BubbleTax – Your Free Helper for Tax Returns with Interactive Brokers
Automatically process your Interactive Brokers trades for German tax reporting
We handle the tedious work of calculating stock, options and foreign currency gains to simplify your tax return
Private project by individual developers - Not a substitute for professional tax advice
What is BubbleTax?
BubbleTax helps you correctly prepare your trading activities with Interactive Brokers (IBKR) for German tax returns.
Since IBKR doesn't withhold capital gains tax and calculating profits from stocks, options, and foreign currencies can be complex, we take care of the tedious work for you.
Our service is currently free as we are in a beta phase. We welcome your feedback to improve BubbleTax further!
How BubbleTax Works
Register & Login
Sign in with your email and receive a magic link for login
Upload CSV File
Upload your account statement from Interactive Brokers
Start Calculation
Our algorithm processes your transactions in seconds
Get Results
Download a ZIP file with Excel overview and HTML summary
What exactly does BubbleTax calculate?
Stock and options profits and losses
Clear calculation of capital gains and losses from securities trading
Foreign currency gains and losses
With conversion based on the ECB reference exchange rate
German tax categorization
Classification of transactions according to German tax regulations
Aggregated transaction view
Summary of amounts for each transaction type
Compatible with multiple brokers
BubbleTax works with CSV exports from Interactive Brokers and introducing brokers such as Lynx, CapTrader, or similar providers based on the IBKR platform (not affiliated).
Important DisclaimerNON-PROFESSIONAL TOOL
BubbleTax offers absolutely no guarantee for the correctness of the calculations.
All results must be carefully reviewed. You must consult a tax advisor, as our calculations are not a substitute for professional tax advice.
You are responsible for ensuring that the figures are correct and match the exports from Interactive Brokers.
Independent Private Project
BubbleTax is developed by private individuals as a helper tool for personal use and shared with the community. We are not a registered company, not tax professionals, and not affiliated with any broker mentioned on this website. We provide no official tax advice.
Support Us!
BubbleTax is an independent project we developed to simplify tax returns for private investors. Our goal is to provide a simple, fast, and transparent solution for the complex tax preparation of IBKR transactions.
Since BubbleTax is still in the beta phase, we welcome feedback and suggestions for improvement to optimize the service further.
Have suggestions or ideas? Write to us – feedback is explicitly welcome!
BubbleTax is a privately developed tool, not a substitute for professional tax advice. Results require verification.