Poland Eyes KSeF-Powered Pre-Filled VAT Returns—But Deductibility Stays With Taxpayers

Summary

• The Ministry of Finance is exploring using KSeF e-invoicing data to auto-prepare VAT returns and JPK_V7 filings, the logical next step now that all domestic B2B invoices pass through the central platform. [vatcalc.com]
• KSeF became mandatory in phases in 2026 (large taxpayers 1 Feb, all others 1 April, smallest from 1 Jan 2027), giving the tax authority most of the transactional data needed for reporting. [eu-einvoicing.com], [atl-law.pl]
• Experts caution that invoice data alone can’t capture deductibility, exemptions, partial exemption, bad-debt relief or reverse charge—so businesses remain responsible for the correct VAT treatment behind any pre-filled draft. [vatcalc.com]

Article

Poland is considering the next stage of its VAT digitalisation: using data captured by its mandatory KSeF e-invoicing platform to generate pre-filled VAT returns and JPK_V7 filings automatically. The proposal follows the phased KSeF rollout in 2026—mandatory for large taxpayers (2024 turnover above PLN 200 million) from 1 February, extended to all other VAT payers from 1 April, and reaching the smallest taxpayers on 1 January 2027—which now routes every domestic B2B invoice through the government system. With that transactional data in hand, drafting returns appears a natural progression, mirroring similar moves in Portugal and elsewhere in the EU. But tax experts warn that VAT compliance is not simply summing invoice values: partial-exemption calculations, bad-debt relief, reverse-charge analyses, intra-group arrangements, imports and customs data rarely appear on an invoice. A pre-filled return is only as accurate as the legislative logic behind it, so businesses will still need robust tax determination to confirm the underlying treatment is correct.

Sources

• vatcalc
• EU E-Invoicing Hub
• Avalara

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