Pay in 3 is a concise way of saying that a consumer can split their payment into three simultaneous payments when shopping with an online retailer. This is a payment method within Buy Now Pay Later giving shoppers more time to pay. It attaches no fees (when payments are made in due time) or interest and it doesn’t impact the buyer’s credit score. The purchase amount will be withdrawn from the credit- or debit card the customer have registered with the retailer or payment provider.