Introduction to Beancount.io

2019-09-07 00:23

Why bookkeeping or tracking assets?

Do you manage your investments using a spreadsheet? If so, you should check out beancount.io – an online investment tracker that makes it easy to keep track of your stock and crypto portfolios. Beancount.io is easy to use, and offers a wide range of features that make it the perfect tool for investment tracking. In this post, we’ll introduce you to beancount.io and show you how to get started.

Expenses

Income Statement

Balance Sheet

Double-entry Bookkeeping for Correctness

Beancount is built upon double-entry accounting, a widespread technique to track financial information.

To ensure the accuracy and internalize the error detection into the system, double-entry bookkeeping requires every entry to an account has at-least a corresponding entry to a different account. One transaction involves at least two accounts with two operations - debit (+) and credit (-).

1970-01-01 open Income:BeancountCorp
1970-01-01 open Assets:Cash
1970-01-01 open Expenses:Food
1970-01-01 open Assets:Receivables:Alice
1970-01-01 open Assets:Receivables:Bob
1970-01-01 open Assets:Receivables:Charlie
1970-01-01 open Liabilities:CreditCard

2019-05-31 * "BeancountCorp" "Salary of May 15th to May 31st"
  Income:BeancountCorp               -888 USD
  Assets:Cash                         888 USD

2019-07-12 * "Popeyes chicken sandwiches" "dinner with Alice, Bob, and Charlie"
  Expenses:Food 20 USD
  Assets:Receivables:Alice 20 USD
  Assets:Receivables:Bob 20 USD
  Assets:Receivables:Charlie 20 USD
  Liabilities:CreditCard -80 USD

As you can see in the two examples above, every transaction must fulfill the accounting equation.

Assets = Liabilities + Equity(aka Net Assets)

We used the Beancount syntax by Martin Blais and the web project Fava by Jakob Schnitzer to build this website. And it will alert you if any transaction has any legs not summing to zero.

Error Alert

Now you understand how we enforce the correctness of the ledger. But you may ask what are those “accounts”?

Accounts for money as buckets for water

Thinking your assets as water running in and out of different buckets and “accounts” are those buckets holding your money. With double-entry bookkeeping, it becomes obvious how money is flowing across different accounts, just like how water is flowing across different buckets.

Beancount.io introduces five kinds of accounts.

Income — Its amount is always negative or in debit. This is because you are making money, and then the money is debiting from “Income” account and crediting to your “Assets.”
Expenses — Its amount is always positive or in credit. This is because you are spending money, and the money is flowing from the “Assets” or “Liabilities” to the “Expenses.”
Liabilities — Its amount is positive or zero. Your credit card liabilities are a good example, which rises and falls in cycles.
Assets — Its amount is positive or zero. Your cash or houses are always worthing some prices.
Equity — Your net assets. The system will calculate automatically for you. Equity = Assets - Liabilities and it reflects how wealthy you are.

Now you can open your customized accounts with those keywords above:

1970-01-01 open Assets:Cash
1970-01-01 open Assets:Stock:Robinhood
1970-01-01 open Assets:Crypto:Coinbase
1970-01-01 open Expenses:Transportation:Taxi
1970-01-01 open Equity:OpeningBalance

Commodities: Tracking your investment

Yes, you can track your investment with beancount.io. For example, we buy 10 Bitcoins at the price of $100 in 2014:

2014-08-08 * "Buy 10 Bitcoin"
  Assets:Trade:Cash -1000.00 USD
  Assets:Trade:Positions  10 BTC {100.00 USD}

And then three years later, you sell them (originally with costs of $100 per unit annotated with {100.00 USD}) at the price of $10,000 per unit annotated with @ 10,000.00 USD.

2017-12-12 * "Sell 2 Bitcoin"
  Assets:Trade:Positions                   -2 BTC {100.00 USD} @ 10,000.00 USD
  Assets:Trade:Cash                          20,000.00 USD
  Income:Trade:PnL                          -19,800.00 USD

Or the same transaction with @@ 20,000.00 USD means that at the price of $20,000 in total.

2017-12-12 * "Sell 2 Bitcoin"
  Assets:Trade:Positions                   -2 BTC {100.00 USD} @@ 20,000.00 USD
  Assets:Trade:Cash                          20,000.00 USD
  Income:Trade:PnL                          -19,800.00 USD

The sum of all legs of the transaction, including -2 BTC {100.00 USD}, are still, as always, zero.

The costs {100.00 USD} tag is important because you might have bought the same commodity at different costs.

100 BTC {10.00 USD, 2012-08-08}
10 BTC {100.00 USD, 2014-08-08}

If you want to simplify the process, you can set up the account at the beginning with FIFO or LIFO. FIFO stands for first in, first out, while LIFO stands for last in, first out. In the US, IRS uses FIFO to calculate your PnL and tax accordingly.

1970-01-01 open Assets:Trade:Positions "FIFO"

And then when you sell it in shorthand like -2 BTC {}, beancount will apply FIFO strategy automatically and sell the oldest commodity.

Beancount.io

Beancount.io is such a cloud service for recording your financial transactions in text files, visualize them into financial statements (income statement, balance sheet, trial balance, etc.), and helps you live a better financial life. Sign up now - It’s in Promotional Period and Free!