Argentina vs Bayer Argentina S.A., March 2024, Supreme Court, Case No CAF 34007/2019/1/RH1

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The tax authorities had applied the TNMM and used the interquartile range and median to determine the arm’s length income of Bayer Argentina S.A. for FY 1999 and this resulted in a tax assessment being issued where the taxable income had been adjusted upwards.

Not satisfied with the assessment Bayer Argentina S.A. filed a complaint.

Both the Tax Court and later the National Court set aside the assessment and decided in favour of Bayer Argentina S.A.

An appeal was then brought by the tax authorities before the Supreme Court.

Judgment of the Supreme Court

The Supreme Court upheld the decision of the National Court and decided in favour of Bayer Argentina S.A.

According to the Court, the application of the interquartile range used by the tax authorities to support the assessment of additional taxable income for FY 1999 was inadmissible, since the median and interquartile range was not applicable in the period and a contrary conclusion would seriously undermine legal certainty and would imply disregarding the need for the State to clearly prescribe the taxes and exemptions, so that taxpayers can easily adjust their respective conduct in tax matters.

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