Germany: Treaty override declared constitutional

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement


Germany: Treaty override declared constitutional

Linn
Braun

Alexander Linn

Thorsten Braun

In a decision dated December 15 2015 (and published on February 12 2016), Germany's constitutional court (BVerfG) confirmed that the legislature can enact tax treaty override provisions that aim to secure Germany's taxation rights, despite treaty provisions to the contrary.

Tax treaties in Germany are not 'self-executing'. For a tax treaty to become applicable, it must be transposed into German domestic law, which requires the consent of both the upper and lower houses of parliament. Once transposed, a treaty will have equal status with 'ordinary' domestic tax law; in other words, the treaty will not supersede ordinary domestic law, or vice versa. Despite this equality of status, there was some discussion in German literature if the constitution, interpreted in consideration of international law, could prevent the legislator from overriding a tax treaty, at least in specific circumstances. The federal tax court (BFH) referred a case to the constitutional court in 2014, where a domestic rule denied a taxpayer the exemption from German tax foreseen under the applicable tax treaty if the taxpayer failed to provide proof that the other state either did actually tax the relevant (employment) income or voluntarily waived its right to tax such income.

In its decision, the constitutional court makes a detailed analysis of the relationship between tax treaties and ordinary domestic law and concludes that tax treaties do not rank superior to ordinary domestic law. For ordinary domestic law, however, the lex posterior derogat legi priori principle (a later law prevails over an earlier law) applies, which means that the legislator can unilaterally introduce rules that deviate from earlier provisions in a tax treaty. Several other cases with other treaty overriding provisions are pending and the BVerfG is expected to come to similar conclusions, highlighting the need to consider domestic tax law of Germany as a treaty partner.

Alexander Linn (allinn@deloitte.de) and Thorsten Braun (tbraun@deloitte.de)

Deloitte

Tel: +49 89 29036 8558 and +49 69 75695 6444

Website: www.deloitte.de

more across site & shared bottom lb ros

More from across our site

It was also a memorable night for Galicia, KPMG, Skadden and Pinheiro Neto, all of which scooped major awards at a gala ceremony in New York
The former Deloitte UK CEO earned a 45% raise in a year when 1,000 staff reportedly lost their jobs – and the pay gap is only getting bigger
In a seminal development for big law, the 95-year-old firm is set to cease operations after a series of high-profile partner departures
UK Chancellor John Healey extended a VAT cut, suspended tariffs, increased a bank surcharge and vowed to increase funding for HMRC
Kristine Riisberg warned that TP decisions can determine top-up tax exposure under pillar two, while global consensus over the rules remains unsettled
Both Germany’s NIS2 and the EU AI Act now determine whether a tax function can meet its obligations – and both can make management personally accountable
Originators, loan purchasers and securitisation vehicles may need to revisit servicing agreements and pricing after a key judgment narrowed the VAT credit management exemption
Opening doors for existing talent within Baker McKenzie and a desire for enhanced legal capabilities informed Ricardo Perera’s switch from KPMG
Boaz Goren’s move to the upstart PE-backed firm takes the number of senior UK tax professionals who have left EY this year to 13
The allegations against Deloitte Cyprus raise uncomfortable questions about how far the big four can distance themselves from misconduct at member firms
Gift this article