Roth TSP implementation date is May 7, 2012 — Agencies and services can begin accepting elections for Roth (after-tax) contributions at that time. The Roth TSP feature will give participants greater flexibility in the tax treatment of their accounts. Roth contributions are tax-free when withdrawn; their earnings are also tax-free when withdrawn (as long as certain IRS requirements are met). Participants should check with their agencies or services to find out when they will be ready to participate in Roth TSP. See the press release for more information.