Has no one heard of a roth IRA? I started one when I was 17 with $5000 and put 100$ every month thus far. By the time I retire (65yo) I will have over ~$800,000. Now assume I increase it to the max annual contribution of $5,000 a year once I graduate d-school (I will be 24). my $5,000 has grown to $23,000 in 7 years with only spending $8,400 (a $9,600 increase). Now because it is compounding interest, you cannot just recalculate the roth IRA at this amount. But that calculation is too difficult for me (my wife could probably do it-she is an financial analyst), I will just start the calculation at $23,000 starting at age 24. (remember it will be about 1/6x the amount bc of the compounding interest of that 7 years), my retirement will be: ~$3,000,000! will investing ~$204,000
So most people havent started saving at age 17 so we will asssume you can start now.
Age 22, retire at 65. Seed of $5,000, add $2500 a year(half of max contribution): ~$1,000,000 when you retire while investing only $107,000
Compare this to starting at 32, $5,000 seed, age 65 retire: ~$450,000 while investing ~$82,000.
This wont include any 401k, stocks, house, and dental practice you have. If you are making over $100,000 and live middle class, you can easily have >$5 million at retirement. The key is to start early! You dont need to make a million a year to be a millionaire.
Resources:
http://www.dinkytown.net/java/RothIRA.html
Read: Millionaire Next Door to get an idea how to become rich without saving every dime.