seeking minimal ledger budget examples

budget.ledger

; whenever there's a food expense, deduct the same amount from the budget
= /^expenses:food$/
 (budget:food)  -1


1/1 opening balances
 assets:checking          1000
 equity:opening balances

1/2 budget allocation  ; could also do this with an automated posting on income txns
 (budget:food)             200

1/3 purchase food
 expenses:food              20
 assets:checking

1/2 purchase food
 expenses:food              30
 assets:checking

console.sh

$ ledger -f budget.ledger bal
                 950  assets:checking
                 150  budget:food
               -1000  equity:opening balances
                  50  expenses:food
--------------------
                 150
$ ledger -f budget.ledger reg budget
02/01/2014 budget allocation                    (budget:food)               200                   200
03/01/2014 purchase food                        (budget:food)               -20                   180
02/01/2014 purchase food                        (budget:food)               -30                   150
$