About BondLab

Most bond calculators, screeners and guides in India are published by companies that earn a spread when you buy. The tools are usually honest. The incentives just aren't yours, and you can see it in what gets explained and what gets skipped.

BondLab has no bonds to sell. The calculators use the conventions the institutional market runs on (30/360 day counts for G-secs, SEBI's Actual/Actual for corporates, street-convention YTM, post-tax XIRR under current FY rules), and everything is free. There's no reason here to shade a number.

Who runs it

BondLab is built and maintained by Prakhar Choudhary. I spent about two years in BlackRock's systematic fixed income group (as an intern, then an analyst) before heading to the University of Toronto's MScAC program. That experience is a big part of why the bond math here is done the way the institutional market does it. You can see my background on LinkedIn.

What BondLab is not

• Not investment advice. We are not SEBI-registered as an investment adviser or research analyst, and nothing here recommends any security. The tools compute; you decide.
• Not a broker or OBPP. We hold no inventory and execute nothing.
• Not error-proof. Conventions have edge cases and tax law changes every budget. Every page shows its last-reviewed date. If you find an error, tell us; fixes usually go out within days.

How the site sustains itself

Ads may appear, and some outbound platform links may become referral links, always disclosed on the way through. Referral fees don't change what the analysis says. If they ever did, the links would be the thing to go.

The roadmap

Next up: an independent bond screener over exchange trade data, and email alerts for public NCD offerings. (The yields dashboard and issue tracker started as roadmap items too.) If you want one of these sooner, say so. Requests decide the build order.