Perpetual SIP
A perpetual SIP is a Systematic Investment Plan registered without a specified end date, continuing indefinitely until the investor explicitly cancels or modifies it, requiring a valid auto-debit or e-mandate from the bank that must be renewed as per NPCI guidelines, and representing the recommended setup for long-term wealth accumulation.
When an investor registers an SIP, most AMC platforms and fintech apps offer the option to set either a fixed number of instalments (say, 60 instalments for a 5-year SIP) or select a 'perpetual' or 'ongoing' option with no end date. Choosing the perpetual option means the SIP will continue to debit and invest each month until the investor consciously cancels it — making it the default, 'set and forget' approach favoured for long-term goals like retirement or child education.
The back-end mechanism for perpetual SIPs relies on the NACH (National Automated Clearing House) mandate system operated by NPCI. When an SIP is registered, a mandate is set up with the investor's bank authorising the AMC (or its collection bank) to debit a specified maximum amount on a recurring basis. NACH mandates registered after November 2019 are linked to the bank account holder's AADHAAR or net banking authentication, providing enhanced security. Importantly, NACH mandates have validity periods — typically 10 years — and require renewal before expiry. Investors with older mandates (registered pre-2019) may face SIP failure if mandates expire without renewal.
A common practical issue with perpetual SIPs occurs when investors change bank accounts. The SIP mandate is tied to the original bank account, and if that account is closed or deactivated, the SIP will fail with an ECS/NACH rejection. Investors must proactively register a new mandate with their new bank account and link it to the existing SIP folio. Most platforms allow mandate updates through a digital process, but physical forms may be required by some AMCs or RTAs.
Perpetual SIPs also create estate planning considerations: if an investor with a perpetual SIP passes away without proper nomination on the folio, the SIP may continue debiting the account (if bank access is maintained by joint holders or nominees) even as the mutual fund units accumulate without clear ownership. SEBI's 2022 nomination mandate was partly aimed at addressing the backlog of folios with unclear succession arrangements.
For investors approaching financial goals, transitioning from a perpetual SIP to a time-bound SIP (with a specified end date aligned to the goal horizon) provides cleaner financial planning discipline and ensures the SIP terminates naturally when the corpus target is met.