Later, after he relocated to Delhi with his family, he graduated from Delhi University through the correspondence program. In 2001, Kher left New Delhi for Mumbai, the epicenter of India’s highly competitive music industry, to seek his fortunes as a professional singer. For a while, Kher struggled, living in cheap residence, hostels and eking out whatever musical work he could find to make ends meet.
The ray of hope in Kailash’s life came when he met music director Ram Sampath and he gave Kailash an opportunity to sing Jingsal in the ad. His foray continued by singing jingles for TV and radio commercials, receiving critical acclaim for his unique style of singing. Some of the brands that he sang commercials for are Coca-Cola, Citibank, Pepsi, IPL and Honda Motor Cycles.
Kailash had to struggle to get a chance in Bollywood. He got opportunity to sing a song for the movie Andaaz. In this movie his song “Rabba Ishq Na Hove” became much popular. His song “Allah ke Bande” from the obscure movie Waisa Bhi Hota Hai Part II became very popular and this song made him a popular singing star in Bollywood.
He has sung more than 700 songs for Bollywood. He is a prime candidate amongst the contemporary Sufi singers. He had sung in more than 20 Indian languages including Malayalam, Tamil, Telugu, Kannada, Oriya, Bengali, Sindhi, Bhojpuri, Gujarati, Marathi, Punjabi, Konkani, Rajasthani etc.
He lend his voice to the Clean India Mission theme song, ‘ Swachha Bharat Ka Irada Kar Liya Humne’, the national campaign for cleaning India. He also composed the song “Ambar Tak Yehi Naam Gunjega” for Anna Hazare anti corruption movement, and sang it in Ramlila Maidan during Anna Hazare protest.