Buy Now, Pay Later Apps: Best Options for Interest Free Shopping

Buy pay later apps let shoppers split a purchase into smaller payments, often four installments over six weeks, and sometimes into longer monthly loans, without the interest charges typical of credit cards. Affirm, Klarna, PayPal Pay in 4, Cash App Afterpay and Sezzle dominate the field, each with different fees, limits and credit reporting habits.

At a Glance

• Affirm charges no fees at all, including no late fee, and allows purchases up to $30,000
• Klarna is the only major app with no fixed spending limit, but it requires autopay and charges a late fee
• PayPal Pay in 4 works anywhere PayPal is accepted, covering more than 30 million merchants
• Cash App Afterpay scored highest for reputation and trust among the five apps compared here
• Sezzle offers the most flexible rescheduling options but carries the most fees overall

How the Major Buy Pay Later Apps Stack Up

Each app builds its business around a version of the same idea: split a purchase into four payments, or stretch it into a monthly installment loan for bigger ticket items. But the terms vary enough that picking the wrong one can cost real money in fees or interest.

Affirm offers Pay in 4, with payments due every two weeks, plus installment loans running three to 48 months at rates between 0% and 36%. It is accepted at more than 337,000 merchants and can be used through its app, a debit card, a virtual card, or digital wallets like Apple Pay. Founded in 2012 and based in San Francisco, Affirm has processed 45 million transactions to date.

Klarna runs four plans: Pay in 4, Pay in Full, Pay in 30, and a monthly installment option with terms from three to 24 months and rates from 0.00% to 35.99%. Klarna does not cap purchase size, the only service among this group without a fixed limit. It is accepted by more than 1 million merchants, and shoppers can also draw on