Amazon Prime Day Just Made June's Retail Report Look Fine. If You Charged It, Watch the Statement Close Date.

If you bought anything on Amazon Prime Day and it’s still sitting on your credit card, the discount is renting itself back to you at 22 percent.

The Commerce Department released June retail sales this week. Total sales rose 0.2 percent, short of the 0.3 percent economists expected. Strip out gas stations, where receipts fell 5.3 percent because pump prices dropped, and consumer spending rose a solid 0.7 percent. Online sales alone jumped 1.9 percent. Commerce credited “spending surrounding Amazon’s Prime Day event, which was held from June 23 through June 26.”

Translation: the resilient-consumer headline you’re reading was mostly Amazon.

Here’s what the retail number doesn’t tell you. It counts the swipe, not the balance. The Bureau of the Census records the sale on the day the card ran. Whether the shopper paid it off, carried it, or is still carrying it isn’t part of the number. If Prime Day did what Prime Day usually does, a large chunk of that 1.9 percent surge is now sitting on July statements at 22.15 percent APR, the average rate on cards accruing interest per the Federal Reserve’s G.19 report for May.

Do the math on a $500 Prime Day haul. Carry it one month and you pay about $9 in interest to keep the same package. Carry a $500 balance for a full year and financing that “deal” runs you about $110. Pay it every month at that size and you’re spending $110 a year for the privilege of not paying $500. That’s not a deal. That’s a slow leak.

The one date that decides whether your Prime Day held or not is your statement close date. Not the due date. Close date.

If your card closed on July 22 and you paid the Prime Day charges to zero by July 21, the deal held. If you didn’t, interest started accruing on those purchases from the swipe date, not the statement date. That’s the fine print most people never read. Grace-period rules only work if the previous cycle closed at a zero balance. Carry any balance forward and new purchases owe interest from day one.

Do this now. Open the card app tonight. Find the statement close date. If it’s within a week, pay the balance to zero before it closes, not before the due date. If you can’t pay it to zero, at least pay it before the due date so the finance charge doesn’t repeat next month. Set a reminder four days before the close date and check the balance again then.

Prime Day is fine if the card is paid off by close. It’s a bleed if it isn’t. Twenty-two percent is the price tag the Prime Day banner leaves off. If you’re shopping for a card that doesn’t punish a carried balance quite so hard, our credit card lists rank offers by score, not by ad spend.

How Candid Yak makes money. Some of the products we write about pay us if you apply or sign up through our links. That never changes our verdict, our rankings, or the numbers in this article. We call a bad deal a bad deal whether it pays us or not. Some brands shown in our comparison tools are placeholder examples while we finalize partner agreements, and we label them as such.