The manual
A guide explains. A manual is what you keep open while you do it.
Every page here walks one government procedure end to end: which form, what goes in it, which office, what it costs, and what commonly goes wrong. Every fee links to the official source it came from, with the date we last checked it.
One procedure so far, honestly. Company registration is the prototype: the procedure people worry about most, modelled end to end. The rest follow one at a time, and each is published only once its fees are verified against Department of Business Development, Revenue Department, Social Security Office. Handed a Thai form you cannot read? The form glossary already covers every document these procedures use.