Every SIP investor has asked this question at least once.
"What's the BEST date of the month to start my SIP?"
1st? 5th? 10th? Right after F&O expiry?
There's a whole cottage industry of WhatsApp forwards on this.
Turns out, it doesn't matter. At all.
WhiteOak Capital ran the numbers on BSE Sensex TRI from August 1996 to May 2026.
They checked 10-year rolling SIP returns for every single date of the month.
The spread between the best date and the worst date?
👉 0.06 percentage points.
That's it. That's the edge.
🥇 Best date average return: 13.42%
🥉 Worst date average return: 13.36%
🤷 Difference: basically a rounding error
The pattern (or lack of it) is almost funny.
📅 First week SIPs → 13.37% to 13.40%
📅 Mid-month SIPs → 13.39% to 13.40%
📅 Month-end SIPs → 13.41% to 13.42%
A wafer-thin tilt toward month-end. Nothing you'd plan a life around.
And that obsession with dodging F&O expiry volatility?
Pure noise over a 10-year horizon.
Three friends. ₹10,000 a month. 10 years. ₹12 lakh invested each.
🧍 Investor A → full amount on the 5th
🧍♀️ Investor B → full amount on the 20th
🧍♂️ Investor C → ₹5,000 on the 5th + ₹5,000 on the 20th
Final corpus for all three? Roughly ₹24 lakh.
Difference? A few thousand rupees. After a decade.
You could earn that back by skipping two Swiggy orders.
Not the date. Not the hack. Your behaviour.
🚀 Start early
🪨 Stay invested through ugly cycles
📈 Step up the SIP as income grows
🛑 Don't pause when markets crash
🔁 Just don't break the chain
WhiteOak's verdict on the "perfect" SIP date is beautifully boring:
"The best SIP date is when the investor usually receives money in their bank account."
Translation: the day your salary lands.
Because money that sits in your account too long… mysteriously disappears into food deliveries, weekend plans, and that one sneaker sale.
India is now pumping a record ₹32,000+ crore into SIPs every single month.
Millions of investors. One obsession. The "right" date.
But 28 years of Sensex history is whispering the real secret:
Wealth isn't built by timing the SIP.
It's built by not stopping it.
That's all for now!
