In addition to fixed capital, each enterprise is allocated a minimum of working capital from the state through the Central Bank and is required to meet operating expenses with the proceeds from sales of its output. Up to 50% of the "profit" is taxed, the remaining half being kept by the enterprise for purchase of equipment, introduction of new technology, welfare benefits, and bonuses. As such, the system provides some built-in incentives and a degree of micro-level autonomy, unlike the budget allocation system, under which any surplus is turned over to the government in its entirety.