Monthly limitation
The monthly limitation for any month is 1 ⁄ 12 of—
(A) in the case of an eligible individual who has self-only coverage under a high deductible health plan as of the first day of such month, $2,250.
(B) in the case of an eligible individual who has family coverage under a high deductible health plan as of the first day of such month, $4,500.