UK CGT Calculator for Fidelity

Upload your Fidelity export, from Fidelity.com or Fidelity.co.uk. Get the tax year’s gains in pounds, SA108 boxes and a PDF.

Reads your Fidelity export as it downloads. Nothing to reformat.

Fidelity Export, in 4 Steps.

Two platforms share the name, each with its own download. Follow the one you log in to; either file is recognised on sight.

  1. 1Log in to Fidelity Personal Investing
  2. 2Open Transactions & Reports → Transaction history
  3. 3Set Timeframe to the tax year you need (or a custom range covering 6 Apr – 5 Apr)
  4. 4Leave Account on All Accounts and choose Export → CSV

Fidelity US Shares, Dividends and Fees.

Fees, the Section 104 pool, share matching and the foreign pages, from one History CSV.

Two sales from the Fidelity example expanded: 10 Apple on 10 February for £1,953.76 and 20 Johnson & Johnson on 3 March for £3,064.90, each net of £0.01 fees at the HMRC monthly rate.
Portfolio holdings from the Fidelity example: the Apple pool history expanded, 40 shares bought on 4 April 2025 for £5,301.28, 25 and then 10 sold at average cost, 5 left at £662.66.
Matching-rule cards and two rows from the Fidelity example: 20 Procter & Gamble sold on 14 October under Bed & Breakfast for a £58.63 loss, and 20 NVIDIA sold the same day on 20 November for a £120.06 loss, both expanded.
SA106 foreign income from the Fidelity example: £501.96 of USA dividends for box 6 and £42.97 of interest from overseas savings for box 4, each with £0.00 foreign tax.

Fidelity and Your Other Brokers.

Upload every broker’s file together and get one report,
each sale tagged with where it came from.

Income schedule with interest, excess reportable income, and income broken down by broker.PDF
Capital gains tax computation summary with the exact SA108 box mapping for a 2024/25 tax year.PDF
SA108-ready
Schedule C option disposals and the Section 104 holdings carried forward.PDF

Summary + SA108 boxes

FAQ

Which Fidelity file do I upload for UK tax?

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From Fidelity.com, the History download: Accounts & Trade, then History, then Download, the CSV whose header begins Run Date, Account, Account Number, Action, Symbol. From Fidelity.co.uk, the Transaction history CSV under Transactions & Reports. Start at your first buy, not at 6 April: the cost of what you sell comes from your whole buying history (HS284).

Do I have to say which Fidelity it is?

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No. A Fidelity.com History file is known by its Run Date and Accrued Interest columns, a Fidelity International file by the Order date, Transaction type and Product Wrapper header on line 7, after its six-line preamble. A portfolio, positions or valuation export has no dealing rows and is refused by name rather than read as an empty year.

Fidelity.com only lets me download about 90 days at a time. Is that a problem?

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No. Download each range and upload the files together. A row that appears in two files is counted once.

Which exchange rate is used?

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HMRC’s monthly rate for the month of each trade. A Fidelity.com file is dollars throughout, with no sterling column, so every buy, sale, dividend and interest row is converted from its own month. A Fidelity International file settles in pounds and needs no conversion.

Is a sale dated by Run Date or Settlement Date?

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Run Date. HMRC dates a disposal by the day the contract is made, not the day it settles (TCGA92 s28), so the Settlement Date column is not read. Fidelity exports newest first; the rows are put back into date order.

Where are the commission and fees?

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In the amount. Fidelity.com fills Amount ($) net of Commission ($) and Fees ($), so a buy’s cost and a sale’s proceeds are read from that column as they stand; price × quantity is used only when Amount is blank. Fidelity International puts each Dealing Fee on a row of its own: an EQQQ buy of £357.27 against £355.77 of cash out is a £1.50 fee, already inside the buy’s cost; on a sale it comes off the proceeds. A fee that fits no buy or sale that day is named in a warning.

Are dividends shown before or after US tax?

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As Fidelity lists them. A DIVIDEND RECEIVED row has one amount and no withholding row beside it, so the report shows the dividend as paid, with £0 of foreign tax against it on the SA106. Tax withheld by Fidelity, if any, is on your 1042-S; enter it there for Foreign Tax Credit Relief.

What happens to SPAXX and the core position?

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INTEREST EARNED on the core money-market fund is savings interest, shown on the foreign pages as interest from overseas savings. A REINVESTMENT row, a dividend swept back into SPAXX, is a purchase of fund units and sets their cost. A fund that pays as DIVIDEND RECEIVED, SGOV for one, is recorded as a dividend; UK rules may treat that income as interest, so review those rows.

I have an ISA and a SIPP at Fidelity International. Are they left out?

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Yes. In an All Accounts export, rows in an ISA, Junior ISA or SIPP wrapper are skipped, and one warning says how many. Investment Account and Cash Management Account rows are read. A wrapper with any other name is read as taxable and named in a warning with its line number, so nothing is dropped or taxed in silence.

Why is a Fidelity International Sell row not a disposal?

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Because it was a withdrawal. Fidelity writes Sell against Cash for the cash leg of taking money out. The Investments column, not the transaction type, says whether a row is a fund or the cash balance, and only a fund is a disposal.

Does excess reportable income work for funds held at Fidelity International?

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Through the ISIN, which the export does not carry. Vanguard funds are placed from their names and their reported income applied; any other fund is named in a warning so you can enter its ISIN and ERI yourself. Interest is reported gross, the figure the return asks for; the Tax On Interest row Fidelity deducts is not carried through, so enter the tax already paid on the savings pages.

Can I combine Fidelity with another broker?

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Yes. Upload the files together. Fidelity.com rows carry the ticker, so Apple at Fidelity and at Schwab or IBKR is one Section 104 pool and the 30-day rule runs across them. Fidelity International funds are keyed on the ticker Fidelity prints in brackets, VWRL for instance, or on the fund name when there is none; a name never meets another broker’s symbol, and the report says so when that could matter.