Invoicing software
that complies with Verifactu.

Verifactu is the name commonly given to the regulation requiring invoicing software to meet a set of technical requirements laid down by the Spanish tax authorities (Hacienda). It is governed by Real Decreto 1007/2023 (Royal Decree 1007/2023), and Real Decreto-ley 15/2025 (a Royal Decree-law, an urgent government decree with the force of law) set the deadlines currently in force:

• Companies that file Corporate Income Tax (Impuesto sobre Sociedades): before 1 January 2027.
• Everyone else, including the self-employed (autónomos): before 1 July 2027.

You can check this in the information notice from the Spanish Tax Agency (Agencia Tributaria) (in Spanish). This is the second postponement, and it's best not to count on a third.

At Marketizados we build software. We have our own invoicing software, developed in-house and adapted to Verifactu, and we build custom invoicing systems for companies that need something a standard package can't give them.

Who Verifactu affects.

Almost any company or self-employed person that issues invoices using a computer program, whether that's invoicing software, an ERP or a custom spreadsheet built years ago.

It doesn't apply to those who already send their invoices through the Immediate Supply of Information system (Suministro Inmediato de Información, SII), taxpayers under the regional tax regimes of the Basque Country and Navarre, which have their own systems, or anyone who invoices by hand. But be careful: invoicing "by hand" with a Word or Excel file that calculates the amounts doesn't always exempt you, and in practice almost nobody truly invoices by hand.

What your invoicing software has to do.

The rules don't change which invoices you issue, but how the software stores them. In short, every time an invoice is issued the system must:

• Generate a record of that invoice with a digital fingerprint (hash) chained to the previous one, so no invoice can be deleted or altered without it showing.
• Print a QR code on the invoice, whether full or simplified, so the customer can check it on the tax authority's website.
• Keep an event log: who did what, and when.
• Display the legend «Factura verificable en la sede electrónica de la AEAT» ("Invoice verifiable on the AEAT website") or «VERI*FACTU» when working in that mode.

There are two ways to comply. In Verifactu mode, the software sends each record to the tax authority as it happens. In the other, records are stored in your own system, electronically signed, and handed over if the tax authority requests them. The first is simpler to maintain; the second requires more controls.

What happens if you don't adapt.

Law 11/2021 against tax fraud added specific penalties for this to Spain's General Tax Act (Ley General Tributaria). Using software that doesn't comply can cost €50,000 per financial year. For those who make or sell non-compliant software, €150,000 per financial year and per type of software.

It isn't a fine per invoice, it's per year. And any compliant software must come with a statement of compliance (declaración responsable) from its maker: always ask for it before signing up.

Our invoicing software.

We developed it ourselves, so we know exactly what it does under the hood and we adapt it when the rules change. It issues full and simplified invoices with the QR code and chained records that Verifactu requires, and it's designed for companies and self-employed people who want to invoice without complications.

You don't depend on a software giant that changes its terms whenever it likes: you talk to the people who wrote it. If you'd like to see it working before you decide, ask us for a demo.

Custom invoicing software.

For some companies a standard package just doesn't work: they invoice in a particular way, have complex pricing, need invoices to be generated automatically from their order system or online store, or run an old ERP they don't want to throw away.

For them we build custom invoicing software. It can be a complete program or a component that connects to what you already use —your ERP, your CRM, your online store— so your invoices comply with Verifactu without changing the way your team works.

And if you want quotes, delivery notes and invoices to stop eating up hours, we explain it in automating quotes and invoices: where to start (in Spanish).

Don't leave it until December.

The deadlines seem far off, but adapting a company's invoicing isn't done in an afternoon: you have to choose the software, migrate the data, test it with real invoices and get the team used to it. If you wait until the last quarter, you'll be doing it in a rush with every supplier overloaded.

Starting now gives you room to do it properly.

More about Verifactu.

• What Verifactu is and when it becomes mandatory (in Spanish)
• Verifactu for the self-employed: does it affect me? (in Spanish)
• Invoicing with Excel or Word: is it valid under Verifactu? (in Spanish)
• Verifactu penalties: what the fines are and why (in Spanish)
• How to choose Verifactu invoicing software (in Spanish)