Updated 30 September 2026 · LocalKey consultant team
Short answer
Hong Kong SAR, Macau SAR, and mainland China operate three distinct legal tender currencies: the Hong Kong dollar (HKD) in Hong Kong SAR, the pataca (MOP) in Macau SAR, and the renminbi (RMB) across the mainland. Crossing between them involves separate immigration boundaries and customs checkpoints within China, each with its own cash declaration rules. When traveling through the Greater Bay Area, the cluster of Hong Kong SAR, Macau SAR, Guangzhou, Shenzhen, Zhuhai and Foshan, plan on using bank cards and local cash in Hong Kong and Macau, and mobile payment apps on the mainland. For official statutory frameworks, consult the Hong Kong Monetary Authority currency guide.
The three currencies and where each is legal tender
Hong Kong SAR and Macau SAR maintain separate legal, financial, and border systems under the Basic Law frameworks. They are Special Administrative Regions within China, not separate countries, and their monetary systems operate independently of mainland China and of each other.
| Currency | Jurisdiction where it is legal tender | Practical note for travellers |
|---|---|---|
| Hong Kong Dollar (HKD) | Hong Kong SAR | Regulated by the Hong Kong Monetary Authority (HKMA); linked to the US dollar under the Linked Exchange Rate System. Standard currency across Hong Kong; widely accepted on commercial terms in Macau. |
| Macau Pataca (MOP) | Macau SAR | Regulated by the Monetary Authority of Macao (AMCM). Sole statutory currency of Macau. Not accepted in Hong Kong or on the mainland. |
| Renminbi (RMB) | Mainland China | Issued by the People's Bank of China (PBOC) under the Renminbi Administration Regulation. Sole statutory currency of the mainland. By regulation, commercial entities cannot refuse RMB cash. |
Hong Kong Dollar (HKD)
The Hong Kong dollar is the legal tender of Hong Kong SAR. Banknotes are issued by three commercial note-issuing banks under authority from the HKMA, alongside government-issued ten-dollar notes and coins. Under Hong Kong's Linked Exchange Rate System, the Hong Kong dollar is linked to the US dollar, backed by US dollar reserves held in the Exchange Fund.
For destination planning, see our Hong Kong destination guide.
Macau Pataca (MOP)
The pataca is the legal tender of Macau SAR. Regulated by the Monetary Authority of Macao, banknotes are issued under government authority by agent banks. Statutory rules and coin specifications appear on the AMCM currency in circulation portal. Although indirectly tied to the US dollar via a statutory peg to the Hong Kong dollar, the pataca remains an independent currency unit.
For destination planning, see our Macau destination guide.
Renminbi (RMB)
The renminbi, with the yuan as its principal unit, is the legal tender across mainland China. It is administered by the People's Bank of China under the Renminbi Administration Regulation. Article 3 specifies that public and private payments within the mainland may be settled in renminbi, and no entity or person may refuse RMB cash. While mobile wallets handle daily consumer payments across mainland cities, physical RMB banknotes maintain legal backing everywhere.
Can you use HKD in Macau? MOP in Hong Kong? HKD on the mainland?
Cross-boundary commercial habits have developed alongside the formal laws across the Pearl River estuary. Travelers should understand the boundary between statutory legal tender obligations and informal merchant convenience.
HKD in Macau
The Hong Kong dollar is not legal tender in Macau SAR. However, almost all hotels, restaurants, retail shops, supermarkets, and taxis in Macau accept HKD cash freely as a standard commercial practice:
- Merchants generally accept HKD cash at a one-to-one ratio with the pataca for everyday transactions.
- Acceptance remains a commercial choice; merchants set their own terms and may decline foreign notes.
- Change is almost universally returned in Macau patacas (MOP) rather than Hong Kong dollars.
- Paying small purchases with large HKD notes leaves you with MOP coins and notes that cannot be spent after leaving Macau.
MOP in Hong Kong
Macau patacas are not legal tender in Hong Kong SAR, and there is no commercial acceptance of MOP in Hong Kong. Retailers, restaurants, MTR stations, and taxis across Hong Kong decline MOP banknotes and coins. Spend patacas before departing Macau or convert them into HKD at a licensed exchange counter in Macau before crossing the border.
HKD on the mainland
The Hong Kong dollar is not legal tender on the mainland. While a few transport desks or duty-free outlets inside border clearance plazas in Shenzhen may accept HKD cash on discretionary terms, HKD is unusable once you clear customs into Shenzhen or Guangzhou. You cannot use HKD for mainland taxis, high-speed rail tickets, metro rides, restaurants, or shops. Plan to use RMB-denominated mobile payment apps alongside a modest reserve of physical RMB cash.
Local digital wallets
Local stored-value tools exist across the region, including the Octopus card in Hong Kong and resident apps like AlipayHK and WeChat Pay HK. These products operate under territorial regulations designed primarily for residents and local bank accounts. See Octopus, AlipayHK and WeChat Pay HK for Visitors 2026 for visitor Octopus options and Hong Kong wallet registration limits. For mobile data across the same three jurisdictions, see eSIM and SIM across Hong Kong, Macau and mainland China. International travelers should rely on standard bank cards in Hong Kong and Macau, and foreign-card-enabled mainland mobile payment apps on the mainland.
Cash declaration at the borders
Passing between Hong Kong SAR, Macau SAR, and mainland China involves clearing separate customs checkpoints. Each crossing enforces its own statutory declaration thresholds for physical cash and negotiable instruments.
| Crossing into | Declare when carrying | Official source |
|---|---|---|
| Hong Kong SAR | Currency and bearer negotiable instruments (CBNIs) with a total value more than HKD 120,000 (or equivalent) | Hong Kong Customs and Excise Department (Cap. 629) |
| Macau SAR | Cash or CBNIs with a total value of MOP 120,000 or above (or equivalent) | Macau Customs Service (Law 6/2017) and Macao Government Tourism Office |
| Mainland China | RMB 20,000 or above in domestic cash, or foreign-currency cash equivalent to US$5,000 or above | General Administration of Customs of China (GACC) |
Thresholds verified 30 September 2026 against official statutory publications.
Hong Kong declaration rules
Under the Cross-boundary Movement of Physical Currency and Bearer Negotiable Instruments Ordinance (Cap. 629), arriving travelers carrying CBNIs valued at more than HKD 120,000 must declare in writing at the Red Channel. Passing the Green Channel above this limit is an offence.
Macau declaration rules
Under Macau Law No. 6/2017, travelers entering Macau SAR carrying cash or CBNIs valued at MOP 120,000 or above must complete a declaration form at the Red Channel. Travelers carrying less do not need to declare.
Mainland China declaration rules
The General Administration of Customs of China (GACC) enforces two thresholds:
- Renminbi cash: Travelers entering or exiting mainland China may carry up to RMB 20,000 in domestic cash. Bringing in or taking out RMB cash at or above RMB 20,000 is prohibited under standard passenger clearance rules without specialized permits.
- Foreign currency cash: Inbound travelers carrying foreign-currency cash equivalent to US$5,000 or above must declare at the Red Channel. Outbound passengers carrying foreign cash above equivalent limits must present bank foreign exchange permits.
For crossing procedures and routes, see our guides on Hong Kong to Mainland China crossings and Macau to Zhuhai and Guangzhou.
ATMs, cards and mobile pay
Managing payment mechanisms across the three jurisdictions requires matching your tools to local infrastructure.
Payment methods in Hong Kong SAR and Macau SAR
In Hong Kong and Macau, international cards and cash form the standard setup for visitors:
- Bank cards: Visa, Mastercard, and UnionPay cards are widely accepted at hotels, restaurants, shopping malls, and ferry piers. American Express is accepted at major international venues.
- Bank ATMs: ATMs operated by major banks—such as HSBC, Hang Seng, Bank of China (Hong Kong), Standard Chartered, and BNU in Macau—are plentiful in transit hubs, supporting Plus, Cirrus, and UnionPay networks. Use bank-branch ATMs rather than unbranded machines.
- Cash: Keep a modest amount of physical cash for street food, traditional markets, and taxis. Taxis in Hong Kong generally require cash unless equipped with third-party digital terminals.
Payment methods in mainland China
The mainland payment ecosystem relies primarily on smartphone QR code transactions:
- Mobile wallets: Daily commerce—including dining, hailing rides, metro gates, and convenience stores—runs overwhelmingly through mobile payment apps.
- Linking foreign cards: International travelers can link an international Visa or Mastercard directly to mainland apps before departure. Set this up in advance using our guides on Alipay for foreigners and how first-time visitors should set up Alipay and WeChat Pay.
- Physical cash reserve: Carry a modest reserve of physical RMB banknotes for edge cases where a QR code or card is not accepted. While small shops may occasionally lack change for large notes, businesses cannot legally refuse cash, providing an essential backup for phone battery or network issues.
- Departure shopping tax refunds: If you purchase eligible goods at certified tax-refund stores in mainland cities, see our guide on the China tax refund for foreigners.
To connect everyday travel practicalities with regional context, see our culture experiences.
Changing money without chasing one posted quote
Spending vacation hours searching for a marginally better exchange rate is rarely worth the effort. The spread between reputable counters on typical travel amounts is small compared to the convenience of getting settled.
Practical currency exchange rules
- Compare posted quotes at the time: Check the buy-sell spread on the counter board before exchanging funds.
- Use licensed bank branches and recognized counters: Use foreign exchange desks at airport arrivals, major rail hubs, or licensed exchange bureaus in commercial districts. Avoid informal street money changers near border gates.
- Check official frameworks: Consult official documentation from the HKMA on the Linked Exchange Rate System or the AMCM on pataca circulation for structural guidance rather than informal forum posts.
- Convert only what you need: Change only the cash you expect to spend in each territory. Converting back and forth between HKD, MOP, and RMB incurs conversion costs on each transaction.
Three common money mistakes to avoid
- Mistake 1: Relying solely on HKD when entering the mainland. Arriving at Shenzhen or Guangzhou rail terminals without RMB cash or mobile payment leaves you unable to purchase transit passes or food.
- Mistake 2: Carrying surplus MOP into Hong Kong. Once you leave Macau, Hong Kong merchants will reject your patacas, requiring a separate visit to an exchange counter that accepts MOP at a discount.
- Mistake 3: Skipping border cash declarations. Failing to declare cash or monetary instruments exceeding statutory limits (more than HKD 120,000 for Hong Kong, MOP 120,000 or above for Macau, or RMB 20,000 / US$5,000 equivalent for the mainland) can lead to customs questioning and administrative penalties.
Sample routes / how this fits a China trip
Understanding local money flows makes multi-city itineraries across the Greater Bay Area straightforward.
A classic route flies into Hong Kong International Airport, spends several days in Hong Kong SAR, takes the ferry or Hong Kong-Zhuhai-Macao Bridge shuttle into Macau SAR, crosses overland into Zhuhai, and connects by high-speed rail to Guangzhou.
For travelers deciding whether to add Shenzhen between Hong Kong and Guangzhou, see our Shenzhen guide for travellers. For border logistics, consult our guides on Hong Kong to Mainland China crossings and Macau to Zhuhai and Guangzhou.
From Guangzhou, high-speed rail links open up onward routes toward Guilin, Chengdu, Shanghai, and Beijing, creating a balanced itinerary from southern ports to northern heritage hubs.
Build this trip with LocalKey
Coordinating travel across multiple administrative regions, distinct border checkpoints, and separate payment systems requires clear planning. Through our private China tours, LocalKey organizes seamless regional itineraries tailored to your schedule.
LocalKey arranges Hong Kong and Macau segments directly—including hand-picked hotels, local licensed guides, and private vehicle border transfers—as an integrated part of your wider China trip. We coordinate the sequence of your crossings so that your documentation, transit arrangements, and local payments align smoothly from start to finish.
We offer two distinct travel formats:
- Independent: Designed for independent travelers who want an organized framework with complete flexibility. We handle your curated hotel bookings, intercity rail tickets, cross-boundary connections, and detailed app-based daily roadbook, backed by 7×24 specialist support. Optional add-ons can be booked on demand, including airport or border station pickups, a dedicated private car and driver, and a local guide for specific days.
- Private Guided: A dedicated, fully escorted private journey. Enjoy seamless door-to-door coordination with private vehicles and expert local guides throughout your trip, including private border crossings and guided touring across Hong Kong, Macau, and the mainland.
To begin planning your route across Hong Kong, Macau, and mainland China, reach out through our contact page. You will work directly with a 1:1 specialist who provides personalized route planning and 7×24 WeChat or WhatsApp backup throughout your journey.
Sources
- Hong Kong Monetary Authority: Notes and Coins in Hong Kong — Verified 30 September 2026.
- Hong Kong Monetary Authority: Linked Exchange Rate System — Verified 30 September 2026.
- Monetary Authority of Macao: Legal Tender and Currency in Circulation — Verified 30 September 2026.
- People's Bank of China: Renminbi Administration Regulations and Cash Acceptance — Verified 30 September 2026.
- Hong Kong Customs and Excise Department: Declaration of Currency and Bearer Negotiable Instruments — Verified 30 September 2026.
- Macau Customs Service: Clearance and Declaration of Currency and Bearer Negotiable Instruments — Verified 30 September 2026.
- Macao Government Tourism Office: Customs Clearance and Useful Information — Verified 30 September 2026.
- General Administration of Customs of China: Passenger Clearance Guidelines — Verified 30 September 2026.
- LocalKey Travel: Hong Kong to Mainland China Crossings Guide — Verified 30 September 2026.
- LocalKey Travel: Macau to Zhuhai and Guangzhou Crossings Guide — Verified 30 September 2026.
- LocalKey Travel: Alipay for Foreigners 2026 — Verified 30 September 2026.
