Does the 15000 USD requirement for a Thai visa need to be in my primary bank account?

The $15,000 requirement for Thai visa applications does not necessarily need to be in your primary bank account. It is important that the funds are readily accessible without notice. A High Yield Savings Account (HYSA) should be acceptable if the money is instantly accessible. The specific account type may not matter as long as the funds meet the necessary accessibility criteria, but it's best to confirm with the consulate handling your visa application.