<prompt> Human: So I live in the state of Oregon USA and will be starting a new job in July. The income difference between what I currently make and the new job is significant, so my taxes will also adjust with that. So what I am wondering is if it would be wise to not pay taxes with each months paycheck, and instead take my full amount, set aside the tax equivalent from the paycheck in a money market account to make interest and then just cut a check in April for the amount of taxes I owe? Am I failing to understand any kind of tax laws or penalties in doing this? The windfall from a 1 interest money market would be significant enough that I would be willing to make this extra effort if I wouldnt suffer any downside or penalties for not giving Uncle Sam an interest free loan with each paycheck.It almost seems too good to be true, but I want to be buying a house in the not too distant future so Im looking at any additional steps for saving money.  <response>: The US has a pay as you go system not a pay by April 15 and youre all good system. If you owe too much in April then youll owe penalties and interest. 