this is one of the few times the IRS plays the game 'heads we win, tail you lose" the other way around!
Since both stimulus payments are estimates against your 2020 tax return, Congress wrote into the CARES act and the law that Trump signed the other night, that if the IRS sent you too much based on the results of your 2020 tax return, you were not required to send the money back!
The 2nd stimulus will also be sent out based on your 2019 tax return, so again if that is too much compared to your 2020 actual tax return, you get to keep the money.
note that the $150,000 only limited you to the $2400 and then the limit decreased by $5 for each $100 you are above $150,000. Mathematically, it doesn't go to zero until $198,000 (First stimulus) and $174,000 (2nd Stimulus).
