Mo. Rev. Stat. § 377.250: Minimum premiums.

1. Every corporation, company or association doing business under the provisions of sections 377.200 to 377.460 shall charge a mortuary premium at least equal to that of yearly term insurance at age of entry according to the actuaries' or combined experience mortality table, with interest at four percent, and such mortuary premium shall be increased by a loading of not less than twenty percent for age twenty and all ages under twenty, and one percent additional for each additional year of age, renewable term policies excepted from such loading.

2. Said premium may be paid annually, semiannually, quarterly, bimonthly or monthly in advance.