Murowa Diamonds v Commissioner General of the Zimbabwe Revenue Authority

Murowa Diamonds, a diamond mining company, was audited by ZIMRA officials in June/July 2009. The audit allegedly revealed an overpayment of $215,878.54 in withholding tax between January 2007 and October 2008. The applicant claimed it had paid this amount to the Reserve Bank of Zimbabwe in foreign currency, which the Reserve Bank converted to Zimbabwe dollars and credited to ZIMRA's account. The applicant sought to set off this alleged overpayment against withholding taxes due for 2009-2010. ZIMRA disputed the overpayment, stating it only received Zimbabwe dollars and that payments to the Reserve Bank (which was not appointed as ZIMRA's agent) did not constitute payment to ZIMRA. The obligation to pay withholding tax in foreign currency only arose in 2009 under section 4A(1)(f) of the Finance Act 2009. ZIMRA demanded payment by 5 October 2010, threatening recovery measures. The applicant filed an urgent application on 19 October 2010 seeking to prohibit ZIMRA from appointing agents under section 48 to collect the tax until the dispute was resolved.

• Whether the matter was urgent and required urgent interim relief
• Whether the applicant had established a prima facie right to an interim interdict
• Whether set-off could be claimed between debts owed to different state entities (ZIMRA and Reserve Bank)
• Whether set-off could be raised against taxes due to the fiscus
• Whether the applicant would suffer irreparable harm if the interdict was not granted
• Whether the balance of convenience favored the applicant

The application was dismissed with costs.

At common law, set-off (compensatio) requires mutual debts between the same parties that are liquidated and due. However, there are two important public policy exceptions: (1) a debt owed by one department/entity of the State cannot be set-off against a debt owed to another department/entity; and (2) set-off cannot be raised against taxes due to the fiscus. These exceptions exist to avoid confusion in state accounts and to ensure uninterrupted flow of tax revenues to the Treasury in the interests of good governance. Where an applicant seeks an interim interdict to prevent a tax authority from exercising statutory collection powers, the applicant must establish: (a) a prima facie right; (b) irreparable harm that cannot be compensated otherwise; and (c) that the balance of convenience favors granting the interdict. Payment to an entity that is not appointed as an agent of the tax authority does not constitute payment of tax to the authority, even if both entities fall under the state umbrella.

The court observed that the applicant should have instituted declaratory proceedings to resolve the dispute over the alleged overpayment rather than waiting until the respondent threatened collection measures and then seeking urgent interim relief. The court also noted that the applicant failed to explain the circumstances under which the foreign currency payment was made to the Reserve Bank in 2007, and therefore could not establish that the State benefited from such payment. The court commented that it would be contradictory for an applicant claiming to have considerable assets to simultaneously claim irreparable harm from payment of the disputed sum, particularly without providing financial evidence of such harm.

This case clarifies important principles regarding set-off in the context of taxation and state entities in Zimbabwean law (which shares common law principles with South African law). It reinforces the public policy exceptions to the common law right of set-off: (1) debts between different government departments/state entities cannot be set off against each other to avoid confusion in state accounts; and (2) set-off cannot be raised against taxes due to the fiscus to ensure uninterrupted flow of tax revenues for good governance. The case also illustrates the requirements for urgent interim interdicts, particularly the need to establish a prima facie right, irreparable harm, and balance of convenience. It emphasizes that parties cannot use interim relief to circumvent their obligation to pay admitted taxes while disputing the existence of set-off rights, and that such disputes should be resolved through declaratory relief proceedings.