Maryland Code, Insurance § 2-502

(1) for each health insurer, the assessment fee is the product of the fraction obtained by dividing the gross direct premium written by the health insurer in the prior calendar year by the total amount of gross direct premium written by all health insurers in the prior calendar year, multiplied by the health insurer assessment portion;

(2) for each life insurer, the assessment fee is the product of the fraction obtained by dividing the gross direct premium written by the life insurer in the prior calendar year by the total amount of gross direct premium written by all life insurers in the prior calendar year, multiplied by the life insurer assessment portion;

(3) for each property and casualty insurer, the assessment fee is the product of the fraction obtained by dividing the gross direct premium written by the property and casualty insurer in the prior calendar year by the total amount of gross direct premiums written by all property and casualty insurers in the prior calendar year, multiplied by the property and casualty insurer assessment portion; and

(4) for each domestic reinsurer subject to § 4-115(b)(2)(ii) and (c)(3) of this article, the assessment fee is the average of the assessment fee paid by the 100 property and casualty insurers with the highest gross direct written premium in the prior calendar year.