Businesses default to a monthly filing frequency, using the JPK_V7M (the integrated SAF‑T + VAT return).
Quarterly filing via JPK_V7K is available only to small taxpayers — those with global turnover below EUR 1.2 million and having filed monthly returns for at least 12 months, and who do not supply goods subject to special regulations (e.g., Split Payment Mechanism items) exceeding certain thresholds.