Visa First
Before anything else, settle your visa status — a tourist visa or visa exemption is fine for scouting the city, but longer stays require a proper plan (education visa, retirement visa, work permit via a Thai employer, or the newer long-term resident options). Don’t sign a 12-month lease on tourist-visa status without a plan for renewal.
Finding Housing
Most expats rent rather than buy. Facebook groups and local agents (rather than international listing sites) tend to have the best inventory and prices — expect to pay a 2-month deposit plus first month upfront, and always view in person before wiring anything.
Opening a Bank Account
Thai banks generally require a work permit or long-term visa to open a full account; some (Bangkok Bank, Kasikorn) offer more accessible options for foreigners with the right paperwork. Bring your passport, visa, and proof of address — and expect the process to take a full morning at a branch.
SIM & Internet
Get a local SIM immediately (AIS, DTAC, and True all sell tourist and long-term packages at the airport or any mall). Home internet installation for a condo typically takes 3-7 days once you have a lease.
First-Month Checklist
Register your address if required by your visa type, get a Thai phone number tied to your name for banking/delivery apps, and set up Grab or Bolt immediately — ride-hailing and food delivery apps are essential daily infrastructure in Bangkok, not a convenience extra.