The IRA life expectancy table was first available in 2002, says Ed Slott and Company, LLC. From 1987 until 2000 there were numerous proposals, which led to numerous discussions on IRA distributions. 2001 saw approval of the final proposal, leading to final regulations of life expectancy tables in 2002
When a person reaches the age of 70 1/2, she must begin taking withdrawals from her IRA, notes the Internal Revenue Service. The IRA life expectancy table helps determine when someone must begin taking the required minimum distribution from an account.
There are three separate life expectancy tables discussed in the Internal Revenue Service's Publication 590b. These include the single life expectancy table, the joint and last survivor expectancy table, and the uniform lifetime table.