Skip to main content
If your gains suddenly look way too high, you’re probably missing purchase history somewhere. KoinX can see that you sold or swapped a coin — but it can’t see where that coin originally came from. And when that happens, it assumes a zero cost basis, which inflates your gains. That’s exactly what the Reduce Taxable Gains insight is pointing out.

​
What Does This Mean?

Screenshot2026 03 27at3 57 20PM
This happens when KoinX detects Insufficient Quantity. In simple terms: KoinX sees a sell, swap, or transfer-out, but cannot find enough buy/deposit history for that asset. Because of this:
  • Cost basis = 0
  • Full sale value is treated as gain
  • Your profits look inflated
KoinX can only calculate correct gains if it has complete acquisition history — buys, deposits, rewards, and transfers.

​
Where Can You Check This?

You can directly identify affected transactions from the Transactions page.
1

Go to Transactions

Open the Transactions page from the sidebar.
2

Apply warning filter

Select: Warnings → “Can’t find purchase transactions”
3

Review affected entries

These are the exact transactions where KoinX is missing acquisition history.

​
Why This Matters

Crypto tax is calculated as: Sale Value – Cost of Acquisition = Gain If cost is missing: Gain = Full Sale Value Which means:
  • Gains are overstated
  • Tax appears higher
  • Your report may be incorrect
Do not generate your final tax report until these issues are fixed. Missing cost basis can significantly impact your tax calculation.

​
How “Reduce Taxable Gains” is Calculated

The number shown in Insights is not exact — it’s an estimate. Reduce Taxable Gains = 50% of gains linked to missing purchase history Why 50%? Because KoinX does not know the actual purchase price yet. Instead of guessing, it shows a safe estimate of how much your gains could reduce once the missing data is fixed.
This is a directional estimate — your actual gains may reduce more or less depending on the real cost basis.

​
Example

Let’s say:
  • You sold crypto for ₹10,000
  • But purchase history is missing
KoinX calculates: Gain = ₹10,000 (cost assumed = 0) Now in Insights: Reduce Taxable Gains = ₹5,000 (50%) Meaning: Your gains could reduce by ~₹5,000 if the purchase data is added.

​
Important: Reports vs Insights

  • Reports: Use current data → missing cost = higher gains
  • Insights: Show potential correction → estimated reduction
So: Reports = what your taxes currently look like
Insights = how much you can fix

​
How to Fix This

You don’t need to manually adjust anything — just fix the missing data.
Please follow the steps mentioned here- My cost basis is showing ₹0 — what’s happening?** **to fix it.
Most common mistake: You added the exchange where you sold the asset, but not where you originally bought it.

​
Frequently Asked Questions

No. It’s an estimate based on 50% of gains linked to missing acquisition history. The actual reduction depends on your real purchase price.
Yes. Once you add the missing data, regenerate your report to see the corrected gains.
Yes. If the asset was bought in an earlier year, KoinX won’t have the cost basis unless that data is also imported.
Yes. Missing deposits or transfer-ins are a very common reason for insufficient quantity errors.
No. You should not, as it will effect your tax amount.
Last modified on March 27, 2026