When we file our income tax, is it for the year or quarterly? How much of our monthly salary do we reflect in it?

Hi anon,

It will be for a full year. All income declared within that year, inclusive of allowances that are subject to CPF, bonuses, AWS, will be reflected if your employer is on the auto inclusion scheme (AIS). So if income was declared on 30th Dec and credited on 2nd Jan, it still counts as last year's income.

If your employer is not on AIS you will have to file on your own.

Yearly. Basically the total income earned from Jan 2019 to Dec 2019.

But nowadays if you are not self employed, most companies are auto filling already which means they will submit for you.