Which channel gives you the most baht?
A licensed exchange office pays more baht per unit of foreign currency than a bank counter or a foreign-card ATM. Banks build a wider spread into the board rate and close in the late afternoon.
ATMs charge a flat fee per withdrawal on top of whatever your home bank adds. The gap between the best and the worst channel on a single 1,000 USD exchange runs into thousands of baht.
As of 2026, a Thai ATM charges a foreign card a fixed 220 THB per withdrawal, and some banks charge 250 THB. Exchange offices in Phuket normally pay a better rate than bank counters and ATMs on the same currency and the same day.
Key facts
- A Thai ATM charges a foreign card a fixed 220 THB per withdrawal as of 2026.
- Airport currency counters typically pay 5 to 10 percent less than city offices as of 2026.
- A 1,000 USD exchange loses roughly 1,600 to 3,200 THB at the airport rate.
- Declining DCC saves 3 to 7 percent of a transaction as of 2026.
- A 20,000 THB withdrawal costs 600 to 1,400 THB more when DCC is accepted.
- On 4 September 2026 50 and 100 USD notes are bought at 32.5 THB per dollar.
- A confirmed rate holds for 60 minutes after you agree it in chat.
- An ordinary cash exchange takes up to 15 minutes at the counter.
| Channel | Rate quality | Extra cost per transaction | Passport | Typical hours |
|---|---|---|---|---|
| Licensed exchange office | Highest of the four | None, when the rate is a net rate | Required for cash | Long, often to 21:00 |
| Bank counter | Wider spread than a booth | Bank service charge on some currencies | Required | Roughly 09:00 to 16:30 |
| ATM with a foreign card | Card-network rate, then fees | 220 THB, plus your own bank's charge | No | 24 hours |
| Airport counter | 5 to 10 percent worse | Built into the rate | Required | Flight hours |
Read the table one row at a time. The exchange office wins on rate and loses on opening hours compared with an ATM. The airport wins on convenience and costs the most. CAT Exchange publishes its own numbers on the Phuket exchange rates page, updated from the same feed the counter uses.
How do you read a buy and sell rate board?
Buy is what the office pays you for your foreign currency. Sell is what the office charges when you buy foreign currency back with baht. A board showing USD 32.51 buy and 33.30 sell means you receive 32.51 THB per dollar handed over, and you pay 33.30 THB per dollar bought back.
On 4 September 2026 CAT Exchange buys 50 and 100 US dollar notes at 32.5 THB per dollar and euro cash at 37.71 THB per euro at its Bang Tao office, with the commission already inside the quoted number.
The distance between buy and sell is the spread, and the spread is where an exchange office earns. A narrow spread on the board is a good sign. A board that quotes only one number for each currency tells you nothing until you ask which side of the deal it belongs to.
Watch for a second trap. Some boards advertise a headline rate that applies to a single denomination, usually the 100 dollar note, while the rate for anything smaller sits in fine print or nowhere at all. Ask for the rate on the notes you are actually holding before you count them out.
Why is the airport the worst place to change money?
Airport counters pay less because they can. A traveller landing at 23:00 with no baht has no alternative within walking distance, and the counters price that captive position into the board.
Airport currency counters in Thailand typically pay 5 to 10 percent less than city exchange offices as of 2026. On a 1,000 USD exchange that gap is worth roughly 1,600 to 3,200 THB, enough to cover a week of scooter rental.
Change the minimum you need to reach your hotel, then handle the real amount once you are in a district with competition. Taxi, transfer and the first meal rarely need more than 2,000 to 3,000 THB.
What is DCC and how much does it cost?
Dynamic currency conversion is the screen that offers to charge your card in your home currency instead of Thai baht.
Choosing your home currency hands the conversion to the terminal operator, who applies a markup of 3 to 7 percent as of 2026. Choosing THB sends the transaction through your card network at a far tighter rate.
Always press the Thai baht option at an ATM or a card terminal in Thailand. Declining dynamic currency conversion saves 3 to 7 percent of the transaction as of 2026, which on a 20,000 THB withdrawal is 600 to 1,400 THB.
The prompt is designed to sound helpful. Decline it every time, on every terminal, in every shop.
Why do small notes get a worse rate than big ones?
A 100 dollar note is cheaper for an exchange office to handle, store and ship to its bank than twenty 5 dollar notes of the same value. That cost difference shows up as a lower rate on small denominations, and the same logic applies to yuan and ringgit.
On 4 September 2026 CAT Exchange pays 32.5 THB per dollar on 50 and 100 notes, 32.33 THB on 5, 10 and 20 notes, and 31.84 THB on 1 and 2 dollar notes.
Condition matters as much as denomination. Tears, tape, pen marks, bank stamps and water damage all reduce what an office will pay, because the bank behind the office applies the same inspection later.
Bring flat, clean, unfolded notes and you get the top tier. The US dollar denominations guide covers the pre-2006 white series and the stamped-note problem in detail.
What should you check before you hand over your cash?
Run through six points before the notes leave your hand.
- Confirm the rate for your denominations, not the headline number on the board.
- Ask whether the rate is net. A net rate means nothing is deducted afterwards for counting or handling.
- Do the arithmetic yourself. Amount times rate equals baht. Write it down before you start.
- Bring your passport. Thai law requires a licensed money changer to identify anyone exchanging cash on the premises.
- Count the baht at the counter, in front of the cashier, before you walk away.
- Keep the receipt. You will need it if you want to change baht back before flying out.
Thai law requires a licensed money changer to identify every customer exchanging cash on the premises, so bring your passport, not a photo of it. Remote settlements such as an SBP transfer or USDT paid to a Thai card follow a different rule.
How does an exchange work at CAT Exchange?
You write first, then travel. Send the currency, the amount and the denominations to WhatsApp or Telegram, get a rate back, and that rate holds for the next 60 minutes while you drive over.
CAT Exchange holds a confirmed rate for 60 minutes after the customer agrees to it in chat, works at a net rate with no counting or handling fee, and takes up to 15 minutes at the counter for an ordinary cash exchange.
The office sits at 246 Bandon-Cherngtalay Rd, Si Sunthon, and opens daily from 09:00 to 21:00. Directions and landmarks are on the Bang Tao office page.
For a large amount, cash delivery brings the baht to your villa or hotel instead, free inside Bang Tao.
Bang Tao office
246 Bandon-Cherngtalay Rd, Si Sunthon, Thalang District, Phuket 83110, Thailand- HoursDaily 09:00–21:00
- Phone+66 84 263 9185
FAQ
How much cash should I change at the airport?
Enough for the transfer and the first evening, so 2,000 to 3,000 THB for most arrivals. Airport counters pay 5 to 10 percent less than city offices as of 2026, so the rest is better changed the next day.
Is it cheaper to use my card everywhere instead of carrying cash?
Cards work in malls, hotels and larger restaurants. Markets, beach vendors, songthaews, small clinics and many scooter rentals in Phuket still want baht in hand, so most visitors carry both.
Do I need a passport to exchange money in Phuket?
Yes, for any cash exchange on the premises of a licensed money changer. A photo on your phone does not satisfy the requirement. Remote operations settled by transfer work under different rules.
Which currency gives the best value in Thailand?
US dollars in 50 and 100 notes and euros are the most widely quoted and the easiest to change across the island. Rates for each currency we buy sit on the rates page, and the USD to THB page shows the dollar tiers.
Can I change Thai baht back before my flight home?
Ask before you come. Reverse exchange depends on what the office holds that day, so the currency, the amount and the rate get confirmed in chat first. More answers sit on the FAQ page.