Well, you need not worry as your SIP would remain active even if you missed 1 or 2 installments due to insufficient amount of balance in your bank account.
When you miss an SIP due to insufficient funds, all that happens is that you miss your SIP installment for that month. The fund house wouldn’t penalize you for missing the installment neither your SIP becomes inactive. But your bank may penalize you for not maintaining sufficient funds for auto-debit mandate through Electronic Clearing Service (ECS).
Even if continuously one or two SIP’s is bounced, on consecutive month the investor’s bank only gives that particular amount not the whole bounced amount to the mutual fund company
Important – In case 3 consecutive SIP transactions fail, then it would be considered that you aren’t willing to invest further and the SIP would be liable for cancellation