Honestly, this is one of the most confusing corners of Indian taxation right now and even many CAs are giving different answers, so you're not alone.
Let me break down what we actually know vs what's still murky.
First, the maturity exemption. The tax-free status on RBI maturity redemption — that benefit is tied to the bond itself, not to whether you were the original subscriber. So if you hold your secondary market SGB all the way to the RBI maturity date, the redemption proceeds should still be exempt from capital gains tax. This is the general understanding, and CBDT hasn't specifically carved out secondary market buyers from this exemption. Your CA should be able to confirm this but most are aligned on this point.
Now, selling before maturity on NSE or BSE — this is where it gets messy after the Finance Act 2024 changes.
Pre-Budget 2024, listed bonds sold on exchange after 12 months attracted 10% LTCG without indexation. Post-Budget 2024 (applicable from July 23, 2024 onwards), that shifted to 12.5% without indexation for listed securities. SGBs traded on exchange fall under listed securities. So if you bought on secondary market and sell on exchange, you're looking at 12.5% LTCG if held more than 12 months, or STCG at your slab rate if sold within 12 months.
The thing most people get wrong — they assume indexation benefit still applies to SGBs sold before maturity. It doesn't for exchange transactions post July 2024. Indexation was relevant only for unlisted debt earlier, and SGBs are listed.
Here's the practical thing to watch: the April 2026 buzz is mostly about debt mutual fund taxation comparisons and some Budget speculation, not a specific SGB rule change that's confirmed. Don't make decisions based on rumours.
My honest recommendation — hold to maturity if you can. The tax-free exit at RBI redemption is genuinely valuable, especially given the 2.5% interest you're earning on top. If you're in the 30% bracket, that interest is taxed as income, yes, but the maturity gain being zero-tax is a big deal. Don't trade in and out of the exchange tranche unless you have a strong reason.