Flexibly import bank account CSV files into Ledger for command-line accounting
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Note: Reckon is currently unmaintained. If you'd like to take over this project, please let me know!

Reckon automagically converts CSV files for use with the command-line accounting tool Ledger. It also helps you to select the correct accounts associated with the CSV data using Bayesian machine learning.


Assuming you have Ruby and Rubygems installed on your system, simply run

(sudo) gem install reckon

Example Usage

First, login to your bank and export your transaction data as a CSV file.

To see how the CSV parses:

reckon -f bank.csv -p

If your CSV file has a header on the first line, include --contains-header.

To convert to ledger format and label everything, do:

reckon -f bank.csv -o output.dat

To have reckon learn from an existing ledger file, provide it with -l:

reckon -f bank.csv -l 2010.dat -o output.dat

Learn more:

> reckon -h

Usage: Reckon.rb [options]

-f, --file FILE                  The CSV file to parse
-a, --account name               The Ledger Account this file is for
-v, --[no-]verbose               Run verbosely
-i, --inverse                    Use the negative of each amount
-p, --print-table                Print out the parsed CSV in table form
-o, --output-file FILE           The ledger file to append to
-l, --learn-from FILE            An existing ledger file to learn accounts from
    --ignore-columns 1,2,5
                                 Columns to ignore in the CSV file - the first column is column 1
    --contains-header [N]
                                 The first row of the CSV is a header and should be skipped. Optionally add the number of rows to skip.
    --csv-separator ','
                                 Separator for parsing the CSV - default is comma.
                                 Use comma instead of period to deliminate dollars from cents when parsing ($100,50 instead of $100.50)
    --encoding 'UTF-8'
                                 Specify an encoding for the CSV file; not usually needed
-c, --currency '$'               Currency symbol to use, defaults to $ (£, EUR)
    --date-format '%d/%m/%Y'
                                 Force the date format (see Ruby DateTime strftime)
-u, --unattended                 Don't ask questions and guess all the accounts automatically. Used with --learn-from or --account-tokens options.
-t, --account-tokens FILE        YAML file with manually-assigned tokens for each account (see README)
    --default-into-account name
                                 Default into account
    --default-outof-account name
                                 Default 'out of' account
                                 If --currency should be used as a suffix. Defaults to false.
-h, --help                       Show this message
    --version                    Show version

If you find CSV files that it can't parse, send me examples or pull requests!

Unattended mode

You can run reckon in a non-interactive mode. To guess the accounts reckon can use an existing ledger file or a token file with keywords.

reckon --unattended -l 2010.dat -f bank.csv -o ledger.dat

reckon --unattended --account-tokens tokens.yaml -f bank.csv -o ledger.dat

Here's an example of tokens.yaml:

    - 'LÖN'
    - 'Salary'
    - 'Comission'
    - 'MasterCard'
    - '0011223344' # Landlord bank number
    - /hosting/i # This regexp will catch descriptions such as WebHosting or filehosting
'[Internal:Transfer]': # Virtual account
  - '4433221100' # Your own account number

If reckon can not guess the accounts it will use Income:Unknown or Expenses:Unknown names. You can override them with --default_outof_account and --default_into_account options.

Note on Patches/Pull Requests

  • Fork the project.
  • Make your feature addition or bug fix.
  • Add tests for it. This is important so I don't break it in a future version unintentionally.
  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
  • Send me a pull request. Bonus points for topic branches.


Copyright (c) 2013 Andrew Cantino. See LICENSE for details.

Thanks to @BlackEdder for many contributions!