Refusals are rarely about money. They are about the case officer not being convinced you will go home again. Here are the patterns that keep repeating.
A refusal is explained briefly, often in a few sentences referring to the Visa Code. Behind those sentences sit a handful of patterns that repeat.
This is the big one. No job to return to, no home, no obligations in Thailand — and the case officer judges the risk of you staying as too high. The remedy is documents, not assurances: employment contract, payslips, title deed, school confirmation for children.
An account that received a large deposit two weeks ago looks like a loan, not savings. Show account history over time, stamped by the bank. If someone else is covering the trip, it must be stated in black and white in the sponsor form — not merely implied.
You write that you are going on holiday for three weeks, but the flight reservation is for six. You write that you are staying with your partner, but submit a hotel booking. Such gaps read as something being held back.
Missing insurance, wrong photo format, empty fields, an unsigned form. This is the worst reason to be refused, because it is entirely avoidable.
Previous overstay, a previous refusal left unexplained, or information that does not match what you stated before. If you have been refused before, the new application must actively answer why the situation is different now.
Read the reasoning word for word. You can appeal within the deadline stated in the decision, but in many cases a new and better documented application is faster than an appeal — provided you actually fix what was weak. Sending the same application again gets the same answer.
A cover letter that explains your case in plain words is not decoration. It is where you get to answer the question the case officer is asking.