Upper and lower limits
For purposes of subsection (a)—
(1) Lower limit
(1)Lower limit#
The lower limit for any taxable year is the sum of the amounts required under section 213(d) of the Social Security Act for a quarter of coverage in effect with respect to each calendar quarter ending with or within such taxable year.
(2)Upper limit#
The upper limit for any taxable year is the amount equal to 150 percent of the lower limit for such taxable year.