A South African tax payer starts to receive Foreign Dividends from a foreign private investment fund for the first time, on a quarterly basis, potentially ranging from 0% to 20% per quarter. There is also a chance that some quarters could have negative growth of the principal invested, where there will be no dividend.

How should the tax payer estimate the annual Foreign Dividends received, for Provisional Tax purposes, given that the investment is of high-risk with very volatile returns and no previous history from which to draw dividend estimates?

For the first tax year of receiving dividends (for the first time), could the tax payer omit doing Provisional Tax in favour of declaring Foreign Dividends on the annual Tax Return, given the difficulty of estimating the dividends when there's no track record?