1. If the first deposit is at 36 years and the last expected deposit is at 65 years, then annual deposits will be made for 30 years. Expected annual withdrawals are $90,000 for 15 years from the retirement fund with a bank that offers compound interest of 8% annually.
Calculation
Present value (PV) =?
Future value (FV) = (90,000*15) = $1,350,000
Periodic payment amount (PMT) =?
Interest rate per period (Rate) = 8% or 0.08
Number of payment periods (Nper) = 30
Using the Excel function “PV”, the following data is entered into the presented fields
Rate = 8%
Nper = 30
PMT =?
Fv = 1,350,000
Type = blank
PMT = $9,416.15
$9,416.15 is the amount required for 30 annual deposits with an 8% compound interest to yield $90,000 for 15 years.
2. If a lump sum amount is deposited on my 35th birthday, then the principle will be compounded for 31 years.
Calculation
Using the compound interest formula
A = P (1+r/n) nt
Where; A = final amount, P = principal, r = interest rate n = number of times the interest is compounded per year and t = number of years
P= A/ (1+r/n) nt P = 1,350,000/ (1+0.08/1)31 P =1,350,000/ (1.08)31 P =1,350,000/ 10.868
The amount required for a lump sum deposit is $124,217.89
3. If an additional $1,500 from my employer bonus plan is deposited annually to the retirement account and a $25,000 is added to the account after 19 years (on my 55th birthday), then; using the total annual contribution obtained in (1),
The first deductions from my annual contribution will be $1,500 from the bonus plan
4,471.98 – 1,500 = 2,971.98
Distributing the $25,000 over the 30 year period, (25,000/30) = 833.33
2,971.98 – 833.33 = 2,138.65
To make $90,000 withdrawals for 15 years, I will need to make annual deposits of $2,138.65
QUESTION 2:
1.
a) Net Present Value
Using the MS-Excel function of NPV the rate of return (12%) is keyed into the “Rate” field and the returns