Moneybox is popular with UK investors using stocks and shares accounts, ISAs, LISAs and pensions. For capital gains tax, the relevant data is the taxable General Investment Account activity outside an ISA or pension wrapper. FiscalFox reads the Moneybox transaction history, imports every purchase and sale with its units, ISIN and net cash, and applies HMRC's same-day, 30-day and Section 104 share matching rules.
How to prepare your Moneybox file
Use the transaction history for your General Investment Account rather than a valuation, statement summary or holdings snapshot. Choose a date range that starts before your first investment and runs through 5 May after the completed tax year ends. This supplies the Section 104 pool history and purchases within 30 days of year-end sales; the report still covers only the selected year.
- Open Moneybox and go to your General Investment Account.
- Download its transaction history as an Excel file, starting before your first investment.
- Check that the file includes TransactionDate, Details, MoneyOut, MoneyIn, Balance and Type columns.
- Upload the file unchanged to FiscalFox and select Moneybox as the broker.
FiscalFox only imports taxable trades and income
ISA, Lifetime ISA and pension accounts are outside CGT, so only upload your General Investment Account history. Deposits, withdrawals and platform fees are not trades and are left out.
Once the file is ready, open the FiscalFox calculator, choose Moneybox, and upload the Excel file. FiscalFox parses the file in your browser where possible. A copy is also kept privately for support and troubleshooting, whether or not you are signed in, normally for 14 days, with the exceptions explained in our privacy policy.
File format details
The Moneybox transaction history lists every cash movement in the account, one row each:
- TransactionDate - the date used for share matching
- Details - for a trade, the units, fund name, ISIN, price and net cost or net proceeds
- MoneyOut and MoneyIn - the cash paid or received, checked against the trade details
- Type - Buy, UnitSell, CashSell, BuyReversal, Dividend, InterestPaid, fees, deposits and withdrawals
- Balance, IsBuyOrSell and IsConfirmed - account balance and status flags
How FiscalFox processes Moneybox data
FiscalFox reads each purchase and sale from the Details text, for example a purchase of 6.72 units at £1.06 with a net cost of £7.10. The net cost or net proceeds is the GBP figure used for CGT, and the per-unit price is that amount divided by the units. Trades are pooled by ISIN, so a fund that Moneybox renames stays in the same holding.
FiscalFox checks each trade's net cash against the MoneyOut or MoneyIn figure on the same row. If they differ, the trade is held for review instead of being used silently. The final report shows the disposal proceeds, matched acquisition cost, gain or loss, and the HMRC rule used for each sale.
Common Moneybox upload issues
Only ISA or pension history
If the file is for a Moneybox ISA, Lifetime ISA or pension, FiscalFox will not import any CGT transactions. That is expected: those wrappers are outside capital gains tax.
History starts too late
If the file starts after your first purchase, a sale can look larger than the units you hold. Download the history again from before your first investment so every acquisition is included.
Cancelled purchases
A purchase reversal cancels the purchase it names. FiscalFox removes that purchase from the pool. If the reversed purchase is not in the file, the upload stops so you can download a longer history.
Supported transaction types
| Moneybox Row | How FiscalFox Uses It |
|---|---|
| Buy | Added to the Section 104 pool for that fund's ISIN |
| UnitSell or CashSell | Treated as a disposal and matched using HMRC share matching rules |
| BuyReversal | Removes the cancelled purchase it names |
| Dividend | Imported as dividend income |
| InterestPaid | Imported as cash interest, which is savings income |
| Fees, deposits and withdrawals | Left out because they are not trades or allowable costs |
Frequently asked questions
Does FiscalFox support Moneybox?
Yes. FiscalFox reads the Moneybox transaction history Excel file for your General Investment Account and imports every purchase, sale, dividend and cash interest payment.
Which Moneybox file should I upload?
Upload the transaction history Excel file for your Moneybox General Investment Account. It has TransactionDate, Details, MoneyOut, MoneyIn, Balance and Type columns. An order history workbook with Investment, Date, Order Status, Account, Buy/Sell, Quantity and Cost/Proceeds columns is also accepted.
Do Moneybox ISA or pension investments count for CGT?
No. Gains inside a Moneybox ISA, Lifetime ISA or pension are not chargeable to UK capital gains tax, so FiscalFox leaves those accounts out.
How does FiscalFox match Moneybox funds?
Each purchase and sale in the Moneybox transaction history names the fund and its ISIN. FiscalFox pools trades by ISIN, so a fund that Moneybox later renames stays in the same Section 104 pool.
Official UK tax references
This guide is checked against published GOV.UK and HMRC material. FiscalFox is a calculation tool, not personal tax advice; review unusual transactions with a qualified adviser.