Key Takeaways
- B2B transactions can qualify for lower Level 2/Level 3 interchange rates
- Most B2B merchants are never configured to capture that data
- Larger tickets and invoicing change the optimal setup
- Card-not-present and ACH options matter more in B2B
- The right configuration can meaningfully cut effective rate
B2B and B2C look similar on the surface — both end with a card being charged. The economics underneath are not similar at all, and most B2B merchants are paying B2C rates because nobody configured their account to do anything else.
What's actually different
- Ticket size — commercial transactions are typically larger
- Payment method mix — commercial and purchasing cards, ACH, and invoicing all matter
- Buyer behavior — invoiced terms, PO numbers, approval workflows
- Card-not-present share — most B2B happens over phone, email, or portal
Level 2 and Level 3 — the money point
When a corporate or purchasing card is used, Visa and Mastercard offer lower interchange categories — Level 2 and Level 3 — to merchants who pass additional transaction data with the charge. Level 2 typically needs sales tax and a customer code. Level 3 needs line-item detail (description, quantity, unit price, etc.). The rates are meaningfully lower than retail consumer-card interchange.
Pass more data with each commercial-card transaction, qualify for lower interchange rates. The savings only happen if your account and gateway are actually configured to send the data — most aren't.
Why most B2B merchants miss it
Two reasons. First, the merchant has to be set up to accept commercial cards at Level 2/3 rates — and that requires a gateway or virtual terminal that supports the data fields. Second, somebody has to actually configure it. A lot of B2B accounts get boarded as generic retail and never touched again. The merchant pays consumer rates on commercial card volume for years and never knows.
ACH and card-not-present
B2B also leans heavier on ACH. For large invoices, ACH is dramatically cheaper than card and clears in 1–2 business days. A healthy B2B payment stack mixes card (for speed and rewards-driven buyers), ACH (for large invoices), and a card-not-present setup that handles phone, email, and portal orders without forcing the buyer through a clunky checkout.
How to find out if you're leaving money on the table
Pull your last statement. Look at the interchange categories. If you see commercial or corporate card volume hitting standard interchange categories instead of Level 2/Level 3 categories, you're overpaying. A statement review with real numbers can identify the gap in a few minutes. That's a free conversation — bring the statement and we'll show you the math.
Elliott runs Bonita Payments from New Orleans. He writes General Quarters to share the playbook most ISOs would rather their agents and merchants never see — pricing math, residual structure, and what actually separates a partner from a vendor.