Hong Kong Cross-border trade: Overseas & mainland China transfers

Key takeaways

• Cross-border trade is buying and selling across countries, involving different currencies, regulations, and payment systems.

• For Hong Kong businesses, the main hurdles are FX costs, choosing payment tools, and collecting from overseas customers without forced currency conversion.

• Airwallex lets Hong Kong businesses collect in 130+ currencies, convert currencies at interbank FX rates, and manage cross-border cash flow from a single account.

eCommerce is gaining rapid momentum in Hong Kong. However, due to the complications of cross-border logistics and international customs clearance procedures, many eCommerce businesses can only stay local. Today, with financial technology, and cross-border eCommerce reaching a level of maturity, it’s time for your eCommerce business to expand globally.

This guide walks through what cross-border trade is, and what Hong Kong businesses should think about when choosing payment tools. We'll also cover the specific tools available for trading with mainland China and overseas markets.

What is cross-border eCommerce?

Cross-border eCommerce is one type of cross border trade. Simply put, it’s a form of online shop, where product display, order placement, payment, and customer service all happen online. The difference is that the buyer and seller are in different countries or regions, involving various currencies, tariffs, and export procedures. Cross-border transactions and logistics are inevitable challenges, as most eCommerce businesses do not have overseas warehouses, 

Challenges of cross-border trade

Cross-border trade comes with friction. Before getting into payment tools, it's worth being clear about the challenges Hong Kong businesses face:

FX costs and currency conversion

Every time you convert currency, you pay a spread above the interbank rate. Traditional banks and some payment platforms add a markup that compounds across lots of transactions. So if a Hong Kong importer pays a supplier in a foreign currency through a traditional bank, that usually means a markup on the exchange rate plus a transfer fee on every single payment. The more transactions you process, the more that cost adds up.

Customs, tariffs, and regulatory compliance

Cross-border trade also means customs declarations, import duties, and compliance with the destination country's regulations. For eCommerce sellers, that means knowing what documents are required, what tariffs apply, and how to handle returns across borders. The complexity changes depending on the market and product category, so businesses should get specialist advice for their specific trade corridors.

Collecting payments from international customers

Collecting money from buyers in other countries is more complicated than taking domestic payments. Buyers in different markets expect to pay in their local currency and use local payment methods. If an overseas buyer only sees HKD at checkout, with no option to pay using their preferred local method, they're more likely to abandon the purchase. Without the right setup, you can lose sales simply because the checkout experience doesn't line up with what overseas buyers expect.

Mainland China cross-border transaction tools: WeChat Pay vs. Alipay

WeChat Pay and AliPay are the two most popular payment tools in mainland China. They each have launched a Hong Kong version to facilitate cross-border payments.

The major difference between the two is that WeChat Pay is a function within the WeChat app, which also doubles as an instant messaging application used by most people in China; Alipay is solely a payment tool.

Because of this fundamental difference, generally speaking, WeChat Pay is mainly used for daily consumption, such as grocery shopping and dining, whereas Alipay is mostly used for cross-border online shopping. 

That said, for cross-border eCommerce owners, it’s best to sign up for both WeChat Pay and Alipay accounts to tap into the vast market.

Overseas cross-border transaction tools comparison: PayPal vs Wise vs Airwallex

If you need to pay overseas suppliers or collect from international customers, the tool you choose will directly affect total cost and settlement speed. When comparing options, looking only at headline fees isn’t enough. FX spreads and intermediary bank fees can be just as significant, and are often the easiest to overlook.

The hidden costs: FX spread and intermediary bank fees

• Transfer fees: The platform or bank’s stated fee, which is usually disclosed upfront.

• FX spread: Most banks and platforms add a markup above the interbank or mid-market rate when converting currency. This is frequently the largest invisible cost, and not every provider discloses it clearly.

• Intermediary bank fees: If you send funds via SWIFT, payments may pass through multiple correspondent banks, each deducting a fee. The recipient can end up receiving less than you sent.

Evaluate all three to make an accurate, like-for-like comparison across tools.

As the table shows, fee structures and settlement speeds vary widely. For businesses that frequently send and receive cross-border payments, choosing a platform with transparent FX and fast settlement can yield meaningful savings over time.

Airwallex

If you regularly pay suppliers in multiple countries or collect from overseas customers in different currencies, an Airwallex Business Account brings payment acceptance, FX, and payouts into a single platform, which is typically faster and more transparent than traditional banks.

• FX and fees: FX from as low as interbank +0.2%. No transfer fee on payments sent via local rails, helping reduce intermediary bank charges and FX slippage.

• Speed: 93% of transfers arrive the same day; local networks are typically faster than SWIFT.

• Coverage: Support for 90+ currencies and payouts to 200+ countries and regions.

• Multi-currency collection: Global Accounts provide local account details in multiple markets so customers can pay in their local currency, avoiding forced conversion and simplifying reconciliation.

• Online payment acceptance: Connect to eCommerce platforms and offer 160+ local payment methods globally, including cards, Apple Pay, Google Pay, and Alipay.

Compared to PayPal and Wise, Airwallex offers stronger transparency, faster settlement, and enterprise-grade multi-currency features, which is well suited for Hong Kong businesses managing frequent B2B cross-border payments.

PayPal

PayPal has a low barrier to entry and enables a range of online payment options including cards. However, commercial transaction fees, fixed charges, and FX markups can elevate the true cost. As transaction values increase, the offer can become less favourable, making PayPal more suited to low volume B2C sales.

Wise

Wise offers the mid‑market exchange rate, multi‑currency accounts, and local collection details to support cross‑border transfers. The trade‑offs are that there’s no native online acquiring or payment gateway for front‑end checkout, and enterprise features such as multi‑level approvals, bulk payouts, role‑based controls, and reconciliation automation, are relatively limited.

How Airwallex supports cross-border trade

If you're managing cross-border payments from Hong Kong, the main hurdles to overcome are FX markups and overseas customer payment collection frictions. Airwallex is built to address both.

Collecting payments globally

With Airwallex Global Accounts, Hong Kong eCommerce businesses can open accounts with local bank details in 20+ currencies. Your overseas customers can pay in their own currency using their preferred local payment method, and the funds arrive through like-for-like settlement, without forced conversion.

Paying overseas suppliers

Airwallex lets businesses pay suppliers in 200+ countries at interbank FX rates, with the majority of transfers arriving the same day or faster through local payment rails rather than SWIFT. The FX markup starts from 0.2% above the interbank rate

Sign up today to see how it works for your business.

FAQs

Can I use a Hong Kong offshore business account for cross-border payments?

Yes. In fact, if the transaction volume or amount is large, using a Hong Kong offshore business account for cross-border transactions is a wiser option, as you can bypass the transaction limits imposed by cross-border payment platforms. However, the downside is that you will need to bear the hefty transaction fees and long processing time. For most Hong Kong SMEs, a multi-currency account with local payment rails will be more practical and cost-effective.

Which cross-border transaction tool is most cost-effective?

It depends on your specific use case, whether you're collecting from customers, paying suppliers, or doing both. For Hong Kong businesses that need both across multiple currencies, Airwallex offers a single platform that handles collection in 20+ currencies, FX conversion at interbank rates, and payouts to 200+ countries. The mix of transparent pricing and local payment rails typically makes it more cost-effective than using separate tools for each function.

Sources:

Information was retrieved as of April 2025 and updated in August 2026, from the sources below. Information provided is for reference only. Please refer to the official websites for the most up-to-date details

1. https://pay.wechat.com/en/index.shtml 

2. https://www.alipayhk.com/en/faq-shoppers/making-payment-bill-payment/ 

3. https://www.alipayhk.com/en/faq-shoppers/top-up/  

4. https://www.paypal.com/hk/webapps/mpp/merchant-fees?locale.x=en_HK 

5. https://www.westernunion.com/hk/en/frequently-asked-questions.html 

Disclaimer: The information was based on our own online research and we were not able to manually test each tool or provider. The information is provided for educational purposes only and a reader should consider the specific requirements of their business when evaluating providers. This research is reviewed every 6 months. If you would like to request an update, feel free to contact us at [email protected].