Joint Tax Audits — Coordinated Multi-Jurisdiction Audits

Joint Tax Audits (JTAs) are coordinated, simultaneous examinations in which the tax authorities of two or more countries participate to jointly investigate cross-border tax issues. Unlike simultaneous tax examinations (STEs), where authorities audit in parallel but independently, JTAs see auditors from both countries operating as a single joint audit team with a coordinated examination plan.

• Efficiency: Avoids duplication of work and contradictory findings
• Speed: Shorter audit duration than sequential national audits
• Legal certainty: Greater acceptance of outcomes, fewer MAP cases
• Information exchange: Based on treaty Articles 26 (exchange of information) and 25 (MAP)

Joint audits were initially conducted bilaterally on the basis of treaty exchange-of-information provisions. The OECD published Module 5 on Simultaneous Tax Examinations in 2006 as part of the Manual on Exchange of Information. The OECD Forum on Tax Administration (FTA) published dedicated JTA guidance in 2019. The BEPS project indirectly enhanced JTA capacity: Action 13 (CbCR) provides data for risk assessment, while Action 14 (improving MAP) recommends JTAs as a tool for dispute prevention. Within the EU, the legal framework was significantly strengthened by Directive 2021/514 (DAC7), which from 2024 placed coordinated audits in the EU on a harmonised legal basis.

JTAs apply to all taxpayers (individuals and companies) with cross-border facts when two or more tax authorities have a shared audit interest. Typical use cases:

• Multinational enterprises with complex transfer pricing structures
• Suspected profit shifting or artificial structures
• Large groups showing conspicuous profit distributions in their CbCR

Within the EU, JTAs can be conducted under DAC7 (Art. 12a–12b of Directive 2011/16/EU) even without a bilateral tax treaty.

• Existence of a shared audit interest among the participating tax authorities
• Agreement of all participating tax authorities to conduct a JTA
• Legal basis: tax treaty (Art. 25/26) or EU DAC7 (Art. 12a–12b of Directive 2011/16/EU)
• Preparation of a joint audit plan with coordinated examination steps
• Clarification of each tax authority's role (lead authority vs. participating authority)
• Taxpayer rights of presence and information under domestic law

2 corrections:
- DAC7 adoption date imprecise: adopted 22 March 2021 but published 25 March 2021
- Official URL returns HTTP 403
6 clarifications.
4 notes.