Buy Now Pay Later for Merchants: Should Your Business Offer BNPL in 2026?

Buy now, pay later has gone from a niche fintech trend to a mainstream payment method in less than five years. Over 75 percent of US consumers have used a BNPL service at least once, and transaction volume exceeded $120 billion in 2025. For merchants, the question is no longer whether BNPL is a real trend — it is whether offering it makes financial sense for your specific business.

The BNPL landscape in 2026 is dominated by a handful of major players. Klarna, the Swedish fintech that pioneered the modern BNPL model, serves over 150 million consumers globally and partners with 500,000 merchants. Affirm, founded by PayPal co-founder Max Levchin, specializes in longer-term financing for higher-ticket purchases. Afterpay, acquired by Block (formerly Square) in 2022 for $29 billion, is deeply integrated into the Square ecosystem and has a strong presence in retail and fashion. Apple Pay Later, launched in 2023, leverages the massive iPhone user base to offer BNPL directly through Apple Wallet.

How does BNPL work from the merchant's perspective? The basic model is simple: the customer makes a purchase, chooses BNPL at checkout, and the BNPL provider pays you (the merchant) the full purchase amount upfront — minus a merchant fee. The customer then repays the BNPL provider in installments, typically four equal payments over six to eight weeks (the pay-in-four model) or monthly payments over 3 to 36 months for larger purchases. The key point for merchants is that you receive payment immediately — the BNPL provider assumes the credit risk and handles collections.

The merchant fees are where BNPL gets expensive. BNPL providers typically charge merchants 3 to 8 percent of the transaction amount, depending on the provider, your industry, and your transaction volume. Klarna's merchant fees generally range from 3.29 percent plus $0.30 to 5.99 percent plus $0.30 per transaction. Affirm charges 2 to 8 percent depending on the financing term. Afterpay charges approximately 4 to 6 percent plus $0.30. Compare these to standard credit card processing fees of 1.5 to 3 percent, and the cost premium is significant.

Why would a merchant pay 5 to 8 percent in BNPL fees when credit card processing costs 2 to 3 percent? The answer is conversion and average order value. BNPL providers consistently report that merchants offering BNPL see increases in conversion rate (customers who complete a purchase rather than abandoning checkout) and average order value (customers spend more when they can split the payment). Klarna claims merchants see a 45 percent increase in average order value. Afterpay reports a 22 percent increase in conversion rate. These numbers are self-reported by companies with an obvious interest in promoting their product, but even independent studies have confirmed a measurable lift in both metrics.

The math works differently depending on your margins and average ticket size. For a business with 60 percent gross margins selling products at $200 or more, the incremental revenue from higher conversion and larger order sizes can easily exceed the additional BNPL fees. For a business with 20 percent gross margins selling $30 items, the 5 to 8 percent BNPL fee may eat into margins without a meaningful lift in sales. The general rule: BNPL makes the most financial sense for businesses with higher-margin products and services, average order values above $100, and a customer base that skews toward younger demographics (18 to 40) who are most likely to use BNPL.

The consumer demographics tell an interesting story. BNPL adoption is highest among Gen Z and Millennial shoppers — 62 percent of Gen Z consumers have used BNPL in the past year, compared to 38 percent of Gen X and 18 percent of Baby Boomers. If your customer base skews younger, offering BNPL may be a competitive necessity rather than a nice-to-have. Conversely, if your typical customer is over 50, BNPL adoption rates suggest it will have less impact on your sales.

Integration complexity varies significantly by provider and by whether you operate in-store, online, or both. For e-commerce, most BNPL providers offer simple integrations — a JavaScript widget that adds a BNPL button to your checkout page, often with just a few lines of code. Shopify, WooCommerce, BigCommerce, and other major e-commerce platforms have native integrations with Klarna, Affirm, and Afterpay. For in-store purchases, integration typically requires your POS system to support the BNPL provider. Square POS has native Afterpay integration (unsurprisingly, since Block owns both). Klarna offers in-store payment through their app using a virtual card. Affirm supports in-store payments through select POS systems.

There are regulatory developments worth monitoring. The Consumer Financial Protection Bureau (CFPB) has been increasing oversight of BNPL providers, requiring them to comply with many of the same consumer protection rules that apply to credit cards. This includes dispute resolution rights, billing error protections, and clearer fee disclosures. For merchants, increased regulation of BNPL providers is generally positive — it creates a more level playing field and ensures consumers understand the terms of their BNPL agreement, which should reduce disputes and returns.

Returns and refunds with BNPL require careful handling. When a customer returns a product purchased through BNPL, the refund must be processed through the BNPL provider's system, not directly to the customer. The BNPL provider then adjusts the customer's payment schedule or issues a refund for payments already made. This process can be slower and more complex than a standard credit card refund. If your business has a high return rate (common in apparel and fashion), factor in the operational overhead of BNPL refund processing.

Chargebacks and fraud are handled differently with BNPL compared to traditional card payments. Because the BNPL provider pays you upfront and extends credit to the customer, fraud risk is largely borne by the BNPL provider, not the merchant. If a customer disputes a BNPL transaction, the provider handles it. However, if a customer claims they never received a product, the BNPL provider may request proof of delivery from you. Maintaining shipping documentation and delivery confirmation is important for any BNPL transaction.

Should your business offer BNPL? Here is a practical decision framework. Offer BNPL if: your average order value is above $100, your gross margins are above 40 percent, your customer base includes significant representation under age 40, you sell discretionary products or services where financing influences purchasing decisions, and your competitors already offer BNPL (in which case you may lose sales by not offering it). Think carefully about BNPL if: your margins are thin, your average ticket is under $50, your customer base skews older, or your product is a necessity that customers will purchase regardless of payment options.

If you decide to offer BNPL, consider starting with one provider rather than integrating multiple platforms. Klarna has the broadest consumer awareness and strong e-commerce integration. Afterpay is the best option if you use Square POS for in-store transactions. Affirm is strongest for higher-ticket purchases ($500+) where longer financing terms are attractive. You can always add additional providers later once you see how BNPL performs for your business.

At Optec, we help merchants integrate flexible payment options including BNPL alongside their existing payment processing. Our team can analyze your transaction data and customer demographics to determine whether BNPL makes financial sense for your business. We also help merchants negotiate BNPL merchant fees — high-volume merchants can often secure rates below the standard published fees. Contact our team at /contact for a free consultation on adding BNPL to your payment stack.