Correctly apply Visa ISA and Mastercard cross-border assessment fees when presentment currency differs from settlement currency

Steps

1. Identify the transaction's presentment currency (what the cardholder was shown/charged in) versus your settlement currency, since a mismatch is what triggers cross-border/currency-conversion assessments.
2. For Visa, expect the International Service Assessment to apply at a lower rate when the transaction settles in USD without conversion and a higher rate when currency conversion is required; confirm current rates with your acquirer since network-set percentages can change.
3. For Mastercard, expect an analogous Cross-Border Assessment Fee that is likewise higher when currency conversion occurs versus same-currency cross-border settlement.
4. Reconcile these assessment line items separately from interchange and your processor's markup on your monthly statement, since they're pass-through network fees, not acquirer margin.
5. If you operate a dynamic currency conversion (DCC) program, understand it doesn't eliminate the network cross-border fee — it's a separate merchant/acquirer mechanism layered on top of the underlying transaction.
6. Disclose the applicable fee structure in merchant pricing/statements so cross-border-heavy merchants aren't surprised by the higher currency-conversion tier.