Your customer's procurement team makes joining Ariba sound like an administrative formality. What their enablement pack rarely mentions: SAP Business Network is the one major procurement network that charges suppliers, and the moment punchout and electronic orders enter the picture, those charges stop being optional. This page lays out the fee structure as published by SAP, so you can put a number in the budget before you commit to a go-live date.
Standard is free. Punchout needs Enterprise.
SAP Business Network has two supplier account types. Standard accounts are free and fine for receiving the occasional PO by email. They do not support supplier-managed catalogs, punchout, or cXML and EDI integration. The features your buyer is actually asking for when they say “punchout catalog” require an Enterprise account, and Enterprise accounts are where the fee schedule lives.
When fees trigger
Fees are assessed per buyer relationship, on a rolling twelve-month window. A relationship becomes chargeable once you cross both thresholds: five documents (POs, invoices and the like) and 50,000 USD in transacted value. Below either threshold, you owe nothing for that relationship. One detail worth knowing: once one relationship crosses into chargeable territory, your whole account is treated as chargeable, and every buyer relationship counts toward your subscription tier.
The transaction fee
The headline number is 0.155% of transacted value on the documents flowing through the network (it rises to 0.35% where service entry sheets are involved). The fee is capped at 20,000 USD per buyer relationship per year in North America. For a supplier doing, say, 2 million USD a year with one Ariba buyer, that is roughly 3,100 USD in transaction fees alone, on top of the subscription.
Subscription tiers, and the Silver surprise
Enterprise accounts pay an annual subscription based on document volume across all chargeable relationships: Standard at 0, Bronze at 50, Silver at 750, Gold at 2,250 and Platinum at 5,500 USD per year. Here is the part that catches punchout suppliers: using cXML or EDI automation moves you to the Silver tier at 750 USD per year, even at low document counts. Punchout is cXML automation by definition. A Shopify merchant going live with Ariba punchout should therefore budget a minimum of 750 USD per year in network fees, before transaction fees, and before whatever their punchout provider charges. It is SAP's fee, not your connector's, and no integration choice makes it disappear.
The calendar cost
Money is one budget line; time is the other. Real buyer enablement documentation quotes 8 to 12 weeks for a punchout catalog to go live on Ariba. Integrators advertise 2 to 4 weeks and charge 4,000 to 12,000 USD per integration for the privilege. The gap between those numbers is not engineering, it is coordination: trading relationship setup, credential exchange, catalog validation, test realm scheduling, and buyer approvals between every step. The technical work is measured in days; the email threads are measured in weeks. Anything that shortens a test loop, like raw XML logs your buyer's IT team can read without a call, pays for itself here.
Is it worth it?
Usually, yes, and the reason is simple: the buyer asking for punchout is typically one of your largest accounts, and the alternative to complying is watching their orders drift to a supplier who is wired into their system. But go in with the full number: Silver at 750 USD per year, 0.155% on transacted value, and weeks of coordination. If you have a choice of which buyer to enable first and one of them runs Coupa, start there instead: Coupa charges suppliers nothing and buyers configure punchout themselves. Then come back to Ariba with a working playbook.
Running your store on Shopify? The Ariba punchout page covers how PunchRelay handles the technical half: the cXML endpoint, contract pricing from Shopify B2B catalogs, and purchase orders that arrive as Shopify orders instead of PDFs.