UK CGT Calculator for Interactive Brokers
Upload your IBKR Activity Statement. Get shares and options in pounds, SA108 boxes and a PDF.
Reads your Interactive Brokers export as it downloads. Nothing to reformat.
Interactive Brokers Export, in 6 Steps.
Use the Activity Statement CSV — the simple trades export does not support options.
- 1Log in to IBKR Client Portal
- 2Go to Performance & Reports → Statements
- 3Select Activity statement type
- 4Choose your date range (max 365 days per export)
- 5Select CSV format
- 6Click Run and download
Manage and Calculate IBKR Options.
Premiums, assignments and the wheel, from the same statement.
FAQ
Which IBKR report do I upload for UK tax?
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The Activity Statement, as a CSV: Performance & Reports, then Statements, then Activity. The Transaction History export leaves out corporate actions and opening positions, so the tax would come out too low; it is refused.
How many years of IBKR statements do I need?
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Every year since you opened the account. The cost of shares you sell comes from your whole buying history (HS284). Overlapping statements are counted once, and a gap between them is flagged.
Which exchange rate is used for USD trades?
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HMRC’s monthly exchange rate for the month of the trade, applied to every leg in a foreign currency. Open a sale in the report to see the rate it used.
How are IBKR options taxed in the UK?
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Each contract series is its own asset. Writing an option is a disposal on the day you write it (CG12312). On assignment the premium goes into the share cost or the proceeds (CG12313).
Are US Treasury bills and UK gilts taxed as capital gains?
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No. A T-bill held to maturity is a deeply discounted security, and the discount is taxed as income (SAIM3010); we book it as interest. UK gilts are exempt from Capital Gains Tax.
Are futures supported?
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No. Futures are left out of the report with a warning; everything else in the statement is calculated.
Can I combine IBKR with another broker?
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Yes. Upload the files from each broker together. Shares of the same company are one pool however many brokers hold them, so a sale is costed against all of them.