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Simon Michael cfdde062eb clarify directive semantics

2018-05-03 21:20:29 -07:00

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hledger_journal(5) hledger version

web({{ docversionlinks({{journal}}) toc }}) man({{

NAME

Journal - hledger’s default file format, representing a General Journal

DESCRIPTION

}})

hledger’s usual data source is a plain text file containing journal entries in hledger journal format. This file represents a standard accounting general journal. I use file names ending in .journal, but that’s not required. The journal file contains a number of transaction entries, each describing a transfer of money (or any commodity) between two or more named accounts, in a simple format readable by both hledger and humans.

hledger’s journal format is a compatible subset, mostly, of ledger’s journal format, so hledger can work with compatible ledger journal files as well. It’s safe, and encouraged, to run both hledger and ledger on the same journal file, eg to validate the results you’re getting.

You can use hledger without learning any more about this file; just use the add or web commands to create and update it. Many users, though, also edit the journal file directly with a text editor, perhaps assisted by the helper modes for emacs or vim.

Here’s an example:

; A sample journal file. This is a comment.

2008/01/01 income               ; <- transaction's first line starts in column 0, contains date and description
    assets:bank:checking  $1    ; <- posting lines start with whitespace, each contains an account name
    income:salary        $-1    ;    followed by at least two spaces and an amount

2008/06/01 gift
    assets:bank:checking  $1    ; <- at least two postings in a transaction
    income:gifts         $-1    ; <- their amounts must balance to 0

2008/06/02 save
    assets:bank:saving    $1
    assets:bank:checking        ; <- one amount may be omitted; here $-1 is inferred

2008/06/03 eat & shop           ; <- description can be anything
    expenses:food         $1
    expenses:supplies     $1    ; <- this transaction debits two expense accounts
    assets:cash                 ; <- $-2 inferred

2008/10/01 take a loan
    assets:bank:checking  $1
    liabilities:debts    $-1

2008/12/31 * pay off            ; <- an optional * or ! after the date means "cleared" (or anything you want)
    liabilities:debts     $1
    assets:bank:checking

FILE FORMAT

Transactions

Transactions are movements of some quantity of commodities between named accounts. Each transaction is represented by a journal entry beginning with a simple date in column 0. This can be followed by any of the following, separated by spaces:

(optional) a status character (empty, !, or *)
(optional) a transaction code (any short number or text, enclosed in parentheses)
(optional) a transaction description (any remaining text until end of line or a semicolon)
(optional) a transaction comment (any remaining text following a semicolon until end of line)

Then comes zero or more (but usually at least 2) indented lines representing…

Postings

A posting is an addition of some amount to, or removal of some amount from, an account. Each posting line begins with at least one space or tab (2 or 4 spaces is common), followed by:

(optional) a status character (empty, !, or *), followed by a space
(required) an account name (any text, optionally containing single spaces, until end of line or a double space)
(optional) two or more spaces or tabs followed by an amount.

Positive amounts are being added to the account, negative amounts are being removed.

The amounts within a transaction must always sum up to zero. As a convenience, one amount may be left blank; it will be inferred so as to balance the transaction.

Be sure to note the unusual two-space delimiter between account name and amount. This makes it easy to write account names containing spaces. But if you accidentally leave only one space (or tab) before the amount, the amount will be considered part of the account name.

Dates

Simple dates

Within a journal file, transaction dates use Y/M/D (or Y-M-D or Y.M.D) Leading zeros are optional. The year may be omitted, in which case it will be inferred from the context - the current transaction, the default year set with a default year directive, or the current date when the command is run. Some examples: 2010/01/31, 1/31, 2010-01-31, 2010.1.31.

Secondary dates

Real-life transactions sometimes involve more than one date - eg the date you write a cheque, and the date it clears in your bank. When you want to model this, eg for more accurate balances, you can specify individual posting dates, which I recommend. Or, you can use the secondary dates (aka auxiliary/effective dates) feature, supported for compatibility with Ledger.

A secondary date can be written after the primary date, separated by an equals sign. The primary date, on the left, is used by default; the secondary date, on the right, is used when the --date2 flag is specified (--aux-date or --effective also work).

The meaning of secondary dates is up to you, but it’s best to follow a consistent rule. Eg write the bank’s clearing date as primary, and when needed, the date the transaction was initiated as secondary.

Here’s an example. Note that a secondary date will use the year of the primary date if unspecified.

2010/2/23=2/19 movie ticket
  expenses:cinema                   $10
  assets:checking

$ hledger register checking
2010/02/23 movie ticket         assets:checking                $-10         $-10

$ hledger register checking --date2
2010/02/19 movie ticket         assets:checking                $-10         $-10

Secondary dates require some effort; you must use them consistently in your journal entries and remember whether to use or not use the --date2 flag for your reports. They are included in hledger for Ledger compatibility, but posting dates are a more powerful and less confusing alternative.

Posting dates

You can give individual postings a different date from their parent transaction, by adding a posting comment containing a tag (see below) like date:DATE. This is probably the best way to control posting dates precisely. Eg in this example the expense should appear in May reports, and the deduction from checking should be reported on 6/1 for easy bank reconciliation:

2015/5/30
    expenses:food     $10   ; food purchased on saturday 5/30
    assets:checking         ; bank cleared it on monday, date:6/1

$ hledger -f t.j register food
2015/05/30                      expenses:food                  $10           $10

$ hledger -f t.j register checking
2015/06/01                      assets:checking               $-10          $-10

DATE should be a simple date; if the year is not specified it will use the year of the transaction’s date. You can set the secondary date similarly, with date2:DATE2. The date: or date2: tags must have a valid simple date value if they are present, eg a date: tag with no value is not allowed.

Ledger’s earlier, more compact bracketed date syntax is also supported: [DATE], [DATE=DATE2] or [=DATE2]. hledger will attempt to parse any square-bracketed sequence of the 0123456789/-.= characters in this way. With this syntax, DATE infers its year from the transaction and DATE2 infers its year from DATE.

Status

Transactions, or individual postings within a transaction, can have a status mark, which is a single character before the transaction description or posting account name, separated from it by a space, indicating one of three statuses:

mark	status
	unmarked
`!`	pending
`*`	cleared

When reporting, you can filter by status with the -U/--unmarked, -P/--pending, and -C/--cleared flags; or the status:, status:!, and status:* queries; or the U, P, C keys in hledger-ui.

Note, in Ledger and in older versions of hledger, the “unmarked” state is called “uncleared”. As of hledger 1.3 we have renamed it to unmarked for clarity.

To replicate Ledger and old hledger’s behaviour of also matching pending, combine -U and -P.

Status marks are optional, but can be helpful eg for reconciling with real-world accounts. Some editor modes provide highlighting and shortcuts for working with status. Eg in Emacs ledger-mode, you can toggle transaction status with C-c C-e, or posting status with C-c C-c.

What “uncleared”, “pending”, and “cleared” actually mean is up to you. Here’s one suggestion:

status	meaning
uncleared	recorded but not yet reconciled; needs review
pending	tentatively reconciled (if needed, eg during a big reconciliation)
cleared	complete, reconciled as far as possible, and considered correct

With this scheme, you would use -PC to see the current balance at your bank, -U to see things which will probably hit your bank soon (like uncashed checks), and no flags to see the most up-to-date state of your finances.

Description

A transaction’s description is the rest of the line following the date and status mark (or until a comment begins). Sometimes called the “narration” in traditional bookkeeping, it can be used for whatever you wish, or left blank. Transaction descriptions can be queried, unlike comments.

Payee and note

You can optionally include a | (pipe) character in a description to subdivide it into a payee/payer name on the left and additional notes on the right. This may be worthwhile if you need to do more precise querying and pivoting by payee.

Account names

Account names typically have several parts separated by a full colon, from which hledger derives a hierarchical chart of accounts. They can be anything you like, but in finance there are traditionally five top-level accounts: assets, liabilities, income, expenses, and equity.

Account names may contain single spaces, eg: assets:accounts receivable. Because of this, they must always be followed by two or more spaces (or newline).

Account names can be aliased.

Amounts

After the account name, there is usually an amount. Important: between account name and amount, there must be two or more spaces.

Amounts consist of a number and (usually) a currency symbol or commodity name. Some examples:

2.00001
$1
4000 AAPL
3 "green apples"
-$1,000,000.00
INR 9,99,99,999.00
EUR -2.000.000,00
1 999 999.9455
EUR 1E3
1000E-6s

As you can see, the amount format is somewhat flexible:

amounts are a number (the “quantity”) and optionally a currency symbol/commodity name (the “commodity”).
the commodity is a symbol, word, or phrase, on the left or right, with or without a separating space. If the commodity contains numbers, spaces or non-word punctuation it must be enclosed in double quotes.
negative amounts with a commodity on the left can have the minus sign before or after it
digit groups (thousands, or any other grouping) can be separated by space or comma or period and should be used as separator between all groups
decimal part can be separated by comma or period and should be different from digit groups separator
scientific E-notation is allowed. Be careful not to use a digit group separator character in scientific notation, as it’s not supported and it might get mistaken for a decimal point. (Declaring the digit group separator character explicitly with a commodity directive will prevent this.)

You can use any of these variations when recording data. However, there is some ambiguous way of representing numbers like $1.000 and $1,000 both may mean either one thousand or one dollar. By default hledger will assume that this is sole delimiter is used only for decimals. On the other hand commodity format declared prior to that line will help to resolve that ambiguity differently:

commodity $1,000.00

2017/12/25 New life of Scrooge
    expenses:gifts  $1,000
    assets

Though journal may contain mixed styles to represent amount, when hledger displays amounts, it will choose a consistent format for each commodity. (Except for price amounts, which are always formatted as written). The display format is chosen as follows:

if there is a commodity directive specifying the format, that is used
otherwise the format is inferred from the first posting amount in that commodity in the journal, and the precision (number of decimal places) will be the maximum from all posting amounts in that commmodity
or if there are no such amounts in the journal, a default format is used (like $1000.00).

Price amounts and amounts in D directives usually don’t affect amount format inference, but in some situations they can do so indirectly. (Eg when D’s default commodity is applied to a commodity-less amount, or when an amountless posting is balanced using a price’s commodity, or when -V is used.) If you find this causing problems, set the desired format with a commodity directive.

Virtual Postings

When you parenthesise the account name in a posting, we call that a virtual posting, which means:

it is ignored when checking that the transaction is balanced
it is excluded from reports when the --real/-R flag is used, or the real:1 query.

You could use this, eg, to set an account’s opening balance without needing to use the equity:opening balances account:

1/1 special unbalanced posting to set initial balance
  (assets:checking)   $1000

When the account name is bracketed, we call it a balanced virtual posting. This is like an ordinary virtual posting except the balanced virtual postings in a transaction must balance to 0, like the real postings (but separately from them). Balanced virtual postings are also excluded by --real/-R or real:1.

1/1 buy food with cash, and update some budget-tracking subaccounts elsewhere
  expenses:food                   $10
  assets:cash                    $-10
  [assets:checking:available]     $10
  [assets:checking:budget:food]  $-10

Virtual postings have some legitimate uses, but those are few. You can usually find an equivalent journal entry using real postings, which is more correct and provides better error checking.

Balance Assertions

hledger supports Ledger-style balance assertions in journal files. These look like =EXPECTEDBALANCE following a posting’s amount. Eg in this example we assert the expected dollar balance in accounts a and b after each posting:

2013/1/1
  a   $1  =$1
  b       =$-1

2013/1/2
  a   $1  =$2
  b  $-1  =$-2

After reading a journal file, hledger will check all balance assertions and report an error if any of them fail. Balance assertions can protect you from, eg, inadvertently disrupting reconciled balances while cleaning up old entries. You can disable them temporarily with the --ignore-assertions flag, which can be useful for troubleshooting or for reading Ledger files.

Assertions and ordering

hledger sorts an account’s postings and assertions first by date and then (for postings on the same day) by parse order. Note this is different from Ledger, which sorts assertions only by parse order. (Also, Ledger assertions do not see the accumulated effect of repeated postings to the same account within a transaction.)

So, hledger balance assertions keep working if you reorder differently-dated transactions within the journal. But if you reorder same-dated transactions or postings, assertions might break and require updating. This order dependence does bring an advantage: precise control over the order of postings and assertions within a day, so you can assert intra-day balances.

Assertions and included files

With included files, things are a little more complicated. Including preserves the ordering of postings and assertions. If you have multiple postings to an account on the same day, split across different files, and you also want to assert the account’s balance on the same day, you’ll have to put the assertion in the right file.

Assertions and multiple -f options

Balance assertions don’t work well across files specified with multiple -f options. Use include or concatenate the files instead.

Assertions and commodities

The asserted balance must be a simple single-commodity amount, and in fact the assertion checks only this commodity’s balance within the (possibly multi-commodity) account balance. We could call this a partial balance assertion. This is compatible with Ledger, and makes it possible to make assertions about accounts containing multiple commodities.

To assert each commodity’s balance in such a multi-commodity account, you can add multiple postings (with amount 0 if necessary). But note that no matter how many assertions you add, you can’t be sure the account does not contain some unexpected commodity. (We’ll add support for this kind of total balance assertion if there’s demand.)

Assertions and subaccounts

Balance assertions do not count the balance from subaccounts; they check the posted account’s exclusive balance. For example:

1/1
  checking:fund   1 = 1  ; post to this subaccount, its balance is now 1
  checking        1 = 1  ; post to the parent account, its exclusive balance is now 1
  equity

The balance report’s flat mode shows these exclusive balances more clearly:

$ hledger bal checking --flat
                   1  checking
                   1  checking:fund
--------------------
                   2

Assertions and virtual postings

Balance assertions are checked against all postings, both real and virtual. They are not affected by the --real/-R flag or real: query.

Balance Assignments

Ledger-style balance assignments are also supported. These are like balance assertions, but with no posting amount on the left side of the equals sign; instead it is calculated automatically so as to satisfy the assertion. This can be a convenience during data entry, eg when setting opening balances:

; starting a new journal, set asset account balances 
2016/1/1 opening balances
  assets:checking            = $409.32
  assets:savings             = $735.24
  assets:cash                 = $42
  equity:opening balances

or when adjusting a balance to reality:

; no cash left; update balance, record any untracked spending as a generic expense
2016/1/15
  assets:cash    = $0
  expenses:misc

The calculated amount depends on the account’s balance in the commodity at that point (which depends on the previously-dated postings of the commodity to that account since the last balance assertion or assignment). Note that using balance assignments makes your journal a little less explicit; to know the exact amount posted, you have to run hledger or do the calculations yourself, instead of just reading it.

Transaction prices

Within a transaction, you can note an amount’s price in another commodity. This can be used to document the cost (in a purchase) or selling price (in a sale). For example, transaction prices are useful to record purchases of a foreign currency. Note transaction prices are fixed at the time of the transaction, and do not change over time. See also market prices, which represent prevailing exchange rates on a certain date.

There are several ways to record a transaction price:

Write the price per unit, as @ UNITPRICE after the amount:

2009/1/1
  assets:euros     €100 @ $1.35  ; one hundred euros purchased at $1.35 each
  assets:dollars                 ; balancing amount is -$135.00

Write the total price, as @@ TOTALPRICE after the amount:

2009/1/1
  assets:euros     €100 @@ $135  ; one hundred euros purchased at $135 for the lot
  assets:dollars

Specify amounts for all postings, using exactly two commodities, and let hledger infer the price that balances the transaction:
```
2009/1/1
  assets:euros     €100          ; one hundred euros purchased
  assets:dollars  $-135          ; for $135
```

(Ledger users: Ledger uses a different syntax for fixed prices, {=UNITPRICE}, which hledger currently ignores).

Use the -B/--cost flag to convert amounts to their transaction price’s commodity, if any. (mnemonic: “B” is from “cost Basis”, as in Ledger). Eg here is how -B affects the balance report for the example above:

$ hledger bal -N --flat
               $-135  assets:dollars
                €100  assets:euros
$ hledger bal -N --flat -B
               $-135  assets:dollars
                $135  assets:euros    # <- the euros' cost

Note -B is sensitive to the order of postings when a transaction price is inferred: the inferred price will be in the commodity of the last amount. So if example 3’s postings are reversed, while the transaction is equivalent, -B shows something different:

2009/1/1
  assets:dollars  $-135               ; 135 dollars sold
  assets:euros     €100               ; for 100 euros

$ hledger bal -N --flat -B
               €-100  assets:dollars  # <- the dollars' selling price
                €100  assets:euros

Comments

Lines in the journal beginning with a semicolon (;) or hash (#) or star (*) are comments, and will be ignored. (Star comments cause org-mode nodes to be ignored, allowing emacs users to fold and navigate their journals with org-mode or orgstruct-mode.)

You can attach comments to a transaction by writing them after the description and/or indented on the following lines (before the postings). Similarly, you can attach comments to an individual posting by writing them after the amount and/or indented on the following lines. Transaction and posting comments must begin with a semicolon (;).

Some examples:

# a file comment

; also a file comment

comment
This is a multiline file comment,
which continues until a line
where the "end comment" string
appears on its own (or end of file).
end comment

2012/5/14 something  ; a transaction comment
    ; the transaction comment, continued
    posting1  1  ; a comment for posting 1
    posting2
    ; a comment for posting 2
    ; another comment line for posting 2
; a file comment (because not indented)

You can also comment larger regions of a file using comment and end comment directives.

Directives

A directive is a line in the journal beginning with a special keyword, that influences how the journal is processed. Some directives may also have indented sub-directives on the following lines (commodity).

Directive scope, multiple files

Directives vary in which journal entries they affect:

some form a begin/end pair, and affect the enclosed journal entries (and included files):
alias & end aliases; comment & end comment
some affect the subsequent journal entries (and included files) in the current file:
alias or comment without an end directive, Y
some affect all journal entries (and included files) anywhere in the current file:
account, commodity, D, P.

It’s important to note that directives can affect the current file and child (included) files, but not sibling or parent (including) files. This is by design, for simplicity and predictability of reports, but it can be surprising at times. Eg, in:

hledger -f a.prices -f b.journal

the prices defined in a.prices will not be effective in b.journal (a sibling file). Instead, you have to include (or inline) a.prices in b.journal, or vice versa.

Comment blocks

A line containing just comment starts a commented region of the file, and a line containing just end comment (or the end of the current file) ends it. See also comments.

Including other files

You can pull in the content of additional files by writing an include directive, like this:

include path/to/file.journal

If the path does not begin with a slash, it is relative to the current file. Glob patterns (*) are not currently supported.

The include directive can only be used in journal files. It can include journal, timeclock or timedot files, but not CSV files.

Default year

You can set a default year to be used for subsequent dates which don’t specify a year. This is a line beginning with Y followed by the year. Eg:

Y2009      ; set default year to 2009

12/15      ; equivalent to 2009/12/15
  expenses  1
  assets

Y2010      ; change default year to 2010

2009/1/30  ; specifies the year, not affected
  expenses  1
  assets

1/31       ; equivalent to 2010/1/31
  expenses  1
  assets

Declaring commodities

The commodity directive declares commodities which may be used in the journal (though currently we do not enforce this). It may be written on a single line, like this:

; commodity EXAMPLEAMOUNT

; display AAAA amounts with the symbol on the right, space-separated,
; using period as decimal point, with four decimal places, and
; separating thousands with comma.
commodity 1,000.0000 AAAA

or on multiple lines, using the “format” subdirective. In this case the commodity symbol appears twice and should be the same in both places:

; commodity SYMBOL
;   format EXAMPLEAMOUNT

; display indian rupees with currency name on the left,
; thousands, lakhs and crores comma-separated,
; period as decimal point, and two decimal places.
commodity INR
  format INR 9,99,99,999.00

Commodity directives have a second purpose: they define the standard display format for amounts in the commodity. Normally the display format is inferred from journal entries, but this can be unpredictable; declaring it with a commodity directive overrides this and removes ambiguity. Towards this end, amounts in commodity directives must always be written with a decimal point (a period or comma, followed by 0 or more decimal digits).

Default commodity

The D directive sets a default commodity (and display format), to be used for amounts without a commodity symbol (ie, plain numbers). (Note this differs from Ledger’s default commodity directive.) The commodity and display format will be applied to all subsequent commodity-less amounts, or until the next D directive.

# commodity-less amounts should be treated as dollars
# (and displayed with symbol on the left, thousands separators and two decimal places)
D $1,000.00

1/1
  a     5    ; <- commodity-less amount, becomes $1
  b

As with the commodity directive, the amount must always be written with a decimal point.

Market prices

The P directive declares a market price, which is an exchange rate between two commodities on a certain date. (In Ledger, they are called “historical prices”.) These are often obtained from a stock exchange, cryptocurrency exchange, or the foreign exchange market.

Here is the format:

P DATE COMMODITYA COMMODITYBAMOUNT

DATE is a simple date
COMMODITYA is the symbol of the commodity being priced
COMMODITYBAMOUNT is an amount (symbol and quantity) in a second commodity, giving the price in commodity B of one unit of commodity A.

These two market price directives say that one euro was worth 1.35 US dollars during 2009, and $1.40 from 2010 onward:

P 2009/1/1 € $1.35
P 2010/1/1 € $1.40

The -V/--value flag can be used to convert reported amounts to another commodity using these prices.

Declaring accounts

The account directive predeclares account names. The simplest form is account ACCTNAME, eg:

account assets:bank:checking

Currently this mainly helps with account name autocompletion in eg hledger add, hledger-iadd, hledger-web, and ledger-mode.
In future it will also help detect misspelled accounts.

Account names can be followed by a numeric account code:

account assets                  1000
account assets:bank:checking    1110
account liabilities             2000
account revenues                4000
account expenses                6000

This affects account display order in reports: accounts with codes are listed before accounts without codes, in increasing code order. (Otherwise, accounts are listed alphabetically.) Account codes should be all numeric digits, unique, and separated from the account name by at least two spaces (since account names may contain single spaces). By convention, often the first digit indicates the type of account, as in this numbering scheme and the example above. In future, we might use this to recognize account types.

An account directive can also have indented subdirectives following it, which are currently ignored. Here is the full syntax:

; account ACCTNAME  [OPTIONALCODE]
;   [OPTIONALSUBDIRECTIVES]

account assets:bank:checking   1110
  a comment
  some-tag:12345

Rewriting accounts

You can define aliases which rewrite your account names (after reading the journal, before generating reports). hledger’s account aliases can be useful for:

expanding shorthand account names to their full form, allowing easier data entry and a less verbose journal
adapting old journals to your current chart of accounts
experimenting with new account organisations, like a new hierarchy or combining two accounts into one
customising reports

Basic aliases

To set an account alias, use the alias directive in your journal file. This affects all subsequent journal entries in the current file or its included files. The spaces around the = are optional:

alias OLD = NEW

Or, you can use the --alias 'OLD=NEW' option on the command line. This affects all entries. It’s useful for trying out aliases interactively.

OLD and NEW are full account names. hledger will replace any occurrence of the old account name with the new one. Subaccounts are also affected. Eg:

alias checking = assets:bank:wells fargo:checking
# rewrites "checking" to "assets:bank:wells fargo:checking", or "checking:a" to "assets:bank:wells fargo:checking:a"

Regex aliases

There is also a more powerful variant that uses a regular expression, indicated by the forward slashes:

alias /REGEX/ = REPLACEMENT

or --alias '/REGEX/=REPLACEMENT'.

REGEX is a case-insensitive regular expression. Anywhere it matches inside an account name, the matched part will be replaced by REPLACEMENT. If REGEX contains parenthesised match groups, these can be referenced by the usual numeric backreferences in REPLACEMENT. Eg:

alias /^(.+):bank:([^:]+)(.*)/ = \1:\2 \3
# rewrites "assets:bank:wells fargo:checking" to  "assets:wells fargo checking"

Also note that REPLACEMENT continues to the end of line (or on command line, to end of option argument), so it can contain trailing whitespace.

Multiple aliases

You can define as many aliases as you like using directives or command-line options. Aliases are recursive - each alias sees the result of applying previous ones. (This is different from Ledger, where aliases are non-recursive by default). Aliases are applied in the following order:

alias directives, most recently seen first (recent directives take precedence over earlier ones; directives not yet seen are ignored)
alias options, in the order they appear on the command line

`end aliases`

You can clear (forget) all currently defined aliases with the end aliases directive:

end aliases

Default parent account

You can specify a parent account which will be prepended to all accounts within a section of the journal. Use the apply account and end apply account directives like so:

apply account home

2010/1/1
    food    $10
    cash

end apply account

which is equivalent to:

2010/01/01
    home:food           $10
    home:cash          $-10

If end apply account is omitted, the effect lasts to the end of the file. Included files are also affected, eg:

apply account business
include biz.journal
end apply account
apply account personal
include personal.journal

Prior to hledger 1.0, legacy account and end spellings were also supported.

Periodic transactions

Periodic transaction rules (enabled by --forecast or --budget) describe recurring transactions. They look like a transaction where the first line is a tilde (~) followed by a period expression (mnemonic: ~ is like a recurring sine wave):

~ weekly
  assets:bank:checking   $400 ; paycheck
  income:acme inc

Periodic transactions have a dual purpose:

With --forecast, each periodic transaction rule generates future transactions, recurring at the specified interval, which can be seen in reports. Forecast transactions begin the day after the latest recorded journal transaction (or today, if there are no transactions) and end 6 months from today (or at the report end date, if specified).
With --budget (supported by the balance command), each periodic transaction rule declares recurring budget goals for the specified accounts, which can be seen in budget reports. Eg the example above declares the goal of receiving $400 from income:acme inc (and also, depositing $400 into assets:bank:checking) every week.

(Actually, you can generate one-off transactions too, by writing a period expression with no report interval.)

For more details, see: balance: Budget report and Cookbook: Budgeting and Forecasting.

Automated postings

Automated postings (enabled by --auto) are postings added automatically by rule to certain transactions. An automated posting rule looks like a transaction where the first line is an equal sign (=) followed by a query (mnemonic: = tests for matching transactions, and also looks like posting lines):

= expenses:gifts
    budget:gifts  *-1
    assets:budget  *1

The posting amounts can be of the form *N, which means “the amount of the matched transaction’s first posting, multiplied by N”. They can also be ordinary fixed amounts. Fixed amounts with no commodity symbol will be given the same commodity as the matched transaction’s first posting.

This example adds a corresponding (unbalanced) budget posting to every transaction involving the expenses:gifts account:

= expenses:gifts
    (budget:gifts)  *-1

2017-12-14
  expenses:gifts  $20
  assets

$ hledger print --auto
2017/12/14
    expenses:gifts             $20
    (budget:gifts)            $-20
    assets

Like postings recorded by hand, automated postings participate in transaction balancing, missing amount inference and balance assertions.

EDITOR SUPPORT

Add-on modes exist for various text editors, to make working with journal files easier. They add colour, navigation aids and helpful commands. For hledger users who edit the journal file directly (the majority), using one of these modes is quite recommended.

These were written with Ledger in mind, but also work with hledger files:

Editor
Emacs	http://www.ledger-cli.org/3.0/doc/ledger-mode.html
Vim	https://github.com/ledger/vim-ledger
Sublime Text	https://github.com/ledger/ledger/wiki/Editing-Ledger-files-with-Sublime-Text-or-RubyMine
Textmate	https://github.com/ledger/ledger/wiki/Using-TextMate-2
Text Wrangler	https://github.com/ledger/ledger/wiki/Editing-Ledger-files-with-TextWrangler
Visual Studio Code	https://marketplace.visualstudio.com/items?itemName=mark-hansen.hledger-vscode

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