The $500,000 and $1 million prizes of “Who Wants To Be A Millionaire” were originally paid out as lump-sums.
Starting 2002, winners received only $250,000 within 30 days, the rest being paid out as annuities over a course of 10 and 20 years. Thus, the $500,000 winners receive $25,000 each year for the next ten years and the million winners get $37,500 per year for 20 years.
Though inflation was’t accounted for, this payout method may be beneficial in the long run because it would save tax.