To start a SIP offline, an investor must first have a bank account and select a mutual fund scheme that matches their investment goals. The investor then fills out an application form providing details like name, address, SIP amount, tenure and the selected scheme. They also complete KYC formalities and submit the required documents along with payment. Finally, the investor receives confirmation of payment and units in the scheme. Some of the largest mutual fund houses in India for SIPs include ICICI Prudential, HDFC, Reliance, Birla Sun Life, SBI, UTI, Kotak Mahindra, Franklin Templeton, DSP BlackRock and IDFC.