Checkout, Payments & Conversion
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Common Questions
What's a reasonable QA budget or time allocation, as a percentage of total dev time, for checkout testing on a mid-market Shopify Plus store?
Checkout QA is budgeted by test matrix, not as a percentage of development hours. No published benchmark sets a defensible checkout QA share. Capgemini's World Quality Report 2025-26 does not publish one (verified September 2026). Count the combinations you must prove instead: payment methods × discount stacking × tax and duty × customer type × market.
Why do some Shopify Plus merchants report their Checkout Extensibility migration went smoothly while others describe it as their worst platform experience of the year?
Migration difficulty tracks one variable: how many of your checkout customizations depend on a third party's release schedule. Shopify's own developer docs name the cause, stating that apps which had not rebuilt their script-tag functionality as UI extensions or web pixels were "blocking both Plus and non-Plus merchants from upgrading" (shopify.dev, September 2026). Stores with no app dependency audited clean in days.