The United States is often said to maintain a classical tax system, under which corporate profits are subject to double taxation, once at the corporate level when they are earned, and again at the individual level when they are paid out as dividends. The Bush administration is reportedly considering corporate tax reform options in part because of concerns about double taxation. Dividends are not taxed twice if they are paid to nonprofit institutions or foundations; federal, state or local governments; public or private pension funds; and 401(k) plans or Individual Retirement Accounts.