. A more meaningful comparison might be disposable personal income,
For what it is worth, this link [ http://www.cbo.gov/showdoc.cfm?index=3089&sequence=11 ] goes to the latest analysis done by CBO of federal total effective tax rates by income class, and the effective rates for the individual income tax itself.
Total income defined as all family cash (aftertax) income + proportion of total federal taxes extracted from that income class through immediate taxation and indirect routes such as consumption expenditure or lower wage etc. Income include entitlement payment, benefits etc.
A household consists of the people who share a housing unit, regardless of the relationships among them. Comprehensive household income equals pretax cash income plus income from other sources. Pretax cash income is the sum of wages, salaries, self-employment income, rents, taxable and nontaxable interest, dividends, realized capital gains, cash transfer payments, and retirement benefits plus taxes paid by businesses (corporate income taxes and the employer's share of Social Security, Medicare, and federal unemployment insurance payroll taxes) and employee contributions to 401(k) retirement plans. Other sources of income include all in-kind benefits (Medicare, Medicaid, employer-paid health insurance premiums, food stamps, school lunches and breakfasts, housing assistance, and energy assistance). Households with negative income are excluded from the lowest income category but are included in totals. Individual income taxes are distributed directly to households paying those taxes. Payroll taxes are distributed to households paying those taxes directly or paying them indirectly through their employers. Federal excise taxes are distributed to households according to their consumption of the taxed good or service. Corporate income taxes are distributed to households according to their share of capital income. a. Income categories are defined by ranking all people by their comprehensive household income adjusted for household size--that is, divided by the square root of the household's size. Quintiles, or fifths, of the income distribution contain equal numbers of people.
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