Fidelity UK CGT: upload your History CSV, get an HMRC report

product-updates

If you hold US shares and ETFs with Fidelity, the broker does not file your UK Capital Gains Tax for you. You still need to report disposals on Self Assessment (SA108), and foreign dividends on SA106, once your gains, proceeds, or income cross the HMRC thresholds. Our CGT Calculator now reads the Fidelity brokerage History CSV directly and produces an HMRC-style report.

What the calculator does with your Fidelity file

  • Stock disposals. “You Bought” and “You Sold” rows are matched under HMRC’s same-day, 30-day bed-and-breakfast, and Section 104 pool rules.
  • Foreign dividends. “Dividend Received” rows are recorded as US-source dividend income for the SA106 foreign pages.
  • Money-market reinvestments. A cash dividend swept back into the core fund (e.g. SPAXX) appears as a “Reinvestment” row; it is booked as a purchase so it establishes cost basis in the reinvested units.
  • USD to GBP conversion. Every figure is converted with HMRC monthly average rates, not the spot rate Fidelity shows. The net Amount, already inclusive of commission and fees, is used as the HMRC cost or proceeds.

How to export your Fidelity History CSV

  1. Sign in at Fidelity.com and open Accounts & Trade, then History (also shown as Activity & Orders).
  2. Set the date range to cover the full UK tax year (6 April to 5 April). Fidelity caps each download to a limited window (historically about 90 days), so a full year usually needs several files — download each range and upload them all together; overlapping rows are de-duplicated automatically.
  3. Choose Download and save the CSV — the file whose header begins Run Date,Account,Account Number,Action,Symbol,… — then upload it.

The Positions and Realized Gain/Loss downloads are a different format and are not used here — upload the History CSV. If you pick the wrong export, the calculator says so rather than returning a blank report.

What is not handled yet

Options trades and corporate actions (stock splits, mergers, symbol changes) are not parsed from Fidelity exports yet; if options make up most of your trading, Interactive Brokers has the most complete coverage today. A sale with no matching purchase in the file — shares bought before the export window — is excluded with a warning rather than booked at £0 cost, so add the earlier purchase to complete the calculation. Distributions from US money-market and bond funds such as SGOV are recorded as dividends per Fidelity’s label; under UK offshore-fund rules some of these may belong on the interest pages, so review them if you hold these funds.

Try it without uploading anything sensitive

Open the CGT Calculator and drop in your Fidelity History CSV. The file is processed inside your browser by a WebAssembly engine. Nothing is uploaded, nothing is stored, and you can close the tab to wipe the session. Want to see the output first? Browse a full Fidelity UK CGT example report built from a sample History export. Every action we read is documented on the Brokers page.