Have a valid passport 

Have a confirmed return ticket 

Have proof of accommodation 

Have a completed Form 14A 

Have a recent passport-sized color photograph 

Have a photocopy of the passport's biodata and last page  

May need additional supporting documents based on the case (Work Proof, Bank statement, ITR) 

You can apply for a Singapore visa online  through an MY VISA ONLINE TRAVEL AGENCY . It is recommended to apply for a visa within 30 days of your arrival in Singapore. 

The processing time for a Singapore visa is usually 3 to 5 working days, but some applications may take longer. The visa validity is up to two years, and the stay period is up to 30 days.