Grab a $40 off $40 Target Coupon w/ REDcard Sign Up! This post may contain affiliate links or sponsored content. See Disclosure Policy. Deals By Store Now is the time to sign up for a Target REDcard! When you sign up you will snag a $40/$40 Coupon at Target! You have to sign up by December 12th but you will have until January 18, 2020 to use the coupon! Read more about all the great benefits of the REDcard!