66 1/2, soon it will be 67. However, i fully expect Congress to change that upwards. The vast majority of people take it at 62, that number needs to be minimum 65 with penalties and max at 75. Lifespands are about 82-83, but with new biomedince breakthroughs, that could easily jump to 90+. My mother just passed away at 99. She was lucky enough to have three different income streams in her old age, but all three of them were based upon 1960 projections, as a result she basically had little to no income.

Oh and expect medical costs to be extreme. If you are younger, please max out your HSAs and never touch them. New medicines are great, but they are extremely expensive. $1000/mo is not huge