you want to establish a savings fund from which you will purchase some land to build a 2nd home in the mountains. you want to make this purchase in 20 years. You estimate the land will cost you 80,000. assuming you will earn 8% on account, how much per month do you need to free up from your budget to reach your goal?
Here, the deposits will be same every month, so it is an annuity. The future value of annuity is $80000. Here we will use the future value of annuity formula as per below:
FVA = P * ((1 + r)n - 1 / r)
where, FVA is future value of annuity = $80000, P is the periodical amount, r is the rate of interest = 8%. Monthly rate = 8% / 12 = 0.6667% and n is the time period = 20 * 12 = 240
Now, putting these values in the above formula, we get,
$80000 = P * ((1 + 0.6667%)240 - 1 / 0.66667%)
$80000 = P * ((1 + 0.006667)240 - 1 / 0.006667)
$80000 = P * ((1.006667)240 - 1 / 0.006667)
$80000 = P * ((4.92680277081 - 1 / 0.006667)
$80000 = P * (3.92680277081 / 0.006667)
$80000 = P * 588.990966
P = $80000 / 588.990966
P = $135.83
So, the amount of money that we need to deposit each month is $135.83.
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