Investir is command-line utility to analyse your account activity on share investing platforms. It can provide the information required to fill out the Capital Gains SA108 form for the Self Assessment tax return. The gain or loss is calculated based on the HMRC share identification rules. Investir also facilitates viewing the cost, allocation weight and unrealised gain/loss for open positions, share buying and selling orders placed, dividends paid out, interest on cash earned, and cash deposits or withdrawals made.
A CSV file with your account activity is required as input. This file can be exported from your investment platform. Presently, only Freetrade and Trading 212 are supported, but the project modularity facilitates adding support for more.
The Yahoo Finance API can be used to find the share sub-division or share consolidation events executed for a given corporation, and that information is considered when calculating the capital gains.
The information provided by Investir might be inaccurate or simply not correct for your specific circumstances. Use the software at your own risk and always seek advice from a professional accountant before submitting your Self-Assessment tax return.
Before installing Investir, it is recommended to create a virtual environment for the installation:
$ python -m venv .venv
$ source .venv/bin/activate
Investir can be installed from the Python Package Index (PyPI):
(.venv)$ python -m pip install investir
If you type investir and press the enter key, Investir's command
help should now be displayed.
This section provides some examples in how to use Investir's command-line interface.
Tip
Investir can process more than one CSV file as input, including CSVs from different investment platforms.
View a capital gains report with the information required to fill out the Capital Gains SA108 form for the Self Assessment tax return:
$ investir capital-gains data/freetrade.csv
Tax year 2021-2022
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Date Disposed Date Acquired ISIN Name Quantity Cost (£) Proceeds (£) Gain/loss (£)
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2021-08-25 Section 104 US5949181045 Microsoft 13.00246544 2366.57 2952.48 585.91
2021-09-01 Section 104 US83088M1027 Skyworks 1.24584888 167.16 153.21 -13.95
2021-09-13 2021-09-13 GB00BLDYK618 SMT 34.00000000 443.65 474.83 31.18
2021-09-13 2021-09-26 GB00BLDYK618 SMT 40.00000000 482.67 558.62 75.95
2021-09-13 Section 104 GB00BLDYK618 SMT 14.00000000 189.85 195.52 5.67
2021-11-02 Section 104 US0378331005 Apple 26.22913238 2647.31 3653.35 1006.04
2022-01-27 Section 104 US83088M1027 Skyworks 1.24584888 167.21 178.13 10.92
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Number of disposals: 7 Gains in the year, before losses: £1715.67
Disposal proceeds: £8166.14 Losses in the year: £13.95
Allowable costs (including purchase price): £6464.42 Net gain or loss: £1701.72
Tax year 2022-2023
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Date Disposed Date Acquired ISIN Name Quantity Cost (£) Proceeds (£) Gain/loss (£)
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2022-09-20 Section 104 US0231351067 Amazon 48.31896981 3493.12 4941.53 1448.41
2022-10-14 Section 104 US5949181045 Microsoft 1.32642000 324.79 319.76 -5.03
2022-12-16 Section 104 US83088M1027 Skyworks 8.30000000 1094.16 979.69 -114.47
2023-03-03 Section 104 US83088M1027 Skyworks 2.10000000 277.20 312.95 35.75
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Number of disposals: 4 Gains in the year, before losses: £1484.16
Disposal proceeds: £6553.93 Losses in the year: £119.50
Allowable costs (including purchase price): £5189.27 Net gain or loss: £1364.66View cost, allocation weight, and unrealised gain/loss for open positions:
$ investir holdings --show-gain-loss data/freetrade.csv
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ISIN Name Cost (£) Allocation (%) Quantity Average Cost (£) Unrealised Gain/Loss (£)
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GB00BLDYK618 SMT 2196.81 55.88 162.00000000 13.56 -696.37
US5949181045 Microsoft 882.35 22.44 3.62439184 243.45 314.96
US0378331005 Apple 301.70 7.67 3.00000000 100.57 225.20
US83088M1027 Skyworks 301.08 7.66 2.29594360 131.13 -145.75
US70450Y1038 PayPal 249.59 6.35 4.13171759 60.41 29.08
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3931.53 100.00 -272.88
---------------------------------------------------------------------------------------------------------------------View share buying and selling orders placed:
$ investir orders data/freetrade.csv
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Date ISIN Name Ticker Total Cost (£) Net Proceeds (£) Quantity Price (£) Fees (£)
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2021-04-07 US0378331005 Apple AAPL 1940.99 20.13713692 96.15 4.76
2021-06-05 US0378331005 Apple AAPL 998.48 9.09199546 109.33 4.47
2021-06-11 US5949181045 Microsoft MSFT 2715.44 15.00246544 180.19 12.20
2021-08-12 US83088M1027 Skyworks SWKS 1497.76 11.21263989 132.98 6.71
2021-08-25 US5949181045 Microsoft MSFT 2939.35 13.00246544 227.07 13.13
2021-08-26 GB00BLDYK618 SMT SMT 2386.66 176.00000000 13.49 11.90
2021-09-01 US83088M1027 Skyworks SWKS 152.47 1.24584888 122.98 0.74
2021-09-13 GB00BLDYK618 SMT SMT 1228.97 88.00000000 13.97 0.00
2021-09-13 GB00BLDYK618 SMT SMT 443.65 34.00000000 13.03 0.78
2021-09-26 GB00BLDYK618 SMT SMT 482.67 40.00000000 12.05 0.56
2021-11-02 US0378331005 Apple AAPL 3643.81 26.22913238 139.29 9.54
2022-01-27 US83088M1027 Skyworks SWKS 177.34 1.24584888 142.98 0.79
----------------------------------------------------------------------------------------------------------------------------
2022-04-10 US70450Y1038 PayPal PYPL 249.59 4.13171759 60.05 1.46
2022-05-12 US5949181045 Microsoft MSFT 843.26 2.95081184 284.09 4.95
2022-07-09 US0231351067 Amazon AMZN 3464.02 48.31896981 71.27 20.36
2022-09-20 US0231351067 Amazon AMZN 4912.43 48.31896981 102.27 29.10
2022-09-28 US83088M1027 Skyworks SWKS 499.95 3.97500146 125.03 2.94
2022-10-14 US5949181045 Microsoft MSFT 317.88 1.32642000 241.07 1.88
2022-12-16 US83088M1027 Skyworks SWKS 973.95 8.30000000 118.03 5.74
2023-03-03 US83088M1027 Skyworks SWKS 311.13 2.10000000 149.02 1.82
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15522.47 14657.33 133.83
----------------------------------------------------------------------------------------------------------------------------View dividends paid out:
$ investir dividends data/freetrade.csv
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Date ISIN Name Ticker Amount (£) Tax widhheld (£)
----------------------------------------------------------------------------------
2022-02-12 US0378331005 Apple AAPL 1.37 0.24
2022-03-09 US5949181045 Microsoft MSFT 3.44 0.61
2022-03-15 US83088M1027 Skyworks SWKS 2.50 0.44
----------------------------------------------------------------------------------
2022-05-13 US5949181045 Microsoft MSFT 4.12 0.72
2022-06-08 US0378331005 Apple AAPL 1.64 0.28
----------------------------------------------------------------------------------
13.07 2.29
----------------------------------------------------------------------------------View interest on cash earned:
$ investir interest data/freetrade.csv
--------------------------
Date Amount (£)
---------------------------
2021-10-15 1.70
2022-01-15 1.59
---------------------------
2022-04-15 1.61
2022-07-15 1.58
2023-01-15 1.81
---------------------------
8.29
---------------------------View cash deposits and withdrawals made:
$ investir transfers data/freetrade.csv
---------------------------------------------
Date Deposited (£) Withdrew (£)
---------------------------------------------
2021-03-02 6000.00
---------------------------------------------
2021-07-28 4000.00
2022-02-24 400.00
---------------------------------------------
2022-04-08 100.00
2023-01-03 2000.00
---------------------------------------------
12000.00 500.00
---------------------------------------------Tip
Each command supports various options that can be used to filter the
output based on several criteria. Use the --help option for any
command for a description of all the available options.
To modify Investir and evaluate the changes, clone this repository and execute an editable install:
$ git clone https://github.com/tacgomes/investir.git
$ cd investir
$ python -m venv .venv
$ source .venv/bin/activate
(.venv)$ python -m pip install --editable .[lint,test]
Note
Linters and test packages used by this project will also be installed.
-
No special handling takes place for the accumulation class of shares for an investment fund, where income from dividends or interest are automatically reinvested back into the fund. This means that in practice you might have to pay more tax on your income and less tax on capital gains when you sell the fund than what is reported.
-
Multi-currency accounts in Trading 212 are not supported and the program will terminate if encounters transactions whose base currency is not in pound sterling (GBP). These transactions can be ignored instead by using the
--no-strictcommand-line option.