At an interest rate of 6 how much will need to be invested today to have $10,000 in 5 years

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Congratulations!!! You have won a cash prize! You have two payment options:

• A: Receive $10,000 now

or

• B: Receive $10,000 in three years. Which option would you choose?

The answer depends on your understanding of the time value of money (TMV).

Key Takeaways

• The time value of money is a financial principle that states the value of a dollar today is worth more than the value of a dollar in the future.
• This philosophy holds true because money today can be invested and potentially grow into a larger amount in the future.
• The present value of a future cash flow is calculated by dividing the future cash flow by a discount factor that incorporates the amount of time that will pass and expected interest rates.
• The future value of a sum of money today is calculated by multiplying the amount of cash by a function of the expected rate of return over the expected time period.
• The time value of money is used to make strategic, long-term financial decisions such as whether to invest in a project or which cash flow sequence is most favorable.

What Is the Time Value of Money?

If you're like most people, you would choose to receive the $10,000 now. After all, three years is a long time to wait. Why would any rational person defer payment into the future when they could have the same amount of money now? For most of us, taking the money in the present is just plain instinctive. So at the most basic level, the time value of money demonstrates that all things being equal, it seems better to have money now rather than later.

But why is this? A $100 bill has the same value as a $100 bill one year from now, doesn't it? Actually, although the bill is the same, you can do much more with the money if you have it now because over time you can earn more interest on your money.

Back to our example: By receiving $10,000 today, you are poised to increase the future value of your money by investing and gaining interest over a period of time. For Option B, you don't have time on your side, and the payment received in three years would be your future value. To illustrate, we have provided a timeline:

If you are choosing Option A, your future value will be $10,000 plus any interest acquired over the three years. The future value for Option B, on the other hand, would only be $10,000. So how can you calculate exactly how much more Option A is worth, compared to Option B? Let's take a look.

Time value of money often ignores detrimental impacts to finance such as negative interest rates or capital losses. In situations where losses are known and unavoidable, negative growth rates can be used.

Future Value Basics

If you choose Option A and invest the total amount at a simple annual rate of 4.5%, the future value of your investment at the end of the first year is $10,450. We arrive at this sum by multiplying the principal amount of $10,000 by the interest rate of 4.5% and then adding the interest gained to the principal amount:

$ 1 0 , 0 0 0 × 0 . 0 4 5 = $ 4 5 0 \begin{aligned} &\$10,000 \times 0.045 = \$450 \\ \end{aligned} ​$10,000×0.045=$450​

$ 4 5 0 + $ 1 0 , 0 0 0 = $ 1 0 , 4 5 0 \begin{aligned} &\$450 + \$10,000 = \$10,450 \\ \end{aligned} ​$450+$10,000=$10,450​

You can also calculate the total amount of a one-year investment with a simple manipulation of the above equation:

OE = ( $ 1 0 , 0 0 0 × 0 . 0 4 5 ) + $ 1 0 , 0 0 0 = $ 1 0 , 4 5 0 where: OE = Original equation \begin{aligned} &\text{OE} = ( \$10,000 \times 0.045 ) + \$10,000 = \$10,450 \\ &\textbf{where:} \\ &\text{OE} = \text{Original equation} \\ \end{aligned} ​OE=($10,000×0.045)+$10,000=$10,450where:OE=Original equation​

Manipulation = $ 1 0 , 0 0 0 × [ ( 1 × 0 . 0 4 5 ) + 1 ] = $ 1 0 , 4 5 0 \begin{aligned} &\text{Manipulation} = \$10,000 \times [ ( 1 \times 0.045 ) + 1 ] = \$10,450 \\ \end{aligned} ​Manipulation=$10,000×[(1×0.045)+1]=$10,450​

Final Equation = $ 1 0 , 0 0 0 × ( 0 . 0 4 5 + 1 ) = $ 1 0 , 4 5 0 \begin{aligned} &\text{Final Equation} = \$10,000 \times ( 0.045 + 1 ) = \$10,450 \\ \end{aligned} ​Final Equation=$10,000×(0.045+1)=$10,450​

The manipulated equation above is simply a removal of the like-variable $10,000 (the principal amount) by dividing the entire original equation by $10,000.

If the $10,450 left in your investment account at the end of the first year is left untouched and you invested it at 4.5% for another year, how much would you have? To calculate this, you would take the $10,450 and multiply it again by 1.045 (0.045 +1). At the end of two years, you would have $10,920.25.

Calculating Future Value

The above calculation, then, is equivalent to the following equation:

Future Value = $ 1 0 , 0 0 0 × ( 1 + 0 . 0 4 5 ) × ( 1 + 0 . 0 4 5 ) \begin{aligned} &\text{Future Value} = \$10,000 \times ( 1 + 0.045 ) \times ( 1 + 0.045 ) \\ \end{aligned} ​Future Value=$10,000×(1+0.045)×(1+0.045)​

Think back to math class and the rule of exponents, which states that the multiplication of like terms is equivalent to adding their exponents. In the above equation, the two like terms are (1+ 0.045), and the exponent on each is equal to 1. Therefore, the equation can be represented as the following:

Future Value = $ 1 0 , 0 0 0 × ( 1 + 0 . 0 4 5 ) 2 \begin{aligned} &\text{Future Value} = \$10,000 \times ( 1 + 0.045 )^2 \\ \end{aligned} ​Future Value=$10,000×(1+0.045)2​

We can see that the exponent is equal to the number of years for which the money is earning interest in an investment. So, the equation for calculating the three-year future value of the investment would look like this:

Future Value = $ 1 0 , 0 0 0 × ( 1 + 0 . 0 4 5 ) 3 \begin{aligned} &\text{Future Value} = \$10,000 \times ( 1 + 0.045 )^3 \\ \end{aligned} ​Future Value=$10,000×(1+0.045)3​

However, we don't need to keep on calculating the future value after the first year, then the second year, then the third year, and so on. You can figure it all at once, so to speak. If you know the present amount of money you have in an investment, its rate of return, and how many years you would like to hold that investment, you can calculate the future value (FV) of that amount. It's done with the equation:

FV = PV × ( 1 + i ) n where: FV = Future value PV = Present value (original amount of money) i = Interest rate per period n = Number of periods \begin{aligned} &\text{FV} = \text{PV} \times ( 1 + i )^ n \\ &\textbf{where:} \\ &\text{FV} = \text{Future value} \\ &\text{PV} = \text{Present value (original amount of money)} \\ &i = \text{Interest rate per period} \\ &n = \text{Number of periods} \\ \end{aligned} ​FV=PV×(1+i)nwhere:FV=Future valuePV=Present value (original amount of money)i=Interest rate per periodn=Number of periods​

Present Value Basics

If you received $10,000 today, its present value would, of course, be $10,000 because the present value is what your investment gives you now if you were to spend it today. If you were to receive $10,000 in one year, the present value of the amount would not be $10,000 because you do not have it in your hand now, in the present.

To find the present value of the $10,000 you will receive in the future, you need to pretend that the $10,000 is the total future value of an amount that you invested today. In other words, to find the present value of the future $10,000, we need to find out how much we would have to invest today in order to receive that $10,000 in one year.

To calculate the present value, or the amount that we would have to invest today, you must subtract the (hypothetical) accumulated interest from the $10,000. To achieve this, we can discount the future payment amount ($10,000) by the interest rate for the period. In essence, all you are doing is rearranging the future value equation above so that you may solve for present value (PV). The above future value equation can be rewritten as follows:

PV = FV ( 1 + i ) n \begin{aligned} &\text{PV} = \frac{ \text{FV} }{ ( 1 + i )^ n } \\ \end{aligned} ​PV=(1+i)nFV​​

An alternate equation would be:

PV = FV × ( 1 + i ) − n where: PV = Present value (original amount of money) FV = Future value i = Interest rate per period n = Number of periods \begin{aligned} &\text{PV} = \text{FV} \times ( 1 + i )^{-n} \\ &\textbf{where:} \\ &\text{PV} = \text{Present value (original amount of money)} \\ &\text{FV} = \text{Future value} \\ &i = \text{Interest rate per period} \\ &n = \text{Number of periods} \\ \end{aligned} ​PV=FV×(1+i)−nwhere:PV=Present value (original amount of money)FV=Future valuei=Interest rate per periodn=Number of periods​

Calculating Present Value

Let's walk backward from the $10,000 offered in Option B. Remember, the $10,000 to be received in three years is really the same as the future value of an investment. If we had one year to go before getting the money, we would discount the payment back one year. Using our present value formula (version 2), at the current two-year mark, the present value of the $10,000 to be received in one year would be $10,000 x (1 + .045)-1 = $9569.38.

Note that if today we were at the one-year mark, the above $9,569.38 would be considered the future value of our investment one year from now.

Continuing on, at the end of the first year we would be expecting to receive the payment of $10,000 in two years. At an interest rate of 4.5%, the calculation for the present value of a $10,000 payment expected in two years would be $10,000 x (1 + .045)-2 = $9,157.30.

Of course, because of the rule of exponents, we don't have to calculate the future value of the investment every year counting back from the $10,000 investment in the third year. We could put the equation more concisely and use the $10,000 as FV. So, here is how you can calculate today's present value of the $10,000 expected from a three-year investment earning 4.5%:

$ 8 , 762.97 = $ 10 , 000 × ( 1 + . 045 ) − 3 \begin{aligned} &\$8,762.97 = \$10,000 \times ( 1 + .045 )^{-3} \\ \end{aligned} ​$8,762.97=$10,000×(1+.045)−3​

So the present value of a future payment of $10,000 is worth $8,762.97 today if interest rates are 4.5% per year. In other words, choosing Option B is like taking $8,762.97 now and then investing it for three years. The equations above illustrate that Option A is better not only because it offers you money right now but because it offers you $1,237.03 ($10,000 - $8,762.97) more in cash! Furthermore, if you invest the $10,000 that you receive from Option A, your choice gives you a future value that is $1,411.66 ($11,411.66 - $10,000) greater than the future value of Option B.

If your compounding period is less than a year, remember to divide the expected rate by the appropriate number of periods. For example, imagine a situation that uses 6% annual interest with $100 cash flow every month for one year. For this situation, you would divide the rate by 12 and use 0.50% as the discount rate. This is because the number of periods would be 12, the number of cash flow periods.

Present Value of a Future Payment

Let's up the ante on our offer. What if the future payment is more than the amount you'd receive right away? Say you could receive either $15,000 today or $18,000 in four years. The decision is now more difficult. If you choose to receive $15,000 today and invest the entire amount, you may actually end up with an amount of cash in four years that is less than $18,000.

How to decide? You could find the future value of $15,000, but since we are always living in the present, let's find the present value of $18,000. This time, we'll assume interest rates are currently 4%. Remember that the equation for present value is the following:

PV = FV × ( 1 + i ) − n \begin{aligned} &\text{PV} = \text{FV} \times ( 1 + i )^{-n} \\ \end{aligned} ​PV=FV×(1+i)−n​

In the equation above, all we are doing is discounting the future value of an investment. Using the numbers above, the present value of an $18,000 payment in four years would be calculated as $18,000 x (1 + 0.04)-4 = $15,386.48.

From the above calculation, we now know our choice today is between opting for $15,000 or $15,386.48. Of course, we should choose to postpone payment for four years!

What Is Time Value of Money?

Time value of money is the concept that money today is worth more than money tomorrow. That is because money today can be used, invested, or grown. Therefore, $1 earned today is not the same as $1 earned one year from now because the money earned today can generate interest, unrealized gains, or unrealized losses.

How Do I Calculate Time Value of Money?

The time value of money has several different calculations depending on when the cash flow is being received and which direction you want to value money. The direction depends on whether you want to know the present value (the value today) or the future value (the value at a date in the future).

In addition, there are different formulas depending on the cash flow. You can either calculate the present value or future value of a single lump sum or a series of payments (i.e. $5,000 received every year for the next 5 years).

In general, you calculate the time value of money by assessing a discount factor of future value factor to a set of cash flows. The factor is determined by the number of periods the cash flow will impacted as well as the expected rate of interest for the period.

What Is the Difference Between Present Value and Future Value?

Present value is the time value of money for a series of cash flow that calculates the value of the money today. For example, if you want to find the value of $1,000 to be received one year from now or the value of $2,500 to be received each month for the next two years, you are trying to find the present value.

Alternatively, future value is time value of money concept of finding the value of a series of cash flows at a point in time in the future. You'd be calculating the future value if you want to know what your $500 may be worth in 10 years. You'd also be finding the future value if you want to find out what your retirement balance will be if you contribute $250 every month for 10 years.

Why Does Time Value of Money Matter?

The time value of money helps decision-makers select the best option. Time value of money equalizes options based on timing, as absolute dollar amounts spanning different time spans should not be valued equally.

Businesses often use time value of money to compare projects with varying cashflows. Businesses also use time value of money to determine whether a project with an initial cash outflow and subsequent cash inflows will be profitable. Companies may also be required to use time value of money principles for external reporting requirements.

Individual investors use time value of money to better understand the true value of their investments and obligations over time. The time value of money is used to calculate what an investor's retirement balance will be in the future.

The Bottom Line

These calculations demonstrate that time literally is money—the value of the money you have now is not the same as it will be in the future and vice versa. So, it is important to know how to calculate the time value of money so that you can distinguish between the worth of money related options offered to you now and in the future. These options could be investment opportunities, loan transactions, mortgage payment options, or even charity related donations. Whenever, money coming or going, at some point in time, is involved, time value of money should be considered.

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