Question: what is the difference between iu and tdiu?
Answer: "IU" is just a shortened version of "TDIU". If you are granted "TDIU" or "IU"(same thing)...it does NOT mean that you will be "P&T". "P&T" has additional Benefits for the Veteran's Dependants. The Veteran will be Eligible for Dental Benefits...with or without the additional rating of "P&T".