Money in Thailand: banks, PromptPay & THB

Money infrastructure in Thailand is more than “cards work.” This guide owns banks and rails: which names appear on ATMs, how domestic value actually moves, and when a visitor should ignore account opening entirely.

Major banks you will see

Branch and ATM brands commonly include Bangkok Bank, Kasikornbank, Siam Commercial Bank, Krungthai. Tourists care because bank-branded machines from these groups usually beat independent tourist kiosks on fees and skimming risk - details in the ATM guide.

Domestic rails - how value actually moves

Inside Thailand, everyday bank value usually rides domestic rails rather than SWIFT. Understanding them prevents you from paying international wire economics for a local hotel deposit or contractor.

• PromptPay links Thai bank accounts to mobile numbers/IDs for instant THB transfers and QR. Locals use it everywhere; visitors without Thai banking fall back to cards and cash.
• BAHTNET is a domestic Thailand payment rail for THB account-to-account value. Use it for local rent, payroll, and bills once you have a participating account — reserve classic international wires for counterparties that truly cannot receive on local rails.

SWIFT still exists - use it sparingly

Correspondent wires remain useful when a beneficiary cannot receive on PromptPay. They are a poor default for anything that can terminate in THB on a domestic system.

Do tourists need a local account?

Short holidays: no. Long stays and rent: usually yes - see open a bank account (/blog/open-bank-account-thailand). Tourist-status KYC often fails at Bangkok Bank.

Local payment culture (pointer)

PromptPay QR is ubiquitous for locals; travellers without a Thai bank account still lean on cash + international cards. Day-to-day methods and tipping live in how to pay (/blog/how-to-pay-in-thailand) - this page stays focused on institutions and rails.

Worked fee path: hotel deposit in local currency

Suppose a boutique hotel in Bangkok wants a THB deposit. Path A: card at the desk - refuse dynamic currency conversion and pay in THB. Path B: domestic transfer on PromptPay from a local or multi-currency account that can terminate in THB. Path C: SWIFT from a foreign bank - intermediary fees and multi-day settlement make this the last resort for a routine hotel hold.

Glide’s posture for Thailand visitors and relocators is the same: keep spend near mid-market, prefer local rails when the counterparty can receive them, and treat multi-currency or stablecoin balances as funding layers - not as a reason to force SWIFT onto every merchant.

Numbers that matter

Mid-market FX vs the board you are shown

The mid-market rate is the midpoint between buy and sell on wholesale markets — the number Google and major FX feeds show for THB. Airport desks, hotel cashiers, and many bank boards price far away from that midpoint. A “0% commission” offer in Bangkok almost always hides the markup inside the rate.

Dynamic currency conversion (DCC) is the terminal prompt that offers to charge your home currency “for convenience.” In Thailand, refuse it: choose THB / local currency so your issuer converts near its published FX rules instead of the merchant’s padded rate.

True-cost matrix (illustrative)

Ignore “$0 fee” headlines. For money into or inside Thailand, rank options by total funded to deliver a fixed THB outcome — including FX distance from mid-market, flat fees, intermediary lifting, and time risk.

Domestic rails worth understanding

Inside Thailand, everyday bank value usually rides PromptPay and sibling domestic systems — not SWIFT. Tourists meet these rails indirectly (hotel deposits, local contractors). Residents and long-stay expats should treat them as the default once a local account exists.

• PromptPay links Thai bank accounts to mobile numbers/IDs for instant THB transfers and QR. Locals use it everywhere; visitors without Thai banking fall back to cards and cash.
• BAHTNET is a domestic Thailand payment rail for THB account-to-account value. Use it for local rent, payroll, and bills once you have a participating account — reserve classic international wires for counterparties that truly cannot receive on local rails.

Week-one money calendar

1. Before you fly: enable issuer travel/security controls; order a backup card; save Bangkok Bank ATM brands on a map around Bangkok
2. Landing day: skip full-budget airport FX; keep a tiny THB float if you already hold near-mid-market notes
3. Day 1–2: test a small card purchase in THB; refuse DCC; confirm your backup card also works
4. Day 3+: map where cash is still required (markets, tips, intercity desks) and refill only at bank lobby ATMs
5. If staying 30+ days: start local-account checklist early — tourist KYC often fails at Bangkok Bank

Fee stack anatomy (read this before any big transfer)

Every cross-border move into or out of Thailand is a stack of (1) FX distance from mid-market, (2) explicit send fees, (3) intermediary or network fees, and (4) time risk if the payment misses a payroll or rent cut-off. Marketing that highlights only one of the four is incomplete.

If a card freezes in Thailand

1. Freeze the failed card in your issuer app; do not keep retrying and burning authorizations
2. Switch to the backup card on a different network/issuer — test a small purchase first
3. Withdraw a modest THB float from a Bangkok Bank lobby ATM if cash is required
4. Use a pre-arranged emergency top-up (partner, multi-currency balance, or stablecoin offramp) — not airport desks for large amounts
5. If both cards fail, contact issuer travel support with merchant name + city; document every fee for dispute

Decision checklist before you commit

1. Write the outcome first: “Recipient holds ฿X THB by date Y.”
2. Quote at least two paths (local-rail fintech vs bank SWIFT vs card-funded cash) using the same outcome sentence
3. Confirm the beneficiary can actually receive on PromptPay — if not, SWIFT may be forced
4. Refuse DCC on every terminal; screenshot rate screens when amounts are large
5. Document fees for expense reports and future disputes

What good looks like

• You can explain the mid-market THB rate vs the board in front of you
• You never accept DCC on POS or ATM prompts in Thailand
• Local outcomes ride PromptPay when the counterparty can receive them
• Emergency funding does not depend on a single card or airport cash
• Teams use approval controls (multisig) for treasury-scale balances
• You know which Bangkok Bank (or peer) ATMs you will actually use in Bangkok