Setting Up Buy-Now-Pay-Later (BNPL) Options

Buy-Now-Pay-Later (BNPL) options are transforming the UK e-commerce landscape, giving customers more flexibility and businesses a powerful tool to increase sales and average order value. But integrating BNPL isn’t as simple as adding a payment button—there are regulatory, financial, technical, and reputational considerations you must get right. In this definitive guide, you’ll get step-by-step advice tailored to UK small businesses: who the main BNPL providers are, how to set up the service, what it costs, what legal obligations you face, and how to make the most of BNPL while avoiding the common pitfalls.

Buy-Now-Pay-Later (BNPL) lets customers spread the cost of their purchases over several instalments, often interest-free, at checkout. For UK small businesses, offering BNPL can drive higher conversion rates, increase average order values, and attract younger, budget-conscious shoppers who expect flexible payment options. According to the Financial Conduct Authority (FCA), the use of BNPL in the UK has surged in recent years, with over 17 million people using BNPL services in 2023.

The typical BNPL journey is simple for the customer: they select a BNPL option at checkout, undergo a quick approval (usually a soft credit check), and pay either in instalments or after a set delay. The merchant gets paid upfront (minus fees), while the BNPL provider takes on the risk of collecting payments from the customer. This can be a win-win, but it's not without its drawbacks, notably the cost to you, the merchant, and the reputational risks if customers encounter problems.

UK SMEs need to recognise that the BNPL market is rapidly evolving. Regulation is tightening, customer expectations are growing, and the range of providers is expanding. Before diving in, it’s vital to understand not just how BNPL works, but what it means for your brand, your cashflow, and your responsibilities under UK law.

• BNPL can increase basket sizes by up to 60% (Klarna data).
• Most BNPL providers pay you upfront, reducing your credit risk.
• BNPL is most popular among 18-35 year olds in the UK.
• BNPL purchases now account for over £16 billion annually in the UK (FCA estimate).

There are several major BNPL providers in the UK market, each with their own integration methods, customer base, and fee structures. The most prominent are Klarna, Clearpay (Afterpay), PayPal Pay in 3, Laybuy, and Openpay. Some UK-focused providers, like Zilch and Butter, are also gaining traction with niche audiences. Choosing the right one depends on your business size, sector, target market, and e-commerce platform.

Klarna leads the UK market, especially for fashion and lifestyle retailers. Clearpay is strong with millennials and Gen Z shoppers, particularly in beauty and fashion. PayPal Pay in 3 appeals to customers who already use PayPal, offering seamless integration if you already accept PayPal payments. Smaller providers like Laybuy and Openpay can offer more tailored support for SMEs, but may have a smaller user base.

Your choice should be driven by your customers' preferences, the technical fit with your e-commerce platform (e.g., Shopify, WooCommerce, Magento), and the cost structure. It’s worth noting that you can offer more than one BNPL option, but too many choices at checkout can confuse customers and reduce conversion. Always check the provider’s UK FCA registration status and read recent reviews—both from merchants and customers.

The main cost of offering BNPL is the merchant fee—a percentage of each transaction, plus a fixed fee. These fees are significantly higher than standard card processing rates, typically ranging from 2.5% up to 6% per sale, depending on the provider and your turnover. For example, Klarna charges around 2.79% + 20p per UK transaction, while Clearpay can be as high as 6% for small merchants.

For most SMEs, BNPL providers pay you the full order value upfront (minus fees), usually within 1-2 business days. This means you avoid the credit risk and late payment headaches. However, these higher fees can quickly erode your profit margins, especially on low-margin products. It’s crucial to factor BNPL fees into your pricing strategy, and to monitor whether the increased conversion and basket size outweigh the extra cost.

Some providers offer volume-based discounts, or bespoke rates for larger retailers. Always negotiate, especially if you predict high BNPL volumes. Remember, refunds can be more complex with BNPL—if a customer returns an item, you may still pay the BNPL fee, or need to manage the refund through the provider’s portal. Read the small print, and clarify your obligations before you go live.

• BNPL fees are usually 2.5%-6% per transaction (much higher than card fees).
• You typically receive funds within 1-2 business days.
• You are shielded from customer default risk—BNPL providers chase late payers.
• Refunds and partial refunds can be more complex and may still incur fees.
• Volume can lower fees—negotiate if you expect high sales via BNPL.

BNPL is currently regulated in the UK under a light-touch regime, but this is changing rapidly. In February 2021, the UK Treasury announced plans to bring BNPL under full FCA regulation. As of June 2026, draft legislation is in progress, with new rules expected to come into force in late 2024 or early 2025. Until then, most BNPL providers operate under exemptions to the Consumer Credit Act 1974. This means you, as a merchant, don’t currently need FCA authorisation to offer BNPL through a regulated provider—but you must still comply with consumer protection laws.

Your main compliance duties include transparent communication of BNPL terms, fair advertising, and clear disclosures about the consequences of missed payments. The Competition and Markets Authority (CMA) and the Advertising Standards Authority (ASA) have both cracked down on misleading BNPL promotions. You must state key facts—such as late fees and the impact on credit scores—clearly at the point of sale and in your marketing materials.

When the new FCA regulations arrive, merchants may face stricter requirements, especially regarding affordability checks and customer complaints. It’s wise to keep up-to-date with FCA announcements and review your customer journey to ensure compliance. If you offer in-house instalment plans (not via a regulated BNPL provider), you may need direct FCA authorisation as a credit broker—seek specialist legal advice in this case.

• You must display BNPL terms clearly at checkout and in marketing.
• Do not mislead customers about 'interest-free' or 'no fees' if late fees apply.
• Keep up-to-date with FCA regulatory changes (see GOV.UK and FCA sites).
• If you run your own instalment scheme, you may need FCA authorisation.
• Record and resolve BNPL-related complaints promptly and transparently.

Most leading BNPL providers offer plug-ins or apps for major UK e-commerce platforms like Shopify, WooCommerce, Magento, and BigCommerce. Integration can usually be done in under an hour for plug-and-play solutions, but some platforms or custom sites may require developer support. The key steps include creating a merchant account with the BNPL provider, configuring the app or plugin, and testing the checkout process thoroughly before going live.

For Shopify, Klarna, Clearpay, and Laybuy all have official apps in the Shopify App Store. WooCommerce users can access plugins via the official WooCommerce marketplace. Magento users usually need to install an extension and may need developer support for custom themes. For bespoke websites, providers can supply API documentation, but you’ll likely need a web developer to handle the coding and ensure PCI DSS compliance.

Don’t overlook the importance of branding and user experience. BNPL providers often supply on-site messaging widgets—banners, product page prompts, and checkout logos—to highlight the availability of flexible payments. These can boost conversion, but must be implemented in line with the provider’s brand guidelines and UK ASA advertising standards. Always test the full customer journey, including refunds and failed payments, before launching.

Offering BNPL is about more than just adding a new button. To maximise its benefits and minimise risks, you need to promote it responsibly and manage customer expectations. Start by clearly highlighting BNPL availability on product pages, in your basket, and at checkout. Use provider-supplied widgets, but also craft your own messaging that explains how BNPL works, what the terms are, and who is eligible.

Transparency is critical. The ASA has fined UK retailers for promoting BNPL as 'interest-free' without mentioning late fees or the risk to credit scores. Always include mandatory warnings and clear links to full terms and conditions. Train your customer service team to handle BNPL-related queries and complaints—customers sometimes blame the retailer for issues with the BNPL provider.

Monitor your BNPL sales data. Most providers offer dashboards to track uptake, conversion rates, and average order value. Use this data to refine your marketing—for example, by offering BNPL on higher-priced items or as a limited-time promotion. Watch for signs of customer distress (e.g., repeated failed payments) and consider restricting BNPL for vulnerable customers to avoid reputational or regulatory harm.

• Always disclose late fees, credit risk, and repayment schedules clearly.
• Feature BNPL options on product pages—not just at checkout.
• Train your staff to answer BNPL questions and handle disputes.
• Don’t over-promote BNPL on essentials or to vulnerable customers.
• Monitor uptake and tweak your offers based on real sales data.

While BNPL can drive sales, it’s not without risk for UK SMEs. The higher merchant fees can erode margins, particularly if uptake is high but order values remain low. Refunds can be more complex—some providers retain their fee even if the order is returned, and you’ll need to process refunds through the BNPL dashboard, adding admin time.

Reputational risk is real. If customers get into debt or are hit with unexpected late fees, you may find yourself fielding complaints or negative reviews—even if the BNPL provider is technically responsible. With regulation tightening, you may also face increased compliance burdens in the near future, with potential fines for non-compliance.

Another pitfall is over-reliance on BNPL for sales growth. If too much of your business depends on BNPL, you could be exposed if a provider exits the UK market (as some have), or if regulation makes offerings less attractive. Diversify your payment options, and regularly review your BNPL provider’s financial health and FCA status.

• High BNPL fees can destroy margins on low-value or low-margin items.
• Refunds with BNPL are slower and more complex than standard payments.
• Customer complaints may rise if BNPL terms aren’t clear or if payments are missed.
• New FCA rules could increase your compliance workload and costs.
• Provider instability—several BNPL companies have exited the UK in recent years.

BNPL works best for UK businesses selling higher-value discretionary goods—fashion, electronics, homewares—where customers want to spread costs over time. If your average basket is above £50, BNPL can meaningfully increase conversion and encourage larger orders. For low-ticket or low-margin items, the high fees rarely make sense.

Consider your customer demographics. BNPL is most popular with 18-35 year olds, but uptake is growing in older segments. If your audience is mainly older or B2B, BNPL may have limited impact. Also, consider your cashflow—if you rely on instant access to all funds, check payout times and refund processes carefully.

Finally, assess your operational capacity. You’ll need to handle more complex refunds, manage disputes, and monitor new compliance obligations. If you have a small team or basic systems, start with a single BNPL option and scale up only if the results justify the admin and cost.

• BNPL makes sense for average orders over £50 and margins above 15%.
• If your audience is under 35, BNPL can be a strong conversion driver.
• For essentials, groceries, or low-ticket items, BNPL is rarely worth it.
• Expect more customer service queries—factor in the support cost.
• Test BNPL for 3-6 months and compare conversion rates before fully committing.