BubbleTax automatically processes Interactive Brokers FlexQuery data to generate comprehensive tax reports compliant with German tax law. The platform calculates gains, losses, dividends, and foreign currency impacts, handling complex elements like corporate actions and investment fund exemptions. Users receive a legally secure, detailed PDF report ready for submission to the tax office.
Funding
Funding not disclosed
Founders
Product
Problem
German investors using Interactive Brokers must manually compile complex tax calculations—FIFO gains/losses, dividend withholding, corporate actions, foreign‑currency gains, and Investment Tax Act exemptions—often resulting in time‑consuming spreadsheets and risk of errors when filing their capital‑income tax returns.
Solution
BubbleTax is a rule‑based accounting platform that transforms an Interactive Brokers FlexQuery XML file into a fully compliant German tax report. The service automatically applies FIFO accounting, detects corporate actions, calculates dividend withholding based on double‑tax treaties, converts foreign‑currency results using ECB reference rates, and incorporates partial exemption and advance lump‑sum rules from the Investment Tax Act. All calculations are performed in seconds and the output is a PDF report that maps amounts to the relevant tax forms (KAP, KAP‑INV, SO), ready for submission to the tax office. Data are transmitted and stored encrypted, meeting GDPR standards, and users can recalculate reports at any time.
Target Audience
The primary customers are individual German investors who trade through Interactive Brokers and need a tax‑ready report for their capital‑income filings; tax advisors serving such clients also benefit from the automated output.
Features
- Automatic FIFO computation for stocks, ETFs, options, futures, and CFDs
- Real‑time detection and handling of splits, spin‑offs, tender offers, and other corporate actions
- Dividend and withholding‑tax processing with country‑specific treaty rules
- Foreign‑currency gain/loss conversion using official ECB exchange rates
- Partial exemption and advance‑lump‑sum calculations per the Investment Tax Act (InvStG)
- Professional securities classification sourced from a bank‑grade data provider
- PDF report including summary, detailed breakdown, and direct assignment to German tax forms (KAP, KAP‑INV, SO)
- Encrypted data transmission and storage, GDPR‑compliant, with unlimited recalculations per tax year