Iowa Code § 518.25: Surplus.

An association organized under this chapter before July 1, 2009, shall at all times maintain a surplus of not less than fifty thousand dollars or one-tenth of one percent of the gross risk in force, whichever is greater. An association organized under this chapter on or after July 1, 2009, shall at all times maintain a surplus of not less than one hundred thousand dollars or one-tenth of one percent of the gross risk in force, whichever is greater.