For your situation, both freelance/professional and business owner DTV categories are possible. For future LTR/PR, the business owner route usually looks stronger as it shows economic contribution. Given the uncertain situation at the Thailand–Cambodia border, it’s generally safer to apply from Vietnam or Laos. Make sure all business and tax documents are complete.
Just to share from my experience: our cooking school is in Chiang Mai, and we’ve helped students with the DTV visa process. One of our students from the UK applied at the Thai Embassy in the UK and got approved. The whole process took about 2 weeks.
Hopefully this gives a bit of insight for anyone planning to apply. Happy to answer factual questions about the process!
Your situation is actually quite common for freelancers who have long-term contracts with one main client.
For the DTV visa application in Jakarta, the goal is to prove consistent freelance income and work arrangement, not necessarily multiple clients.
Here’s what I recommend you prepare:
1. Invoices for the past 6–12 months that match the deposits in your bank account.
2. Bank statements showing these payments.
3. A contract or agreement with your client (even if old, it helps prove the ongoing work relationship).
4. Portfolio or work samples — even if they are all from the same client, include a few pieces to show the type of work you do.
5. A letter from the client confirming you work remotely as a freelancer for them, how long you’ve been working together, and that you’re free to work from Thailand.
If all of this is consistent, it should meet the requirement. The key is to show the consulate that you are self-employed / freelance and that your income is independent of a Thai employer.