New: Tax Summary – the report you actually want to read

900 pages are correct. But not practical.

If you actively trade through Interactive Brokers, you know the BubbleTax detail report: every transaction, every FIFO allocation, every currency conversion. Exactly what you need when the tax office asks questions.

The problem: for active traders, this report can be 800, 900 or more pages long.

That's the right approach for traceability. But when you sit down at nine in the evening and just want to know which number goes into line 19 of Anlage KAP, a 900-page PDF doesn't help.

What we changed

BubbleTax now generates two separate PDFs in the ZIP:

1. Tax Summary (Steuerzusammenfassung) – a few pages with the numbers for your tax return
2. Detail Report (Detailreport) – same as before, complete transaction lists with FIFO traceability

The summary comes first in the ZIP. You open the archive, see the results document right away, and only go to the detail report when you want to trace a specific number.

What's in the summary

Anlage KAP, KAP-INV and SO – ready to use

The page you actually open the report for. Amounts mapped to the tax form lines. Copy, enter, done.

Where do the numbers come from?

For anyone who wants to understand the breakdown: this section shows totals by German loss offset category (Verlustverrechnungstöpfe). Equities, other capital income, investment funds, private disposal transactions – each shown separately.

Breakdown by security

Which stock contributed what? Which option premiums, which dividends? Listed by ISIN and amount per security. So you don't have to search through the detail report for individual positions.

Methodology

FIFO procedure, ECB exchange rates, fund classification, corporate actions – a dedicated chapter explaining what's calculated and how. Particularly useful when your tax advisor receives the report and wants to understand what BubbleTax actually does.

Already filed? Nothing to worry about

The calculations are identical. The numbers haven't changed. The tax summary is a different presentation of the same results.

If you've already submitted your 2024 or 2025 tax return: everything stands as before.

Tax advisors get a working document

Thomas and I deliberately built the report so that a tax advisor can work with it without going through the 900-page detail report first. Amounts are mapped to KAP lines, the derivation is traceable, and the methodology is documented.

If the tax office wants to see individual transactions, the detail report is right there in the same ZIP.

Try it

Upload your IBKR data – the tax summary is generated automatically. Also included in the free preview.

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Disclaimer: This blog is for informational purposes and does not constitute tax advice. For individual tax questions, please consult a tax advisor.