Fix for missing historical market prices in CryptoTax.be. How to enter prices manually and correct your tax calculation.
How to handle missing historical price data in CryptoTax.be
What is the problem
For the tax calculation, CryptoTax.be needs the market value in euros at the time of each transaction. For most major coins (BTC, ETH, etc.) the system has access to historical price data. For less well-known or newer coins that data may be missing.
If the price at the time of a transaction is not available, CryptoTax.be marks that transaction with a warning.
a transaction with a warning for missing price data
How to resolve it
Step 1: View the transactions with missing price
Go to Transactions and filter on Missing price data or look for transactions with a warning icon.
Step 2: Look up the historical price
Look up the market price of the coin in question on the date of the transaction yourself. Useful sources:
- CoinGecko (chart > select date)
- CoinMarketCap (historical data)
Note the price in euros (EUR) at the specific date and time of the transaction.
Step 3: Enter the price manually
- Click on the transaction with the missing price.
- Click Edit.
- Enter the price in euros per unit at the time of the transaction.
- Save.
the transaction edit screen with the field for the price per unit
If the coin was never traded on an exchange
For tokens that were never publicly traded (e.g. early ICO participants), no market price is available. In that case:
- Use the ICO price as the cost basis
- Document the value used carefully
- Consider consulting a tax adviser
Prevention
If you make transactions in less well-known tokens in the future, record the EUR value yourself at the time of the transaction. Your exchange overview sometimes also contains the fiat equivalent; you can use this in a CSV import by filling in the price_eur column.
