A standing instruction (SI) is an automatic recurring payment order you give to your bank. You tell the bank: "Transfer $500 to this account on the 1st of every month" — and the bank does it automatically until you cancel. No manual intervention needed.
Common uses: paying rent, loan EMIs, insurance premiums, utility bills, and SIP investments. Instead of remembering due dates and making manual transfers each month, the standing instruction handles everything. Miss a payment? Your credit score and relationships suffer. Standing instructions prevent that.
Standing instructions differ from auto-debit mandates. With SI, you instruct your bank to push money out. With auto-debit, you authorize a third party to pull money from your account. Both serve similar purposes but have different control mechanisms and authorization requirements.