Money exchange for Hong Kong eCommerce: How to cut FX costs

Key takeaways

• Depending on the provider and account setup, a payment gateway may apply an FX markup or currency conversion fee when converting foreign-currency sales into HKD for settlement or payout.

• Like-for-like settlement helps businesses avoid unnecessary conversions.

• Airwallex Checkout, a payment gateway, together with its Global Accounts, lets eligible businesses accept global payments and settle funds in matching currencies.

Managing money exchange for Hong Kong eCommerce operations requires more than comparing card processing fees. The payment gateway also determines how customers pay, how funds are settled, and whether foreign revenue is converted before you need to use it.

This guide explains how Stripe, PayPal, and Shopify Payments can create additional FX costs, how double currency conversion occurs, and how a payment gateway such as Airwallex’s payment gateway can help businesses manage cross-border payment flows more efficiently.

Payment gateway pricing: Stripe, PayPal, and Shopify Payments comparisons

Payment gateway pricing can look straightforward until you add up the fees across checkout, settlement, and payout. Start by separating the visible transaction rate from the FX charges that may appear later.

What payment gateway fees can include

The card processing rate is only one part of the cost. Depending on the provider and account setup, you may also pay a fixed transaction fee, an FX conversion charge, or a foreign-currency settlement fee.

The table below gives a high-level comparison. Treat it as a starting point rather than a final quote, as rates can vary by payment method, customer location, settlement currency, and commercial terms.

The key difference is not just the headline card rate. Check whether the provider converts your money before payout, what it charges for that conversion, and whether you can receive funds in the currency your business actually needs.

Where hidden conversion costs appear

A payment gateway can convert money at checkout, during settlement, or when it pays out to your account. You might not see each cost as a separate line item, but the effect is the same: Less revenue reaches your business account.

It helps to look at three currencies in the payment flow:

• Customer-facing currency: The currency shown and charged at checkout.

• Settlement currency: The currency the payment gateway uses to pay you.

• Operating currency: The currency you use for suppliers, advertising, software, payroll, or other expenses.

When the settlement and operating currencies match, you can avoid converting money simply because of the payment gateway’s default settings.

Airwallex’s payment gateway stands out by linking local-currency checkout with like-for-like settlement. Eligible businesses can accept a customer’s payment in the currency they used and settle the funds in that same currency, rather than automatically converting everything into HKD. You convert only when you actually need a different currency.

Double currency conversion: How it affects Hong Kong eCommerce margins

The cost of double conversion becomes clearer when you follow one overseas sale from checkout to supplier payment.

What happens when a USD sale is automatically converted into HKD

Double currency conversion is easy to miss because each individual charge may look small. The cost becomes more noticeable when it happens across hundreds or thousands of overseas orders.

Here is a simplified example of how the loss can occur:

1. A customer pays US$100.

2. The payment gateway converts the payment into HKD before settlement.

3. After the first FX spread, the merchant receives approximately HK$780.

4. The merchant later converts the HKD back into USD to pay an overseas supplier.

5. After the second FX spread, the merchant receives approximately US$97.

The exact figures will change with the exchange rate, fees, and timing. The important point is that the payment gateway converted the revenue before the business needed to use it.

How like-for-like settlement helps

Like-for-like settlement means receiving an eligible payment in the currency the customer used. A USD payment can settle as USD instead of being converted automatically into HKD. That gives you more control over your cash flow. You can use the USD balance to pay a US supplier, cover a software subscription, or fund another overseas expense without converting the money into HKD first.

With Airwallex, eligible businesses can present prices in local currencies, accept relevant payment methods, and settle funds into matching currency balances. FX conversion may still be necessary when the payment currency and expense currency do not match, but you are less likely to convert money simply because of a default payout setting.

Local-currency pricing: Should you charge customers in local currency?

The best checkout currency for your customer is not always the best settlement currency for your business. The next step is to balance a familiar payment experience with the cost of converting and using those funds.

How customer experience and merchant costs fit together

Local-currency pricing can make checkout easier for international customers. They see a familiar price and can choose a payment method they recognise, which may help reduce hesitation before payment. But displaying a local currency does not guarantee that you will receive that currency. Your payment gateway may still convert the funds into a default settlement currency after checkout.

A practical strategy is to separate the customer experience from your internal cash management:

• Show prices in the currencies your customers are most likely to use.

• Accept the payment methods that matter in each market.

• Settle eligible proceeds in their original currencies.

• Convert funds only when you need a different currency for an actual business expense.

How to set up localised pricing without paying unnecessary FX costs

Start with the checkout experience, then work backwards through settlement and payouts. The following steps can help:

1. Enable multi-currency pricing on your eCommerce website.

2. Choose a payment gateway that supports the currencies and payment methods your customers use.

3. Check which currencies can settle like-for-like.

4. Match your settlement currencies with your main supplier and operating expenses.

This way, localised pricing improves the customer experience without automatically creating more work or more FX costs for your finance team.

Refunds and FX losses: What Hong Kong merchants should know

Refunds add another layer to cross-border payment costs. Exchange rates can move after the original payment, so the amount returned may not match the original settlement.

Who absorbs the exchange-rate difference?

Refunds are where your FX setup meets the payment gateway’s terms. The provider may keep the original processing fee, while exchange-rate movements between the sale and the refund can change how much the refund costs your business.

If the payment gateway converts the refund into the customer’s currency at a different rate, your business may absorb the difference. This is why refund costs deserve a place in any payment gateway comparison, especially if your business sells higher-value products or has frequent returns.

Can you recover the original FX charge?

Usually, you should not assume that every processing or conversion fee will be returned. The answer depends on the provider, payment method, account terms, and refund timing.

Managing native multi-currency balances can reduce the need for another conversion during a refund. It does not override the payment gateway’s refund policy, so check the current terms before building your pricing model around a full fee refund.

Connecting Airwallex Global Accounts to Stripe, PayPal, or Shopify Payments

If you already use Stripe, PayPal, or Shopify Payments, connecting an Airwallex Global Account can give you more control over how foreign-currency payouts reach your business.

Why connect a Global Account to your payment provider?

Some payment providers automatically convert foreign-currency sales into HKD before sending a payout. If you later need USD, EUR, or GBP to pay an overseas supplier, you may have to convert the funds again.

By connecting a matching-currency Global Account, you may be able to receive supported payouts in their original currency. This can help you avoid unnecessary conversions and use the funds directly for expenses in the same currency.

How to connect your Global Account

1. Log in to your Airwallex WebApp and open Global Accounts.

2. Select the currency you want to receive, such as USD, EUR, or GBP, then copy the relevant local account details.

3. Open the payout settings in Stripe, PayPal, or Shopify Payments.

4. Add the Airwallex account details as the payout destination for the matching currency.

5. Confirm the payout currency, review the provider’s eligibility requirements and fees, and monitor the first payout.

Payout availability depends on the provider, currency, merchant location, and account eligibility. Confirm that the provider supports the selected payout currency before making the change.

How to choose a payment gateway for your Hong Kong eCommerce business

If you do not have a payment gateway yet, compare the full payment flow rather than a single advertised rate. The right provider should support how your customers pay, how you want funds settled, and how you manage overseas expenses. For a Hong Kong business, money exchange should be part of that comparison from day one.

Compare the full cost, not just the card rate

The cheapest payment gateway is not always the one with the lowest advertised processing fee. Look at the full payment flow instead:

• Base card processing: The fee charged when a customer completes a transaction.

• Fixed transaction fees: A fixed amount that can have a bigger effect on lower-value orders.

• FX markups: Charges added when the payment gateway converts the transaction or payout currency.

• Settlement fees: Charges that may apply when funds are paid out in a foreign currency.

• Transfer fees: Charges for sending funds to an overseas recipient.

• Refund and dispute fees: Costs that may still apply after a refund or chargeback.

A payment gateway that supports like-for-like settlement can reduce unnecessary conversions, but you should still compare payment-method fees, supported currencies, settlement rules, and refund terms.

Why Airwallex’s payment gateway can help reduce FX costs

Your payment gateway should do more than take a payment. It should also help you decide how customers pay, how funds are settled, and when you convert currencies.

With Airwallex’s payment gateway, you can:

• Present prices in the customer’s preferred currency where supported.

• Accept local and global payment methods through one integration.

• Settle eligible proceeds into matching currency balances.

• Keep the original currency for relevant supplier payments and business expenses.

• Convert money only when you need a different currency.

The connected Airwallex Business Account provides a unified financial and payment platform for managing multi-currency balances and transfers. There is no account opening fees or minimum balance requirement.

The potential saving depends on your payment methods, currencies, sales volume, settlement eligibility, and current pricing. The practical benefit is simpler: You have more control over where your money goes and when it is converted.

Frequently asked questions

What is the average money exchange fee for Hong Kong payment gateways?

There is no single market-wide rate. Stripe currently lists a 2% charge when currency conversion is required, while PayPal lists 3% above the base rate for converting balances and payments and 4% in other conversion cases.

Other providers use different pricing models. Check the current fee schedule for your account, payment methods, and settlement currencies before comparing costs.

How can I avoid double currency conversion when receiving USD in Hong Kong?

Use a payment gateway that supports USD acceptance and eligible like-for-like USD settlement. For example, with Airwallex, when you receive USD payouts from another payment provider, route them to the matching Global Account and use the funds for USD expenses where possible.

Does Stripe or PayPal refund the original money exchange fee?

Do not assume that the original processing or FX fees will be fully returned. The outcome depends on the provider’s refund policy, payment method, account terms, and exchange rate at the time of the refund.

Should I use Airwallex’s payment gateway or only a Global Account?

They solve different parts of the payment flow. Airwallex’s payment gateway is for accepting customer payments and managing checkout and settlement. Global Accounts are useful for receiving payouts from Stripe, PayPal, Shopify Payments, or another payment provider, as well as receiving payments from another business via bank transfer.

Businesses using Airwallex’s payment gateway can also use the connected Business Account to manage multi-currency balances and transfers in one place.

What is like-for-like currency settlement?

Like-for-like settlement means receiving a payout in the same currency as the customer’s payment, such as receiving USD for a USD transaction. This can prevent an automatic conversion into HKD and a second conversion when the business later needs USD.

Sources

Information was sourced as of August 2026 for reference purposes. For the latest details, please visit each provider’s official website.

• https://stripe.com/hk/pricing

• https://www.paypal.com/hk/webapps/mpp/merchant-fees

• https://help.shopify.com/en/manual/intro-to-shopify/initial-setup/sell-in-china/set_up_payments

• https://help.shopify.com/en/manual/payments/shopify-payments/supported-countries/hong-kong/payouts

• https://help.shopify.com/en/manual/payments/shopify-payments/store-currency/payouts-in-multiple-currencies

Disclaimer: This article was prepared in August 2026 based on voluntary online research and publicly available information. We have not personally tested every tool or provider mentioned. This article is for educational purposes only, and readers should independently evaluate each service provider based on their specific business requirements. Content is updated every six months. To request an update, please contact us at [email protected].