After the BNPL Bust: The Installment Payment Models That Are Actually Building Sustainable Businesses

The buy now, pay later narrative has had a rough few years. Affirm's stock lost roughly 90 percent of its value from its 2021 peak before staging a partial recovery. Klarna slashed its valuation by nearly 85 percent ahead of its IPO process. Zip shuttered its U.S. operations. The headlines practically wrote themselves: BNPL was a zero-interest-rate-era anomaly, a product that made sense only when capital was free and credit losses were theoretical.

That obituary, however convenient, is premature — and it misidentifies the actual problem. The original BNPL model, characterized by consumer-facing apps offering four-payment splits on discretionary purchases, was never the whole story. It was the loudest chapter. The installment payment market itself is evolving rapidly, and the models gaining traction today look substantially different from the ones that dominated fintech coverage in 2021.

What Broke the Original Model

To understand where the market is heading, it helps to be precise about what went wrong. First-generation BNPL companies built their businesses on a fundamental tension: they charged merchants interchange-like fees to subsidize zero-interest consumer loans. That model worked as long as default rates stayed low and customer acquisition costs remained manageable.

Both assumptions collapsed simultaneously. Rising interest rates increased the cost of funding those loans. Inflation-stressed consumers began missing payments at higher rates. And the customer acquisition economics, always fragile, became untenable as every major competitor flooded the same digital advertising channels. Afterpay, Klarna, and Affirm were essentially running expensive consumer finance businesses dressed up in fintech aesthetics.

The merchants who paid those fees began asking harder questions about return on investment. For large retailers, BNPL had delivered measurable lift in average order value during the pandemic-era e-commerce boom. Post-boom, the incremental revenue was harder to justify against fees that could reach five or six percent of transaction value.

Embedded Installments: The Quiet Infrastructure Play

The model gaining the most institutional momentum right now is not a consumer app at all. It is installment financing embedded directly into e-commerce checkout flows, often invisible to the end user as a distinct product.

Shopify's Shop Pay Installments, powered by Affirm's infrastructure, is the clearest example of this shift. The product is not marketed as a standalone BNPL service — it is simply a checkout option within an ecosystem that merchants already use. The distribution advantage is enormous. Shopify processes hundreds of billions of dollars in annual gross merchandise volume, and every merchant on the platform gains access to installment options without a separate integration or negotiation.

Several fintech founders building in this space describe the opportunity in similar terms: the consumer does not need to know or care about the financing layer. What matters is that the option exists at the moment of purchase, within an interface the consumer already trusts. That friction reduction is worth more than any standalone app's loyalty program.

For fintech platforms pursuing this model, the unit economics are meaningfully different from first-generation BNPL. Revenue comes from platform fees and interest income on longer-term financing products rather than pure merchant discount rates. The credit exposure is also more diversified, spread across thousands of merchants and millions of transactions rather than concentrated in high-risk discretionary categories.

Point-of-Sale Financing for Business Customers

While consumer BNPL captured most of the attention, a parallel market for business-to-business installment financing has been developing with considerably less fanfare — and considerably better margins.

Companies like Resolve and Behalf built their businesses around extending net terms and installment options to small and mid-sized businesses purchasing from suppliers. The value proposition is straightforward: a small contractor who needs to purchase $40,000 in equipment can receive that inventory immediately while paying over 90 or 120 days. The supplier gets paid upfront. The financing company earns interest income from the business borrower.

This model benefits from several structural advantages over consumer BNPL. Business credit is easier to underwrite using cash flow data and invoice history. Default rates in B2B lending are historically lower than in consumer unsecured credit. And the average transaction size is substantially larger, improving the economics of each underwriting decision.

Merchant data from platforms operating in this space indicates that suppliers offering embedded net-terms financing see meaningful increases in repeat purchase rates — a metric that is far more durable than the average order value bump that BNPL promised retailers.

Subscription-Based Payment Flexibility: A Different Kind of Installment

A third model gaining traction reframes the installment concept entirely. Rather than financing a specific purchase, subscription-based payment flexibility products allow consumers to smooth irregular income against predictable expenses.

Current, Dave, and several other neobanks have built products that allow users to advance a portion of their expected paycheck before the official pay date — effectively providing a short-term installment bridge without the formal credit structure of traditional BNPL. These earned wage access products have grown substantially among hourly workers and gig economy participants, segments that were underserved by the original BNPL model's focus on discretionary retail.

The regulatory environment for earned wage access remains unsettled, with the Consumer Financial Protection Bureau actively examining whether these products constitute credit under the Truth in Lending Act. That uncertainty is a genuine risk. But the underlying demand — consumers wanting flexibility around payment timing rather than just payment splitting — is real and growing.

Which Approaches Are Actually Profitable

Profitability in installment payments is no longer a theoretical aspiration. It is the primary criterion by which investors, merchants, and platform partners are evaluating these businesses.

The embedded infrastructure model has the clearest path to sustainable margins, primarily because distribution costs are absorbed by the host platform. The B2B installment model has demonstrated profitability at scale, with several players in this category generating positive net income. The earned wage access model is more variable, with profitability dependent heavily on subscription pricing and the degree to which users engage with adjacent financial products.

What all three of these models share is a departure from the original BNPL playbook: they are not competing on consumer brand recognition, they are not subsidizing zero-interest products indefinitely, and they are not relying on discretionary retail volume to justify their existence.

The Installment Market's Next Phase

The installment payment category is not dying. It is maturing — shedding the unsustainable growth mechanics of its adolescence and developing the unit economics that durable financial businesses require. For fintech operators, the opportunity lies not in resurrecting the consumer-facing BNPL brand but in building the infrastructure layer that makes flexible payment options available wherever commerce occurs.

The companies that will define this market over the next five years are those that treat installment financing as a feature of a broader payment or commerce stack rather than a standalone product. In that framing, the BNPL era was not a failure — it was an expensive proof of concept that demonstrated real consumer demand for payment flexibility. The businesses being built on that foundation today are more disciplined, more diversified, and considerably more likely to still be operating when the next market cycle turns.