MegaMillions Mega Millions Taxes by State The Mega Millions jackpot is always growing and causing quite a stir. Use the calculator below to estimate your after-tax payout by state—then weigh lump sum vs annuity for your situation.   Mega Millions Tax Calculator Where was the lottery ticket purchased? — Select a State —Arizona (4.5%)Arkansas (5.5%)California … Continue reading Mega Millions Tax Calculator by State – Cash vs Annuity