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Data-Backed Analysis

Does Your SIP Date Really Matter?

We analysed 10 years of historical NAV data across Large Cap, Mid Cap & Small Cap indices to find the "best" SIP date.

Study Period: March 2013 – March 2023  |  Monthly SIP of ₹10,000
💡

The Verdict: It Barely Matters

Across all categories, the difference between the "best" and "worst" SIP date is less than 0.15% XIRR — that's just ₹2,300 over 10 years on a ₹12L total investment. Consistency beats timing, every single time.

Large Cap (Nifty 50 TRI)
Mid Cap (Nifty Midcap 150 TRI)
Small Cap (Nifty Smallcap 250 TRI)

XIRR Returns (%) by SIP Date & Category

10-Year SIP • ₹10,000/month • Source: Scripbox / Nifty TRI Data
SIP Date Large Cap
(Nifty 50 TRI)
Mid Cap
(Nifty Midcap 150 TRI)
Small Cap
(Nifty Smallcap 250 TRI)
Spread
(Max - Min)
1st12.00%15.87%12.73%3.87%
5th12.02%15.89%12.74%3.87%
10th12.04%15.90%12.75%3.86%
12th12.05%15.92%12.72%3.87%
15th12.04%15.94%12.78%3.90%
20th12.05%15.96%12.80%3.91%
25th12.06%16.00%12.83%3.94%
28th12.06%16.00%12.86%3.94%

Large Cap — Nifty 50 TRI

XIRR range: 12.00% – 12.06%
1st
12.00%
5th
12.02%
10th
12.04%
15th
12.04%
20th
12.05%
25th
12.06%
28th
12.06%

Mid Cap — Nifty Midcap 150 TRI

XIRR range: 15.87% – 16.00%
1st
15.87%
5th
15.89%
10th
15.90%
15th
15.94%
20th
15.96%
25th
16.00%
28th
16.00%

Small Cap — Nifty Smallcap 250 TRI

XIRR range: 12.72% – 12.86%
1st
12.73%
5th
12.74%
10th
12.75%
15th
12.78%
20th
12.80%
25th
12.83%
28th
12.86%

Fund-Level: SBI BlueChip Fund

XIRR (2015–2025) • Source: ET Mutual Funds
1st
13.07%
5th
13.08%
8th
13.09%
10th
13.09%
15th
13.14%
20th
13.17%
0.06%
Max XIRR difference across SIP dates for Large Cap funds over 10 years
0.13%
Max XIRR difference across SIP dates for Mid Cap funds over 10 years
0.14%
Max XIRR difference across SIP dates for Small Cap funds over 10 years

🎯 So What Should You Do?

Practical recommendations based on the data
If You Are... Best Date Strategy Why
Salaried (paid 1st) 2nd – 5th Ensures funds are available, avoids SIP bounce
Salaried (paid 25th) 26th – 28th Invest right after salary credit
Self-employed Any fixed date Pick any date & be consistent; data shows <0.15% impact
Running multiple SIPs Spread across 5th, 15th, 25th Adds micro-diversification of NAV entry points

Why Sai Assets?

We believe financial literacy shouldn't be locked behind jargon and paywalls. Every report on this platform is built on real data, peer-reviewed metrics, and zero sales bias.

Our mission is simple — help everyday investors make informed decisions using the same analytical frameworks that professionals use.

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Data-First Analysis
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Disclaimer: All data sourced from Groww, Tickertape, Advisorkhoj, ET Mutual Funds & Scripbox (as of March 2026). All returns shown are for Direct Growth plans. Past performance is not indicative of future returns. This platform is for educational purposes only and does not constitute financial advice. Please consult a SEBI-registered investment advisor before making any investment decisions.