Verifactu

Verifactu is the new invoicing system that requires software to generate secure, chained invoicing records that can be verified by the tax agency. It becomes mandatory for companies from 1 January 2027 and for self-employed individuals from 1 July 2027, and using non-compliant software can lead to a fixed fine of 50,000 € per year under article 201 bis of the General Tax Law (LGT).

This obligation is set out in article 201 bis of Law 58/2003 (Ley General Tributaria), available at boe.es.

In practice, every time you issue an invoice the software creates a record with its key data and a hash that links it to the previous record. That way no invoice can be deleted or changed without leaving a trace. The invoice carries a QR code your customer can use to check it on the tax agency's website. You can send the records to the tax agency as you go, which is the Verifactu mode proper, or keep them in your own system under extra requirements.

The typical mistake is thinking it only affects people who invoice a lot. The obligation depends on using software to invoice, not on volume. Another slip is waiting until the last month to switch tools: moving customers, series and templates takes time.

It is linked to the factura rectificativa, which also creates its own chained record, and to the register of issued invoices. kontora issues your invoices with Verifactu records.

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