§ 3101. Rate of tax
(a)
Old-age, survivors, and disability insurance
In addition to other taxes, there is hereby imposed on the income of every individual a tax equal to the following percentages of the wages (as defined in section
3121
(a)) received by him with respect to employment (as defined in section
3121
(b))—
| In cases of wages received during: | The rate shall be: |
|---|---|
| 1984, 1985, 1986, or 1987 | 5.7 percent |
| 1988 or 1989 | 6.06 percent |
| 1990 or thereafter | 6.2 percent. |
(b)
Hospital insurance
In addition to the tax imposed by the preceding subsection, there is hereby imposed on the income of every individual a tax equal to the following percentages of the wages (as defined in section
3121
(a)) received by him with respect to employment (as defined in section
3121
(b))—
(1)
with respect to wages received during the calendar years 1974 through 1977, the rate shall be 0.90 percent;
(3)
with respect to wages received during the calendar years 1979 and 1980, the rate shall be 1.05 percent;
(4)
with respect to wages received during the calendar years 1981 through 1984, the rate shall be 1.30 percent;
(c)
Relief from taxes in cases covered by certain international agreements
During any period in which there is in effect an agreement entered into pursuant to section 233 of the Social Security Act with any foreign country, wages received by or paid to an individual shall be exempt from the taxes imposed by this section to the extent that such wages are subject under such agreement exclusively to the laws applicable to the social security system of such foreign country.