## Definition

The term average mortgage identifies a succession of obligations, or receipts of money, occurring at consistent periods of period using an interest fee applied once a interval. By having a typical annuity, the payment or amount of money does occur at the close of each period.

### Calculation

Present Value of an Ordinary Annuity:

= P x [1 – (1 i)-N] / i

Future Value of an Ordinary Annuity:

= P x [(1 I)N – 1 ) ] / I

Where:

- P = charge or amount of cash
- N = number of periods or trades
- I interest

### Explanation

For your receipt or charge of cash to be considered a loan, it must have every one of the following features:

- The Sum of Money traded in every period has to be exactly the Exact Same
- The period phases should be of the Identical span
- Interest rates have been implemented once a interval

An annuity is often as easy as the regular deposit money into a checking accounts, or as complex as being a lifetime mortgage, and it is an insurance product which is utilized by Australians to give a steady flow of revenue.

With a typical annuity, also called an annuity-immediate, the payment or amount of money does occur at the ending of every period. This is different in the annuity on account of which demands the trade that occurs at the start of every period interval. Because of this, the amount of compounding periods to get a typical annuity is going to be just one less than the entire number of trades.

### Example

On January 1 st, Bill decided he would deposit $5,000 in the conclusion of each and every year to his retirement accounts fully for its subsequent twenty decades. The interest rate earned on that money is going to be 5 percent. Bill want to calculate the present value and future price with this retirement accounts balance by the close of twenty decades.

Present value of an ordinary annuity:

= 5,000 x [1 – (1 0.05)-20] / 0.05

= 5,000 x [1 – (1.05)-20] / / 0.05

= 5,000 x [1 – 0.37689] / / 0.05

= 5,000 x [0.62311] / / 0.05

= 5,000 x 12.462, or even $62,311.05

Future value of an ordinary annuity:

= 5,000 x [(1.05)20 – inch ] / 0.05

= 5,000 x [2.6533 – inch ] / 0.05

= 5,000 x [1.6533] / / 0.05

= 5,000 x 33.0660, or even $165,329.77