The P&L you see in IBKR is not your UK tax figure
Most investors think that the profit and loss they see in Interactive Brokers is close enough to what goes on their tax return.
In reality, that's not the case.
The P&L shown by IBKR isn’t a UK tax calculation. On top of that, an IBKR account can mix shares, ETFs, options, futures, interest, dividends and currency conversions. These don’t all share the same tax treatment, and they can’t be netted off into one simple number for HMRC.
Relying on the headline P&L alone can easily lead to errors in your Self Assessment.
.png&w=3840&q=75)
Turn thousands of transactions into tax-ready reports
The platform automatically reconstructs your trading activity, organises it in line with UK tax rules, and produces tax-ready reports together with supporting documentation.
This means you can move from thousands of lines of data to filing‑ready documentation, without having to manually unpick your broker’s statement.
From Interactive Brokers to your Self Assessment
From the platform of Interactive Brokers, you can export the Activity Statement for the financial year in CSV format. This file serves as the starting point for reconstructing transactions, positions, dividends, interest, account balances and account movements.
Finbooks reconstructs your complete investment history, calculates your capital gains and losses, tracks dividend income and applies the relevant HMRC tax rules.
Finally, Finbooks generates a complete set of tax-ready reports for your Self Assessment, together with detailed supporting documentation explaining every calculation. Use them yourself or share them with your accountant.
