BubbleTax – Your Tax Report for Interactive Brokers

BubbleTax is a technical accounting platform that automatically converts your Interactive Brokers data into a tax-compliant report according to German law.

A FlexQuery file (XML) from the Interactive Brokers portal. We show you step by step how to export it.

BubbleTax supports the tax preparation of capital income such as dividends, interest, distributions from investment funds, as well as the advance lump sum (coming soon) and partial exemption according to the Investment Tax Act. Trading transactions – i.e., gains and losses from stocks, ETFs, options, futures, and CFDs – as well as foreign currency gains and losses from interest-bearing currency accounts are also processed. Private disposal transactions according to § 23 EStG, such as Xetra Gold and comparable assets, are also considered. Currently not supported are MLPs (Master Limited Partnerships), LPs (Limited Partnerships), and Royalty Trusts. The distributions from these structures are particularly complex from a tax perspective; manual follow-up work is required, and it is recommended to consult a tax advisor.

The securities classifications come from a professional data provider – the same source that banks use.

A PDF report that can be used as evidence for the tax office, including all detailed calculations.

All data is transmitted encrypted and also stored encrypted. We use modern security standards to protect your data.

Yes. The calculations comply with the applicable legal requirements (EStG, InvStG, BMF letters). The report is accepted by tax offices as evidence. For complete documentation, we recommend submitting the BubbleTax report along with the corresponding account statements or broker documents.

Yes. After uploading your FlexQuery data, you can choose the classification (Equity Fund / Mixed Fund / Other Funds) yourself. BubbleTax automatically incorporates this selection into the entire calculation and all tax values.

There is no reliable classification for US funds through WM Datenservice, as these products are not considered regular European investment funds. To enable you to make a correct tax classification, we give you the choice – the responsibility lies with the user.

Yes. After you have set the classification, BubbleTax automatically calculates the taxable values according to the partial exemption. No subsequent manual adjustment is necessary.

UCITS funds are automatically classified by WM Datenservice. These data are considered reliable and are used directly for tax calculations.

We are planning to additionally display the equity quota from public sources such as Yahoo Finance, so that you can better understand your classification. However, the decision on the tax classification remains with the user for legal reasons.

Yes. Return of Capital, option premiums, cash settlements, option exercises, and USD bookings from short puts are fully supported.

Yes. In the Pro version, you can process two completely independent IBKR accounts – even if they belong to different people. Important: Only if assets have been transferred between both accounts should you calculate them separately.

No. The goal of BubbleTax is to provide you with a completely tax-ready evaluation. Manual post-processing should not be necessary – especially not for the classification of US funds.