Amazon offers small business owners the option to purchase now and pay later through Affirm.

According to exclusive information obtained by CNBC, Amazon is launching its first buy now, pay later checkout option for the millions of small business owners who use its online store.The tech giant confirmed Thursday that its partnership with Affirm is expanding to include Amazon Business, the e-commerce platform for companies.The action strengthens a vital relationship for Affirm, which has had to look for ways to increase revenue since the market for pricey Peloton bikes crashed.