<prompt> Human: Suppose I had the habit of spending whatever part of the paycheck made it into my checking account; not going into debt but not saving beyond my 401k. What are the downsides of adding to my W4 withholding and then moving my entire refund into savings only once per year. Obviously there is the loss of a year of interest, but even if I was saving 10,000 a year this way, that would significantly less than a thousand dollars lost. If I found this psychologically easier, could I do it?  <response>: If you find it works for you, go for it. Despite the fact that many people will lose their minds telling you that you are giving an interest free loan to the government, the interest loss is going to be minimal compared to the added savings. 