Before you start

Passport with a valid long-stay visa or extension stamp
A certificate of residence from Jomtien Immigration or your embassy, or a work permit
A Thai mobile number for the banking app's one-time passwords
A small opening cash deposit

Step-by-step

1
Get a certificate of residence first
Most Pattaya branches now want proof you actually live here. Jomtien Immigration issues a certificate of residence free but slowly; your embassy can usually do it faster for a fee. A work permit substitutes where you hold one. Some branches will accept a registered lease plus the TM30 receipt — worth telephoning the specific branch before making the trip.
In personWho: YouSame day at an embassy; days to weeks through ImmigrationFree through Immigration or an embassy fee
2
Choose the branch as carefully as the bank
Bangkok Bank, Kasikornbank and Siam Commercial Bank are the three most used by foreigners here, and Pattaya branches see foreign applicants constantly. Branch managers have wide discretion, so a refusal at one is a fact about that branch rather than about you. If you will be presenting a passbook annually for a retirement extension, weight convenience heavily — you want a branch you can walk to.
In personWho: YouSame dayFree
3
Open the account and take a passbook
Present your documents, fund the small opening deposit and take a debit card, which carries a modest annual fee. Ask specifically for a passbook if one is not offered — Immigration wants to see the transaction history for a retirement extension, and an app screen is not a substitute. Keep it updated at the branch or a machine so the printed history is current when you need it.
In personWho: You30 to 60 minutesSmall opening deposit plus an annual debit card fee
4
Register PromptPay and install the app
PromptPay is Thailand's instant transfer system and is how rent, restaurants, markets and bill-splitting actually work. Register it against the account and install the bank's app, which needs your Thai SIM for the one-time password. A foreign card works at hotels and supermarkets and very little else.
Mobile appWho: You15 to 30 minutesFree
5
If you are on a retirement extension, set up the annual rhythm now
Diarise the seasoning windows against your extension date: the period the balance must be in place beforehand, the period it must remain afterwards, and the minimum to hold through the year. Get the bank letter Immigration requires a few days before the appointment, not weeks — it has a short validity. Doing this once, properly, converts an annual scramble into an afternoon.
In personWho: YouSet up once, then annuallyA small fee for the bank letter

Documents you’ll need

Passport with current visa page and entry stamp
Long-stay visa or extension, or a work permit
Certificate of residence, or a lease plus TM30 receipt where the branch accepts it
Thai mobile number for app activation
Opening cash deposit

Things most newcomers don’t know

For a retiree, the bank account is part of the visa — and Immigration reads the passbook history, not the closing balance.

The retirement extension's financial test is not a snapshot. The balance must be seasoned for a period before the application, maintained for a period afterwards, and kept above a minimum through the year. Immigration reviews the printed transaction history to check exactly that. Someone who tops the account up the week before and empties it the week after has a paper trail that fails on inspection. Ask the bank for a passbook, keep it updated, and treat the account as a compliance instrument rather than a wallet.

Source: Thai Immigration Bureau retirement extension financial requirements

An agent who offers to supply the balance is offering to commit fraud on your behalf.

Pattaya's visa-agent trade is the largest in Thailand and mostly legitimate. But the practice of lending an applicant the required 800,000 baht for the seasoning period, then withdrawing it, is document fraud rather than a service. Immigration is aware of it, it has been prosecuted, and the consequence for the applicant is refusal and potentially a ban. A legitimate agent handles the queue and the paperwork; they do not manufacture the money.

Source: Thai Immigration Bureau enforcement practice

Branch discretion is the whole story, and a refusal is a fact about the branch.

Thai banks give branch managers wide latitude, and identical applicants get different answers at different counters on the same day. Pattaya branches deal with foreigners constantly, so the experienced ones move fast — and are also quick to decline anyone on a tourist stamp or without a provable address. Arrive with a certificate of residence and a genuine long-stay visa and it is a short conversation. Arrive without either and persistence will not help.

Source: Thai retail banking practice

A Thai account does not change how remitted foreign income is taxed.

Since 1 January 2024, foreign-sourced income earned while you are a Thai tax resident is assessable when you bring it into Thailand, whenever you bring it. Holding a Thai account, or transferring in gradually, changes nothing about that. Income earned before 2024 is outside the rule regardless of when you remit it — which makes dated records of when funds were earned, as distinct from when they moved, genuinely valuable for anyone who retired here with accumulated savings.

Source: Revenue Department orders Por. 161/2566 and Por. 162/2566

Common mistakes to avoid

Attempting to open an account on a visa-exempt or tourist stamp, which most Pattaya branches now decline
Not asking for a passbook, when Immigration wants the printed transaction history for a retirement extension
Treating the retirement balance as a one-day hurdle rather than a year-round condition
Accepting an agent's offer to supply the balance, which is fraud and risks a ban
Not having a Thai SIM yet, which blocks app activation and PromptPay
Letting the account go dormant while you are out of the country over the low season

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.