Tax Inspection in Spain (Inspección Tributaria)

What Is a Tax Inspection in Spain?

A tax inspection (inspección tributaria) is the most comprehensive investigative tool available to the AEAT. When the AEAT opens a formal inspection, it appoints a team of tax inspectors (inspectores de Hacienda) who have broad powers to request documentation, visit business premises, interview employees, and access third-party databases to verify whether a taxpayer’s filings accurately reflect their true tax position.

The inspection covers not just the accuracy of numbers but also the legal qualification of transactions — for example, whether a service fee paid to a related party is genuinely arm’s-length, whether a real estate transaction has been correctly classified for transfer-pricing or VAT purposes, or whether the taxpayer qualifies for a deduction they have claimed.

How It Works in Spain

Types of Tax Verification Procedures

The Spanish General Tax Law (Ley 58/2003) distinguishes several types of AEAT verification procedure:

Opening an Inspection: The Notification

A formal inspection begins with an acta de inicio (opening notice) sent by the AEAT, which specifies the taxpayer, the taxes under investigation, and the tax years covered. From the date of this notice:

• The statute of limitations is interrupted and effectively restarts for the years under inspection
• The taxpayer is required to cooperate and provide documents within the deadlines set by inspectors
• The taxpayer retains the right to legal representation and may appoint an authorised tax adviser (asesor fiscal) to act on their behalf

Duration of the Inspection

The standard maximum duration of a tax inspection is 18 months from the opening notice. This can be extended to 27 months for the largest or most complex taxpayers (those consolidated in the Delegation for Large Taxpayers — DCGC). Extensions are possible for specific cause, and periods during which the taxpayer causes delays (by failing to provide documents on time) are excluded from the count.

The Assessment: Actas

At the conclusion of an inspection, the inspector issues an acta (assessment notice) with one of three outcomes:

• Acta con acuerdo (agreed settlement): A negotiated outcome where the taxpayer and inspector agree on the assessment and penalty, resulting in a 50% penalty reduction.
• Acta de conformidad (compliance notice): The taxpayer accepts the inspector’s proposed additional tax and interest, receiving a 30% penalty reduction.
• Acta de disconformidad (disagreement notice): The taxpayer contests the assessment. The inspector escalates to a supervisor who issues a formal resolution, which can then be appealed through the administrative economic-administrative courts (TEAR/TEAC) and subsequently through the judiciary.

Key Regulations

• Ley 58/2003 (Ley General Tributaria), Articles 141–159: tax inspection powers and procedures
• Real Decreto 1065/2007 (Reglamento General de las actuaciones tributarias): detailed inspection procedure rules
• Ley 40/2015: administrative procedure framework applicable to AEAT resolutions and appeals
• Ley 27/2014 (IS), Articles 16–18: transfer-pricing and related-party transaction rules that inspectors most commonly invoke for corporate inspections
• OECD Transfer Pricing Guidelines: the AEAT explicitly follows OECD methodology in evaluating related-party pricing

Practical Implications for Foreign Investors

The DCGC (Large Taxpayers Delegation)

Companies with annual turnover above €100 million are assigned to the Delegación Central de Grandes Contribuyentes (DCGC), the AEAT’s specialised unit for large taxpayers. DCGC inspectors have deeper sector expertise and stronger cross-border information exchange capabilities. Foreign multinationals with significant Spanish operations should assume they are under continuous risk assessment by the DCGC.

Transfer Pricing: The Primary Risk

Transfer pricing between a Spanish entity and its foreign related parties is the single most common trigger for large corporate inspections. The AEAT requires contemporaneous documentation (master file and local file in line with OECD/BEPS standards), and inspectors will benchmark intercompany prices against comparable uncontrolled transactions using independent databases. Inadequate documentation accelerates both the inspection timeline and the severity of penalties.

Voluntary Disclosure and Regularisation

Before an inspection is opened, taxpayers can file complementary returns to correct prior-year errors and pay additional tax. Once the AEAT formally opens an inspection, voluntary regularisation is no longer possible for the years under examination, and penalties become unavoidable. Proactive filing of complementary returns — even with late-payment interest — is always preferable to waiting for the AEAT to discover errors.

Rights During an Inspection

Spanish taxpayers have the right to:

• Be represented by a qualified tax adviser (no obligation to deal with inspectors directly)
• Request translations or clarifications of inspection requests
• Propose alternative interpretations of legal provisions
• Access to their file (expediente) at any stage
• Appeal any assessment through administrative and judicial channels

How BMC Can Help

Our tax inspection team represents businesses and individuals throughout the AEAT inspection process — from the initial opening notice through document collection, inspector meetings, and the drafting of legal arguments in response to assessments. For foreign-owned companies, we also coordinate with the group’s head office tax team and external auditors to ensure the Spanish inspection response is consistent with global transfer-pricing policies and BEPS documentation.