Buy Now Pay Later for Merchants: Complete Implementation Guide

BNPL increases average order value by 20-30% and conversion by 20%. Here is how to add it to your business.

Top BNPL Providers for Merchants

1. Klarna ($0 setup, 3.29% + $0.30)

30 million US customers. Pay in 4, financing up to 36 months. White-label checkout. Strong in fashion and lifestyle. Marketing support for merchants.

2. Afterpay (6% + $0.30)

Most popular in fashion/beauty. Pay in 4 installments over 6 weeks. Zero interest for consumers. Higher merchant fees but strong impulse purchase conversion.

3. Affirm (5.99% average merchant fee)

Longer-term financing (3-60 months). Best for higher-ticket items ($500+). Transparent pricing for consumers (no hidden fees). Shop Pay Installments partnership with Shopify.

4. PayPal Pay Later ($0 extra, included in PayPal)

Built into PayPal checkout at no additional merchant cost beyond standard PayPal rates. Pay in 4 or monthly payments. Leverages PayPal trust and existing user base.

5. Sezzle (6% + $0.30)

Younger demographic (Gen Z focus). Pay in 4 over 6 weeks. Unique credit-building feature for consumers. Growing merchant network.

Impact on Your Business

Metric	Average Impact
AOV increase	+20-30%
Conversion increase	+20%
Cart abandonment decrease	-28%
New customer acquisition	+15%
Return rate	No significant change

Implementation Steps

1. Choose provider: Match your average order value to the right BNPL
2. Integrate: Most offer Shopify/WooCommerce plugins (30-minute setup)
3. Promote on product pages: BNPL messaging on price increases conversion
4. Add to checkout: Multiple BNPL options at checkout performs best
5. Monitor metrics: Track AOV, conversion, and return rates for 90 days

Cost-Benefit Analysis

BNPL fees (3-6%) are higher than standard card processing (2.5-3%). But the AOV and conversion increases typically more than offset the higher fees. A 25% AOV increase with 6% BNPL fees nets you more revenue than standard checkout.