Time Period Concept:
Fiscal periods for a business’ income statements need to be of equal lengths of time.
The Revenue Recognition Principle is a GAAP that says revenue must be recognized at the time the transaction is conducted.
In other words, the revenue is recorded once the service is provided, regardless of whether cash is received or not
Matching Principle
Expense must be recorded in the fiscal period that matches the revenue that they helped to earn
Example: An advertisement costing $1,000 was used for a sale on December 30th, 2017. However, the expense wasn’t paid until January 10th, 2018.