If you begin investing at age 45 instead of age 40, how much more do you need to invest per month to have $1M at retirement? Why is this amount so much greater than the difference between 20 and 25?

HOW MUCH YOU NEED TO SAVE PER MONTH TO HAVE 1 MILLION AT RETIREMENT (6% RETURN RATE) MONTHLY SAVINGS TO GET TO $1M $16000 $14000 $12000 $10000 $8000 $6000 $4000 $2000 ATES OF AMERICA $360 $500 $700 $990 20 25 $1435 $2153 $3421 30 35 40 45 50 AGE WHEN YOU BEGIN SAVING $6071 55 $14,261 WALLS 60