Measuring the real conversion cost of payment method choice

Stripe’s position in the payments ecosystem—it processed $1.4 trillion in transaction volume last year, roughly 1.3% of global GDP—makes it possible to run holdback experiments that would be statistically meaningless for most businesses. The company recently used that scale to test a specific question: what happens to conversion and revenue when additional payment methods beyond cards are dynamically shown at checkout?

The experiment ran within Stripe's Optimized Checkout Suite and covered more than 50 eligible payment methods. The aggregate results are clear: when at least one additional relevant payment method was surfaced, businesses saw an average 7.4% increase in conversion rate and a 12% increase in revenue on average. The effect scaled with the number of relevant methods offered.

Local methods can be decisive

The headline numbers mask significant variation by geography and industry. Stripe segmented the data across both dimensions, and the differences are stark:

  • Alipay for customers in China: 91% conversion increase
  • BLIK for customers in Poland: 46% increase
  • iDEAL for customers in the Netherlands: 39% increase
  • Konbini for digital app businesses selling to Japan: 27% increase
  • PayPal for digital books, music, and movie sellers in Germany: 47% increase
  • Cash App for digital game sellers in the US: 5% increase

The pattern tracks local adoption curves. BLIK accounts for roughly 70% of Polish ecommerce, while Alipay and WeChat Pay together represent about 90% of all mobile payments in China. For businesses expanding internationally, these numbers argue against a one-size-fits-all payments setup.

Digital wallets outperform at checkout

Among the payment method families tested, digital wallets stood out. Global businesses offering Apple Pay saw a 22.3% average conversion lift and a 22.5% revenue boost. WeChat Pay delivered 13% and 14% increases respectively, while Revolut Pay produced a smaller conversion gain (3%) alongside a 13% revenue increase.

The results reinforce what earlier Stripe research found: placement matters as much as availability. Businesses using the Express Checkout Element to display Apple Pay earlier in the flow see roughly double the conversion rate compared with showing it only at the end of checkout.

Bank debits add volume without adding friction

Bank debits are often treated with caution—businesses worry that requiring customers to log in to their bank or enter account details manually will hurt conversion. The experiment data suggests that concern is not universally warranted.

In the US and Canada, ACH Direct Debit and pre-authorized debits respectively had a neutral effect on conversion. For SEPA Direct Debit in the European Union, Stripe measured a 12% conversion increase. More importantly, some bank debit methods produced fully incremental revenue: ACH Direct Debit in the US and Bacs Direct Debit in the UK each showed 100% incrementality, meaning they generated brand-new payment volume rather than simply replacing card transactions.

That points to bank debits attracting a different customer segment—and, since they are lower-cost methods, they can improve margins while reaching that audience. Stripe notes that Instant Bank Payments via Link and Financial Connections are ways to offer these methods with less checkout friction.

Testing payment strategy at the transaction level

The Optimized Checkout Suite exposes more than 40 payment methods through a single integration, and Stripe's AI models handle the eligibility logic per transaction, removing the need to manually encode which methods appear for which customer. For teams that want to validate the findings themselves, Stripe recently added a no-code A/B testing tool for payment methods.

The takeaway from the experiment is that payment method strategy is not a global decision but a per-market, per-industry one. The biggest wins come from matching the customer's local default—whether that is a wallet, a local scheme, or a bank debit rail—rather than from simply adding every available option.