Of the following accounts, which is not a liability account?

The correct choice in identifying an account that is not a liability is the employer share of payroll taxes. This account reflects an expense rather than a liability. The employer’s share of payroll taxes represents the cost incurred by the employer based on wages paid to employees. While it is related to liabilities in the sense that it will eventually be remitted to the government, the expense is recognized at the time of payroll, impacting the income statement, rather than being recorded as a liability until it is actually due for payment.

In contrast, accounts such as accounts payable, contributions owed to a company benefit plan, and union dues deducted from pay but not yet paid to the union are all considered liability accounts. These accounts typically reflect amounts that the company owes to external parties and have not yet been settled, thus they appear on the balance sheet as obligations that the company is required to fulfill in the future.