I built a tool to help Zerodha investors reduce capital gains tax – looking for feedback

Taxation
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Hey folks,

I built a tool called TaxHarvestLab because I ran into this problem myself:

Most Indian retail investors don’t actively plan their capital gains tax. Typically we either:

  • forget to book LTCG within the ₹1.25L exemption
  • miss obvious loss-harvesting opportunities
  • or end up doing messy, manual calculations at ITR time

By the time we realize, the financial year is already over.

What this tool does

The tool takes your broker reports (Zerodha for now):

  • Tradebook (last 12 months)
  • Holdings
  • Tax P&L

And tells you, as of today:

  • exactly which stocks/ETFs to sell
  • how much quantity of each
  • how much tax you’ll pay if you sell now
  • how much you can legally save through tax harvesting

So instead of abstract numbers, you get actionable instructions.

How this is different from Zerodha’s tax harvesting report

Zerodha’s report is useful, but it’s only at an aggregate level.

It does not tell you:

  • which specific stocks to sell
  • how many units of each
  • what the exact post-sale tax impact looks like

In short:

  • Zerodha answers: “How much can I save?”
  • This tool answers: “What exactly should I sell to save it?”

Taxharvestlab

2 Likes
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Very useful, thanks! :rocket:
Can’t test it out as there are no losses to offset this FY, maybe next year! :smiling_face_with_tear:

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There is no reason why someone should upload their personal zerodha tradebook, holdings, and tax P&L to an unverified tool. no privacy policy, data deletion guarantees, or security audits mentioned. rather stick to official zerodha reports + manual calc for tax harvesting. don’t be fooled by random developers. potential misuse, data breaches or resale.

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what about others? who is tax harvest guy? are they registered? where are the licenses?

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They don’t need to register anywhere for this service. I’m skeptical with this these kind of services too, but I don’t think there’s anything wrong with the website, if they indeed adhere to their own privacy policy.

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Hey, @livepositionaltrader thanks for taking the time to comment. I understand the concerns related to privacy and it’s essential especially with financial information. I’m the developer, you can checkout my profile at https://ronitjain.in/

The tool is designed to make the calclautions on RAM and dispose off the data. If you reload, you’ll need to provide the data again to see your dashboard.

Also, you don’t necessary need to use the tool, there’s a cool explaination use-cases page that explain things if you wanna do stuff manaully Capital Gains Tax Scenarios India | LTCG STCG Examples | TaxHarvestLab | TaxHarvestLab

I’ll try to if there are more ways I can mitigate the security/privacy concern, open to feedback and suggestions for improvements in this and all other fronts.

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Haha, no losses is a good thing :rocket: :smile:

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Open sourcing the main optimization engine with option to run completely locally.

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Hm, :thinking: yeah.that does help the people willing to run it locally.

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Redact your personal info before uploading it. :point_left:
The trades themselves are meaningless without your personal details like client ID, name, or PAN. :four_leaf_clover:

@Ronit_Jain I’m getting a not-so-helpful error:

Errors
Analysis failed
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Exactly! Just remove or redact personal information in the downloads from Zerodha. I was thinking of this and trying it out.

Zerodha had been tweaking this and I’m not very confident on the figures it shows. As it stands, the Zerodha tax loss harvesting report is not useful. It may result in harvesting losses and having huge capital gains. What I’m looking for is the exact list of stocks (based on FIFO) where I can harvest some losses and how much of which stock I should sell. I’ll try your site out. Thanks for making this.

I do have one question: what’s the planned business model for this site?

1 Like