Click a Coupon or click Start Shopping to earn 4% Cash Back at Knock Knock.
Complete your purchase. If you use a coupon, your discount will be applied during checkout.
Your cash back will be added to your Extrabux account in 1-7 days.
Knock Knock Cashback
They are independent makers of clever gifts, books, and whatever else they can think up. Their mission is to bring humor, creativity, and smarts to everyday life.
Get Cashback easily
- Join for FREE with an email and password
- Search for a store
- Click the "Start Shopping" button or choose a coupon
- Complete your purchase at the store's website
- Cash back will be added to your Extrabux account!