Offer your thoughts or opinion on the input financial query or topic using your financial background.

What percent of my salary should I save?
What percent of my salary should I save? is tightly coupled with its companion, What size “nest egg” should my husband and I have, and by what age? Interestingly, Mr.Christer's answer, 10%, is the number that plugs into the equation that I reference. Jay's 25X rule is part of this. We start with the assumption that one's required income at retirement will be 80% of their pre-retirement income. That's high by some observations, low by others. A quick look at the expenses that go away in retirement - The above can total 35-40% It would be great if it ended there, but there are costs that go up. The above extra spending is tough to nail down, after all, you knew what you spent, and what's going away, but the new items? Crapshoot. (For non-native speakers - this refers to a game with dice, meaning a random event) Again, referencing Mr Christer's answer "financial planners whom you could pay to give you a very accurate number," I'm going to disagree with that soundbyte. Consider, when retirement is 30 years away, you don't know much If I can offer an analogy. I once had the pleasure of hearing Jim Lovell (The astronaut played by Tom Hanks in Apollo 13) give a speech. He said that for the first 99% of the trip to the moon, they simply aimed ahead of their target, never directly at the moon. In this manner, I suggest that with so many variables, accuracy is impossible, it's a moving target. Start young, take the 10% MrC offered, and keep saving. Every few years, stop and see if you are on target, if not, bump the number a bit.  Better to turn 50 and find that after a good decade you've reached your number and can drop your savings to a minimum, perhaps just to capture a 401(k) match, than to turn 50 and realize you've undersaved and need to bump to an unsustainable level. Imagine planning ahead in 1999. You've seen 2 great decades of returns, and even realizing that 18%/yr couldn't continue, you plan for a below average 7%, this would double your 1999 balance in 10 years. Instead you saw zero return. For a decade. In sum, when each variable has an accuracy of +/-50% you are not going to combine them all and get a number with even 10% accuracy (as if MrC were wrong, but the pro would tell you 11% is right for you?). This is as absurd as packaging up a bunch of C rated debt, and thinking that enough of this paper would yield a final product that was AAA.