ILLINOIS U.I. ACT Section 401
A-25 (12/11)
"Determination period" means, with respect to each June 1 determination date, the 12 consecutive calendar
months ending on the immediately preceding December 31 and, with respect to each December 1 determination
date, the 12 consecutive calendar months ending on the immediately preceding June 30.
"Benefit period" means the 12 consecutive calendar month period beginning on the first day of the first calendar
month immediately following a determination date, except that, with respect to any calendar year in which there
is a June 1 determination date, "benefit period" shall mean the 6 consecutive calendar month period beginning
on the first day of the first calendar month immediately following the preceding December 1 determination date
and the 6 consecutive calendar month period beginning on the first day of the first calendar month immediately
following the June 1 determination date. Notwithstanding the foregoing sentence, the 6 calendar months
beginning January 1, 1982 and ending June 30, 1982 shall be deemed a benefit period with respect to which the
determination date shall be June 1, 1981.
"Gross wages" means all the wages paid to individuals during the determination period immediately preceding a
determination date for insured work, and reported to the Director by employers prior to the first day of the third
calendar month preceding that date.
"Covered employment" for any calendar month means the total number of individuals, as determined by the
Director, engaged in insured work at mid-month.
"Average monthly covered employment" means one-twelfth of the sum of the covered employment for the 12
months of a determination period.
"Statewide average annual wage" means the quotient, obtained by dividing gross wages by average monthly
covered employment for the same determination period, rounded (if not already a multiple of one cent) to the
nearest cent.
"Statewide average weekly wage" means the quotient, obtained by dividing the statewide average annual wage
by 52, rounded (if not already a multiple of one cent) to the nearest cent. Notwithstanding any provisions of this
Section to the contrary, the statewide average weekly wage for the benefit period beginning July 1, 1982 and
ending December 31, 1982 shall be the statewide average weekly wage in effect for the immediately preceding
benefit period plus one-half of the result obtained by subtracting the statewide average weekly wage for the
immediately preceding benefit period from the statewide average weekly wage for the benefit period beginning
July 1, 1982 and ending December 31, 1982 as such statewide average weekly wage would have been
determined but for the provisions of this paragraph. Notwithstanding any provisions of this Section to the
contrary, the statewide average weekly wage for the benefit period beginning April 24, 1983 and ending
January 31, 1984 shall be $321 and for the benefit period beginning February 1, 1984 and ending December 31,
1986 shall be $335, and for the benefit period beginning January 1, 1987, and ending December 31, 1987, shall
be $350, except that for an individual who has established a benefit year beginning before April 24, 1983, the
statewide average weekly wage used in determining benefits, for any week beginning on or after April 24, 1983,
claimed with respect to that benefit year, shall be $334.80, except that, for the purpose of determining the
minimum weekly benefit amount under subsection B(1) for the benefit period beginning January 1, 1987, and
ending December 31, 1987, the statewide average weekly wage shall be $335; for the benefit periods January 1,
1988 through December 31, 1988, January 1, 1989 through December 31, 1989, and January 1, 1990 through
December 31, 1990, the statewide average weekly wage shall be $359, $381, and $406, respectively.
Notwithstanding the preceding sentences of this paragraph, for the benefit period of calendar year 1991, the
statewide average weekly wage shall be $406 plus (or minus) an amount equal to the percentage change in the
statewide average weekly wage, as computed in accordance with the preceding sentences of this paragraph,
between the benefit periods of calendar years 1989 and 1990, multiplied by $406; and, for the benefit periods of
calendar years 1992 through 2003 and calendar year 2005 and each calendar year thereafter, the statewide
average weekly wage, shall be the statewide average weekly wage, as determined in accordance with this
sentence, for the immediately preceding benefit period plus (or minus) an amount equal to the percentage
change in the statewide average weekly wage, as computed in accordance with the preceding sentences of this
paragraph, between the 2 immediately preceding benefit periods, multiplied by the statewide average weekly
wage, as determined in accordance with this sentence, for the immediately preceding benefit period. However,
for purposes of the Workers' Compensation Act, the statewide average weekly wage will be computed using
June 1 and December 1 determination dates of each calendar year and such determination shall not be subject to
the limitation of $321, $335, $350, $359, $381, $406 or the statewide average weekly wage as computed in
accordance with the preceding sentence of this paragraph.
