The Basics of Supplemental Pay Taxation

Vicki M. Lambert

Monday,
September 29,2025
Time:
1:00 PM EST
Duration:
100 Minutes
Event Type :
Recorded Webinar
Overview :

Navigating the rules around supplemental pay taxation can be complex and costly if not handled properly. Since the implementation of the Tax Cuts and Jobs Act of 2017, while the supplemental rate has changed, the IRS requirements for withholding on supplemental wages remain the same. Payroll professionals must continue to manage these responsibilities carefully, as mistakes in this area—such as incorrect tax withholding—can lead to significant penalties, and in extreme cases, even wage theft claims. This webinar provides a comprehensive overview of how to properly handle and tax various forms of supplemental pay, including bonuses, severance pay, and fringe benefits.

Attendees will walk away with a solid understanding of the IRS rules and expectations regarding supplemental wages. The session will offer practical instruction on differentiating between regular and supplemental wage payments, calculating withholding amounts, and applying the appropriate tax rate. Real-world examples will be used to illustrate common and uncommon scenarios, ensuring attendees gain both foundational knowledge and actionable strategies to stay compliant.

Areas Covered in the Session:-

  • Definitions and examples of supplemental pay
  • Step-by-step tax calculation methods for supplemental wages
  • Election options, decision-makers, and timing considerations
  • Recordkeeping requirements under mandatory flat rate rules.

Why Should You Attend?

  • Distinguish between supplemental and regular wage payments with confidence
  • Apply IRS-approved withholding methods accurately based on pay type and frequency
  • Understand when to use the flat rate versus aggregate method and how Form W-4 impacts decisions
  • Analyze case studies and real-world examples to apply rules correctly in varied situations
  • Meet recordkeeping and compliance requirements with clarity and precision

This session offers practical guidance to help you avoid costly payroll errors, improve compliance, and gain confidence in handling supplemental pay taxation. Whether you're new to payroll or need a refresher, this training ensures you're equipped to apply IRS rules accurately and efficiently.

Who will Benefit?

  • Payroll Executives, Managers, Administrators, and Entry-Level Personnel
  • Human Resources Professionals
  • Accounting and Finance Staff
  • Business Owners and Departmental Managers
  • Legal Professionals and Lawmakers
  • Anyone responsible for payroll compliance and taxation issues.

Recorded Version

Combo Version

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Instructor:

Vicki M. Lambert, CPP is President and Academic Director of The Payroll Advisor™ a firm specializing in the training of payroll professionals. With over three decades of hands-on experience in all facets of payroll functions as well as over 20 years as a trainer and author, Ms. Lambert is a sought-after and respected voice in the practice and management of payroll issues. She has conducted open market training seminars on payroll issues across the United States as well as served as an in-house trainer for businesses such as Sun Micro Systems, Fox Studios, Disney, the County of Riverside, and the City of Hesperia. Ms. Lambert currently produces and presents payroll-related audio seminars, webinars, and webcasts for clients, APA chapters, and business groups throughout the country. Ms. Lambert is an adjunct faculty member at Brandman University in Southern California and is the creator of and instructor for their Practical Payroll Online program, which is approved for re-certification hours by the APA.