also raises the stakes for system reliability and data accuracy.
For cross-border businesses, the challenge is even greater: navigating Poland’s mandate alongside other countries’ evolving eInvoicing and reporting rules. Compliance can no longer be managed locally – it requires a holistic, global approach.
What you should do now
We would advise not to wait until 2026 to begin. The changes touch every layer of your business – from ERP systems to day-to-day invoice validation. Early preparation allows you to:
- Test systems against technical requirements
- Train teams on new processes
- Identify and address gaps before they put compliance at risk
EInvoicing isn’t just a regulatory obligation – it’s a transformation in how tax is managed. The companies that act now will avoid disruption and gain a compliance edge as digitsation accelerates across Europe.
Now is the time to prepare. Waiting until 2026 is too late. Book a demo of eInvoice today and see how we can help you stay compliant and ahead of the mandate.
Now is the time to prepare
Waiting until 2026 is too late. Book a demo with our experts and see how we can help you stay compliant and ahead of the the mandate.
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Authors
Darina Ivanova
Darina leads Fintua’s Tax R&D function. She has more than 20 years of experience in VAT and indirect taxes, gained across multiple areas – compliance and recovery, tax determination, consultancy and appeals. Over the course of her career, she has supported clients of all sizes – SMEs, large enterprises, and multinationals – across diverse business sectors on VAT matters on local, regional, and global level. Within the Tax R&D function, Darina ensures Fintua’s products and processes evolve sustainably in line with the dynamically changing tax landscape.
