Mandatory electronic invoicing in Spain: timeline and how to prepare

Business-to-business electronic invoicing in Spain is shifting from an efficiency option to a progressive legal obligation. The Crea y Crece Act and its implementing rules push structured exchange that reduces late payment and improves traceability. This guide helps SMEs, freelancers and advisors prepare.

From emailed PDFs to structured invoices

For years, “electronic invoice” loosely meant a signed PDF or a scan. The mandatory model points to structured formats that systems can validate and post into accounting and treasury, with acceptance statuses and lifecycle traceability.

That changes processes: customer onboarding, numbering, taxes, credit notes, archiving and bank reconciliation. It also changes the relationship with advisors, who receive cleaner data when the source system is solid.

Who is impacted and what to watch

Rollout is staged by thresholds and calendars under the applicable rules. Regardless of the exact date that applies to you, do not wait: migrating master data, training staff and testing integrations takes weeks or months in businesses with multiple sales channels.

Pay attention to:

• B2B versus B2C (different regimes).
• Public-sector transactions (Facturae / FACe already familiar).
• Freelancers invoicing companies.
• Multi-company groups and different series per site.

Fit with Verifactu and anti-fraud rules

Mandatory electronic invoicing and Verifactu reinforce each other but pursue different goals. You need a system that can issue in a verifiable way and interoperate in the electronic ecosystem. A vendor that only produces pretty PDFs does not cover the full scenario.

Facturatum combines professional invoicing with a Verifactu/SIF focus, multi-company support and accounting features. Also evaluate APIs, history import and user roles to avoid admin bottlenecks.

A realistic migration plan

1. Diagnosis

List current software, monthly volume, invoice types, integrations (e-commerce, CRM, ERP) and exceptions (proformas, credit notes, tickets).

2. Master data

Normalise tax IDs, addresses, receiving emails, payment methods and taxes. Master-data quality determines electronic-exchange success.

3. Pilot

Choose a subset of collaborative customers and issue in parallel for a period. Measure validation incidents and collection times.

4. Training and procedure

Define who issues, who approves, who handles rejections and how archiving works. Document the credit-note flow.

5. Switch-off the old channel

Only when the pilot is stable. Running two worlds indefinitely increases errors.

Business benefits beyond compliance

• Fewer typing and VAT errors.
• Better visibility of invoice status and late payment.
• Faster accounting closes.
• Less dependence on messy email inboxes.
• A solid base to automate reconciliation and reporting.

Risks of improvising

Issuing late with unprepared tools, losing acceptance traceability or failing to prove integrity in an inspection are avoidable scenarios. So is choosing software without real support: invoicing is critical to getting paid.

Mandatory e-invoicing is a financial infrastructure change. Treat it as a project (data, processes, people, technology) and you will arrive with margin; treat it as a last-minute plugin and you will accumulate operational friction.

Pre-launch checklist

Before switching off PDF-by-email: validate active customer tax IDs, test credit notes, check series and counters, verify legal archiving and rehearse a rejection. Inform regular customers of the new channel and what to do if receipt fails.

Working with marketplaces and POS

If you sell through platforms or tills, map which system is the invoice issuer of record. Fragmented issuance is a common Verifactu and e-invoicing failure mode. Align series, tax mapping and corrective flows across every channel before the legal cutover.

Document a temporary plan B with your advisor so invoicing does not stop if the vendor has an incident.

To design your migration, write to /contacto or review Facturatum and our mandatory electronic invoicing guide.