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Blue bonds are debt instruments raising capital for ocean and water-related projects, such as coastal infrastructure, sustainable shipping, and marine conservation. Under SEBI Regulations, they are classified under ESG debt securities, offering Indian fixed-income investors market-linked returns while funding the sustainable blue economy
India is all set to issue its first blue bond, and for any of you who have been keeping up with the sustainable finance space, this is a pivotal moment. We’ve already talked about blue bonds in our article, and this one picks up from where it ended, providing a peek into the current scenario and walking readers through the next steps: how to invest, how much, the risks, and taxation.
India’s Blue Bond Market: Where Things Stand Right Now
The blue bond scene in India is still in its infancy, but here’s where things stand: Sagarmala Finance Corporation, a state-owned maritime lender, is gearing up to issue the country’s inaugural blue bond. We’re talking about a base issue of ₹500 crore, with a potential additional ₹500 crore greenshoe option, which could take the total to ₹1,000 crore. This bond’s got a 10-year lifespan and is specifically designed for ESG-focused investors looking to get in on India’s maritime infrastructure action.
That’s the key thing to keep in mind: blue bonds in India are still a relatively new, untested concept. We’re talking about one institutional issuer, not a full-fledged, liquid market. For perspective, globally, only about $15 billion in blue bonds had been issued by mid-2025, according to World Bank data, which is pretty small compared to the broader green or sustainability bond universe.
With the tenor and rate not yet finalized and no launch date set in stone, investors might have to wait before they can jump on the blue bond ship. According to L.V.S. Sudhakar Babu, the MD of Sagarmala Finance, the issue will likely happen when the market is looking up and yields have stabilized.
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How Can Indian Investors Access Blue Bonds?
So the Sagarmala blue bond—expected to be a privately placed non-convertible debenture, by the way—will probably be accessed in a pretty familiar manner, similar to other institutional-grade bonds in India. You’ll likely have a few options:
- SEBI-registered Online Bond Platform Providers (OBPPs): Platforms like GoldenPi, which list bonds from both primary and secondary markets. They offer a seamless, end-to-end digital experience, with all the details you need, from yield to credit rating to maturity.
- Secondary market on NSE/BSE: Once listed, the bond can be traded on exchanges through your existing demat and trading account.
- Direct institutional route: Large ticket investors (mutual funds, insurance companies, pension funds) will likely get primary allocation.
SEBI made a significant change in 2024, reducing the minimum face value for privately placed NCDs from ₹1 lakh to ₹10,000, which is huge, because it means retail investors might actually be able to access this bond at a much lower entry point than they could in the past.
One key thing to consider, though: blue bonds in India are part of the broader ESG debt landscape. SEBI’s ESG Debt Framework brings in some structured regulatory requirements for ESG-labeled bonds, including mandatory third-party verification and post-issuance reporting. That adds a layer of accountability, which is great, but it also means there’s more compliance documentation to go through before you invest.
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Returns on Blue Bonds in India
Blue bonds don’t come with a fixed yield. It’s all about the issuer’s credit score, how long the bond’s for, and what the market’s like. Here’s a practical breakdown:
| Instrument | Credit Profile | Indicative Yield (approx.) | Tenor |
| 10-year G-Sec | Sovereign | 7.1% | 10 years |
| AAA PSU Bond | Near-sovereign | 7%-7.5% | 5-15 years |
| Sagarmala Blue Bond (expected) | AA+ (CARE & India Ratings) | 7.2%–7.6% (est.) | 10 years |
| AA Corporate Bond | Investment grade | 7.5%-8.5% | 3-10 years |
SMFCL’s got a pretty solid AA+ credit rating from CARE and India Ratings — we’re talking second-highest investment grade, right up there with the top PSU bonds. With that kind of rating, you can expect the blue bond returns to come in at a slightly higher rate than the 10-year G-Sec, probably somewhere between 7.2% and 7.6%, though we’re still waiting on the final coupon details. Here’s the thing: you’re not going for the highest yield possible; you’re essentially trading a tiny bit of extra return for the chance to make a real impact.
Key Risks to Understand Before Investing
Blue bonds are pretty similar to regular bonds, risk-wise, but there are some extra things to consider:
- Liquidity risk: Since they’re a new thing in India, the secondary market’s gonna be a bit shallow at first, especially compared to those super liquid G-Secs or well-established PSU bonds. So, if you need to exit before maturity, be prepared to take a hit on the price.
- Credit risk: Even though the rating of Sagarmala Finance is strong (AA+), it is not sovereign. It is a young NBFC, which was given the NBFC license in June 2025. The track record is too short to make any estimated guesses.
- Interest rate risk: A ten-year term will expose your bond to interest rate fluctuations in the market. Rising fears of a US-Iran war have weighed on bond market activity, making issuers more cautious to price, thereby elevating India’s benchmark 10-year yield by around 50 basis points since the beginning of the conflict. An increase in yield after purchase will cause the bond’s market value to decline.
- Asset-liability mismatch at the issuer level: Sagarmala’s existing term loans have an average tenor of 3.5 years, whereas the average tenor of loans disbursed is around 12 years, leading to an asset-liability mismatch. This is a mismatch being partly remedied by the blue bond, which makes sense but is a structural weakness that should be noted.
Taxation on Blue Bonds
Blue bonds are essentially treated like any other corporate NCD when it comes to taxes. Two main things to consider are the following:
- Interest income: The coupon payments will be considered as part of your overall income and will attract tax at your slab rate. For interest on bonds, TDS is 10% as per section 193 of the Income Tax Act and 20% if no PAN is provided.
- Capital gains (if sold before maturity): For listed bonds, if held for 12 months or more, the gains will be treated as LTCG and taxed at 12.5% without indexation. If held for less than 12 months, they will be treated as STCG and taxed at the applicable slab rate.
The bottom line: The post-tax return on a 7.3% blue bond becomes approximately 5.1% for someone in the 30% tax bracket. Be aware of this when comparing with fixed deposits or tax-free bonds in the secondary market.
Should You Consider Investing
Blue bonds are most suited for:
- Investors who have an existing allocation to PSU bonds or infrastructure bonds who seek a thematic ESG label on a similar risk profile.
- HNIs or institutional mandates with ESG compliance requirements.
- Long-horizon investors who are willing to invest for at least 10 years and who are willing to have lower secondary market liquidity.
For those looking to just focus on yield, there are higher-yielding options in the AA corporate bond sector. Three factors make for a good pitch for a blue bond: reasonable safety, ESG alignment, and being part of an emerging asset class at an early stage.
Frequently Asked Questions
In a blue bond, you receive a fixed exposure to a specific issuer and specific projects at a fixed yield. With an ESG mutual fund, your money is combined with those of many other investors in numerous securities and provides more liquidity, but it dilutes the impact link. Blue bonds are better for investors looking for defined income and targeted exposure; ESG funds are better for liquidity and diversification.
The Sagarmala Finance Corporation is not a government entity but instead a government-owned NBFC. It does not have a specific sovereign guarantee. The AA+ rating indicates good credit quality, but the ability to repay depends on Sagarmala Finance’s own credit performance and not the government’s balance sheet.
Not exactly. Both fund environmentally focused projects, but green bonds cover a wider range: solar, wind, energy efficiency, and more. Blue bonds are focused on ocean, coastal, or water-related activities, including ports, inland waters, and marine conservation.
This hasn’t been confirmed yet, but given that SEBI reduced the minimum NCD face value to ₹10,000, access should be meaningfully lower than older PSU bond offerings.
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