عنوان مقاله [English]
Depreciation of currency and its consequences is one of the issues affecting society. The jurists in today's era, in which credit money has no inherent value, hold different views about its calculation in khums. The question is: Considering the inflation and depreciation of money that leads to price growth and lack of purchasing power, how is khums calculated for the rise in the price of goods? This research, using the descriptive-analytical method and examining the works of Imami jurists, has collected the reasons for non-obligation of khums in case of market price growth due to inflation as follows: preventing the loss of khums payer, maintaining the value of money in dowry and the like, preserving the economic authority of believers, stopping the escape of khums, the truthfulness of paying the debt, purchasing power as the backing of banknotes, the non-objectivity of credit money, the necessity of justice rule, the emphasis of custom on the claim, narrative evidence and principle of istishab. Some people believe that narrative evidence cannot prove the claim. Still, some people, citing Sheikh Tusi's opinion, prove the necessity of compensating for the depreciation of money based on narrations. Moreover, the principle of istishab regarding both non-obligation and obligation is fixed in the discussion. Therefore, it is not substantial proof, but the principle of innocence can prove the claim.