With the slow growth of the trust industry，the ratio of cost-to-income for the fiduciary business has been increasing each year. However，that ratio for overall industry has been remaining about 20% with the smooth of the inherent business growth. There are significant differences between different types of trust companies in cost-to-income ratio. This ratio is gradually declining with the scales of the collective trust investments and net assets increasing；the developed areas have lower ratio than that of the mid-western region in China；and the companies have shareholders from private enterprises have higher cost-to-income ratio than that of others.