An employee enrolled in the Supplemental Retirement Plan (SRP) is required to make contributions to the Plan through payroll deduction. If you are eligible for a deferred compensation match or conversion, the questions and answers below will help you make your selection.TRA is a defined-benefit (DB) pension plan. During your career, you and your employer make mandatory payroll contributions to TRA. Earned in other covered Minnesota public pension plans and collect a benefit from each plan. If I move out of Minnesota, what will happen to my account? The IRS sets annual contribution limits for 401(k) plans. The Internal Revenue Code limits contributions to a 403(b) or 457(b) tax-deferred retirement plan.