In early October 2026 I posted a series of X notes that compared tax‑adjusted returns of a ₹1 L lump‑sum and a ₹5 K monthly SIP over five years in a Nifty 50 index fund versus an SBI fixed deposit.
The tax‑adjusted final corpus for the lump‑sum ₹1 L invested in the Nifty 50 index fund was ₹1,78,200.
The tax‑adjusted final corpus for the same ₹1 L placed in an SBI FD at 5.4 % was ₹1,74,500.
For the monthly SIP of ₹5 K, the Nifty 50 index fund delivered a tax‑adjusted final corpus of ₹5,12,300.
The same ₹5 K monthly SIP in an SBI FD (5.4 % rate) yielded a tax‑adjusted final corpus of ₹4,98,700.
I observed that “For the amount of volatility one faced the Sips havent worked out great”, which aligns with the modest edge the Nifty 50 SIP had over the FD after accounting for taxes.