Under which scheme S Pass holder can apply for PR in Singapore?

In order to be eligible to apply for (PR) Singapore Permanent Residence under PTS Scheme, you must be holding S Pass for at least certain years and preferably 50 years or less which is subject to case by case basis by ICA.

The PTS Scheme allows the pass holder to include in the PR application for your spouse and unmarried children who are below 21 years old.