Question

Todd and Jessalyn are 25, newly married, and ready to embark on the journey of life.   They both plan to retire 45 years from today. Because their budget seems tight right now, they had been thinking that they would wait at least 10 years and then start investing $2400 per year to prepare for retirement. Jessalyn just told Todd, though, that she had heard that they would actually have more money the day they retire if they put $2400 per year away for the next 10 years - and then simply let that money sit for the next 35 years without any additional payments - than they would have if they waited 10 years to start investing for retirement and then made yearly payments for 35 years (as they originally planned to do).  

Please help Todd and Jessalyn make an informed decision:   

Assume that all payments are made at the end of a year, and that the rate of return on all yearly investments will be 7.2% annually.

1. How much money will Todd and Jessalyn have in 45 years if they do nothing for the next 10 years, then puts $2400 per year away for the remaining 35 years?

2. How much money will Todd and Jessalyn have in 10 years if they put $2400 per year away for the next 10 years?

b2) How much will the amount you just computed grow to if it remains invested for the remaining 35 years, but without any additional yearly deposits being made?

3. How much money will Todd and Jessalyn have in 45 years if they put $2400 per year away for each of the next 45 years?

4. How much money will Todd and Jessalyn have in 45 years if they put away $200 per MONTH at the end of each month for the next 45 years? (Remember to adjust the 9% annual rate to a Rate per month!) (Round this rate per month to 5 places past the decimal)

5. If Todd and Jessalyn wait 25 years (after the kids are raised!) before they put anything away for retirement, how much will they have to put away at the end of each year for 20 years in order to have $8,000,000 saved up on the first day of their retirement 45 years from today?

Answer 1

Answer a:

Year deposit at the end of year = $2,400

Interest rate = 7.2%

Number of years = 35

To get future value, we will use FV function of excel:

= FV (rate, nper, pmt , pv, type)

= FV (7.2%, 35, -2400, 0, 0)

= $346,590.23

Money will Todd and Jessalyn have in 45 years = $346,590.23

Answer (b):

Time period = 10 years

= FV (7.2%, 10, -2400, 0, 0)

= 33474.37872

= $33,474.38

Money will Todd and Jessalyn have in 10 years = $33,474.38

Answer (b2):

If the money remains invested for the remaining 35 years:

= FV (7.2%, 35, 0, -33474.37872, 0)

= 381531.15985

= $381,531.16

Amount at the of 45 years from now, if it remains invested for the remaining 35 years = $381,531.16

Answer (c):

Time period =45 years, each year amount deposited = $2,400

= FV (7.2%, 45, -2400, 0, 0)

= 728121.3923

= $728,121.39

Money Todd and Jessalyn will have in 45 years = $728,121.39

Answer (d)

Annual rate = 7.2%

Monthly rate (with monthly compounding)= (1 + 7.2%) ^1/12 - 1 = 0.58107%

Time period = 45 *12 = 540

= FV (0.58107%, 540, -200, 0, 0)

= $751,860.88

Amount of money Todd and Jessalyn have in 45 years if they put away $200 per month = $751,860.88

Answer (e):

FV = $8,000,000

Time period = 20 years

We will use PMT function to get annual savings/deposit required:

PMT (rate, nper, pv, fv, type)

= PMT (7.2%, 20, 0, -8000000, 0)

= 190921.715451

= $190,921.72

Money they will have to put away at the end of each year for 20 years = $190,921.72