Expert service · Tax compliance

Verifactu, SII and TicketBAI
native in your business

Full tax compliance for Spanish companies. We implement AEAT-certified Verifactu, automatic SII, TicketBAI for Euskadi and Navarra, FACe and factura-e — with direct integration into your management system.

The obligations every Spanish company must meet

Spanish tax legislation requires companies to adapt their invoicing systems. Non-compliance leads to penalties and reputational risks.

Verifactu is already mandatory

The Anti-Fraud Law requires all invoicing software to generate verifiable records with the AEAT. Operating without Verifactu entails fines of up to €50,000 per non-compliant system.

SII requires immediacy

Companies subject to SII must submit VAT records within 4 days. A disconnected or manual system causes errors, delays and requests from the AEAT.

TicketBAI: four territories, four sets of rules

Each Basque regional treasury and Navarra has its own technical specifications. Incorrect implementation invalidates invoices and can result in differentiated regional penalties.

Complete tax compliance, from start to finish

We cover all current electronic invoicing obligations in Spain, with official certifications and direct integration into your technology environment.

AEAT-certified Verifactu

System approved by the Tax Agency. We generate the hash for each invoice, the event log and real-time submission to the AEAT verification system.

Automatic SII

Automated submission of issued and received invoice ledgers to the AEAT within the legal deadline. No manual intervention, no transcription errors, with record reconciliation.

TicketBAI — Euskadi and Navarra

TicketBAI certification for Bizkaia, Gipuzkoa, Álava and Navarra. We generate the signed XML, the verification QR code and the connection to the corresponding regional treasury.

FACe and factura-e B2G

Issuance of electronic invoices to public administrations through the FACe general entry point, in factura-e format (XSig). Mandatory for suppliers to the Public Administration.

Factura-e B2B

Electronic invoice exchange between companies in standard format. Reduction of administrative costs, greater traceability and preparation for the upcoming mandatory B2B requirement.

Integration with your ERP

We connect all compliance systems to your current management platform. Without changing your ERP, without double data entry, with centralised auditable logs.

How we work

A structured process that minimises risk and maximises compliance certainty from day one.

Regulatory diagnosis

We audit your current situation: which obligations apply to you (Verifactu, SII, TicketBAI), what system you use and what gaps exist with respect to current regulations.

System configuration

We implement and configure the necessary compliance modules, integrating them with your existing ERP or invoicing system. Dedicated test environment included.

Testing and certification

We validate the system in the AEAT and corresponding regional treasury test environments. We certify each integration before activating it in production.

Go-live

We activate the system in production with support during the first days. Full documentation and training for the administrative team for day-to-day operations.

Mandatory for any company invoicing in Spain

Since 2025, Verifactu affects all companies and self-employed individuals using invoicing software. SII applies to large companies and VAT groups. TicketBAI is mandatory in Euskadi and Navarra. Preparation is not optional.

  • SMEs and self-employed individuals using invoicing software
  • Large companies subject to SII
  • Companies operating in Euskadi or Navarra (TicketBAI)
  • Public Administration suppliers (FACe / factura-e)
  • Companies preparing for the mandatory B2B factura-e transition
Applicable regulation
Ley 11/2021 Antifraude

The reform requires all invoicing programmes to incorporate Verifactu or equivalent systems. The AEAT publishes the official technical specification and carries out the approvals.

Deadlines
In force since 2025

The adaptation deadlines for already-commercialised software have come into force. Do not wait until you receive a notice. Implement now and avoid penalties.

Everything you need to know about tax compliance

What is Verifactu and when is it mandatory?

Verifactu is the verifiable invoicing system required by the AEAT for invoicing software since the reform of the Anti-Fraud Law (Ley 11/2021). It requires every invoice to be recorded and submitted to the AEAT with a unique verification code. It is mandatory for all companies and self-employed individuals using invoicing software from 2025, with staggered adaptation deadlines depending on the type of taxpayer and software used.

What is the difference between SII and Verifactu?

The SII (Immediate Supply of Information) requires companies with a turnover exceeding €6 million, VAT groups and voluntary registrants to submit VAT ledgers to the AEAT in near real time (4 working days). Verifactu, on the other hand, applies to invoicing software and guarantees the traceability and integrity of each issued invoice. Both obligations can coexist and are independent of each other.

What is TicketBAI?

TicketBAI (TBAI) is the mandatory tax system in Euskadi (Bizkaia, Gipuzkoa, Álava) and Navarra that requires invoicing software to generate a digitally signed XML file for each transaction and transmit it to the corresponding regional treasury. Each territory has its own technical specifications and timetables. At The BigTech Experience we are certified for all four territories.

How long does implementation take?

The typical process ranges from 2 to 6 weeks. The initial regulatory diagnosis takes approximately one week. Configuration and integration with the existing ERP takes between 1 and 2 weeks. Testing and certification with the relevant authority requires another 1–2 weeks. Finally, the go-live phase with support closes the process. Projects with customised ERPs or multiple territories may require more time.

Does it work with any ERP?

Yes. We develop both native integrations within our own solutions and API connectors for third-party ERPs. Before starting, we carry out a technical assessment of your current system. If your ERP has a documented API or allows exporting invoices in standard formats, we can integrate it. We also offer adapters for legacy solutions without an API.

Is your company ready for mandatory electronic invoicing?

We analyse your compliance situation at no cost and tell you exactly what you need to adapt and by when. No jargon, just clarity.

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