Cellular network operator MTN Group expects at least a 30% increase in headline earnings per share for the year to 31 March.
The group says in a trading statement that the results will include an adjusted headline earnings per share figure, also at least 30% up on the previous year.
This relates to the Nigerian subsidiary being granted a five-year tax holiday under "pioneer status" legislation.
Consensus forecasts indicate that sector analysts have been expecting earnings to increase to 255.6c a share, 79% up on last year`s 142.8c.
In terms of the pioneer status legislation, capital allowances in this period may be carried forward and claimed as deductions against taxable income from the sixth year of operations onwards.
A deferred tax credit relating to these deductible temporary differences has been recognised in the previous results in terms of the requirements of the South African Statements of Generally Accepted Accounting Practice.
The company says although it has complied with this, the board has reservations about the appropriateness of this treatment.
"As a result, the board has decided to report adjusted headline earnings per share, adjusted in order to negate the effects of the deferred tax asset credit in addition to headline earnings per share."
The results are expected to be published on or near 10 June.

