International Payment Processing for U.S. Businesses
Quick answer: U.S. businesses accepting international payments need a payment gateway that supports multi-currency checkout, a merchant account that accepts cross-border transactions, and an understanding of additional fees: cross-border assessment (0.40-0.60%), currency conversion (1-3%), and international interchange rates (typically 0.20-0.40% higher than domestic).
If you sell products or services to customers outside the United States, international payment processing is not optional — it is a revenue requirement. But international transactions come with additional fees, fraud risk, and compliance considerations that domestic-only businesses don't face.
International Transaction Fees
| Fee Type | Range | Who Charges It |
|---|---|---|
| Cross-border assessment | 0.40-0.60% | Visa/Mastercard |
| Currency conversion | 1-3% | Gateway or processor |
| International interchange | 0.20-0.40% above domestic | Card-issuing bank |
| Total additional cost | ~1-4% above domestic rates | Various |
Key insight: With interchange-plus pricing, you see these fees transparently. Flat-rate processors absorb them into a single rate that you can't negotiate or optimize.
Multi-Currency Checkout
Displaying prices in the customer's local currency increases conversion rates by 10-20%. Your payment gateway should support:
- Dynamic currency conversion — prices displayed in local currency, settled in USD
- Multi-currency pricing — fixed prices set per currency for major markets
- Currency selector — let customers choose their preferred currency
Reducing International Fraud
International transactions have higher fraud rates than domestic. Protect yourself with:
- 3D Secure — required in many countries (EU's Strong Customer Authentication)
- AVS — limited effectiveness for international addresses
- Geo-location checks — flag orders where IP location doesn't match billing address
- Velocity controls — limit transactions per IP or card from high-risk countries
- Manual review — review large international orders before fulfilling
Shipping and Customs Considerations
International payment processing is only part of the equation. Shipping internationally adds:
- Customs declarations and duties
- Longer delivery times (higher chargeback risk)
- Currency fluctuation between order and delivery
- Returns logistics complexity
Display estimated delivery times and customs responsibility clearly during checkout to reduce international chargebacks.
International Payment Methods
Credit cards are not the dominant payment method everywhere:
- Europe — credit/debit cards, SEPA transfers, iDEAL (Netherlands), Bancontact (Belgium)
- Asia — Alipay, WeChat Pay, credit cards
- Latin America — Boleto (Brazil), OXXO (Mexico), credit cards
- UK/Australia — credit/debit cards, bank transfers
Supporting local payment methods increases conversion in specific markets.
Contact Unison for international payment processing setup.