I will use the search function, thank you. (Im german citizen and Malta resident)
I want to visit
Singapore,
Hong Kong, Vietnam and Thailand in 2019.
Since I'm a no-name commenter on the internet with no reputation at stake, don't take this as final conclusion. Furthermore, I'm a consumer of tax advice not giver - my basis for comment is to relay information what I've heard from paid conversations when setting up my own structures. 2 More questions:
1. How long do you intend to stay in Singapore,
Hong Kong, Vietnam and Thailand in 2019? Do you foresee your stay to extend beyond
3 months in any of the mentioned countries?
2. Do you earn income from any of the following countries in 2019:
Malta, Singapore, Hong Kong, Vietnam or Thailand? It's best to earn income from as few (preferrably none) of the states mentioned. Local income is subject to local taxes in all of those countries mentioned (and more importantly - local declaration and reporting). Even when you can get tax credits in Malta, you do not want to have have an obligation to fill tax forms in 5 countries. It would be a major maintenance burden.
It would considerably ease your life in 2019 if you:
a. Do not earn income in Malta, Singapore, Hong Kong, Vietnam and Thailand
b. Do not stay in any of the countries besides Malta for more than 90 days. Although the standard residency test is 183 days, many countries require you to fill forms and elaborate your reason for stay after 90 days.
If you fulfill a and b, your total tax bill will be 5000 euros in 2019 (in benefit of Malta) regardless of how much you earn. And you only declare your income to Malta. Capital gains earned abroad will be fully tax exempt.