This thesis presents a study on monetary punishment, which includes two types of financial penalties: Fines and confiscation. It studies each of these two penalties separately from the jurisprudence standpoint of different Islamic sects. It then compares them with the Omani Penal Law 7/2018, and then goes on to expose the economic effects of each of them. The researcher arrived at the conclusion that the predominant opinion makes monetary punishments like fines and confiscation permissible if it observes five conditions: To verify the affective cause which are crimes that compel punishment -which excludes issues of prescribed penalties and retribution-, to not substitute the punishment of lash whippings, to be considerate of people's financial situation whether rich or poor and allowing poor people a way out to pay their dues or to resort to substitute punishments, to be a punishment that fits the crime, its type and the state of the perpetrator, and to observe disciplinary purposes and not to be made a source for profit. The Omani Penal Law approves the two penalties, which are monetary fines and confiscation. It makes monetary fines a basic punishment that can be complementary and ancillary. It also qualifies these punishments as debts which the convict owes to the government. ز In addition it makes confiscation a complementary and ancillary punishment, and qualifies it as the state's possession of existing objects and funds. Both financial fines and confiscation have an inverse relationship to the economy. When their application succeeds the economic returns decrease. These penalties cannot be considered a positive income to the state's resources due to their infrequency, their low returns and their negative economic impacts on individuals and society as a whole.