Accrued liabilities are liabilities that reflect expenses that have not yet been paid or logged under accounts payable during an accounting period; in other words, a company's obligation to pay for goods and services that have been provided for which invoices have not yet been received.
There are two general types of Accrued Liabilities: Routine and recurring Accrued Liabilities are types of transactions that occur as a normal, daily part of the business cycle.
If the total wages for the 4 Fridays in June are $1000.00 ($250.00 per week or $50.00 per day), "Imaginary company Ltd." will make routine journal entries for wage payments at the end of each week.
Assuming that the company prepares Financial statements each month, they owe an additional $200.00 in wages for the last four workdays in June (the 27th, 28th, 29th, & 30th).
If the company does not record the 2nd transaction, both Expenses and Liabilities are understated.