Thailand's banking sector is dominated by a handful of large commercial banks: Bangkok Bank (the largest by assets and most foreigner-friendly historically, with dedicated international banking desks), Kasikornbank (KBank, strong mobile app K PLUS), Siam Commercial Bank (SCB), Krungthai Bank (state-owned, widely used for government-linked payments), and Krungsri (Bank of Ayudhya, part of MUFG). For foreign residents, Bangkok Bank and KBank are generally considered the most practical choices due to English-language support, branch experience with expats, and functional mobile apps.
Choosing the right bank affects day-to-day convenience — English support, app usability, ATM network size, and branch staff familiarity with foreign customers vary meaningfully between Thailand's major banks.
Key Facts
Bangkok Bank: largest Thai bank by assets, historically the most foreigner-experienced with dedicated international/expat banking services.
Kasikornbank (KBank): well-regarded K PLUS mobile app, widely used by both locals and expats for daily banking and QR payments.
Siam Commercial Bank (SCB): SCB Easy app is popular; large branch network.
Krungthai Bank: state-owned, commonly used for government-linked accounts (e.g. some visa/immigration-linked payments) and civil servant payroll.
Krungsri (Bank of Ayudhya): part of Japan's MUFG group, competitive for those with Japan-linked business or banking needs.
Common Mistakes
Picking a bank based on branch proximity alone rather than checking which local branch has experience serving foreign customers.
Assuming all major Thai banks have equally good English-language mobile apps and support — quality varies by bank and even by branch.