On the same $150,000 gross, a worker takes home roughly ₹12,250 more per year in India than in Singapore. That gap reflects the tax structure alone — before rent, healthcare, or savings behaviour come into play.
Housing is the first multiplier. India has moderate rent pressure, while Singapore has very high rent pressure. That keeps India's nominal advantage closer to a real-world advantage.
Healthcare and pensions go in the opposite direction. India runs a mixed healthcare model — Mostly private out-of-pocket or employer cover; public system varies sharply. Singapore uses a mixed model — MediSave/MediShield is mandatory for citizens & PRs; expats use private cover. The country with lower take-home often shifts costs that the other country leaves to your private budget.
Net-of-everything, a relocation decision should weigh basic public welfare in India against balanced public welfare in Singapore, plus differences in pension capture, social safety nets, and city-level cost of living.