The Department of Finance has an online tax calculator to show the benefits of the upcoming Tax Reform for Acceleration and Inclusion (TRAIN).

The calculator is fairly simple and straightforward. It will ask for your marital status, if private or government employee, gross monthly salary, and the number of dependents.
Again, the main purpose of the portal is just to show how much working Filipinos will be able to save when the new income tax scheme gets implemented.
To access the online tax calculator, click here.

I just want to point out that DOF has not yet used the latest contribution table for SSS, correct me if I’m wrong but as of today (August 29) it’s still using the old contribution table computation which makes the ” Income Tax” calculation a bit inconsistent/wrong.
I want to reach out to them but I chose to an updated income tax calculator myself so we get the most updated computation.