Guam Currency & Money Guide: Exchange, Cards, and Tips

Guam uses the US Dollar (USD), and while credit cards are widely accepted in tourist hubs like Tumon, carrying some cash is essential for smaller vendors and local markets. For the best experience, use a Hello eSIM for Guam to stay connected and track your spending in real-time with the Hello app's multi-currency expense tracker.

Guam is an unincorporated territory of the United States, meaning the official Guam currency is the US Dollar (USD). For travelers visiting from Singapore, the exchange rate as of early 2026 typically hovers around 1 SGD to 0.75 USD. While you can find currency exchange booths at Antonio B. Won Pat International Airport, these often come with higher margins and service fees that can eat into your budget.

For better rates, consider exchanging a small amount of cash before you leave home and then using local banks like the Bank of Guam or First Hawaiian Bank once you arrive. Most major hotels in the Tumon district also offer exchange services, though they are rarely as competitive as bank rates. According to data from the Guam Visitors Bureau (GVB), the island saw a significant recovery in tourism in 2024, welcoming over 600,000 visitors, which has led to more competitive financial services in high-traffic areas. To keep your finances organized, the Hello app allows you to track your spending in USD while seeing the equivalent in SGD automatically, ensuring you never lose track of your actual holiday spend.

Credit cards are the preferred method of payment in Guam, especially within the major shopping malls, luxury boutiques, and hotels. Visa and Mastercard are universally accepted, while American Express and Discover are also common. Interestingly, due to the high volume of East Asian tourists, many retailers also accept JCB and UnionPay.

Contactless payments via Apple Pay and Google Pay have become standard at major retailers like ABC Stores, Ross Dress for Less, and the Micronesia Mall. In 2026, a casual lunch in Tumon typically costs between $18 and $25, and being able to tap-and-go makes the process seamless. For high-end shopping at DFS T Galleria, you will often see signs for WeChat Pay and Alipay to accommodate international shoppers. However, if you venture out to the Wednesday Night Market at Chamorro Village or smaller food trucks along the coast, cash remains king. To ensure you can always access your digital wallets or check your bank balance securely, an Hello eSIM for Guam provides the reliable data connection you need without the risk of using unsecured public Wi-Fi.

ATMs are plentiful across the island, particularly in the Tumon tourist district, grocery stores like Pay-Less Supermarkets, and gas stations. Most local ATMs charge a convenience fee ranging from $3.00 to $5.00 per transaction for non-customers, in addition to whatever fees your home bank may apply for international withdrawals. To minimize these costs, it is best to withdraw larger sums less frequently rather than making multiple small transactions.

When using an ATM, always choose to be charged in the local currency (USD) rather than letting the ATM perform the conversion for you; this 'Dynamic Currency Conversion' is almost always a worse deal. If you are traveling with a group, the Hello app’s expense splitting feature is incredibly helpful here. You can record a large cash withdrawal or a shared dinner bill in USD, and the app will calculate everyone’s share using live exchange rates, making it easy to settle up later in any currency.

Tipping in Guam follows the general standards of the United States, though there is a local nuance to be aware of. In most sit-down restaurants in tourist areas, a service charge of 10% to 15% is often automatically added to the bill. Always check your receipt for terms like 'Service Charge' or 'SC' before adding an additional tip. If a service charge is not included, a standard tip of 15% to 20% is expected for good service.

For other services, the following guidelines apply in 2026: Taxis generally expect a 10-15% tip, while hotel porters appreciate $2-$3 per bag. At bars, $1-$2 per drink is the norm. At the spa or for tour guides, 15% is a generous gesture. Understanding these customs helps you blend in and ensures the local service workers, who are a vital part of the island's economy, are fairly compensated. You can use the Hello app’s AI receipt scanning feature to quickly snap a photo of your bill; the app recognizes the service charge and helps you categorize the expense accurately for your trip budget.

Is Guam expensive? Compared to Southeast Asia, yes. Expect prices similar to mid-sized US cities. A latte in 2026 costs around $7.00, and a mid-range dinner for two can easily reach $100. Can I use Singapore Dollars in Guam? No, SGD is not accepted for payment; you must use USD or a credit card. Are there money scams to watch out for? Guam is generally very safe, but be cautious of 'unmetered' taxis. Always ensure the meter is running or agree on a price beforehand to avoid being overcharged.

Another frequent question is about data roaming costs. Many travelers get hit with 'bill shock' from their home telco after using maps or social media on the island. Using a Hello eSIM is the most cost-effective way to stay connected. You can buy and activate your plan before you even land at GUM airport, ensuring you have data for navigation and price comparisons the moment you arrive. This prevents the need to hunt for local SIM cards or pay exorbitant roaming fees.

While Guam can be pricey, there are several ways to save. First, take advantage of the 'Guam Shopping' culture; as a duty-free port, there is no sales tax on the island, which can save you 5-10% compared to the US mainland or other destinations. For meals, look for 'Plate Lunches' at local spots outside of Tumon, which offer massive portions of Chamorro BBQ for $12-$15—often enough for two people.

Transportation is another area where costs add up. Taxis are expensive, so consider using the Stroll Guam app (a local rideshare) or the Red Guahan Shuttle for getting between malls. To keep a tight grip on your finances, use the Hello app to set a daily budget. The app’s AI-powered categorization will show you exactly how much you are spending on 'Food & Drink' versus 'Shopping.' If you are traveling with friends, the voice expense entry feature allows you to quickly log a purchase like 'Twenty dollars for bus tickets' without stopping your exploration. By staying connected with a Hello eSIM and tracking your spending, you can enjoy the tropical beauty of Guam without any financial surprises.