HR Daily Advisor Publishes Article by Seong Kim and Takai Gillam on Withdrawal Liability Calculations

HR Daily Advisor featured an article by Seyfarth attorneys Seong Kim and Takai Gillam, “Supreme Court to Decide Timing of Actuarial Assumptions in Withdrawal Liability Calculations.” The article, published on March 20, 2026, examines a closely watched US Supreme Court case that could reshape how multiemployer pension plans calculate withdrawal liability under ERISA.

The authors analyze the legal and practical implications of the Court’s review of Trustees of the IAM National Pension Fund v. M&K Employee Solutions, LLC, focusing on whether pension plans may adopt actuarial assumptions after the end of the plan year in which an employer withdraws. The article also explores how differing circuit court approaches have created uncertainty for employers, plans, and actuaries nationwide—and what potential outcomes may mean for governance practices and financial exposure.

As Kim and Gillam explain:

“Actuarial assumptions, particularly interest rates, can dramatically alter withdrawal liability amounts, often by millions of dollars.”

The full article is available here.