The amount the jackpots will increase by between drawings for both Mega Millions and Powerball, will be established based on each game's sales and interest rates, with no set fixed minimum amounts. Previously each game had a starting jackpot amount of $40 million. Once the current jackpot grand prizes have been won, the new starting jackpot amounts will be determined and announced prior to each Mega Millions and Powerball drawings. Due to that nationwide changes have been made to the Mega Millions and Powerball starting jackpot amounts and minimum jackpot roll increases. NEW YORK (WABC) - It turns out, not as many people are buying lottery tickets due to the coronavirus.