Deferral contributions to a 401(k) are the portions of an employee's salary they elect to postpone receiving until later. Income taxes on these funds, as well as any employer-matching contributions and investment earnings, are deferred until withdrawn later on, typically in retirement.
A safe harbor 401(k) plan defines compensation as Form W-2 wages (that is, the amount shown in an employee's W-2, Box 1, Wages, tips, other compensation), less reimbursements, fringe benefits, moving expenses, and welfare benefits.
Yes, you can have both a deferred compensation plan and a 401(k) plan.
Rolling funds into DCP DCP can accept rolled funds from previous employers held in eligible retirement plans such as 457(b), 401(k), 403(b) and traditional, pretax IRA accounts. The IRS prohibits rolling Roth IRAs into DCP. DCP is the only DRS administered plan that accepts rollovers from other plans.