Shop Pay does charge interest on some installment plans but not others. If you split a purchase into two or four biweekly payments, the APR is 0%. If you choose a monthly plan that stretches repayment over a longer period, the rate can run anywhere from 0% to 36% APR, set by Affirm based on your creditworthiness and the specific purchase. Whether you pay interest on Shop Pay installments comes down to which plan you pick at checkout and what Affirm offers you for that order.
Biweekly Plans Are Interest-Free, Monthly Plans May Not Be
Shop Pay Installments, financed by Affirm, comes in two shapes. The short-term option splits your purchase into two or four equal biweekly payments with no interest and no added charges. Pick the four-payment version and you finish paying about six weeks after the purchase date.1Shop Help Center. Shop Pay Installments Overview
The monthly option is the one that can carry interest. Monthly plans can extend up to twelve months depending on the store’s setup and the order size, and some orders may also require a down payment at checkout.1Shop Help Center. Shop Pay Installments Overview Which plans you see depends on the merchant — stores choose which options to enable — and on Affirm’s eligibility check at checkout, which does not affect your credit score.2Affirm. How to Use Affirm for Flexible Buy Now Pay Later Payments Higher-value orders are more likely to be routed toward monthly plans that carry interest; smaller orders tend to get the interest-free biweekly option.
What the 0%–36% APR Range Looks Like in Practice
Monthly rates on Shop Pay Installments run from 0% up to 36% APR.3Affirm. About Shop Pay Installments The service’s own disclosures give a concrete example: an $800 purchase could be split into twelve monthly payments of $72.21 at 15% APR, or into four interest-free biweekly payments of $200.
The average U.S. credit card APR sits around 22% to 25% depending on the data source and credit tier. If you qualify for a monthly plan at the lower end of Shop Pay’s range, you may pay far less in financing than you would carrying a credit card balance. Land near the top of the range, though, and the monthly plan costs more than a typical credit card would. Look at the exact APR you’re offered before accepting.
Eligible order size for installments in the United States is $50 to $30,000, including discounts, shipping, and taxes.3Affirm. About Shop Pay Installments
How the Interest Is Calculated
Affirm uses simple interest on Shop Pay monthly plans, not compound interest. The charge is calculated on your original purchase amount and does not grow the way a revolving credit card balance can.4Affirm. Why Affirm: Buy Now Pay Later vs Credit Cards The total cost of the loan — principal plus all interest — is disclosed upfront, and that number stays fixed for the life of the plan.
There are no other financing costs layered on top. Affirm does not charge late fees, prepayment fees, annual fees, or account opening or closing fees on these plans.5Affirm Help Center. How Affirm Works Interest on the monthly plan is the only cost of borrowing.
Paying Early to Cut Interest
You can pay off a monthly plan ahead of schedule at no penalty. Anything you pay above the scheduled amount goes straight to your remaining balance, which can mean 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, early payments translate cleanly into a lower total cost.
Refunds Don’t Give Back Interest You’ve Already Paid
If you return an item bought on a monthly plan, the merchant processes the refund, but any interest you’ve already paid stays paid. Affirm treats that interest as the cost of borrowing, and it’s considered incurred whether or not you keep the product.7Shopify Help Center. Shop Pay Installments FAQ On a large purchase where a return is possible, the interest-free biweekly plan removes that risk if it’s offered.
What You Should See Before You Commit
Before you confirm a Shop Pay installment plan, Affirm is required by federal law to show you the total financing cost in clear terms. The Truth in Lending Act requires that the APR and total finance charge appear prominently before you finalize a loan.8Office of the Law Revision Counsel. 15 USC 1632 – Form of Disclosure; Additional Information You’ll see the APR, the total dollar amount of interest, and the payment schedule before you click through. If those numbers don’t work for you, decline and pick a different payment method at no cost.