Shopify Payments processing and conversion fees
Selling in multiple currencies is being released gradually. A notification will appear in your Shopify admin when your store can start to use this new feature.
When you sell in multiple currencies you're charged the regular Shopify Payments processing fee and a currency conversion fee.
You can find the fee values in your Terms of Service.
Shopify Payments fee
When you capture the payment for an order, you're charged a Shopify Payments fee to cover the cost of processing the payment. This fee depends on the type of credit card that is used (for example, the fee for a VISA card can sometimes be different from the fee for an American Express card) and the location where the credit card is registered:
Payment processing fees (Domestic) - The cost to process credit cards that are registered in the same country as your store.
Payment processing fees (Cross border) - The cost to process credit cards that are registered in a country that is different from your store's country.
When you use Shopify Payments, you aren't charged a transaction fee. If you deactivate Shopify Payments and enable an external payment provider, then you're charged a transaction fee for your orders going forward. This transaction fee is determined by your Shopify plan.
Conversion rate and fee
When you accept payment in a currency that is different from your payout currency, then a currency conversion occurs. The amount that you receive in your customer's local currency (also referred to as the presentment currency) is converted to your payout currency, and you're charged a currency conversion fee:
Currency conversion rate - The market rate at which one currency is exchanged for another. The conversion rate is not a fee (it's a mid-market rate, without any markup). For example, a conversion rate of USD/EUR
0.8788means that $1 USD is exchanged for €0.87 EUR.
Currency conversion fee - The fee that Shopify charges to convert currencies. This fee is charged when you capture payment. It's not charged when you issue a refund or when you receive a chargeback.