Which of the following is an example of an after-tax benefit?

The correct answer is the option related to on-site health facilities, as this represents an after-tax benefit. After-tax benefits are those perks or advantages that employees receive which do not impact their taxable income directly. While traditional forms of compensation, such as salary or bonuses, typically have taxes deducted before the employee receives them, benefits such as access to on-site health facilities are provided with no immediate tax implications for the employee.

When employees utilize on-site health facilities, they are not taxed on this benefit each time they use it. Instead, it is considered a non-cash benefit that improves overall employee welfare, potentially leading to savings on medical expenses in the long term without increasing their taxable income.

In contrast, a company car, bonus payments, or salary are considered taxable forms of compensation. These options directly increase an employee's gross income, leading to a tax obligation. The presence of these forms of compensation means that employees will see a portion of their earnings withheld for taxes, making them less favorable in terms of after-tax benefits when compared to on-site health facilities. Thus, on-site health facilities most accurately depict the nature of an after-tax benefit in this context.