How do I integrate with Spain accounting software?

Apideck's Unified Accounting API lets you integrate with 8+ Spain accounting platforms through a single API. Sign up, enable the connectors you need, and use one standardized data model to read and write invoices, payments, contacts, and more.

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Spain accounting integrations

Q: What accounting software is popular in Spain?

The most popular accounting platforms in Spain include Odoo, Sage Business Cloud Accounting, Xero, QuickBooks, NetSuite. Holded and Odoo are popular cloud accounting choices in Spain, while Sage, including Contaplus/Sage 50, remains the long-established incumbent across SMB and mid-market. Local tools like a3innuva and Contasol are common among gestorías, and compliance is shaped by SII real-time VAT reporting, the Veri*Factu certified-billing system and an upcoming B2B e-invoicing mandate.

Holded and Odoo are popular cloud accounting choices in Spain, while Sage, including Contaplus/Sage 50, remains the long-established incumbent across SMB and mid-market. Local tools like a3innuva and Contasol are common among gestorías, and compliance is shaped by SII real-time VAT reporting, the Veri*Factu certified-billing system and an upcoming B2B e-invoicing mandate.

8 supported accounting platforms + 9 on the radar

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Spain accounting software market

Where the major platforms sit and which Apideck supports today. Figures are company-reported unless marked as an estimate.

3,310,824

active enterprises in Spain as of January 1, 2025; 81.6% have two or fewer employees

INE, Directorio Central de Empresas (DIRCE), 2025

Platform	Spain market position	Apideck	Source
Holded	80,000+ Spanish businesses at time of 2021 Visma acquisition; cloud all-in-one accounting/invoicing suite	Supported	El País / Wikipedia (Holded)
Sage (Contaplus/Sage 50 Spain, Sage 200, Sage X3, Sage XRT)	Long-established incumbent across Spanish SMB and mid-market accounting	On the radar	Sage
a3innuva (Wolters Kluwer) and Contasol	Long-tail, locally built accounting software common among Spanish gestorías and SMEs	On the radar	Wolters Kluwer Spain
International challengers (QuickBooks, Xero, Odoo, Zoho Books)	Long-tail cloud entrants alongside local incumbents	Supported	Apideck integration coverage

Subscriber and customer counts are the best available public indicators and may include accountant-managed multi-entity accounts; they are not a direct count of distinct businesses. Estimates are marked accordingly.

Spain accounting compliance requirements

Spain is layering three overlapping digital tax regimes: SII real-time VAT reporting for large taxpayers, the new Veri*Factu certified-billing-software system rolling out through 2027 for everyone else, and a separate B2B e-invoicing mandate under the Crea y Crece law phasing in from 2027-2028.

Veri*Factu (Sistemas Informáticos de Facturación)

Businesses and self-employed professionals not already under SII must use certified billing software that generates tamper-evident invoice records with QR codes and reports them to the tax agency, mandatory from January 2027 for companies and July 2027 for sole traders.

Agencia Tributaria (AEAT)

SII (Suministro Inmediato de Información)

Large companies and VAT-group members must submit VAT invoice records to the tax agency within four days of issuance and are exempt from Veri*Factu as a result.

Agencia Tributaria (AEAT)

B2B e-invoicing mandate (Ley Crea y Crece, Royal Decree 238/2026)

Domestic B2B transactions between Spanish-established businesses must use electronic invoicing, phasing in for large companies (over 8M euro turnover) from October 2027 and all other businesses from October 2028.

Boletín Oficial del Estado (BOE-A-2026-7295)