Question

In: Finance

I’m investing 6% of my monthly salary into a savings account with a monthly interest rate...

I’m investing 6% of my monthly salary into a savings account with a monthly interest rate of 0.67%, the interest compounds monthly. How much will the savings account be worth after 10 years if I make an annual salary of $62,000 dollars and expect an annual salary increase of 1.5%?

Solutions

Expert Solution

Monthly interest rate = 0.67%

Number of times compounding in a year = 12 (monthly basis)

Monthly compounded Annual interest rate = (1+ monthly interest rate)^(number of time compounding in a year) -1

= (1+0.67%)^12 -1

= 1.08343 -1

Effective annual interest rate   = 8.343%

Current salary = $62,000 (1.5% increment every year)

Savings every year = 6% of the salary in that year

Total savings at the end of 10th year = $62,899

Spreadsheet calculation:

Years Annual salary
(1.5% increase pa)
Savings (6% of salary) Annual effective interest rate Cumulative saving
amount at the of year
1 62,000 3,720 8.343% 4,030
2 62,930 3,776 8.343% 8,457
3 63,874 3,832 8.343% 13,315
4 64,832 3,890 8.343% 18,641
5 65,805 3,948 8.343% 24,473
6 66,792 4,007 8.343% 30,857
7 67,793 4,068 8.343% 37,838
8 68,810 4,129 8.343% 45,468
9 69,843 4,191 8.343% 53,802
10 70,890 4,253 8.343% 62,899

Excel formulas:


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