The matching principle and the accrual basis of accounting demand that revenue and expenses be recorded in the period they are actually earned or incurred — regardless of when cash happens to move. Four adjusting entries handle the situations where cash timing and earning/incurring timing don't line up: accrued expenses, accrued revenue, and unearned (deferred) revenue.
| Situation | Definition | Adjusting entry |
|---|---|---|
| Accrued Expenses | Expenses that have been incurred but not yet recorded in the books | Dr Expense / Cr Payable (liability) |
| Accrued Salaries | Salaries earned by employees but not yet paid | Dr Salaries Expense / Cr Salaries Payable |
| Accrued Revenue | Revenue earned during the fiscal period but not yet recorded in the books | Dr Accounts Receivable / Cr Revenue |
| Unearned Revenue | Revenue that has been received but is not yet earned | Dr Unearned Revenue (liability) / Cr Revenue, for the portion now earned |
Accrued Salaries is really just a specific, very common example of Accrued Expenses: employees have worked the days, the business owes them for that time, but payday falls in the next period. Unearned Revenue works in the opposite direction from the other three — cash has ALREADY arrived, but the work has not yet been done, so it starts life as a liability (an obligation to either deliver the service or refund the money) and is only moved into revenue as it is actually earned.