What are Affirm’s rates and fees? Megan Tencza December 11, 2018 15:59 Updated Follow Affirm offers a 3 month payment plan with 0% APR for Aetrex.com customers. Related articles How do returns work when I use Affirm to make a purchase? Why do I see a $1.00 charge when I pay with PayPal? How do I make payments with Affirm? What payment methods do you accept? Does Affirm do a credit check and will it affect my credit score? Comments 0 comments Please sign in to leave a comment.