The most common mistake is treating B2B as a discounting problem. Wholesale pricing matters, but it is only one layer. Businesses also need to think about who can log in, what each buyer should see, how many pricing structures are really needed, whether approvals or location-level controls matter, and how reordering and payment should work in practice. The plan decision becomes much clearer once those requirements are mapped properly.
The second mistake is ignoring account architecture. Shopify is explicit that B2B customers must use customer accounts and that legacy customer accounts are not compatible with B2B. In blended B2B and D2C stores, Shopify also notes that switching to customer accounts affects both customer types, so sign-in flow and access rules need to be tested carefully.
The third mistake is assuming all surrounding features will work the same way in B2B. Shopify lists several incompatibilities, including accelerated checkouts such as Shop Pay, Apple Pay, Google Pay, and Amazon Pay, along with local delivery, pickup points, subscriptions, legacy customer accounts, some third-party apps, and checkout customizations made in checkout.liquid. These are exactly the kinds of details that can turn a βsimpleβ B2B launch into an operational problem if they are discovered too late.