BNPL: Buy Now Pay Later for ecommerce

Price is almost always the main reason someone abandons a cart. It's not that they dislike the product — it's that the upfront cost in that specific moment blocks the decision. BNPL — Buy Now Pay Later — attacks exactly that friction point.

The data is clear: offering deferred payment at checkout reduces cart abandonment by an average of 20%, and in the 18–34 age segment that impact rises to 29%. This isn't a passing trend; it's a structural shift in how consumers manage their online purchases.

What BNPL is and how it works

BNPL lets the buyer split the total amount into instalments — typically 3 or 4 — with no interest for the consumer. The BNPL provider pays the merchant the full amount (minus their commission, between 2% and 6%) and assumes the credit risk.

The flow from the user's perspective is simple:

1. Choose BNPL at checkout
2. Complete a quick identity check (seconds, not minutes)
3. Approve the payment plan
4. Purchase confirmed; the merchant gets paid immediately

For the buyer, the psychological barrier of paying €300 becomes paying €100 today. The effect on price perception is immediate.

Main providers in the Spanish market

Provider	Instalments	Strong markets	Approx. fee
Klarna	3 interest-free + financing	ES, DE, UK, SE	2.49% + fixed
Sequra	3–12 instalments	ES, PT, IT	1.49–4%
Scalapay	3 instalments	ES, IT, FR	3.95%
Alma	2–4 instalments	ES, FR	1–3.2%

Sequra has the largest penetration in the Spanish market and stands out for its particularly fast approval process. Klarna brings brand recognition among younger audiences who already use it regularly in other stores.

When it makes sense to implement BNPL

BNPL isn't universal. There are contexts where the return is clear and others where the commission you pay barely translates into improved conversion.

It makes a lot of sense when:

• Your average order value exceeds €80–100. Below that threshold, the instalment argument is weak.
• You sell in categories with considered purchasing: premium fashion, electronics, sport, home.
• Your audience is between 18 and 40 years old.
• You have checkout abandonment rates above 65%.

It makes less sense when:

• Your product has a low ticket price (under €30): BNPL adds friction without reducing the real barrier.
• You sell subscriptions or digital products without physical delivery: many providers don't operate well in this segment.
• Your margins are very tight and a 3–4% commission wipes out order profitability.

How to implement BNPL without breaking the checkout

The most common mistake is adding BNPL as a button at the end of checkout, almost hidden away. The real impact comes when you integrate it throughout the entire purchase funnel:

On the product page: show the monthly price alongside the total price. "Just 3 × €33" changes price perception before the user even reaches the cart.

In the cart: remind them they can pay in instalments before they enter checkout. It reduces the friction of the final decision.

In the checkout: position BNPL at the same visual level as the credit card. If you bury it at the bottom of the payment methods list, users ignore it.

In abandoned cart emails: mention the deferred payment option in the subject line or opening paragraph.

Risks and considerations

Adopting BNPL has real costs that need to be calculated before deciding:

• Transaction fee: between 2% and 6% of each order. If your gross margin is 30%, you're giving away between 7% and 20% of that margin.
• Returns: the returns process with BNPL is more complex. Make sure your provider handles partial refunds well.
• User experience if declined: a credit check rejection mid-checkout can create more friction than not offering BNPL at all. Handle that error state carefully.

The right way to evaluate the impact is a clean A/B test: activate BNPL for 50% of traffic for at least 3–4 weeks and measure conversion, average order value and net margin — not just raw conversion rate.

Metrics to watch

Beyond conversion rate, BNPL analysis should include:

• Average order value with BNPL vs without: it typically rises between 15% and 30%.
• Return rate by payment method: BNPL users tend to return more. It's a data point many merchants overlook.
• Net margin per order: the only metric that matters at the end of the day.

If you want to analyse the real impact of BNPL on your checkout and measure whether it pays off for your business model, at Boost we do it with structured tests. You can explore our methodology at our CRO agency or start by scanning your store at Scan&Boost.

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Adrià Vidal — Boost · Conversion Rate Optimization