the District of Columbia, and numerous cities. These taxes are imposed on employers and employees and on various compensation bases. They are collected and paid to the taxing jurisdiction by the employers. Most jurisdictions imposing payroll taxes require reporting quarterly and annually in most cases, and electronic reporting is generally required for all but small employers. Because payroll taxes are imposed only on wages and not on income from investments, taxes on labor income are much heavier than taxes on income from capital. Income tax withholding Federal, state, and local withholding taxes are required in those jurisdictions imposing an income tax. Employers having contact with the jurisdiction must withhold the tax from wages paid to their employees in those jurisdictions. Computation of the amount of tax to withhold is performed by the employer based on representations by the employee regarding his/her tax status on IRS Form W-4. Amounts of income tax so withheld must be paid to the taxing jurisdiction, and are available as refundable tax credits to the employees. Income taxes withheld from payroll are not final taxes, merely prepayments. Employees must still file income tax returns and self assess tax, claiming amounts withheld as payments. Social Security and Medicare taxes Federal social insurance taxes are imposed equally on employers and employees, consisting of a tax of 6.2% of wages up to an annual wage maximum ($132,900 in 2019) for Social Security plus a tax of 1.45% of total wages for Medicare. For 2011, the employee's contribution was reduced to 4.2%, while the employer's portion remained at 6.2%. There is an additional Medicare tax of 0.9% on wages over $200,000, to be paid only by the employee (reported separately on the employee's tax return on Form 8959). To the extent an employee's portion of the 6.2% tax exceeds the maximum by reason of multiple employers (each of whom will collect up to the annual wage maximum), the employee is entitled to a refundable tax credit upon filing an income tax return for the year. Unemployment taxes Employers are subject to unemployment taxes by the federal and all state governments. The tax is a percentage of taxable wages with a cap. The tax rate and cap vary by jurisdiction and by employer's industry and experience rating. For 2009, the typical maximum tax per employee was under $1,000. Some states also impose unemployment, disability insurance, or similar taxes on employees. Reporting