Install App 
ClaudeInventory your requirements
Record CMS needs, product options, recurring purchases, shipping regions and the required payment provider.
Collect current prices
Use the official Webflow, Penni Cart and payment-provider pricing pages. Record the date and billing currency.
Estimate total cost
Calculate fixed subscriptions plus expected processing costs, then compare functionality and maintenance effort.
Start with the complete monthly cost
The cost of a store includes more than a website plan. List hosting, commerce software, payment processing, optional apps and the time spent maintaining the setup. A low subscription price can be misleading when essential functionality requires additional paid tools. Use your actual requirements and expected order volume, not a generic example.
Compare native Webflow and an external commerce setup
For native Webflow Ecommerce, consult the current ecommerce plans and their limits. For an external integration, verify the Webflow site plan required for your design and CMS usage, then add the integration’s price. Do not assume that every external integration requires a native ecommerce plan or that every CMS plan is sufficient for every project.
Model payment and operational costs
Payment providers can charge processing fees and have different availability by country. Refunds, currency conversion, disputes and international cards may add costs. Compare the provider’s current terms for your business location.
Also account for subscriptions, shipping labels, tax tools and integrations when your store uses them. Separate required launch costs from optional tools you can introduce later.
Use a like-for-like decision sheet
Write down expected products, monthly orders, average order value, subscription requirements and the checkout changes you need. Compare two setups against those same inputs. Confirm published prices immediately before purchasing; plan names, fees and limits can change, and this guide deliberately avoids quoting prices that may become outdated.