Regular vs Supplemental Wages: How to Classify Bonuses, PTO, and Fringe Benefits

Have you ever stared at a new payroll earning code and wondered exactly which wage type to assign? Setting up payroll earning codes for bonuses, paid time off (PTO), reimbursements, and other payments sounds like a simple configuration choice. However, the wage type you assign directly impacts how payroll taxes are calculated, whether earnings count toward overtime, and how wages appear on tax forms.

If you set the wage type incorrectly, your payroll runs can produce incorrect withholding, reporting errors, or costly compliance issues.

That is why choosing the correct wage type for each earning code is a critical part of your payroll setup. Let us walk through how you can choose the right wage type for common earning scenarios to keep your payroll accurate and compliant all year long.

Not all employee earnings are treated the same way for tax and payroll purposes. The IRS has strict guidelines on how different payments should be taxed and reported.

Each category follows different tax withholding rules and reporting requirements. For example, supplemental wages like bonuses and commissions are often withheld at a flat supplemental rate rather than using standard payroll tax calculations.

For federal income tax withholding, supplemental wages may be taxed using one of two IRS-approved methods:

• Percentage method: A flat withholding rate (currently 22% for most supplemental wages).
• Aggregate method: Supplemental wages are combined with regular wages and taxed using standard withholding tables.

Choosing the correct wage classification ensures payroll systems calculate withholding and reporting correctly.

Understanding how different earnings are generally classified can help payroll teams configure earning codes correctly and avoid tax withholding or reporting issues. The IRS distinguishes between several types of wages depending on how and when the payments are made.

The sections below explain how common earning categories are typically treated for payroll and tax purposes.

Note: Refer to Publication 15 (2026), (Circular E), Employer’s Tax Guide for detailed guidance.

Classifying earnings correctly is an important part of payroll setup, especially when different wage types affect tax withholding, reporting, and payroll calculations. Greenshades simplifies this process by allowing payroll teams to define and manage earning codes directly within payroll settings.

When creating or updating an earning code in Greenshades, administrators can assign the appropriate wage type classification, which determines how the system:

• Calculates federal and payroll tax withholding
• Applies payroll calculations such as overtime and wage adjustments
• Reports earnings for tax forms and compliance purposes

Because these rules are configured at the earning code level, Greenshades automatically applies the correct treatment during payroll processing. This helps ensure that payments such as bonuses, PTO payouts, reimbursements, and fringe benefits are handled consistently and in alignment with payroll tax requirements.

To create a new earning code:

Navigate to
Settings → Payroll → Codes → Create Code

From there, administrators can create a new earning code and select the wage type that best reflects how the earnings should be treated for payroll and tax purposes.

By centralizing earning code configuration, Greenshades helps payroll teams maintain consistent wage classification, reduce manual corrections, and ensure payroll runs smoothly across a wide range of compensation scenarios.

The wage type you choose directly impacts tax rates, benefit calculations, and compliance reporting. By aligning each earning code with the appropriate wage type, you will avoid costly errors, prevent tax filing headaches, and ensure your payroll runs exactly as expected.

Do you have questions about special earnings, complex fringe benefits, or unique payroll scenarios? Reach out to the Greenshades team for support. We are always here to help you navigate your most complex payroll challenges.

What is the difference between regular wages and supplemental wages?

Regular wages are payments made for routine work performed during a pay period, such as hourly pay, salaries, and overtime wages. These wages are taxed using standard federal income tax withholding tables.

Supplemental wages are payments made in addition to an employee’s regular earnings. Examples include bonuses, commissions, PTO payouts, severance pay, and certain taxable fringe benefits. Supplemental wages may be taxed using either a flat IRS withholding rate or the aggregate method.

Are bonuses considered supplemental wages?

Yes. Bonuses are generally classified as supplemental wages under IRS rules. Because bonuses are paid in addition to an employee’s normal earnings, payroll systems often treat them as supplemental income for tax withholding purposes.

Are PTO payouts treated as supplemental wages?

PTO payouts are often treated as supplemental wages, particularly when they are paid separately from an employee’s regular paycheck. Examples include unused vacation payouts at termination or PTO buyback programs.

In some cases, employers may combine PTO payouts with regular wages and apply standard withholding using the aggregate method.

How does the IRS tax supplemental wages?

The IRS allows two main methods for withholding federal income tax on supplemental wages:

Percentage method: A flat withholding rate of 22% for most supplemental wages.

Aggregate method: Supplemental wages are combined with regular wages for the pay period and taxed using standard withholding tables.

Special IRS rules may apply when supplemental wages exceed certain thresholds.