It depends, your amount is a theoretical maximum. Sometimes you have exploration success and revalue mining assets upwards. No tax to pay. Sometimes a mine is closed due to low gold prices and you revalue to the downside. No tax saved here, would be different if you bought the mine. In Troy's case I read the remarks regarding deferred tax assets of past annual reports.
TRY Price at posting:
3.7¢ Sentiment: None Disclosure: Held