"How will the payroll system calculate the FICA wage threshold of $145,000 for purposes of identifying employees subject to the new Roth catch-up mandate? ... Does the 401(k) plan provide for a 'spillover' catch-up election? Or does the plan require participants to make a separate catch-up election? ... Will the employer [1] implement a deemed Roth catch-up election, or [2] cancel existing elections and require that participants subject to the Roth catch-up mandate make a new Roth catch-up contribution election? ... Communications will be needed to educate employees ... Amendments are generally required by December 31, 2026, but it may be advisable to record the design decisions as they are made."  MORE >>