It also depend on when you plan to retire as well. That makes a big difference. I’m planning to retire in Del Mar/Solana Beach area as well. I think that when I get to $2M cash, I would have enough to retire. With $2M, if I get 5% return on my money, that would mean yearly income of $100k. That would be more than enough for me to live on. Without car or house payment, $100k is way more than enough to retire on for me. You can look at your current expenses and remove housing & car and see how much you’re really spending. That will give you a good idea of how much you need to retire.