The most common coupons for Cato's fashion products offer a percentage off of a purchase, such as 35 percent off, 50 percent off, etc. These coupons are available at large websites, such as Retailmenot.com. As of June 2015, Cato does not offer any coupons or rewards program.
Retailmenot's coupons may expire, be limited to a particular location or only work once, so they may not always work. Furthermore, as of June 2015, two companies share the Cato Retailmenot web page - the fashion retailer and the Cato Institute dealing in academic literature. Be sure the coupon you are using is for the correct Cato. Cato's website does offer a "clearance" tab, providing discounts on certain merchandise.