Future Value of an Annuity Formula

Future Value of an Annuity Formula (Table of Contents)

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What is the Future Value of an Annuity Formula?

The term “annuity” refers to the series of successive equal payments that are either received by you or paid by you over a specific period of time at a given frequency. Consequently, “future value of annuity” refers to the value of these series of payments at some future date. Now, the future value of annuity are of two types:

1. Future Value of The Ordinary Annuity
2. Future Value of An Annuity Due

For the future value of the ordinary annuity (FVA _Ordinary), the payments are assumed to be at the end of the period and its formula can be mathematically expressed as,

Where,

• P: Periodic Payment
• n: Number of Periods
• i: Effective Rate of Interest

For the future value of annuity due (FVA _Due), the payments are assumed to be at the beginning of the period and its formula can be mathematically expressed as,

Let us take the example of Stefan who is planning to invest $10,000 annually for the next 10 years at a 5% interest rate in order to save money that is adequate for his son’s education. Calculate the money that Stefan will be able to save in case each deposit is made at the:

1. End of The Year
2. Beginning of The Year

Solution:

FVA _Ordinary is calculated using the formula given below

FVA _Ordinary = P * [(1 + i)ⁿ – 1] / i

• FVA _Ordinary = $10,000 * [(1 + 5%)¹⁰ – 1] / 5%
• FVA _Ordinary = $125,778.93 ~ $125,779

FVA _Due is calculated using the formula given below

FVA _Due = P * [(1 + i)ⁿ – 1] * (1 + i) / i

• FVA _Due = $10,000 * [(1 + 5%)¹⁰ – 1] * (1 + 5%) / 5%
• FVA _Due = $132,067.87 ~ $132,068

Therefore, Stefan will be able to save $125,779 in case of payments at the end of the year or $132,068 in case of payments at the beginning of the year.

Future Value of an Annuity Formula – Example #2

Let us take another example where Lewis will make a monthly deposit of $1,000 for the next five years. If the ongoing rate of interest is 6%, then calculate

1. Future value of the Ordinary Annuity
2. Future Value of Annuity Due

Solution:

FVA _Ordinary is calculated using the formula given below

FVA _Ordinary = P * [(1 + i)ⁿ – 1] / i

• FVA _Ordinary = $1,000 * [(1 + 0.5%)⁶⁰ – 1] / 0.5%
• FVA _Ordinary = $69,770.03 ~ $69,770

FVA _Due is calculated using the formula given below

FVA _Due = P * [(1 + i)ⁿ – 1] * (1 + i) / i

• FVA _Due = $1,000 * [(1 + 0.5%)⁶⁰ – 1] * (1 + 0.5%) / 0.5%
• FVA _Due = $70,118.88 ~ $70,119

Therefore, Lewis is expected to have $69,770 in case of payment at month end or $70,119 in case of payment at month start.

Explanation

The formula for Future Value of an Annuity formula can be calculated by using the following steps:

Step 1: Firstly, calculate the value of the future series of equal payments which is denoted by P.

Step 2: Next, calculate the effective rate of interest which is basically the expected market interest rate divided by the number of payments to be done during the year. It is denoted by i.

Step 3: Next, calculate the total number of periods for which the payment is to be made and it is computed as the product of a number of years and number of payments to be made in a year. It is denoted by n.

Step 4: Finally, in case the payments are to be made at the end of the period, then the future value of ordinary annuity formula should be calculated using the value of the series of payments (step 1), interest rate (step 2) and payment period (step 3) as shown below.

FVA _Ordinary = P * [(1 + i)ⁿ – 1] / i

On the other hand, in case of payments at the beginning of the period, then the future value of annuity due formula should be calculated using the value of the series of payments (step 1), interest rate (step 2) and payment period (step 3) as shown below.

FVA _Due = P * [(1 + i)ⁿ – 1] * (1 + i) / i

Relevance and Use of Future Value of an Annuity Formula

The concept of the future value of the annuity is an interesting topic as it not only captures the time value of money but also how the timing of payment during a given period makes difference to the overall future value of money. The future value of an annuity is primarily used in computing premium payments of life insurance policy, calculation of monthly contribution to provident fund, etc.

Future Value of an Annuity Formula Calculator

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Recommended Articles

This is a guide to the Future Value of an Annuity Formula. Here we discuss how to calculate the Future Value along with practical examples. We also provide a calculator with a downloadable excel template. You may also look at the following articles to learn more –

1. What is Annuity?
2. Calculation of Future Value of Annuity Due Formula
3. How to Calculate Present Value of Annuity?
4. Example of Present Value of Annuity Due Formula