An industrial loan institution operating under this chapter may, under proper authority from the board of directors of the industrial loan institution, declare a dividend of so much of the net profits of the industrial loan institution, after providing for all expenses, losses, reserves, interest, and taxes accrued or due by the industrial loan institution, as they shall judge expedient. However, before any dividend is declared, not less than one-tenth (1/10) of the net profits of the industrial loan institution for the preceding one-half (½) year or for the period covered by the dividend shall be carried to a surplus fund, until the surplus fund shall amount to fifty percent (50%) of the par value of the common stock of the industrial loan institution.