the expenses are done, but not paid in the accounting year. The accounting treatment for this

Related expenses a/c Dr
To outstanding expense a/c
( Being outstanding expense...
Example: 
Salary a/c dr
To Outstanding salary a/c
(being salary unpaid)
 
 
This type of account will be posted in the debit side of trading or p/L account, and added in the current liabilities of balance sheet.