The Debt You Cannot See: Inside America's Buy Now, Pay Later Boom

It appears at the checkout as a friendly little offer: split this purchase into four easy payments, with no interest and no hassle. Buy now, pay later has become one of the most familiar buttons in all of online shopping, and in 2026 that quiet convenience has grown into a real force reshaping how Americans spend, borrow, and even eat.

A boom built on four payments

The sheer scale of the trend is striking. Buy now, pay later loans totaled roughly 70 billion dollars in transactions across 2025, having grown at about 20 percent a year since 2021, even though they still make up only around 1 percent of all credit card spending in the country.

The user base has swelled right along with it. Some 91.5 million Americans now use services like Klarna, Affirm, and Afterpay, splitting everything from electronics to clothing into bite-sized installments that feel far less like borrowing than a simple, harmless payment plan.

What has changed most is what people are actually financing. Nearly 30 percent of Americans now use these loans to buy their groceries, almost double the share of just two years earlier, a shift that turns a tool for big-ticket splurges into a way to cover the ordinary weekly shop.

The debt hiding in plain sight

The most unusual feature of BNPL is quite how invisible it has been. For years, most of these loans were never reported to the credit bureaus, meaning a lender weighing a mortgage or a car loan often could not see how many installment plans a borrower was already quietly juggling.

That blind spot has earned the debt a fitting nickname: phantom debt. A single shopper could have five or even ten separate BNPL plans running at once, a very real obligation that simply did not appear on the credit reports that lenders rely on to judge who can afford to borrow more.

The average balance is small, which is part of both the appeal and the risk. A typical BNPL debt sits at only around 135 dollars, low enough to feel completely harmless, yet easy to stack into a tangle of overlapping payments that becomes genuinely hard to track across several different apps.

Cracks in the convenience

The friction is now starting to show up in the numbers. More than 40 percent of BNPL users said they were late on at least one payment in the past year, up from roughly a third the year before, a clear sign that the easy installments are not always quite so easy to keep up with.

The lending also skews toward riskier borrowers. Research shows that a large share of these loans go to people with subprime or deep subprime credit, the very shoppers for whom a single missed payment or a pile of overlapping plans can do the most lasting financial damage.

For now, at least, the wider danger looks fairly contained. Total outstanding BNPL debt sits at only about 3 billion dollars, a rounding error next to the 1.23 trillion Americans owe on their credit cards, which is why economists still describe its threat to financial stability as limited at present.

Why even non-users pay

Here is the twist that surprises a lot of shoppers. A study from Washington University in St. Louis found that retailers often raise their sticker prices to cover the fees these services charge, which means that higher cost is quietly passed along to every single customer, not just the ones who finance.

In effect, the careful end up subsidizing the convenient. As one researcher behind the study put it rather bluntly, retailers that accept these payments tend to raise their prices, so all of us end up paying more, whether we ever tap the buy now, pay later button ourselves or not.

The end of the invisible loan

The era of hidden BNPL debt is now finally drawing to a close. Affirm began reporting its loans to the credit bureaus back in 2025, and the newest credit-scoring models have started folding BNPL payment history into the very scores that shape everything from mortgages to interest rates.

That new visibility could easily cut both ways for borrowers. Responsible users may finally get real credit for paying on time, while those quietly drowning in overlapping plans could see it catch up with them, turning a once invisible convenience into something with genuinely lasting consequences.