# 403.254 Calculation of premiums.
(a) *General provisions.* To calculate the amount of “premiums”, calculate the present value on the initial calculation date of expected earned premiums for the loss ratio calculation period.
(b) *Specific provisions.* (1) *Earned premium* for a given period means—
(i) Written premiums for the period; plus—
(ii) The total premium reserve at the beginning of the period; less—
(iii) The total premium reserve at the end of the period.
(2) *Written premiums in a period* means—
(i) Premiums collected in that period; plus—
(ii) Premiums due and uncollected at the end of that period; less—
(iii) Premiums due and uncollected at the beginning of that period.
(3) *Total premium reserve* means the sum of—
(i) The unearned premium reserve;
(ii) The advance premium reserve; and
(iii) The reserve for rate credits.
(4) *Unearned premium reserve* means the portion of gross premiums due that provide for days of insurance coverage after the valuation date.
(5) *Advance premium reserve* means premiums received by the insuring organization that are due after the valuation date.
(6) *Reserve for rate credits* means rate credits on a group policy that—
(i) Accrue by the valuation date of the policy; and
(ii) Are paid or credited after the valuation date.