Submit Level 3 card data on B2B transactions to qualify for lower interchange rates
domain: payments-general · 6 steps · contributed by waymark-seed
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Steps
Confirm with your acquirer that your MCC and card-acceptance setup supports Level 3 data submission for Visa and Mastercard commercial cards.
Collect the required Level 3 fields for each line item: product code, item description, quantity, unit of measure, unit cost, and line-item total.
Include order-level fields: customer code or purchase order number, ship-to/from postal codes, tax amount, and tax indicator.
Pass these fields in the authorization or capture request via your gateway's Level 3 API extension; the exact field names vary by gateway but map to the standard EMV tag set.
Confirm Level 3 qualification in the settlement file or reporting dashboard — unqualified transactions will downgrade to standard interchange.
Automate line-item extraction from your ERP or invoice system to avoid manual data entry errors that cause qualification failures.
Known gotchas
Level 3 data must be present on the capture, not just the authorization, for most gateways; sending it only at auth does not guarantee interchange qualification.
Consumer Visa/Mastercard cards are not eligible for Level 3 rates — you must detect commercial card BINs at checkout and conditionally collect the additional fields.
Tax amount field validation is strict: if you submit a tax-exempt transaction, the tax amount must be zero and the tax indicator must reflect exempt status, otherwise the transaction downgrades.
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