Why Indian space start-ups are feeling forced to set up base abroad
https://theprint.in/science/why-indian-space-start-ups-are-feeling-forced-to-set-up-base-abroad/441982/
A foreign company that wants to launch onboard the Polar Satellite Launch Vehicle (PSLV), which is often touted as one of the most cost-effective and reliable launch vehicles in the world, pay 0 per cent Goods and Services Tax (GST). 

In contrast, an Indian space startup has to cough up 18 per cent GST to launch from India.

Therefore, it might be easier for an entrepreneur to go set up a company in Singapore or any other destination instead of attempting a PSLV launch as an Indian company.