Why Cambodia Uses Both US Dollars and Riel

Prepared by the NovAsia Editorial Team

Cambodia’s official currency is the riel, but US dollars have circulated alongside it for decades. Property, rent, vehicles, some salaries and many larger purchases are commonly quoted in dollars. Markets, local transport, small shops, utilities and everyday change often use riel.

This is not two separate economies. It is one payment system in which the two currencies are constantly converted.

For a first-time visitor, the process may feel unusual: a price is stated in dollars, the customer hands over a dollar note and receives change in riel. Long-term residents soon treat it as normal. The important habits are to check the currency, understand the working exchange rate, inspect dollar banknotes and avoid treating riel as merely loose change.

Which currency is official?

The Cambodian riel is the national currency. Its international code is KHR and its symbol is ៛. Notes are issued by the National Bank of Cambodia.

The US dollar is widely used but has not formally replaced the riel. International institutions describe Cambodia as highly dollarised because a large share of bank deposits, credit and high-value transactions has historically been denominated in foreign currency.

Three concepts should remain separate:

• the official national currency is KHR;
• USD is a widely used foreign currency;
• the currency of a particular obligation is the one stated in the price, invoice or contract.

A rent quoted in dollars does not make every other payment a dollar payment. A delivery application may use riel, a bank account may be currency-specific and a merchant may convert a dollar price at its own working rate.

Why the dollar became so common

Cambodia’s dual-currency system developed through history rather than one single legal decision.

Loss of confidence after conflict

The country’s monetary system was destroyed during the Khmer Rouge period. When the riel was reintroduced, trust in state institutions and money returned gradually. In uncertain conditions, households often preferred a currency perceived as stable and usable internationally.

The UN mission in the early 1990s

The United Nations Transitional Authority brought a significant flow of US dollars into Cambodia through salaries, contracts, rent and services. Once businesses and landlords began accepting dollars, the practice became self-reinforcing.

Tourism, aid, trade and investment

Dollars continued to enter through international organisations, tourism, exports, foreign companies, remittances, construction and finance. Where income, savings and major expenses use the same currency, businesses naturally quote prices in it.

A relatively stable exchange relationship

The National Bank of Cambodia has long supported a relatively stable relationship between the riel and the dollar. This makes everyday conversion easier, although the rate is not permanently fixed and merchants may use rounded values.

Why Cambodia continues to promote the riel

A national currency matters for monetary policy, financial resilience, seigniorage, national identity and small domestic transactions.

The more an economy relies on a currency issued elsewhere, the less influence its central bank has over liquidity and monetary conditions. Dollarisation also exposes the system to changes in US policy and international dollar availability.

Expanding riel payments, deposits and loans strengthens the domestic monetary system. This is why the National Bank promotes local-currency use while maintaining a practical dual-currency environment.

Where dollars are commonly used

USD is frequently used for:

• property prices;
• apartment and house rent;
• rental deposits;
• vehicles;
• international schools;
• private healthcare;
• hotels and tourism;
• larger electronics;
• salaries in some international companies;
• long-term contracts;
• many bank deposits and loans.

“Frequently” is not “always”. A business may invoice in riel, a government service may require national currency and a bank transfer must use the currency of the recipient’s account.

Where riel is more practical

KHR is particularly useful for:

• markets;
• fruit and vegetables;
• small shops;
• street food;
• tuk-tuks and local transport;
• everyday services;
• small cafés;
• change;
• government payments;
• riel-denominated QR transfers.

Riel use is often more visible outside central business and tourist districts.

For a resident, paying small amounts directly in riel avoids repeated conversion and rounding losses.

Receiving change in two currencies

US coins are rarely used in Cambodia. The portion of a price below one dollar is therefore normally handled in riel.

If an item costs USD 2.50 and the customer pays USD 5, the seller may return USD 2 and the riel equivalent of 50 cents.

At a working rate of KHR 4,000 per dollar, that is KHR 2,000.

A cashier may accept one currency and return a combination of both. This is not an error. The customer should calculate the total value of the change.

For small payments, an approximate rate causes little difference. For larger transactions, confirm the rate before paying.

Which exchange rate is correct?

The National Bank of Cambodia publishes an official daily rate. Commercial banks, exchange counters, payment applications and individual merchants may use slightly different rates.

In daily conversation, approximately KHR 4,000 to USD 1 is a useful mental reference, but it should not replace a current rate for a large payment.

Rounded conversion is practical in cafés, markets and tuk-tuks. A precise rate matters for rent, deposits, school fees, medical bills, transfers, electronics, refunds, property and company accounts.

Where a contract permits payment in another currency, it should state the source and timing of the conversion rate.

Riel banknotes and everyday counting

Riel circulates mainly as banknotes of different denominations. Coins play almost no role in normal daily payments.

New arrivals should focus on the printed number and the zeros rather than memorising every design immediately. Confusing KHR 1,000 with KHR 10,000 is a more common practical mistake than misunderstanding the exchange-rate theory.

Separate notes by denomination and counting quickly becomes familiar.

US banknotes are inspected carefully

A dollar note that is valid in the United States may be refused in Cambodia if it is torn, stained, written on, taped, punctured, missing a corner or excessively worn.

The reason is practical. The next merchant or bank may also reject it, leaving the recipient with difficult cash.

Inspect both sides and all corners immediately when receiving dollars. Ask for a replacement before leaving the counter or ATM area if the note is damaged.

Older designs are not automatically invalid, but small businesses may be cautious. For everyday spending, clean smaller denominations and riel are more practical than trying to pay a small bill with USD 100.

Damaged riel is easier to replace

The National Bank of Cambodia provides a formal route for exchanging damaged riel notes, subject to identification and condition requirements. A shop may still refuse a severely damaged note, but the holder has a domestic institution able to address it.

The Cambodian central bank cannot provide the same guarantee for US currency. Banks and exchange counters apply their own acceptance rules.

The practical rule is simple: use riel normally, but do not accept damaged dollars.

ATMs and currency choice

Many Cambodian ATMs dispense dollars, riel or offer a choice, depending on the bank, machine, card and cash availability.

Before confirming a withdrawal, check:

• the dispensing currency;
• amount;
• local ATM fee;
• fee charged by the card issuer;
• any offered conversion rate;
• per-transaction limit;
• banknote denominations.

Dynamic currency conversion

An ATM may offer to charge the home card in its account currency at a displayed rate. This is dynamic currency conversion and is not necessarily the cheapest option.

The better choice depends on the card issuer’s fees and exchange rate. Review those terms before travelling.

Inspect ATM cash immediately

If a machine issues a damaged dollar, remain nearby, photograph the note and machine, keep the receipt and contact the bank or branch.

Withdrawing riel directly can be convenient where most spending is in KHR, but compare the conversion and withdrawal costs.

Bank accounts in two currencies

Cambodian banks commonly offer separate USD and KHR accounts. These are distinct balances. Moving money between them is a foreign-exchange transaction using the bank’s rate.

A long-term resident may find the following structure practical:

• a USD account for rent, larger payments and dollar income;
• a KHR account for local spending and QR payments;
• an international card as backup;
• a modest amount of cash in both currencies.

Before transferring, check the recipient name, bank, account number, account currency, amount, fee and conversion method. Sending the wrong currency may trigger automatic conversion.

For a large payment, ask the recipient to confirm the currency in writing.

KHQR and Bakong

Cambodia’s banking QR system has made local payments far more convenient. Bakong and the KHQR standard allow compatible banking and payment applications to scan standardised merchant codes.

QR is now used at markets, cafés, clinics, shops, by delivery drivers and by small businesses.

A QR code can be denominated in USD or KHR. Before confirming, check the currency, recipient name, amount, fee and any conversion.

With a static QR, the payer enters the amount. With a dynamic QR, the merchant system normally inserts it. Manual entry requires particular care with zeros.

A screenshot from the payer is not proof that the money reached the merchant. The recipient should confirm the credit in their own application.

Foreign tourists may not automatically be able to use every local QR. Cross-border QR arrangements exist with several countries, but availability depends on the participating bank and application. Cash and a card remain sensible backups.

Card acceptance

International cards are widely accepted in hotels, shopping centres, larger restaurants, hospitals and supermarkets. Small vendors may take only cash or local QR.

A merchant may apply a minimum amount or surcharge, and terminals occasionally fail. Confirm the displayed amount and keep the card in view.

A long-term resident should not rely on a foreign card as the only payment method because bank security blocks, network failures and local terminal problems occur.

Where to exchange money

Banks, licensed exchange businesses and many private counters operate in Cambodian cities.

Compare the amount received rather than the headline rate. Check commission, note condition, denomination, counting process and reputation.

The rate may vary by banknote size and condition. Clean USD 100 notes can receive a favourable rate for large exchanges, while smaller notes are more useful in daily life.

For substantial sums, use a bank or established exchange business, count discreetly, retain documentation and avoid informal street transactions.

Property, business and other major payments are normally safer by traceable bank transfer with source-of-funds records than by cash exchange.

Prices without a currency symbol

Menus, advertisements and messages sometimes display a number without USD or KHR.

“10” may mean USD 10, while “10,000” usually means riel. In informal local speech, “ten” can sometimes refer to ten thousand riel.

Do not guess in a significant transaction. Ask whether the amount is USD or KHR and whether tax or service is included.

Written business communication should use clear codes such as USD 500 or KHR 2,000,000.

Rent and deposits

Residential rent and deposits in Phnom Penh are commonly denominated in USD.

The agreement should state:

• rent currency;
• deposit currency;
• accepted payment method;
• conversion method if paying in KHR;
• currency in which the deposit is returned;
• bank fees;
• due date;
• treatment of exchange-rate differences.

A tenant who pays a dollar deposit in riel at one rate should not assume the landlord will return riel at the same rate unless the contract says so.

Salary and personal budgeting

A resident may receive income in one currency and spend in both. Track the original currency of rent, utilities, school and other major obligations.

Repeatedly converting small amounts can create fees and make budgeting unclear. Keeping separate USD and KHR balances can reduce unnecessary exchange.

Do not assume that a salary stated as “1,500” is in USD without written confirmation, particularly in local employment or accounting documents.

Why a dollar price may be paid in riel

Businesses may display prices in dollars because customers understand the reference, while their point-of-sale system or bank account settles in riel.

This is normal where the conversion is transparent. The issue is not the use of two currencies but whether the exchange rate and final amount are clear before payment.

What de-dollarisation means

Cambodia’s de-dollarisation policy does not normally mean an overnight ban on dollars. It refers to gradually expanding riel use in salaries, pricing, deposits, loans and digital payments.

Measures may encourage smaller transactions in KHR, improve payment infrastructure and develop riel financial products.

Residents should not treat ordinary dollar use as illegal merely because rielisation is a policy goal. They should follow the current terms of the merchant, bank or contract.

Can a merchant refuse dollars?

Yes. A business may choose the forms of payment it accepts, and many refuse damaged dollars or prefer riel for small purchases.

A sign displaying a dollar price does not oblige a merchant to accept every denomination or condition of note.

Where payment options matter, ask before consuming the service or ordering goods.

Counterfeits and basic checks

Large dollar notes receive more scrutiny. Use banks and reputable exchange counters for significant cash transactions.

Check familiar security features and do not accept a note where the appearance, paper or print quality is suspicious. Staff at a bank or established exchange business can assess questionable cash more reliably than an informal seller.

Common mistakes made by visitors

Typical errors include:

• treating KHR 4,000 as a permanently fixed rate;
• accepting damaged dollars;
• confusing the currency of a QR code;
• paying an incorrect number of zeros;
• allowing an ATM to apply an unfavourable conversion without noticing;
• assuming cards work everywhere;
• using USD 100 for very small purchases;
• not confirming the currency of rent or a deposit;
• carrying only one payment method;
• converting large sums in an unverified location.

A practical setup for a tourist

A visitor can use a bank card for larger formal purchases, clean small-dollar notes where accepted and riel for markets, local transport and change.

Keep more than one card, some cash and offline access to accommodation and emergency details.

Do not exchange the entire travel budget on arrival. Learn the local payment pattern first.

A practical setup for a long-term resident

A resident is likely to benefit from local USD and KHR accounts, access to KHQR, a foreign backup card and small cash reserves.

Major contractual payments should remain traceable. Everyday purchases can be made directly in the currency requested without unnecessary conversion.

Checklist before a large payment

1. Confirm the exact currency.
2. Confirm the recipient and account currency.
3. Agree the exchange-rate source if conversion is allowed.
4. Check fees.
5. Inspect cash or verify the bank details.
6. Keep the contract, invoice and payment evidence.
7. Confirm receipt in writing.
8. Retain source-of-funds records where relevant.

Conclusion

Cambodia’s dual-currency system is practical once its basic rules are understood. Riel is the official national currency and the most convenient tool for many small local payments. US dollars remain widely used for rent, property, savings and larger transactions.

The safest approach is not to choose one currency exclusively. It is to understand which currency the price uses, apply a transparent exchange rate, inspect dollar cash carefully and maintain reliable cash, card and digital alternatives.

Sources

1. National Bank of Cambodia — exchange rates, riel policy, banknotes, Bakong and KHQR materials.
2. International Monetary Fund — analysis of Cambodia’s dollarised monetary system.
3. World Bank — Cambodia financial-sector and payment-system materials.
4. Cambodian commercial banks — ATM, account-currency and payment guidance.
5. Official cross-border QR and digital-payment announcements from the National Bank of Cambodia.

Frequently asked

What is Cambodia’s official currency?

The official national currency is the Cambodian riel, or KHR. The US dollar is widely used in prices, payments and banking, but it does not replace the national currency.

Can visitors pay only in US dollars?

Dollars are accepted in many cities and tourist areas, but riel is more practical for markets, transport, small purchases and change. Residents benefit from having access to both currencies.

Why is change from a dollar payment often given in riel?

Riel serves as the practical small-denomination currency because US coins are rarely used. Amounts below one dollar are therefore commonly returned in riel using the merchant’s working exchange rate.