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Tastyworks PNL

Create a PnL-document for a tax income statement in Germany for the US-broker tastyworks. Download all transactions from Tastyworks into a csv-file and create with this python-script a new enhanced csv-file. This new csv-file adds a currency conversion from USD to Euro and computes the realised profits and losses based on the FIFO method. Also all currency gains for the USD-cash-account are added. A summary for all stock, fond, dividend, option and future gains/losses is output.

Details on German taxes are written up at https://laroche.github.io/private-geldanlage/steuern.html.

Installation & Setup

Dependencies Installation

Before running the project, ensure all dependencies are installed. Execute the following command:

pip install -r requirements.txt

Execution

Run the following command to convert from the tastyworks csv file (transaction_history.csv) to a 2023 tax statement as csv file (tastyworks-tax-2023.csv):

python3 tw-pnl.py --assume-individual-stock --tax-output=2023 --output-csv=tastyworks-tax-2023.csv transaction_history.csv

Continue with Google Spreadsheets or libreoffice spreadsheet to finalize your tax report:

soffice tastyworks-tax-2023.csv

The following command outputs a more detailed csv report for your personal review together with a yearly summary for all years in the extra file tastyworks-summary.csv:

python3 tw-pnl.py --assume-individual-stock --summary=tastyworks-summary.csv --output-csv=tastyworks-tax.csv transaction_history.csv
soffice tastyworks-tax.csv
soffice tastyworks-summary.csv

RUN.sh contains an example on how to generate all reports.

If the script does not complete successfully, please add the option --debug to see additional information on where it stops.

[In German: Erstellt eine Gewinn- und Verlustberechnung für eine Steuererklärung in Deutschland für den US-Broker Tastyworks. Lade von Tastyworks alle Transaktionen in eine CSV-Datei herunter und generiere mit diesem Python-Skript eine neu aufbereitete CSV-Datei. Diese neue CSV-Datei fügt eine Umrechnung von USD in Euro hinzu und berechnet die realisierten Gewinne und Verluste nach FIFO-Methode. Auch eine Berechnung aller Währungsgewinne für das USD-Cashkonto wird erstellt. Eine Übersicht über die verschiedenen Gewinne/Verluste für Aktien/Fonds/Dividenden/Optionen und Futures wird ausgegeben.

Details zur Steuererklärung in Deutschland sind unter https://laroche.github.io/private-geldanlage/steuern.html zusammengestellt.

Eine Web-Applikation für dieses Python-Skript wird in Zukunft unter https://knorke2.homedns.org/depot-pnl aufgebaut.]

Starte folgenden Kommandozeilen-Aufruf für eine Konvertierung von einer Tastyworks csv-Datei (transaction_history.csv) zu einer Steuerausgabe für 2023 als CSV-Datei (tastyworks-tax-2023.csv):

python3 tw-pnl.py --assume-individual-stock --tax-output=2023 --output-csv=tastyworks-tax-2023.csv transaction_history.csv

Für einen schönen Ausdruck lade ich die csv-Ausgabedatei in Google Spreadsheets. Dabei einfach keine Konvertierung von Zahlen zulassen. Dann die Überschrift groß und in Fettdruck darstelllen, einige Spalten auf Rechts-Formaierung stellen und fürs Finanzamt unnötige Daten löschen.

Als Alternative kann man die Tabellenkalkulation libreoffice mit der CSV Ausgabedatei tastyworks-tax-2023.csv starten:

soffice tastyworks-tax-2023.csv

Folgender Befehl gibt einen detaillierten CSV Report für den persönlichen Review zusammen mit einem Jahresüberblick für alle Jahre in die extra Datei tastyworks-summary.csv:

python3 tw-pnl.py --assume-individual-stock --summary=tastyworks-summary.csv --output-csv=tastyworks-tax.csv transaction_history.csv
soffice tastyworks-tax.csv
soffice tastyworks-summary.csv

RUN.sh enthält Beispielaufrufe zur Generierung aller Reports.

Falls das Skript nicht erfolgreich läuft, bitte die Option --debug hinzufügen, damit man zusätzliche Informationen sieht, an welcher Stelle genau abgebrochen wird.

How to use

Clone or download this repository onto your local computer. If you don't have git installed, you can download the current zip file from https://github.com/laroche/tastyworks-pnl/archive/refs/heads/main.zip.

Download your trade history as csv file from the web-browser via https://trade.tastyworks.com/index.html#/transactionHistoryPage. (Choose "Activity" and then "History" and then setup the filter for a custom period of time and download it as csv file. Do not download this file from the separate Tastyworks application, but use the website and your browser.)

Newest entries in the csv file should be on the top and it should contain the complete history over all years. (You can at most download data for one year, so for several years you have to download into several files and combine them into one file with a text editor.) The csv file has the following first line:

Date/Time,Transaction Code,Transaction Subcode,Symbol,Buy/Sell,Open/Close,Quantity,Expiration Date,Strike,Call/Put,Price,Fees,Amount,Description,Account Reference

If you delete the eurusd.csv file or your Tastytrade transaction history contains more recent transactions than the available data in this file, a current version is downloaded automatically directly from https://www.bundesbank.de/de/statistiken/wechselkurse. (Link to the data: eurusd.csv)

The option --usd can be used to prevent converting pnl data into Euro.

Per default the script stops on unknown trading symbols (underlyings) and you have to hardcode into the source code if it is an individual stock or some ETF/fond. You can use the --assume-individual-stock option to assume individual stock for all unknown symbols.

Currency gains are computed via FIFO as with other assets. They are tax free if hold for more than one year or if credit is paid back (negative cash balance). They are also tax free for dividends, credit payments and sold options as well as account fees. Currency gains need to go into the 'Anlage SO' within a private German tax statement.

The summary output lists all assets at the end of each year. 'account-usd' contains a FIFO list of all USD buys and the conversion price for Euro. This entry might be very long and look complicated. You might want to ignore this line and just look over the list of other assets.

The option --show gives some summary graphs.

The option --debug adds debug information on what data is currently processed to aid with debug reports on bugs and problems.

The option --verbose outputs the csv output data also as text on the screen. Just a way to see data differently, you normally should use the csv data for further processing.

If you work on Linux with Ubuntu/Debian, you need to make sure https://pandas.pydata.org/ is installed:

sudo apt-get install python3-pandas

Or use pip or pip3 for a local install:

pip install -r requirements.txt

pip3 install -r requirements.txt

For graphical output (--show), you need matplotlib:

sudo apt-get install python3-matplotlib

CSV and Excel Output

The script can also output all data again as CSV file or as Excel file. (CSV should be most robust, I don't have much experience with Excel. I'd recommend CSV and just reading it into a new Excel sheet yourself. Both data types contain the same output data.)

The options for this are --output-csv=file.csv and --output-excel=file.xlsx.

The output contains the important original data from the Tastyworks csv file plus pnl generated data as well as eurusd conversion data. You probably do not have to provide all data in a tax statement, some is only added for further data processing convenience in your spreadsheet program.

If you provide the option --tax-output=2023, your output file will be optimized for tax output for a special year. Only transactions for that year are output. The datetime will only contain the day, but no time information. Fewer other data is output.

The CSV file contains floating point numbers in English(US) notation where a decimal point (".") and no decimal comma (",") is used as decimal separator for floating point numbers like in "-0.2155". Usually Tastyworks provides floating point numbers with 4 decimals after the decimal separator. For yearly summaries I only output with 2 decimal digits.

Here the output transaction data in detail:

  • datetime: Date and time (Tastyworks gives minutes for this, no exact seconds) of the transaction
  • type: type of transaction (German names): Aktie, Aktienfond, Mischfond, Immobilienfond, Sonstiges, Option, Future, Dividende, Quellensteuer, Zinsen, Ein/Auszahlung, Ordergebühr, Brokergebühr
  • pnl: pnl for tax payments for this transaction based on FIFO
  • term_loss: how much does this transaction contribute to losses in future contracts ('Verlustverrechnungstopf Termingeschäfte'). If you use the option -b then also all losses from option writing are added here.
  • eur_amount: 'amount - fees' converted into Euro currency
  • usd_amount: transaction amount in USD
  • fees: cost of transaction in USD that needs to be subtracted from amount (Tastyworks fees and all exchange, clearing and regulatory fees)
  • eurusd: official eurusd conversion rate for this transaction date from bundesbank.de
  • quantity: number of buys or sells
  • asset: what is bought (stock symbol or something like 'SPY P310 20-12-18' for an option
  • symbol: base asset (underlying) that is traded. This is included to be able to generate summary overviews for e.g. all transactions in SPY with stocks and options combined.
  • description: additional informational text for the transaction
  • cash_total: account cash balance in USD after this transaction. This is the previous account total plus 'amount - fees' from this transaction. (Cash amount at Tastyworks.) This is purely informational and not needed for tax data.
  • net_total: Sum in USD of cash_total plus all assets (stocks, options) in your account. This does not use current market data, but keeps asset prices at purchase cost. Best looked at to check if this script calculates the same total sum as shown in your Tastyworks current total.
  • tax_free: are further currency changes tax free (German: steuerneutral)
  • usd_gains: currency conversion gains for the account in USD. Based on cash changes in USD due to this transaction.
  • usd_gains_notax: as above, but not part of German tax law

FAQ

  • Either github issues or email works for me to enhance/fix this program. Sample data is best to resolve issues.
  • This script needs the input CSV file to be in encoding format UTF-8 with numbers in US-format. Output is also in US-format, so you need to convert this into German style of numbers. libreoffice is doing this very easily.
  • If you read in the csv-file from Tastyworks into Excel, the floating point price values can get converted from US style to German notation. This breaks this script, so please stay with original data from Tastyworks or use a normal editor instead of Excel to change data.
  • Even the tax report is currently in US notation. I recommend to use libreoffice to read in this data and then store it in German notation plus output it into a pdf for tax authorities.
  • One check is to look at the computed value of "account cash balance" from this script and compare it to the official value "Cash Balance" from Tastyworks at https://manage.tastyworks.com/#/accounts/balances. After 550 transactions the final cash balance value is on the cent identical to the computed value.
  • The output-csv file should have the same amount of lines as the input csv. The resulting output is just an enriched form of the input. Please verify all summary output by computing it again from the output-csv file yourself.

Currency gains in German tax law

This description has moved to https://laroche.github.io/private-geldanlage/steuern.html#fremdwaehrungskonten.

TODO

  • Tastytrade API: https://support.tastyworks.com/support/solutions/articles/43000700385-tastytrade-open-api
  • stocks/ETFs
    • Stock splits and spinoffs are not fully supported. (Option strike prices also need to be adjusted.) Example entry:
      • Assumption: stock/option splits are tax neutral.
      • stock splits are now implemented, but not tested at all. Options are not yet supported. Please send in more test data.
    • In German: Bei Aktien-Leerverkäufen (über eine Jahresgrenze hinaus) wird 30 % vom Preis mit der KapESt als Ersatzbemessungsgrundlage besteuert (§ 43a Absatz 2 Satz 7 EStG) und erst mit der Eindeckung ausgeglichen.
    • Complete support for Investmentsteuergesetz (InvStG) 2018: Zahlungen am Anfang vom Jahr (Vorabpauschale).
    • Check if withholding tax is max 15% for dividends for US stocks as per DBA. Warn if e.g. 30% withholding tax is paid and point to missing W8-BEN formular.
    • Complete the list of non-stocks.
    • Does Tastyworks use BRK.B or BRK/B in transaction history? Adjust the list of individual stocks accordingly.
    • If you select to automatically reinvest Dividends, then also partial amounts of stocks are bought. This is currently not supported.
  • Options:
    • If a long option is assigned, the option buy price should be added to the stock price. This is currently not done, but we print a warning message for this case for manual adjustments in this rather rare case.
    • If you sell one option and then buy two of the same options, this transaction should be split for a short option trade and a long option trade for German taxes. This is currently not done, but maybe the checks for the yearly tax report will not work in this case. A real check and split of the transactions needs to be added.
    • A separate bucket for all long-options that expire worthless should be created.
    • If option writing is cash-settled, the cash-settlement needs to go into "Termingeschäftsverluste".
    • Termingeschäftsverluste are capped at 20.000 Euro per year. Make this configurable as couples have double the amount. Depend this automatically on the account name (contains "joint").
  • Does not work with futures.
    • A first quick implementation is done, further checks are needed on real account data. Let me know if you can provide full account data to check/verify.
    • As "Mark-to-Market"-payments/transactions are done, we immediately pay taxes for them, this is not stacked up until futures are sold again. What is a correct way to tax these transactions? Adding this up needs to be done to correctly implement "20k€ Terminverlustgeschäfte" for futures.
  • Cryptos:
    • I am not trading cryptos, so there is only minimal support for them.
    • Cryptos have their own group. pnl is calculated as with normal stocks. No 1-year-taxfree or any other stuff is done.
  • Currency gains:
    • Done: For currency gains, we could also add all fees as tax free by adding a separate booking/transaction.
    • For currency gains tax calculation you can reorder all transactions of one day and use the best order to minimize tax payments. This is currently not done with the current source code.
    • For currency gains you don't pay taxes for negative cash. Review on how this is computed in detail, is it done correctly if going from negative cash to positive cash by splitting a transaction at 0 USD?
    • If you transfer USD to another bank account, you need to choose between tax-neutral and normal tax transaction.
    • In German: Stillhalterpraemien gelten auch nicht als Währungsanschaffung, sondern als Zufluss und sind daher steuer-neutral. Im Source wird dazu die Auszeichnung von Tastyworks als "Sell-To-Open" verwendet.
    • If you are short stock, the additional cash is not really part of "settled cash". Interest payments are not changed by this.
  • Output
    • Output all decimal digits, even if they are 0.
    • For --summary allow excel output depending on filename extension.
    • Output yearly summary data at the beginning of the file, before all individual transactions.
    • Done: Tax csv output: Sort transactions in the order they appear in the summary report.
    • Add columne with automatic annotations. (warnings and error messages from conversion.)
    • Done: Add columne with underlying symbol (dividends and options) and Put/Call (for options).
    • Instead of datetime in one columne, output date and time in two separate columns.
    • Print header with explanation of transaction output. Or additional page for the tax athority with explanations.
    • Generate documentation that can be passed on to the German tax authorities on how the tax is computed and also document on how to fill out the official tax documents.
    • Done: More German words in the output csv file for the German Finanzamt.
    • Can Excel output also include yearly summary data computed from Excel? (How are formulas output?) Can transactions also be grouped per year on different sheets/tabs? A yearly tab.
    • Output open positions (assets) at start/end of year. Also include summary of unrealized gains (including currencies).
    • Is the time output using the correct timezone?
    • Are we rounding output correctly?
      • The EUR amount is internally stored with 4 digits, so if pnl computations are done, we can have slightly different results. Maybe the EUR amount should already be stored rounded to 2 digits for all further computations. As tax data should be computed from the spreadsheet file, this is not really an issue.
      • Since we store some data as float, then output is not always output with 2 digits. E.g. 5.80 is output as 5.8. Storing numbers as string could change this.
    • Output report as pdf in addition to csv: https://github.com/probstj/ccGains
    • Allow new strategy field / cetegory to be filled out.
    • Add an extra notes/comment field that can be edited.
    • Verlustverrechnungstöpfe für Aktien, Sonstiges, Termingeschäfte. Berechnung der zu zahlenden Steuer.
    • If data might be stored locally, you can also use parquet dataformat: pd.to_parquet() and pd.read_parquet().
  • Statistics:
    • "fees" output should also be correct if only one tax year is output
    • Options
      • Add DIT (Days In Trade), average days in trade
      • Compute actual premium per day over the DITs. Graph all sold options over all days in the year to show distribution of sold premium over the course of the year.
      • number of winning trades (total and percentage), average gains
      • cagr = Decimal((quantity * price) / basis) ** Decimal(Decimal(1) / (Decimal(length_held)/Decimal(365.25))) - 1
    • Statistics for stocks/options combined for the same symbol/underlying
    • Specify non-realised gains to know how much tax needs to be paid for current net total.
    • Add performance reviews, graphs based on different time periods and underlyings.
    • How much premium can you keep for option trades. Tastyworks says this should be about 25 % of the premium sold. I am mostly selling only premium (and no spreads) and can keep about 79 % of it as average over many years.
    • How much fees do you pay for your option trades to the broker/exchange compared to your overall profit? This seems to be less than 1.5 % for me in 2021.
    • Show number of trades/transactions history.
    • List of best and worst trades of the year.
    • Check stats output from: https://github.com/Jcuevas97/OrderParser
    • We use the current day while running this script to compute premium/day statistic for the current year. Maybe using the last day of trading activity from the logs would be better?
  • Docu
    • Add images on how to download csv-file within Tastyworks into docu.
    • Translate text output into German.
    • Add docu in German.
  • Demo data and tests
    • Add test data for users to try out.
    • Add testsuite to verify proper operation.
    • Use pandas.isna(x)?
  • If we move currency conversion gains to the end of the loop, we can defer the computation of tax_free into the complete loop. E.g. detection of interest payments as tax_free is currently made too complex.
  • CPU profiling to improve python code
    • How to run:
      • sudo apt-get install graphviz
      • python3 -m cProfile -s cumtime -o profile.pstats tw-pnl.py
      • git clone https://github.com/jrfonseca/gprof2dot
      • ln -s "$PWD"/gprof2dot/gprof2dot.py ~/bin
      • gprof2dot.py -f pstats profile.pstats | dot -Tsvg -o callgraph.svg
    • get_summary and append_yearly_stats(df_append_row) take too much CPU time, how to improve?
      • Keep data in dictionary until final data is complete?
  • Look at other libraries for currency conversion: https://github.com/alexprengere/currencyconverter or https://github.com/flaxandteal/moneypandas
  • Stock splits example:
01/21/2021 12:39 PM,Receive Deliver,Forward Split,TQQQ,Buy,Open,108,,,,,0.00,-9940.86,Forward split: Open 108.0 TQQQ,xxx...00
01/21/2021 12:39 PM,Receive Deliver,Forward Split,TQQQ,Sell,Close,54,,,,,0.00,9940.86,Forward split: Close 54.0 TQQQ,xxx...00