When the Powerball jackpot is won, the next jackpot is guaranteed to be $40 million (annuity). If a jackpot is not won, the minimum rollover is $10 million. The cash in the jackpot pool is guaranteed to be the current value of the annuity. If revenue from ticket sales falls below expectations, game members must contribute additional funds to the jackpot pool to cover the shortage; the most likely scenario where this can occur is if the jackpot is won in consecutive drawings.
Winning the jackpot requires matching all five numbers, plus the Powerball. Players who match five numbers win $1 million; players who match four numbers plus the Powerball win $50,000; players who match four numbers win $100; players who match three numbers plus the Powerball win $100; players who match three numbers win $7; players who match two numbers plus the Powerball win $7; players who match one number plus the Powerball win $4; and players who match only the Powerball win $4.
Note: As indicated in the instructions, for the purposes of eligibility some countries include components and dependent areas overseas.  If you are a native of a dependency or overseas territory, please select the appropriate country of eligibility.  For example, natives of Macau S.A.R should select Portugal, and natives of Martinique should select France.
The largest Mega Millions jackpot, advertised as $640 million at the time of the drawing (annuitized) or $462 million (cash value), was drawn on March 30, 2012. The initial estimate for that drawing (following the March 27 drawing, which was $363 million annuity) was $476 million (later increased to $500 million and again to $540 million); brisk ticket sales pushed the jackpot values, both annuitized (to $656 million) and the cash option ($474 million) higher. The amount spent on Mega Millions for drawings following its previous jackpot win, on January 24, 2012, was at least $1.5 billion.[13] three jackpot-winning tickets had been confirmed (Illinois, Kansas, and Maryland).[14]
*a tip to know whether the website you are looking at actually buys lottery tickets online or follows the insurance model is to check the wording that they use. If you see the words “Play” then you can be confident it is a company that has agents and buys your tickets physically, if you see the words “Bet” you can be sure it is following the insurance model and you are placing a bet on the outcome of a lottery.
On March 13, 2010, New Jersey became the first Mega Millions participant (just before the cross-sell expansion) to produce a jackpot-winning ticket for Powerball after joining that game. The ticket was worth over $211 million annuity (the cash option was chosen). On May 28, 2010, North Carolina became the first Powerball member (just before the cross-selling expansion) to produce a jackpot-winning Mega Millions ticket after joining Mega Millions, with an annuity jackpot of $12 million.
The structure of the draw is one which regular lottery players will be very familiar with; players must pick 5 regular numbers from a pool with a total of 69 numbers and in addition to these regular number picks, you also choose one bonus ball (known as the Powerball) from a pool of 26. These two pools of numbers are mutually exclusive and remain completely separate throughout the drawing procedure. In order to jackpot the US Powerball, you need to match all 5 regular numbers and the Powerball. Do this and you are instant Powerball millionaire – it’s as simple as that!