rand00 / cryfifo

Calculation of crypto-trade wins/losses the FIFO way for taxation

cryfifo

Note that I take no responsibility for your use of this program in any way. That said, I have used it myself and trust the calculations.

The name stems from

• crying over the FIFO way
• crypto wins & losses calculated the FIFO way

Specifically this program was written to support registering wins & losses for taxation in Denmark, based on csv exports from Kraken.

Note that as the FIFO method is stateful, you need to supply the trade/ledger histories from the beginning of time - or at least since last time you had no asset at all. Concretely this is because the win/loss from sell can depend on a buy arbitrarily long ago.

Usage

cryfifo <TRADES.CSV> <LEDGER.CSV>

Features

• supports CSV exports from Kraken, you need to supply both a trades.csv and ledger.csv
  • the trades is used for FIFO calculation of wins & losses of ordinary trades
    • it is currently also used to get the price of assets near some point in time
  • the ledger is used for margin-trades
• calculations:
  • warnings are printed on stderr in certain situations:
    • when all buys of some asset are consumed, and a sell is left, then the sell is seen as a 'full win' based on current sell price
      • note that these extra assets can be caused by staking gains
    • when sell time is earlier than buy time, then it's also registered as a 'full win'
• reports printed via CLI:
  • the FIFO trades statistics
  • the margin-trades statistics
  • summed trades statistics
  • yearly wins & losses
  • yearly summed wins & losses
  • total summed wins & losses
  • yearly summed tax & deduction
  • yearly taxrate equivalent
  • total summed tax & deduction

Note that a Danish context is used for tax and deduction calculations:

• the danish maximum taxrate of 53% is used
• deduction only happens if losses are over 800 eur (6600 dkk), and in that case the 800 eur is subtracted from the losses
• deduction-rate is set to 26%

Limitations

Currently only supports

• trades between some crypto asset and euro - not between crypto-assets
• a limited set of assets: ada, xtz, zec
• asset/eur conversion-rates are estimated from the nearest trade in time from trades.csv
• warning: there is no special handling of asset-transfers (i.e. not being a buy) to your account
  • this means that the FIFO calculation in this case can be using the wrong price-basis

Make issues/PRs on this repository if you want support for something else.

Compiling

First you need to install the OCaml package manager opam.

Initially setup opam:

opam init
opam switch create 4.14.0

Clone repo:

git clone https://github.com/rand00/cryfifo.git
cd cryfifo

Install dependencies:

opam install dune csv ptime containers ppx_deriving

Compile:

dune build

Copy the resulting binary somewhere in your PATH:

cp ./_build/default/bin/cryfifo.exe ~/bin/cryfifo