E-invoicing rules for Gas/HVAC Engineers in Spain: mandatory for public-sector invoices; Verifactu from 2027

Facturae is mandatory for invoicing public administrations today. Separately, Verifactu — invoicing software that produces tamper-proof records with a QR code — becomes mandatory on 1 January 2027 for companies and 1 July 2027 for autónomos (Royal Decree-law 15/2025). The general B2B e-invoicing obligation (Crea y Crece) still awaits its implementing regulation — verify before relying on a date. Invoices to public bodies must already be electronic; B2B obligations arrive with the Crea y Crece implementing rules. The accepted format is Facturae (XML), signed. FACe for public-sector invoices. This is the position as at 8 October 2026 — e-invoicing legislation is moving quickly across the EU, so confirm against current national guidance before relying on a date. Vasco generates Facturae (XML), signed directly from an invoice, so a Gas/HVAC Engineer does not need separate software to comply.

Facturae (XML), signed. A PDF emailed to a customer is NOT a structured e-invoice — a PDF is an image of an invoice, whereas the mandate requires machine-readable data that the recipient's system can process without retyping. FACe for public-sector invoices. Vasco produces the structured file from the invoice you already raised, rather than asking you to rebuild it in a separate tool.

If you invoice any public body, you already need Facturae. Get that working before the wider B2B rule lands. Two practical points that catch out small trades businesses: being able to RECEIVE a structured invoice is often required earlier than issuing one, and 'sent' is not the same as 'accepted' — in Italy and Spain the authority can reject a filing, and a rejected invoice was never legally issued. Vasco tracks that distinction so a Gas/HVAC Engineer can see which invoices are genuinely filed and which were refused.

No. The requirement is a valid structured file in the correct format, not a particular class of software or an ERP. A self-employed Gas/HVAC Engineer can comply with a tool that produces Facturae (XML), signed correctly and keeps the audit trail. Vasco is built for one-person and small trades businesses across six European markets and generates the formats each one requires, so you are not paying for an enterprise system to satisfy a rule aimed at invoice data.