Despite being one of the easiest contribution to be computed, it is a surprise to me to find out that it is not always fixed. With the help of this Pag-IBIG Calculator tool, checking out the difference would be a breeze.
For membership contribution of a non-working spouse, please see image below:
For a more detailed guideline, please visit the basis of this tool at the Pag-IBIG Contribution Guideline.