Zimbabwe Platinum Mines (Private) Limited v Zimbabwe Revenue Authority

Zimbabwe Platinum Mines (the appellant) operated under a special mining lease (SML) and elected to maintain its books of account in US dollars as permitted under paragraph 11(1) of the 22nd Schedule of the Income Tax Act. Despite this election, the Zimbabwe Revenue Authority (ZRA/respondent) issued income tax assessments for the years 2003-2006 denominated in Zimbabwean dollars, contrary to the peremptory provisions of paragraph 11(2)(b) which mandated USD assessments. The appellant objected to these assessments. In 2012, ZRA commenced investigations and found the appellant had incorrectly claimed capital redemption allowances under the 5th Schedule instead of the 22nd Schedule. Following meetings, the parties agreed in September 2012 that assessments for 2003-2006 had prescribed and the appellant's liability was restricted to 2007-2012. However, ZRA later invoked section 47 of the Act, claiming misrepresentation and wilful non-disclosure, and issued amended assessments for 2003-2006 on 9 October 2014. These were subsequently cancelled and re-issued multiple times. ZRA also imposed a 30% penalty on additional profits tax (APT). The appellant objected on grounds of prescription, the applicability of APT adjustments under section 47, and the imposition of penalties on APT. The Special Court of Income Tax Appeals dismissed the appellant's appeal, finding the original Zimbabwean dollar assessments were nullities and prescription did not apply.

• Whether tax assessments issued in Zimbabwean dollars contrary to paragraph 11 of the 22nd Schedule of the Income Tax Act were invalid and a legal nullity
• Whether section 62(6) of the Income Tax Act applies to objections against invalid (as opposed to incorrect) assessments
• Whether the Commissioner could adjust additional profits tax assessments pursuant to section 47 of the Income Tax Act
• Whether penalties could be imposed on additional profits tax
• Whether the court erred in restricting its enquiry to whether the respondent misdirected itself when imposing a penalty
• Whether the 30% penalty on additional profits tax was appropriate given mitigating factors

The appeal was dismissed with costs.

An assessment issued contrary to peremptory statutory provisions is null and void ab initio, not merely incorrect. Where paragraph 11 of the 22nd Schedule of the Income Tax Act mandates that assessments for holders of special mining leases who elect to maintain books in US dollars must be determined and issued in US dollars, assessments issued in any other currency are legal nullities. Section 62(6) of the Income Tax Act, which makes certain assessments final and conclusive, only applies to valid assessments and has no application to nullities. The Commissioner's power under section 47 to adjust assessments after the six-year prescription period where there is fraud, misrepresentation or wilful non-disclosure applies to additional profits tax as well as income tax, since APT is "tax" within the meaning of the Act. Agreements between taxpayers and revenue authorities that are contrary to statute are unenforceable under the principle of ex turpi causa non oritur actio. Revenue authorities as creatures of statute cannot act outside their enabling legislation or waive statutory obligations.

The Court observed that in taxation matters, justice and equity have little significance - where the language of the statute is plain, the court must give effect to it even if the result is harsh and unfair to the taxpayer (citing Commissioner of Taxes v CW (Pvt) Ltd). The Court noted that every ordinarily sophisticated taxpayer knows that revenue authorities are tax-collecting agencies, not tax-imposing authorities, and the legitimate expectation is to be taxed according to statute, not concession or wrong views of law (citing Commissioner of Taxes v Astra Holdings). The Court commented on the adversarial system and the responsibility of parties to present evidence in support of their cases, noting that the appellant failed to present evidence justifying a reduction in the penalty from 30% to 5%. The Court emphasized that it looks at the substance of assessments, not their form, and that whether an assessment is labeled "original" or "amended" is irrelevant when determining validity.

This case establishes important principles in Zimbabwean tax law regarding: (1) the distinction between invalid assessments (nullities) and incorrect assessments (which can be corrected); (2) the peremptory nature of currency election provisions in special mining lease taxation; (3) the Commissioner's powers to re-open prescribed assessments where there is fraud, misrepresentation or wilful non-disclosure; (4) the scope of section 47 of the Income Tax Act and its application to additional profits tax; (5) the principle that revenue authorities cannot enter into agreements contrary to statute and such agreements are unenforceable; and (6) that administrative concessions or errors by tax officials cannot override statutory obligations. The case reinforces the principle that taxpayers will be taxed according to statute, not according to concessions or incorrect views of the law, and that revenue authorities cannot waive statutory obligations even by agreement.