I was going to reply with my own opinion to frugal, but your answer is basically what I would have said. Buying things in bulk or at a deeply discounted price is the same as putting money in a savings account, only better. If a savings account only pays 2% , that is only 2 cents on a dollar. The item you may have just found on sale could be a savings of 50 cents. If you bought four of them, that adds up to $2.00. The difference in the spread between 2 cents and $2.00 is tremendous. So, in terms of actual saving for your deposit, the next time you open a new tube of that bargain toothpaste, go put the actual cash value of that tube in a jar and just see how quickly it adds up. I can guarantee your jar will be more valuable than any piddly interest your bank will pay you.