What payment acquirers do across borders and currencies

A payment acquirer is the bank or processor that sits between a merchant and the payment networks (Visa, Mastercard, etc.). When you sell to customers in different countries or accept payments in different currencies, the acquirer handles the conversion, routing, and settlement—which means they figure out what the money is worth, send it through the right banking channels, and make sure you get paid in your home currency.

The acquirer does not just flip a switch and make this work. They maintain relationships with banks in multiple countries, hold accounts in different currencies, and use real-time exchange rates to convert funds. They also manage the rules that differ by region: what payment methods are legal in Germany, what fraud checks are required in Japan, what documentation a merchant in Brazil needs to provide. Without an acquirer managing these layers, a small business in Portland could not easily sell to a customer in Singapore.

Key Takeaways

  • Payment acquirers maintain bank accounts and partnerships in multiple countries so they can accept payments in local currencies and settle funds to merchants in their home currency.
  • Exchange rates are locked at the moment the transaction is authorized, not when the customer's bank processes it days later, which protects both the merchant and the acquirer from currency swings.
  • Different regions have different rules: some countries require stronger fraud checks, others limit which payment methods can be used, and some have caps on transaction sizes or require additional customer verification.
  • Acquirers charge different fees for cross-border transactions than domestic ones, and the fee structure varies by the countries involved and the payment method used.
  • Settlement timelines vary by country and can take 3 to 7 business days, which means a merchant may not see funds for a week even after a customer's payment is confirmed.

How acquirers hold accounts in multiple currencies

An acquirer does not convert every transaction through a single global account. Instead, they hold nostro accounts—bank accounts in foreign countries, denominated in local currency. A large acquirer might hold accounts in 50 or 100 countries. When a customer in the UK pays in British pounds, the acquirer's UK bank account receives those pounds. When a customer in Mexico pays in pesos, the acquirer's Mexico account receives pesos.

This setup lets the acquirer batch transactions by country and currency, which reduces the number of conversions needed and lowers the cost of moving money across borders. Instead of converting each transaction individually (expensive), they accumulate pounds in the UK account, pesos in the Mexico account, and so on. Then, once or twice a day, they convert the total balance in each currency to the merchant's home currency and settle it.

The acquirer pays for these accounts and the banking relationships that come with them. Larger acquirers can negotiate better rates because they move more volume through each account. Smaller acquirers may partner with other processors or use a payment facilitator (PayFac) to access multi-currency infrastructure without building it themselves.

Exchange rates and when they are locked

The exchange rate matters because it determines how much money the merchant actually receives. If a customer in Japan pays 10,000 yen, the acquirer needs to know what that is worth in dollars (or euros, or pounds, depending on the merchant's home currency). The rate changes every second in the forex market, so timing is critical.

Most acquirers lock the exchange rate at the moment the transaction is authorized—when the customer's card is approved and the payment is confirmed. This is not when the customer's bank processes the charge (that happens 1 to 3 days later) and not when the merchant receives the funds (that can take 3 to 7 more days). The acquirer locks the rate early to protect themselves and the merchant from currency swings during the settlement window.

Some acquirers offer a forward contract or rate lock for large transactions, where the merchant can lock in a rate hours or days in advance. This is rare for small payments but common for invoices or subscription renewals where the amount is known ahead of time. The acquirer charges a small fee for this service because they are taking on the risk that the rate moves against them.

Regional rules and payment method restrictions

Each country has its own banking regulations, and acquirers must follow them. Some regions require stronger Know Your Customer (KYC) checks—meaning the acquirer has to verify the merchant's identity and business more thoroughly before processing cross-border payments. Others have limits on how much a single transaction can be, or require the customer to verify their identity with a second factor (like a one-time code) before the payment goes through.

Payment methods also vary by region. Credit cards are standard in North America and Western Europe, but in parts of Asia and Latin America, bank transfers and digital wallets are more common. An acquirer operating in Brazil needs to support Pix (a real-time bank transfer system), not just Visa. An acquirer in India needs to handle UPI (Unified Payments Interface). If a merchant wants to accept payments in these regions, the acquirer has to have built integrations with these local systems.

Some countries restrict which merchants can accept cross-border payments. High-risk industries—gambling, adult content, cryptocurrency—face stricter rules and higher fees, or may be blocked entirely in certain regions. An acquirer has to know these restrictions and enforce them, which means they may decline to process a transaction even if the customer's bank would approve it.

How acquirers price cross-border transactions

Cross-border transactions cost more than domestic ones. A merchant processing a payment within the US might pay 2.9% + $0.30 per transaction. The same merchant processing a payment from Japan might pay 3.5% + $0.30, or even higher depending on the acquirer and the countries involved.

The acquirer's costs are higher because they have to maintain accounts in multiple countries, manage currency conversion, comply with local regulations, and absorb the risk that a customer disputes the charge or that a payment fails partway through settlement. They also pay interchange fees to the customer's bank, and these fees are higher for cross-border transactions.

Some acquirers charge a separate cross-border fee on top of the percentage and per-transaction fee. Others bundle it into a higher percentage rate. A few offer tiered pricing: the more volume a merchant processes in a region, the lower the rate. It is worth asking an acquirer for their full fee schedule broken down by country pair (US to UK, US to Japan, etc.) before signing up, because the difference can be significant for high-volume merchants.

Settlement timelines and when merchants get paid

Settlement is the process of moving money from the acquirer's account to the merchant's account. Domestic settlements in the US typically take 1 to 2 business days. Cross-border settlements take longer because the money has to move through multiple banking systems and may need to be converted.

A typical cross-border timeline looks like this: a customer pays on Monday at 2 PM. The acquirer authorizes the payment and locks the exchange rate. The customer's bank processes the charge on Tuesday or Wednesday. The acquirer's local bank account (in the customer's country) receives the funds on Wednesday or Thursday. The acquirer converts the funds to the merchant's home currency and initiates a transfer to the merchant's bank on Thursday. The merchant's bank receives the transfer on Friday or Monday, depending on weekends and holidays.

Some countries have slower banking infrastructure, and settlements can take 5 to 7 business days. Others, like those in the EU, have faster systems and may settle in 2 to 3 days. The acquirer should tell you the expected settlement timeline for each country they support. If they do not, ask—it affects your cash flow.

Fraud detection and compliance across regions

Fraud looks different in different regions. In the US, card-not-present fraud (online purchases) is common. In Europe, 3D Secure (a two-factor authentication system) is mandatory for many transactions, which reduces fraud but adds a step for customers. In Asia, mobile wallets and bank transfers are more common than cards, so the fraud patterns are different.

Acquirers use machine learning models trained on transaction data from each region to spot suspicious activity. A transaction that looks normal in one country might be flagged in another. For example, a large purchase from a new customer in a high-risk country might trigger extra verification, while the same purchase from a regular customer in a low-risk country might go through instantly.

Acquirers also have to comply with sanctions lists and anti-money-laundering (AML) rules that vary by country. If a customer is on a US sanctions list, the acquirer cannot process their payment, even if the merchant is in another country. This is a legal requirement, not a choice, and acquirers have to check every cross-border transaction against these lists.

How merchants choose an acquirer for multi-region sales

If you sell to customers in multiple countries, you need an acquirer that supports those specific countries and currencies. A small acquirer might support 20 countries; a large one might support 150+. Before signing up, check their list of supported countries and payment methods. If your target market is not on the list, they cannot help you.

Ask about settlement currency options. Some acquirers will settle to you in your home currency only. Others let you hold balances in multiple currencies and convert them yourself, which can save money if you plan to spend money in those countries (paying suppliers, for example). Ask about the exchange rate markup—acquirers typically mark up the mid-market rate by 1% to 3%, and this markup is where they make money on currency conversion.

For high-volume merchants, negotiate the fee structure. Acquirers have more flexibility than they advertise, especially if you are processing millions of dollars per year across multiple regions. Get a proposal in writing that breaks down fees by country, payment method, and transaction size. Compare proposals from at least two acquirers before deciding.

Frequently Asked Questions

What happens if the exchange rate moves between when I authorize a payment and when I receive the settlement?

The acquirer locks the rate at authorization, so you are protected from rate swings. If the rate moves in your favor, you do not benefit—the acquirer keeps the difference. If it moves against you, you do not lose—the acquirer absorbs it. This is why acquirers charge a markup on the exchange rate; they are pricing in the risk of holding the currency until settlement.

Can I accept payments in a currency my acquirer does not support?

No. If your acquirer does not have an account in that country or does not support that currency, they cannot process the payment. You would need to switch to an acquirer that does, or use a separate payment processor for that region. Some merchants use multiple acquirers for different regions to get better rates or support for local payment methods.

Why do cross-border payments take so long to settle?

Money has to move through multiple banking systems in different countries, each with its own processing times. The acquirer's local bank has to receive the funds, the acquirer has to convert the currency, and your bank has to receive and process the incoming transfer. Weekends and holidays add delays. Some countries have slower banking infrastructure than others, which is why settlement times vary by country pair.

Do I have to pay different fees for each country I sell to?

Usually yes. Acquirers charge different rates for different country pairs because the costs and risks are different. A transaction from the US to Canada might cost 2.9%, while a transaction from the US to Nigeria might cost 4.5%. Ask your acquirer for a full fee schedule broken down by country before you sign up.

What if a customer disputes a cross-border charge?

The dispute process is the same as for domestic transactions, but it takes longer because the money has to move back through multiple banking systems. The acquirer will debit your account for the disputed amount while they investigate. If the customer wins the dispute, you lose the money and the goods or services. If you win, the money is returned to your account, but this can take 30 to 90 days depending on the countries involved.