http://www.retirement-calculator.info

How Much Do I Need To Retire? - How to Calculate II

     Similar to the calculation on the main page, in this calculation, you can change some fo the assumptions such as inflation and investment return required.

     First, answer the following questions.

Input 
How much money do you have today?  (1) ________
How many years do you have until you retire?  (2) ________
In today's dollars, how much income do you need per year when you retire?  (3) ________

How much passive income per year will you have during retirement?

  • For example, from Social Security benefits, Pension, rents
  • NOT including income from investments such as dividends
 (4) ________

     Then, write down the assumptions you are comfortable with using the table below.

Assumptions
What is the rate of inflation you want to assume?  (a) ______%
What average return on investments are you comfortable with?  (b) ______%

The rate of return which will be used in this calculation will be:

Your comfort level rate of return (b)- inflation (a)

 (c) ______%

 

     Finally, you can use the answers you have input above (which will be referred to as (1), (2), (3), and (4)) to calculate what you will need for retirement using the following guideline.

  Calculate    

Income needed during retirement (adjusted for inflation of (a)%)

 

(3)x(1+a%)^(2)

(5) _______

Additional income needed during retirement 

 

(5) - (4) 

(6)  _______

Principal investment needed to achieve income level needed (3) assuming rate of return of a%

 (6) / c%

(7) _______

Short Fall 

 (7) - (1)

(8) _______
Additional Principal Needed NOW

 (8) / {(1+b%)^(2)}

(9) _______