SDLs: The Yield Pickup Almost Nobody Talks About
Ask a retail investor to rank Indian fixed income by safety and they’ll say G-secs, then draw a blank. One rung down sit State Development Loans, the bonds of Indian state governments, and they may be the most underrated instrument available to conservative investors. Near-sovereign credit mechanics, a multi-decade record of zero missed payments, and a yield pickup over G-secs that has recently run around 65–80 bps at the 7 to 10 year point, which survives mostly because nobody markets SDLs to you.
What an SDL is
States fund their deficits by auctioning bonds through the RBI, using the same weekly auction machinery as G-secs (SDLs usually on Tuesdays). Same ₹100 face, same semi-annual coupons, same 30/360 day count, and tenors commonly around 10 years though they range widely. A typical name reads “7.45% Maharashtra SDL 2035.”
The credit question, answered honestly
Are states as safe as the Centre? Legally an SDL is the state’s obligation, not the Union’s, so no, not identical. In practice three mechanisms have kept SDL defaults at zero:
- The RBI is the states’ banker and debt manager. SDL payments are serviced through accounts the RBI itself administers.
- There’s a structural backstop. States maintain funds with the RBI (the Consolidated Sinking Fund and Guarantee Redemption Fund), and the RBI can appropriate central transfers due to a state to meet SDL obligations. That’s the practical reason the payment record stayed clean through every state fiscal wobble, COVID included.
- Political economy. An SDL default would reprice every state’s borrowing overnight, so the system is heavily incentivised never to let the first one happen.
The market’s verdict is a spread over G-secs, and it has been widening. At the auction of 21 July 2026, Assam’s fresh 10-year cut off at 7.56% against a 10-year G-sec near 6.82%, a pickup of about 74 bps. Delhi’s 7-year came at 7.31% against 6.66%, about 65 bps. For most of the past few years the same spread sat closer to 25–40 bps.
The driver is supply rather than credit: states have been borrowing heavily, and bank demand hasn’t kept pace. Public sector banks have gone as far as asking the RBI to include state paper in its open market purchases.
Two things follow. The pickup is better than the folklore says right now, and it is not a fixed property of the instrument, so check recent auction cut-offs rather than trusting any number written down, including this one. The spread also varies by tenor: it has been widest around 7 to 10 years and thinner past 20, where the G-sec curve itself is steep.
Is the pickup worth it?
On a ₹10 lakh, 10-year holding, 70 bps is about ₹7,000 a year, or ₹70,000 over the life, for credit risk that has never once produced a missed coupon. At the 30 bps that prevailed until recently it was closer to ₹3,000 a year, which tells you how much the answer moves with the spread. Two honest caveats.
Liquidity is the real cost. SDL secondary volumes run thinner than benchmark G-secs, and selling a random state’s 2035 bond mid-life takes patience. This is hold-to-maturity money, which is precisely what ladder rungs are for.
State selection matters less than you’d expect, since the payment mechanics above are common infrastructure. Liquidity does favour the frequent large issuers, so Maharashtra, Tamil Nadu, Karnataka, Gujarat and UP trade more easily. Buying at auction sidesteps most of the entry-side liquidity problem anyway.
Taxation
Identical to G-secs. Coupons at slab with no TDS for resident individuals, and capital gains at 12.5% if you bought below par and held beyond 12 months. Full rules here. The FD vs bond calculator treats SDLs as the “G-sec/SDL” bond type.
How to buy
Same RBI Retail Direct workflow as G-secs: non-competitive bids at the weekly SDL auctions from ₹10,000, allotment at the weighted-average yield, coupons landing in your bank automatically. The portal’s auction calendar lists which states are borrowing each week, and you’ll usually have several to choose from, occasionally with meaningful cut-off differences between states in the same auction. Check any secondary-market quote against the YTM calculator before paying up.
Where SDLs fit
They work best as the middle and long rungs of a ladder, where they’re a straightforward upgrade over G-secs for hold-to-maturity money: same admin, extra coupon. For a retiree’s income book, a 10-year SDL bought at auction is about the cleanest pension brick retail India can buy.
They’re wrong for trading, for short-horizon parking (use T-bills instead), and for anyone who might need to sell in a hurry.
FAQ
Have SDLs ever defaulted? No missed SDL payment in the modern era. It’s the record most retail investors assume bank FDs have.
Why do yields differ between states? Supply calendars, fiscal headlines and liquidity. Spreads between states usually run in single-digit bps, because the market mostly prices “SDL” as one asset class.
SDL index funds exist. Better than direct? SDL and G-sec target-maturity funds give you a diversified wrapper with the usual TMF trade-offs: expense ratio, approximate rather than exact maturity value, slab taxation. Direct auction SDLs win for goal-dated money, funds win on convenience.
Are they guaranteed by the central government? No. See the credit section above. “Near-sovereign by mechanism, not by guarantee” is the accurate description.
Educational content, not investment advice. Tax rules current for FY 2026-27 to the best of our knowledge, but verify with a professional before acting. See the full disclaimer.