Joe's starting salary as a mechanical engineer is around $90,000. Joe is planning to place a... Question: Joe's starting salary as a mechanical engineer is around$90,000. Joe is planning to place a total of 10% of his salary each year in the mutual fund. Joe expects a 5% salary increase each year for the next 30 years of employment.

If the mutual fund will average 8% annual rate of return over the course of his career, what can Joe expect at retirement?

Future Value of Growing Annuity:

Annuity is a series of periodic payment of equal amount and equal interval. Therefore, a growing annuity is a series of periodic payment with an increasing payments but still at equal interval. The future value is the value of money at the end of the term.

{eq}\displaystyle \text{Future value of annuity (FVGA) } = C * \frac{(1 + r)^{t} - (1 + g)^{t}}{r - g} {/eq}

At retirement, Joe can receive \$2,703,428.86

{eq}\displaystyle \text{Future value of annuity (FVGA) } = C * \frac{(1 + r)^{t} - (1 + g)^{t}}{r - g} {/eq}

This is where:

• C is the required payments
• r is the interest rate
• t is the period
• g is the growth

{eq}\displaystyle \text{Future value of annuity (FVGA) } = 9,000 * \frac{(1 + .08)^{30} - (1 + .05)^{30}}{.08 - .05} = 2,703,428.86 {/eq} 