A donation is only applicable where someone gratuitously offered property to someone else for inadequate consideration or waived a right to property or income to them. Thus one has to look in the case of an interest free loan whether the person had a right to interest which he now waived. For this one has to look at the loan agreement. If it states interest at X amount, then waiving of this interest constitutes a donation. If the contract stipulates zero interest, then there is no donation. One can argue that someone offering money now only to receive the exact amount sometime in future, is waiving inherent value in terms of the time value of money at market rates. By having a fixed term the exact loss/waiver can be calculated, but if the loan is made payable on demand, the waived interest is impossible to be computed or at least difficult to prove. Therefore one should make the loan to be payable on demand. Currently SARS does notview such loans as donations. The reason for the loan is also important.