The problem with assuming a particular annual rate of return is that the market doesn't work that way if you are invested in the stock market. The market is up 0-20% some years and down 0-20% in other years. And, once in a while it is down or up much more that that. So you risk is sequence of returns. If in your first year retired, your investments are down 10%, your 5% withdrawal rate the second year, if you need to access the money, is not 5% of say $800k, it is 5% of $720K - get the rare two down years in a row down, or a 20-30% down year, and you can see what happens to your nest egg. And no one knows what the investment returns will be your first couple of years. I believe that is why some responses believe you need more cushion that you currently have. Ultimately, the question is how much, and what kind of, risk you are comfortable with.