Shop Pay does charge interest on some installment plans but not others. The short biweekly plans, where you split a purchase into two or four equal payments, are always 0% APR. The longer monthly plans, which stretch repayment over several months, can carry an APR anywhere from 0% to 36% depending on your credit and the specific transaction.1Affirm. About Shop Pay Installments The financing itself is handled by Affirm, which sets the rate and discloses it before you commit.
Which Plans Are Interest-Free and Which Aren’t
Shop Pay Installments come in two flavors. Biweekly plans let you split the purchase into two or four equal payments with no interest and no added charges. Pick the four-payment option and you finish paying in about six weeks.
Monthly plans work differently. They can stretch up to twelve months depending on the store and the order size, and they may carry interest. Some monthly plans also require a down payment at checkout.2Shop Help Center. Shop Pay Installments Overview Not every store enables every plan type, so the choices you see at one checkout may not match what appears at the next.
Orders in the United States must fall between $50 and $30,000 (including discounts, shipping, and taxes) to be eligible for installments at all.1Affirm. About Shop Pay Installments Gift cards and subscription products cannot be paid for with installments regardless of price.3Shopify Help Center. Shop Pay Installments FAQ
What the Monthly Interest Rate Looks Like
Affirm sets rates on monthly plans between 0% and 36% APR based on your creditworthiness and the transaction.1Affirm. About Shop Pay Installments Affirm’s own example: an $800 purchase could split into twelve monthly payments of $72.21 at 15% APR, or four biweekly payments of $200 at 0%.
The average credit card APR in the United States sits somewhere around 22% to 25% depending on the source. If Affirm offers you a monthly plan near the bottom of its range, you’ll pay less in financing than you would carrying a credit card balance. If you’re offered a rate near 36%, you’ll pay more. It’s worth checking the number Affirm shows you against whatever card you’d otherwise use before accepting the plan.
How the Interest Is Calculated
Affirm uses simple interest, not compound interest. The charge is calculated on your original purchase amount and doesn’t grow the way a revolving credit card balance can.4Affirm. Why Affirm: Buy Now Pay Later vs Credit Cards The full cost of the loan, principal plus all interest, is disclosed before you finalize the order and stays fixed through the repayment period.
There are no other charges layered on top. Affirm doesn’t charge late fees, prepayment fees, annual fees, or account opening or closing fees.5Affirm Help Center. How Affirm Works The disclosed interest on monthly plans is the only financing cost.
Paying Early to Reduce What You Owe
You can pay off a monthly plan ahead of schedule without penalty. Any extra amount you pay goes straight to the remaining balance, which means fewer total payments, a smaller final payment, or both, and you avoid any interest that hasn’t yet accrued.6Affirm Help Center. Paying Back Your Plan Because the interest is simple, the savings from paying early are straightforward.
Missed Payments and Interest on Returns
Affirm does not charge late fees.5Affirm Help Center. How Affirm Works But missing payments on an interest-bearing monthly plan still costs you, because interest continues to apply to your outstanding balance. A pattern of missed payments can also affect whether Shop Pay Installments approves you for future purchases. Accounts that stay delinquent long enough can be sent to a third-party collection agency, generally within roughly 60 to 180 days.
Refunds work in a similar direction. If you return an item bought on a monthly plan, the merchant processes the refund, but any interest you have already paid is not returned. Affirm treats interest as the cost of borrowing, and that cost is considered incurred whether or not you keep the product.3Shopify Help Center. Shop Pay Installments FAQ For a large purchase you might return, the interest-free biweekly option (when available) removes this risk.
What You Must Be Shown Before You Agree
Before you commit to any Shop Pay installment plan, Affirm has to show you the total financing cost in clear terms. The Truth in Lending Act requires the annual percentage rate and total finance charge to be disclosed prominently before a loan is finalized.7Office of the Law Revision Counsel. 15 USC 1632 – Form of Disclosure; Additional Information You’ll see the APR and the exact dollar amount of interest you’d pay in total before you click confirm. If the numbers don’t work for you, decline and pay another way. There’s no cost to walk away at that stage, and the eligibility check Affirm runs at checkout does not affect your credit score.8Affirm. How to Use Affirm for Flexible Buy Now Pay Later Payments