What are Affirm’s rates and fees? Rui Kojima December 11, 2018 15:59 Updated Affirm offers a 3 month payment plan with 0% APR for Aetrex.com customers. Related articles How do I make payments with Affirm? What are the shipping methods and rates you offer? How can I make a change to my order after it has been placed? Comments 0 comments Please sign in to leave a comment.