How to use buy now pay later to increase average order value

Every time a shopper sees the price at checkout, a percentage of them leave. Buy now pay later removes that friction point by splitting payments into smaller installments. When it works right, it doesn't just recover abandoned carts. It actually makes buyers willing to spend more.

This article covers how to use BNPL strategically to increase average order value, which metrics to track to prove it's working, and how to calculate whether it's actually profitable for your store.

What is buy now pay later?

Buy now pay later is a payment method that lets shoppers split their purchase into smaller installments, usually 4 payments over 6–8 weeks, with no interest. BNPL providers like Klarna, Afterpay, and Affirm handle the credit check and payment collection. You get paid upfront (minus a processing fee), and the provider assumes the credit risk if the customer doesn't complete their payments.

Unlike a credit card, BNPL doesn't require the shopper to have good credit. The approval is fast (often instant), and it doesn't show up on their credit report. For a deeper look at how BNPL works and whether it's right for your store, see our full guide.

Why BNPL lifts average order value

An average e-commerce shopper arrives at your checkout page with a price in mind. If the total is higher than they expected, they leave. If it's lower, they still leave because they got what they came for.

BNPL breaks that pattern. Instead of asking "Can I afford the full amount today?", a shopper sees it reframed: "Can I afford this as four payments of $25?" That's psychological, but it's also real economics. A $100 item that costs $25 per month feels different than a $100 charge. If you're new to BNPL, see what BNPL is and whether it makes sense for your store.

The lift in AOV typically ranges from 20% to 50%, depending on your product category, pricing, and how visibly you display BNPL at checkout. Furniture and fashion see the highest lifts because those are categories where price is already a barrier. A sofa priced at $1,200 becomes $300 per month. A pair of boots at $180 becomes $45 per month.

But the AOV lift only happens if customers actually see BNPL as an option. If it's buried in the payment method dropdown, you won't capture the psychological benefit. If it's prominent on the product page and at checkout, the lift materializes.

Where BNPL works best to increase order size

High-ticket items ($150+)

BNPL has the biggest impact when price is a legitimate barrier. If you sell $50 items, BNPL doesn't move the needle much. A customer who can afford $50 can usually afford it today. But someone eyeing a $500 office chair becomes a buyer when they can pay it in four installments.

Look at your AOV by product category. If you have a category averaging $200+ where 30% of visitors abandon cart, BNPL is a high-leverage lever in that segment.

Discretionary purchases

BNPL works harder when the purchase isn't a necessity. Electronics, furniture, apparel, home decor, and beauty all see higher BNPL adoption and bigger AOV lifts. Essential groceries and supplies convert fine without it.

Younger demographics (18–40)

BNPL adoption is highest among Millennials and Gen Z. If your audience skews older, BNPL might not unlock as much value. Check your traffic sources. If 60% of your visitors are over 45, you still benefit from BNPL because it recovers some of those younger browsers. But don't expect the same conversion lift across the board.

Wide product range (bundles and add-ons)

Stores with bundled offerings or frequent add-on opportunities see the biggest AOV gains from BNPL. A bookstore selling single books at $20 sees minimal lift. A home furniture store where customers bundle a sofa, rug, and side table sees significant lift because BNPL makes the larger bundle feel more achievable. Combining BNPL with upsell and cross-sell tactics multiplies the effect.

How to display BNPL for maximum impact

On the product page

Show the split payment amount prominently below the price. Instead of a $180 price tag, display: "Pay in 4 interest-free payments of $45 with Klarna." This reframing happens before the shopper reaches checkout. Many buyers who add to cart at this point have already made the mental shift from "that's expensive" to "I can afford this."

Don't hide it. Bury it, and you lose the AOV benefit. Put it near the price, or as a live widget that updates when the price changes.

In the shopping cart

Remind shoppers about BNPL when cart value is high. If someone has a $300 cart, showing them "Pay in 4 payments of $75" at the cart page is a cart-saver. It's the moment before abandonment. Use this to recover sales, not to upsell.

At checkout

Make BNPL a default or prominent payment method. Don't bury it below credit cards and PayPal. Many shoppers don't scroll past the first payment option. If BNPL is first or second, more people choose it. If it's sixth, conversion drops.

In email and retargeting ads

Target cart abandoners with a message like: "That item works great in 4 payments of $45." Retargeting to warm audiences with BNPL messaging recovers 8–15% of abandoned carts. Specificity matters — show the exact item and the exact installment amount.

How to choose and integrate a BNPL provider

The major BNPL providers each have different merchant economics, approval rates, and customer experiences. Your choice affects both the AOV lift you see and the fees you pay.

Klarna

Klarna has the highest market share and the broadest customer base. Their checkout integration is quick (2–3 days). Merchant fees are typically 2.9% + fixed fees, and they assume all credit risk. Good for stores that want high volume and lowest friction.

Afterpay

Afterpay has strong adoption among fashion and beauty brands. Approval rates are higher than Klarna for younger audiences. Integration is straightforward, fees similar to Klarna. They're owned by Block, so payment processing is streamlined if you're already in their ecosystem.

Affirm

Affirm is popular for furniture and appliances — higher-ticket items. They tend to approve larger transactions that other providers decline. Fees are higher (3.2–3.5%) but approval rates justify it for furniture stores.

Sezzle and Zip

Sezzle and Zip are lower-cost alternatives (1.9–2.5% fees) but have smaller customer bases. They work well if your audience is already familiar with smaller BNPL providers, but they won't move the needle as much as Klarna or Afterpay for discovery.

Most successful stores integrate 2–3 providers. This gives shoppers choice and maximizes approval rates. Klarna + Afterpay is the most common combination.

Measuring the true AOV impact of BNPL

Offering BNPL is not the same as measuring BNPL's impact. Many stores turn it on and assume the AOV lift is real. But without proper measurement, you're guessing.

Set up proper analytics

Tag BNPL transactions separately in your analytics. If you're using WEMASY's analytics, create a custom field for payment method. This lets you segment: AOV for credit card customers vs. AOV for BNPL customers vs. AOV for all shoppers.

A shopper who buys via BNPL was likely someone who would have abandoned without it. But some BNPL customers would have bought via credit card anyway. To isolate the real impact, look at incremental AOV — the additional revenue from customers who bought because BNPL was available, not from customers who switched payment methods.

Run a controlled test

A/B test BNPL on specific products or categories. Offer BNPL on one product category for 4 weeks and not on another. Compare:

• Conversion rate (BNPL category vs. control)
• AOV for BNPL vs. non-BNPL customers in the same category
• Cart abandonment rates

This tells you whether BNPL actually moved the needle or whether the AOV increase came from seasonal trends or other variables.

Track these metrics over time

BNPL conversion rate

% of shoppers who reach checkout and choose a BNPL option. This should increase as you optimize placement and promotion.

AOV for BNPL transactions

Total order value of BNPL purchases compared to other payment methods. This is your primary metric for measuring the AOV lift.

Cart recovery rate

% of abandoners who come back and complete a purchase after seeing BNPL retargeting. BNPL is one of the most effective cart recovery tactics.

Repeat purchase rate

Do BNPL customers buy again? Many do, because BNPL removes friction. Tracking this tells you whether BNPL attracts one-time buyers or repeat customers.

Chargeback and default rates

BNPL providers handle credit risk, but monitor your default rate. If it exceeds 2–3%, your customer quality or targeting may be shifting.

Calculating the ROI of BNPL for your store

BNPL costs you money (provider fees), but it brings in additional revenue. Only offer it if revenue gain exceeds costs.

Calculate your baseline

Measure your current state for one month before turning on BNPL:

• Total transactions: 500
• Average transaction value: $120
• Total revenue: $60,000
• Cart abandonment rate: 68%

Project the impact

Assume BNPL delivers a 25% AOV lift (conservative for most categories). That's an additional $30 per BNPL customer. Assume 30% of customers choose BNPL (varies by store, but 20–40% is typical). That's 150 BNPL customers.

Additional revenue: 150 customers × $30 = $4,500 per month.

Subtract the cost

Klarna charges 2.9% on successful transactions. If 150 transactions at $150 (the BNPL cart size) go through, that's 150 × $150 = $22,500 in BNPL volume. 2.9% fee = $652 per month.

Net gain: $4,500 - $652 = $3,848 per month.

This is conservative. You also recover some abandoned carts (another 5–10% revenue boost), but the calculation above shows the core math.

Monitor and adjust

Run BNPL for 8–12 weeks and measure actual results against this projection. If your store is converting at 25% AOV lift, the ROI is positive. If it's 10%, you might negotiate lower fees or test a different provider. If it's 0%, BNPL might not be the right tool for your category.

Common mistakes that kill BNPL ROI

Integrating but not promoting

Many stores flip on BNPL and expect shoppers to discover it. They won't. You have to make it visible. Use email, social ads, and on-site widgets to tell your audience BNPL is available.

Offering BNPL on everything

BNPL doesn't help a $15 impulse purchase. It helps a $200+ purchase where price is a real barrier. Restrict BNPL to products over a minimum price threshold. This reduces cart value on small orders and keeps your focus on where it matters.

Not tracking the right metrics

Stores that say "BNPL didn't work" usually never measured it properly. You need baseline metrics before launch, not guessing after the fact. Set them up first.

Ignoring default rates

While BNPL providers assume credit risk, you still need to monitor your default rate. If it spikes, your customer quality might be shifting. Adjust your targeting or product mix if defaults exceed 3%.

How WEMASY helps you track and optimize BNPL

WEMASY's e-commerce system and analytics let you segment transactions by payment method and track AOV by customer cohort. You can create custom fields for BNPL transactions and build reports that show exactly which products and categories see the biggest AOV lift from BNPL.

See which payment methods drive the highest AOV and repeat purchases. Build dashboards that update in real time. Use this data to optimize product placement, pricing, and promotions. Learn how WEMASY's analytics help you understand and grow your store.

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