TSP or Thrift Savings Plan is a retirement plan fulfilling the requirements to be a member of the uniformed services in the US or federal officers. It is operating to be a plan giving the occupation offering types of the same tax benefits. If you join TSP, you can select to transfer or rollover to a Roth IRA. TSP Rollover to Roth IRA is managing your transaction on the type of TSP account to be transferring source and used method to move money.