The fiscal system of India is based on the constitution and envisages two levels of government - central and state. The constitution distributes legislative powers and taxes across Union, State and Concurrent lists. The central government's tax revenues come from taxes like income tax, customs duties, and excise duties which are either retained by the center or shared with states. Expenditure consists of revenue expenditure on general, social and economic services and capital expenditure. The fiscal deficit is the excess of total expenditure over total receipts and represents the government's total borrowing requirement.