Money (måla) is objects made out of metal, paper or plastic representing value and which can be exchanged for goods and services. A barter economy operated during the Buddha's time and money was just starting to come into use. The most common coins were kahàpaõa, nikkha, aóóhapàda and màsaka (A.I,250; M.II,163; S.I,82). These names refer to the weight of the coin, the value of which depended on whether they were made out of gold, silver, copper or an alloy. Màsaka were made out of copper and it took 15 to represent any significant value. Tokens made out of shells, seeds, wood and lac were also used as a medium of exchange (Vin.IV,238). Most early Indian coins were square because it was easier to cut them out of sheets of metal rather than stamp them using a round die.
The Buddha forbade monks and nuns from even touching gold and silver and they were not allowed to engage in barter either (A.II,53), although very few Buddhist monks or nuns continue to follow this rule today. Lay people practising the ten Precepts on certain days will also not use money either. However, the Buddha was aware that money can help satisfy legitimate desires, give a sense of security and even win the respect of others, and therefore, it can be a means of happiness. Thus, he considered the pursuit of wealth to be a worthwhile and legitimate goal for lay people, the proviso being, of course, that it is `earned by hard work, by strength of arm and sweat of brow, honestly and lawfully'(A.II,67). He recommended that prudent people should balance their expenditure with their income (A.IV,281-4) and divide their money into four and use it for (1) basic needs, (2) miscellaneous expenses, (3) charity and (4) be put aside for future eventualities (A.III,45). See Interest.