Is there a requirement for 401k catchup annual limit amounts ( $6000 for 2017 tax year) to be separately identified from an employees regular 401k annual limit amt of $18,000 for 2017 tax year for payroll deduction purposes? The IRS makes a statement that the $18,000 limit has to be reached before 401k catchup contributions begin; however, does that imply that the catchup amounts have to be reported separately to third party 401k administrators or the IRS? I don't see any requirements for W2 purposes in breaking out the catchup amounts for 2017 tax year. I am not sure if the Form 5500 requires catchup contributions separated?
Any advice here would be appreciated as to whether catchup has to be separated for reporting purposes.
Thank you,
Linda A.