Declining user experience at Zerodha

Last few weeks has seen some deterioration in user experience at Zerodha, is everything alright? @nithin, what is being done to fix them? I love Zerodha and all your initiatives, am moving all my mutual fund investments to coin. Will help if you can address the issues.


Last few weeks has been a nightmare of sorts for us. We have had issues with our Bank and Backoffice which had choked the entire support system here. This had like a domino affect and hurt our response times for even the normal tickets/queries. Below is a summary and what we have done to get over it.

Issues from our banking partner HDFC
On 9th April HDFC Bank did a major update to their core banking service. When they did, their solution provided to us for fund transfer update broke. So what this meant is that if funds were transferred by a client using NEFT/RTGS/IMPS, we were not getting to know which bank account number the funds were coming from. Since we don’t know which account money is coming from, we were not able to update funds to the trading account on time. We had to manually download bank statements and cross check and update funds manually. Whenever there is manual intervention, there are bound to be errors. We get tens of thousands of fund transfers every day, the entire support system suddenly choked because of firstly delay in the fund updates on client accounts but also the errors.

This issue is behind us now. There were no issues for clients using the payment gateway. We got HDFC to give us a different report until they fix their core banking update issue. For everyone using NEFT/RTGS/IMPS, using ZERNSE/ZERMCX to transfer funds as mentioned here, will mean a faster update on the trading account.

Q related issues

Markets hitting all time highs has meant that we have seen a huge surge in the number of clients trading and also in terms of number of holdings. We suddenly realized that our earlier logic of calculating P&L’s or holding values is tough to support at this scale.

Here is one thing that I want everyone to know, P&L and holding buy value calculation is an analytic layer only. This has no bearing on the actual trading account balance or the number of shares/positions held. The actual funds or # of holdings has never been wrong till date, as it gets reconciled with the exchanges every day. P&L and holding buy average are us building another report over this to show the performance of the account. The way P&L/holding price is calculated is different compared to how the end of trade process happens to determine ledger balance. If you do P&L based on only ledger entries, it will match 100%. But since P&L’s are done based on trades, the mismatch can happen - not just for us but across brokers (especially when there are corporate actions on underlying stocks or stocks transferred in from another broker).

Some of the things that have backfired with Q, which we had done with the intention to help clients

  • Ability to add buy average price for stocks transferred from another demat to us (we are the only ones in India who allow this). When this price is entered, we create an artificial trade of sorts in our tradebook database. When this is entered, we have to go back in time and recalculate the holding buy average price and P&L.
  • The way we calculate holding buy average price or P&L using FIFO. What this means is that when you sell something, the stocks held first are removed, to show the latest average price. This is the right way to do it, even for taxation purposes. All brokers that I know of just do a simple average of everything bought till now to determine buy average. What this means for us is that, everyday we have to look at all the 1 million + lines of holdings with us and go back in time to apply FIFO.
  • Most brokers give P&L only for a financial year or for between a period within the year. Makes life very simple as the load on their database drops significantly. With us, we are allowing to pull P&L reports for multiple years. (even ur bank and credit card statements without any P&L calculation have a time limit that you can pull for).

Similarly a lot of these features/reports on Q, that worked well when we were smaller, started behaving weirdly with the surge of business this year and completely fail for few weeks. What has made it worse for us is that we rely on a vendor (HarsaIT when we started the business, they got bought over by Omnesys, Omnesys got bought by Thomson Reuters) for the backend trade process and they have done a horrible job supporting us to handle scale.
For now, Q issues have been sorted by us moving into a mega-powerful server (we have removed some of the reports which aren’t essential). We have been working on Crux (in-house trade process platform) for over 18 months. This has taken us much longer than anticipated. We have started replacing the backend bits from our old vendor to the in-house tool (crux). Once done we will launch new Q with much better reporting. The way crux has been built is that we will soon be able to support everything that we had originally envisioned along with things like instant fund withdrawal requests, turn Q into a trading journal, pre-calculated P&L’s, much better visualizations, and more.

These are not excuses, I know that as a client you don’t really care for what is causing the issue, you’d expect us to take care of these and ensure that you get top notch service. I want to assure you that we are all slogging our butts to make sure that you get the best experience trading at Zerodha.


This is the thing which differentiate Zerodha from the others and always keeps Zerodha at Top


Hi @nithin I started trading with Zerodha a couple of months ago. I admire the hard work your team has put into crafting these wonderful platforms. Having said that as a trader even small glitches can mean the probability of me taking a financial hit is higher. So what I wanted to know is

  1. What is a loose time-line for Crux, because I remember you mentioning it in your taxation video.
  2. I understand as a broker you don’t control all the pieces, but what are you doing about Omnesys, your back-end vendor?
  3. If you are not able to support such complex calculations at scale, will the new system be able to handle it? because I would love to keep getting my historical P&L reports and more.

Would appreciate your views on this and thank your for your candid reply about the issues these past few days.

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  1. It is taking longer than it should have. Hopefully in the next 4 weeks we should have replaced most of it.
  2. As I have mentioned above, we are bringing this in-house so that we don’t rely on any external vendor.
  3. Yes, you will get all the reports and more. We have learnt now from experience what is required to support these reports.

All the best Mr. Kamat. Eagerly awaiting new updates.

I personally admire entrepreneurship as it represents life to me. Creating something new. However, I don’t like unnecessary secrets. Users are the biggest stakeholders of the company and as such some level of transparency must be maintained. Business means following a set number of rules/steps and repeating them over and over again in same order as they are set. If any of the step breaks, the whole machinery may be jeopardized to the extent of being non-functional.

I took all your points and appreciate for what you as a team are doing. Only if we know about the problems, we can brace for it by planning ahead. Talking of plans, no plans are full proof and even army has 2nd and 3rd plan, if the first one fails. So while you are at it, don’t assume deadlines are going to be met, as you yourself experienced it.

I like zerodha very much. And with success, expectations rise up too. Which creates big problems when they are not met. So if you let your users (stakeholders) know of the problems, they will be more than happy to accommodate you. This will also ease pressures on you and let you focus on core problems. Although, I was not told, I had experienced changes when I updated my HDFC bank passbook. And in the back of my mind I always attributed all the problems to it. However, upfront information always helps in keeping the guessing work away.

I guess, money transfers are core of this service and being told upfront of the changes would have helped a lot of traders. Now that I know, I will try to time my activities accordingly and not be mad at support all the time.

I hope and am sure zerodha will come out much stronger than before.

P.S. Are there any plans to allow MCX traders to withdraw and get their funds on Saturday as it causes a lot of discomfort in moving funds in and out of the system. Many brokerage houses support this, why can’t Zerodha?

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We are working hard to move our backoffice platform from vendor to in house. Once that is done, our next big bit is to process instant payout 24/7/365.


very good bro goood lucck.:blush:

@nithin @NithinKamath,

Do we have a date yet for the release of crux?It is almost 1 year since its taken offline.Can you please provide an update on this?

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@BharatW @NithinKamath

When is the CRUX project being released.Visualization of trades across different time frames was really good when it was there.Dearly missing it.