Advanced SIP Concepts ~5 min read

Perpetual SIP

A Perpetual SIP is a Systematic Investment Plan set up without a specific end date. Unlike time-bound SIPs that run for a fixed period (say 5 or 10 years), a pe...

Definition

Perpetual SIP

A Perpetual SIP is a Systematic Investment Plan set up without a specific end date. Unlike time-bound SIPs that run for a fixed period (say 5 or 10 years), a perpetual SIP continues indefinitely until the investor explicitly stops or cancels it.

In Simple Words

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When you set up a SIP, you usually specify a start date and end date. A perpetual SIP has a start date but no end date — it runs "forever" (until you cancel). This is ideal for long-term wealth building because it removes the mental friction of renewing SIPs and ensures continuous compounding.

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No End Date

Runs indefinitely until you choose to stop it

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Continuous Compounding

Uninterrupted growth without renewal gaps

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No Renewal Needed

Eliminates the hassle of re-registering SIP every few years

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Auto-Debit Forever

Money is debited automatically each month — just set and forget

Real-Life Scenario

Sunita's Perpetual SIP vs Fixed-Tenure SIP

Sunita started a ₹5,000/month perpetual SIP in 2010 and never had to renew. Let us compare her outcome with a fixed-tenure SIP investor who faced renewal gaps.

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Sunita

Long-term investor with a ₹5,000/month perpetual SIP started in 2010 at 12% CAGR

Milestone	Perpetual SIP	Fixed 5-Year SIP (with gaps)
2010-2015 (Year 1-5)	₹3,00,000 invested	₹3,00,000 invested
Renewal Phase	No action needed	2-month gap during renewal
2015-2020 (Year 6-10)	₹3,00,000 more invested	₹2,90,000 (missed 1 month)
Renewal Phase	No action needed	1-month gap during renewal
2020-2025 (Year 11-15)	₹3,00,000 more invested	₹2,95,000 (missed 1 month)
Total Invested	₹9,00,000	₹8,85,000
Portfolio Value (2025)	₹25,48,000	₹24,10,000

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Key Insight: Sunita's perpetual SIP ran for 15 years without any intervention. The fixed-tenure investor missed 4 months across two renewal periods, resulting in approximately ₹1.38 Lakh less in final corpus. Perpetual SIP eliminates renewal friction entirely.

Key Points to Remember

What Makes This Important

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No end date — runs until explicitly cancelled by investor

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Removes the hassle of SIP renewal every few years

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Ideal for open-ended goals like wealth creation

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Ensures continuous compounding without breaks

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Most AMCs default to perpetual SIP if no end date specified

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Can be stopped anytime without penalty

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Auto-debit mandate may need periodic renewal (every 5-10 years)

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Combine with step-up for maximum long-term impact

Worked Example

Step-by-Step Calculation

// step-by-step calculation

Sunita's Perpetual SIP: ₹5,000/month at 12% CAGR starting 2010

Year 5 (2015): Invested ₹3,00,000 → Corpus ₹4,12,432
Year 10 (2020): Invested ₹6,00,000 → Corpus ₹11,61,695
Year 15 (2025): Invested ₹9,00,000 → Corpus ₹25,48,000

Wealth multiplier: 2.83x (₹25.48L on ₹9L invested)
Returns earned: ₹16,48,000

If she had missed even 4 months due to renewal gaps:
Missed investment: ₹20,000
Lost compounding on those months: ~₹1,18,000
Total impact: ~₹1,38,000 lower corpus

FAQs

Frequently Asked Questions

You can stop a perpetual SIP anytime through your AMC or mutual fund platform. There is no penalty for stopping. Simply cancel the SIP mandate and the auto-debit will cease.

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